CA2034163A1 - Method of increasing the efficiency of an electrical generator (combination slis/e-slis) - Google Patents
Method of increasing the efficiency of an electrical generator (combination slis/e-slis)Info
- Publication number
- CA2034163A1 CA2034163A1 CA 2034163 CA2034163A CA2034163A1 CA 2034163 A1 CA2034163 A1 CA 2034163A1 CA 2034163 CA2034163 CA 2034163 CA 2034163 A CA2034163 A CA 2034163A CA 2034163 A1 CA2034163 A1 CA 2034163A1
- Authority
- CA
- Canada
- Prior art keywords
- generator
- current
- reducing
- effect
- excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/18—Synchronous generators having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generators
- H02K19/20—Synchronous generators having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generators with variable-reluctance soft-iron rotors without winding
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/22—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators
- H02K19/24—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators with variable-reluctance soft-iron rotors without winding
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/06—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving flux distributors, and both coil systems and magnets stationary
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
ABSTRACT OF THE INVENTION
This invention relates to a method of increasing the efficiency of an electrical generator of the type that generates real output power by a change of the reluctance of the magnetic flux path. The efficiency is improved by providing specific components, features and characteristics of the generator in combination in acccordance with a specific relationship so as to reduce the relative effect of the load. Also, the efficiency is improved by recognizing and reducing the effect of an alternating current superimposed on the excitation current.
This invention relates to a method of increasing the efficiency of an electrical generator of the type that generates real output power by a change of the reluctance of the magnetic flux path. The efficiency is improved by providing specific components, features and characteristics of the generator in combination in acccordance with a specific relationship so as to reduce the relative effect of the load. Also, the efficiency is improved by recognizing and reducing the effect of an alternating current superimposed on the excitation current.
Description
~ 2~3~ ~ $~
BACKGROUND OF THE INVENTION
This invention relates to a method of increasing the efficiency of an electrical generator which generates real ~-~
power by a change of the reluctance in the magnetic flux path through the generator. In particular, this invention relates to a method of increasing the efficiency of such generators by providing specific components, features and characteristics of -;
the generator in a combination so as to reduce the relative effect of the load on the generator.
In the past, electrical generators of the type described herein have been subject to inefficiencies. One of the difficulties was that as the real output power was ;
increased, there was a concomitant increase in the real input power. As the load on the generator increased, there was the concomitant increase in real input power, but the output current was low.
Also, in generators of this type, the inventor has discovered that during operation there is an alternating current superimposed on the excitation current in the excitation coil of the prior art generators. This alternating current has the effect of reducing current passing through the load, which has the tendency of reducing the efficiency of the generator.
:-. ,: : . . . : . . .~ : .. : :: :. : .
BACKGROUND OF THE INVENTION
This invention relates to a method of increasing the efficiency of an electrical generator which generates real ~-~
power by a change of the reluctance in the magnetic flux path through the generator. In particular, this invention relates to a method of increasing the efficiency of such generators by providing specific components, features and characteristics of -;
the generator in a combination so as to reduce the relative effect of the load on the generator.
In the past, electrical generators of the type described herein have been subject to inefficiencies. One of the difficulties was that as the real output power was ;
increased, there was a concomitant increase in the real input power. As the load on the generator increased, there was the concomitant increase in real input power, but the output current was low.
Also, in generators of this type, the inventor has discovered that during operation there is an alternating current superimposed on the excitation current in the excitation coil of the prior art generators. This alternating current has the effect of reducing current passing through the load, which has the tendency of reducing the efficiency of the generator.
:-. ,: : . . . : . . .~ : .. : :: :. : .
2~3'~ ~3 ~:
S~MMARY OF THE INVENTION
Accordingly, it is an object of this invention to at least partially overcome the disadvantages of the prior art.
Also, it is an object of this invention to provide an alternative type of electrical generator in which the relative effect of the load is reduced. And, it is a further object of this invention to reduce the effect of the alternating current that is superimposed on the excitation current of such generators.
Accordingly, in one of its broad aspects, this ~-invention resides in providing a method of increasing the efficiency of an electrical generator for use in association with a generator which generates real output power by a change of the reluctance of the magnetic flux path; the method comprising: providing the following components, features and ~-characteristics of the generator: -(a) number of turns [Nl] of excitation coils of an excitation circuit around the magnetic flux path;
(b) number of turns [N2] of load coils around the magnetic flux path;
(c) number of poles [p] of the reluctance-changing part;
(d) revolutions per minute [n] of the reluctance-changing part;
(e) average reluctance ~Ra] of the magnetic flux path; and (f) amplitude of change [Rc] of the reluctance of the magnetic flux path:
in a combination so as to reduce the relative effect of a load ., .
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[RL ohms] in the load coil in the ~ollowing relationship:
(Nl/N2) x Iex ~: ~
Rc 1 + jRL
_ Ra N22w where w = 2~rnp = 2 f, where f = np.
Further aspects of the invention reside in providing methods and means for reducing the effect of the alternating :
cuerent which is superimposed on the excitation coil.
Further aspects of the invention reside in providing an electrical generator without a rotor or other moving part of the magnetic flux path of the generator by which the reluctance is changed. ~
Further aspects of the invention will become apparent :: :
upon reading the following detailed description and the ~ ~
drawings which illustrate the invention and preferred ;:
embod1ments of the invention.
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BRIEF DESCRIPTION OF THE DRAWINGS ..
In the drawings: :
Figure 1 is a schematic, perspecti.ve view of a preferred embodiment of the invention;
Figure 2 is a preferred embodiment oE a reducing circuit of the invention;
Figure 3 is a schematic drawing of a preferred embodiment of the logic and thyristor circuits of a reducing circuit of the invention; :~
Figure 4 is a schematic, perspective view of two generators of the invention having common stator and rotor;
Figure 5 is a schematic, perspective view of two generators of the invention constructed substantially identically;
Figure 6 is a schematic, perspective view of a ~-further embodiment of the invention;
Figure 7 is a schematic, perspective view of a further embodiment of the invention;
Figure 8 is a schematic, perspective view of a further embodiment of the invention.
Figure 9 is a schematic, perspective view of a ; ~
further embodiment of the invention; and ;~.
Figure 10 is a schematic, perspective view of a ~ .
further embodiment of the invention.~
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DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
OF THE I~VENTION
Shown in Figure 1 is a simplified generator 10 of the type that generates real output power Por by change of the reluctance R in a magnetic flux path 12. The generator 10 as shown has a stator 14 and a rotor 16 which form the magnetic flux path 12. Rotor 16 is rotated by shaft 18. Shaft 18 is driven by input power Pi. Shaft 18 and, therefore, rotor 16 rotate at a rate of "n" revolutions per minute.
When rotor 16 is in position 16A as shown in -~
Figure 1, the reluctance R of the magnetic flux path 12 is maximum. When the rotor 16 is in position 16B as shown by dashed lines in Figure 1, the reluctance R is a minimum. The average reluctance "Ra" of the magnetic flux path 12 can be determined with respect to time. Also, the amplitude of change ~
"Rc" of the reluctance R of the magnetic flux path 12 can be ~ ~;
determined with respect to time. In this embodiment, the -reluctance-changing part is the rotor 16.
As shown in Figure 1, the number of poles "ptl of rotor 16 is two poles, pl and p2. However, it is possible for the rotor 16 to have a greater number of poles as is practical. In practical generators, the number of poles p would usually be in the range of about 2 to 36.;~
Excitation circuit 20 has an excitation source 22 which is a d.c. or a.c. source. The excitation source 22 supplies excitation current Iex through excitation colls 24, ~ 6 - 2 0 3 ~
which are coiled around the magnetic ~lux path 12. The number of excitation coils 24 i8 "Nl". As shown for simplicity in Figure 1, Nl is three. However, in practical generators, Nl would usually be in the range of about 3 to several thousands, say to about 50,000.
Also shown in Figure 1 a load circuit 26. Load circuit 26 has a load "RL" which is connected to load coils 28 which are coiled around the magnetic flux path 12. The number of load coils 28 is "N2". As shown for simplicity in Figure 1, N2 is five. However, in practical generators, N2 would usually be in the range of about 3 to several thousands, say to about 45,000.
It has been discovered, recognized and determined by the present inventor that the base harmonic of the effective current Ieff passing through the load circuit 26, and thus the load RL, is proportional to the following relationship (where the symbols have the meanings as given above):
(Nl/N2) x Iex Rc 1 + jRL
Ra N22w where w = 2~ np.
Equation 1 :: . : , . - : . ~
f'", ' .
~ ` ~ 2 ~ 3 ~
By recognizing that the real output power Por of the generator 10 is defined by the following relationship: -Por = (Ieff) x RL ~
Equation 2 ~; ;
the present inventor has recognized that the effect of the load RL on the real input power requirement can be reduced by reducing the relative effect of the load RL in Equation 1 above.
The relative effect of the load RL in Equation 1 can be reduced by providing the generator 10 with a combination of components, features and characteristics C so as to increase the value of Equation 1 for a given load RL, or even an increased load RL, without decreasing the load RL itself.
Particularily, this task is accomplished by providing the following components, features and characteristics (referred to collectively as components C) of the generator 10 in a ~;
combination so as to reduce the relative effect of the load RL
in the relationship as de~ined by Equation 1.
In a preferred embodiment of the invention, the components C are provided such that the value of:
" `; `
RL
Equation 3 ~;
`~ ' '~',.
' . - .,: ' ' : ' , ' :' ' ~ -'~' '.. '' .'' . - '. . ': ,. ' ' . `
'-' 203l~3 ; ~ , approaches zero by increasing the product N2 w by increasing the number of turns N2 of the load coils 28 and/or w, or both, and the ratio of Nl/N2 does decrease substantially.
In a further preferred embodiment of the invention, the ratio ~l/N2 increases substantially when the number of turns N2 of the load coils 28 is increased by further increasing the number of turns Nl of the excitation coils 24.
The present inventor has also discovered, recognized and determined that during operation of the generators of the type as described herein, there is an alternating current Is which is superimposed on the excitation current Iex in the excitation coils 24 of excitation circuit 20. This superimposed current Is has an effect of reducing the effective current Ieff passing through the load coils 28 and the load RL. Thus, having discovered, recognized and determined the .
existence of this deleterious superimposed current Is, it is recognized that the effect of the superimposed current Is should be reduced.
In a preferred embodiment of the invention. the effect of the superimposed current Is is reduced by inserting in the excitation circuit 20 a reducing circuit 30 as shown generally in Figure 1. Preferrably, as shown in Figure 2, the reducing circuit 30 comprises a comparator means 32 for comparing the varying amplitude Iex-amp of the excitation current Iex to an amplitude Idc-amp of a d.c. current Idc. The reducing circuit 30 also comprises a reduction means 34 for reducing the difference D between the varying amplitude Iex-amp ,.
. .. .. . . . .. : ~ .- .
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of the excitation current Iex and the amplitude Idc-amp of the d.c. current Idc.
Preferably, the comparator means 32 and the reducing ?
means 34 are comprised of logic and thyristor circuits which could be designed, constructed and implemented by those skilled in the art of electronic circuitry. An example of s~ch circuits is shown in Figure 3.
In another preferred embodiment for reducing the effect of the superimposed current Is, the effect of the ;~-superimposed current Is is reduced by providing a common d.c, supply 50 to excite the first generator 10 and to excite a second generator 100. The second generator 100 may be constructed together with the first generator 10, and having a common rotor 16, as shown in Figure 4, or a common stator (not shown). Alternatively, the second generator ;i~
100' may be constructed separately from the first generator 10 and substantially identical to the first generator 10, as shown in Figure 5.
Althouth the invention has been described thus far with respect to a specific form of generator which generates electrical power by periodically changing the reluctance of the magnetic flux path of the generator, the invention is applicable to other specific forms of such generators. One ;~
such generator is shown in Figure 6 as generator 40. In ;;
this embodiment, the generator 40 is substantially the same as generator 10 as described above, except that instead of the rotor as the reluctance-changing part, generator 40 has ~: . . . . .
.: - . .
.. , . . , . . ~ .
` 2~3~3 - 1 0 - , , a moving part 42 through which the magnetic flux path 12 passes as the reluctance-changing part.
The magnetic reluctance R can be changed periodically by moving the part 42 of the magnetic flux path 12 in a generally in and out direction as indicated generally as A, or in a generally to and ~ro direction as indicated generally as B.
In this embodiment, the "number of poles -pll of the reluctance-changing part" should be considered to be 2, and the "revolutions per minute 'In" of the reluctance~
changing part" should be considered to be one half the number of times per minute that the reluctance R
periodically changes as a result of the movement of the part 42.
In another form of generator 50, as shown in : :~
Figure 7, there is a plurality of parts 52 which are mounted .:,, on a rotating body 54 tpartially shown) such that the parts 52 are rotated past the ends 56A and 56B of the stationary part 58 of the magnetic flux path 12 of the generator 50 so as to periodically change the reluctance R of the magnetic flux path 12. In this embodiment, the reluctance-changing part is the part 52 and, therefore, the "number of poles "p on the reluctance-changing part" should be considered to be the number of parts 52 mounted on the rotating body 54, and :
the "revolutions per minute nn" of the reluctance-changing part" should be considered to be the revolutions per minute of the rotating body 54.
~ ~ 3 ~
In yet another embodiment of the invention, the ''~';
reluctance of the magnetic flux path is changed without the necessity of rotating a rotor or spatially moving a part of .
the magnetic flux path. The change in reluct:ance is ~ : .
obtained by magnetically saturating or nearly saturating a ~ ~;
portion of the magnetic flux path of the generator. ~ , In this form of generator, as shown in Figure 8, generator 60 has a flrst or primary magnetic flux path 12, a stator portion 14, excitation circuit 20 with excitation source 22 and load circuit 26 all as described above with ~
respect to generator 10. However, instead of having rotor i.-16 or moving parts 42 or 52, generator 60 has a common , region 62 and a secondary magnetic flux path 64 which passes ~
through the common region 62. The first or primary magnetic .' ', flux path 12 also passes through the common region 62. The ~ , secondary magnetic flux path 64 may also be referred to as '~
the efficiency-improving magnetic flux path 64. ;~
The excitation circuit 20 includes the excitation ~ ,,.
current Iex which may also be referred to as the primary current Ip. The primary current induces the primary magnetic flux Fp which follows the primary magnetic flux path 12.
The efficiency-improving magnetic flux path 64 is positioned and configured with respect to the first magnetic ~ .
flux path 12 such that,there is a first region 12' of the ;~, first magnetic flux path 12 that extends between the Pirst ::
portion 12A of the first magnetic path 12 and the second .,.. . . . -. ....... . . , , . , , . ,. ~ , ;:.:: . , , -`` 2~3~1 ~3 ~-~
portion 12B of the first magnetic path 12 not in the common region 62 but in the stator portion 14. There is also a second region 12'' of the first magnetic flux path 12 that extends between the first portion 12A of the ~irst magnetic flux path 12 and the second portion 12B of the first magnetic flux path 12 that is in the common region 62.
The second region 12'' is the common region 62.
This region is common to both the ~irst magnetic flux path 12 and the efficiency-improving magnetic flux path 64. ~;
The efficiency-improving magnetlc flux path 64 has ~
a magnetic reluctance MR2, and a first end portion 64A and a : .
second end portion 64B. The first end portion 64A is magnetically connected, preferably through an optional gap 66A, to a first portion 12A of the first magnetic path 12 .
and the second end portion 64B is magnetically connected, preferably through an optional gap 66B, to a second portion :
12B of the first magnetic path 12. In this embodiment, the portions 12A and 12B are located on the the common .
region 62.
The first region 12' has a magnetic reluctance MR' and the second region 12" has a magnetic reluctance MR". :
The magnetic reluctance MR" of the common region 62 is greater when saturated, and preferably much greater, than .;
the magnetic reluctance MR' of the first region 12'. This can be readily accomplished by having the common region 62 periodically saturated by means 70. ~
- .
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The means 70 includes an electric conductor loop 72 with at least one loop 72A around the efficiency-improving magnetic flux path 64. When tertiary electric ~
current It, which is preferably reactive current or ::~ -substantially reactive current with a frequency "f", is caused to flow in the conductor loop 72, for example by reason of a suitable power source 74, a tertiary varying magnetic flux Ft with a frequency of "f" can be induced ~:
which will periodically saturate the common region 62. ;
Preferably, the frequency "f" will be within the range of ~ ~
about 5 Hertz to about 1000 MegaHertz. However, the ;
particular frequency selected will depend on the particular application.
The appropriate selection of tertiary current It ~::
will result in the magnitude and direction of tertiary flux ;~
, .; .: . .
Ft being substantially in the same direction as the primary flux Fp in the common region 62.
Also included within the invention is means for subtantially preventing the primary magnetic flux Fp from . .
flowing in the efficiency-improving magnetic flux path 64 : :
that is not in the common region 62. In one embodiment of the invention, this means comprises the magnetic reluctance ~
MR2 of the efficiency-improving magnetic flux path 64 ~-outside the common region 62 being substantially greater .
than the magnetic reluctance MR'' of the common region 62.
In another embodiment of the invention, the means for substantially preventing the p~imary magnetic flux Fp ;~
::,:. ,: . . ,, . : . : ~ . . . . .
2 0 ~ 3 from flowing in the efficiency-improving magnetic ~lux path 64 outside the common regioin 62 comprises the magnitude of the tertiary magnetic flux Ft being substantially greater than the magnitude of t:he primar~y : ~
magnetic flux Fp. .
In another embodiment of the invention, both end portions 64A, 64B of the efficiency-improving magnetic flux path 64 are directly connected magnetically to the first .
magnetic flux path 12 by physically connecting the relevant :
end portions 64A, 64B to the relevant first and second ~
portions 12A, 12B of the first magnetic flux path. This . :
embodiment is shown in Figure 9.
In another embodiment of the lnvention, only one end portion 64A, 64B of the efficiency-improving magnetic flux path 64 is spatially separated from the first magnetic :
flux path 12 by a gap 66A or 66~.
The gap 66A or 66B may be an air gap or a gap made :
from a material having a magnetic reluctance greater than ~
the magnetic reluctance MR2 of the efficiency-improving ~ ;
magnetic flux path 64 outside the common region 62 or the ~ .
magnetic reluctance MR'' of the.common region 62. .~ .
PreEerably, the common region 62 is spatially separated from the efficiency-improving magnetic. flux path 64 outside the common region 62 and from the first portion 12' of the first magnetic flux path 12 as shown in ~ :
Figure 8. Preferably, the common region 62 is spatially separated from the first portion 12' of the first magnetic .~:
.... . . . . . . .
." ' ' . :. '. ' ~ ': ' ; - 15 - 2~3~63 flux path 12 by gaps 68A and 68B which may be air gaps or gaps of other suitable mateeial.
Also, it is possible to have the common region 62 physically connected to the first region 12' either at one of the regions 12A or 12B, or at both of the 12A and 12B
locations, as shown in Figure 10.
In these embodiments where the change in reluctance is developed by magnetic saturatio:n, the :
reluctance-changing part is that part of the generator that ~: :
causes the change in the reluctance and, ~herefore, product .:;
"np" which has previously been defined as the "number of .. ~
poles "p" on the reluctance-changing part" multiplied by the ;; :
"revolutions per minute "n" of the reluctance-changing part" ~ ;
should be considered to be the Erequency "f" as described above multlplied by 60~ or np = f x 60 ~
Therefore, "n" should be considered to be f divided by p and ` :
multiplied by 60, and "p" should be considered to be f divided by n and multiplied by 60, such that n = f x 60 :
p .. ::" :'. ' and p = f x 60 n In other embodiments of the invention, the excitation circuit is replaced by a permanent magnet. The :
permanent magnet will produce the primary magnetic flux.
. . . . - . ~ ~.
2 ~ 3 ~
.
Therefore, the product Wl x Iex in Equation l is replaced by the appropriate equivalent for the particular arrangement of permanent magnets. It will be understood by those skilled .
in the appropriate arts as to what the appropriate equivalent ought to be.
It will be understood that, although various . ::
features of the invention have been described with respect to one or another of the embodiments of the invention, the ;
various features and embodiments of the invention may be ~:~
combined or us~d in conjunction with other features and embodiments of the invention as described and illustrated : -herein.
Although this disclosure has described and illustrated certain preEerred embodiments of the invention, :
it is to be understood that the invention is not restricted to these particular embodiments. Rather, the invention ~
includes all embodiments which are functional, electrical, ;~:.
magnetic or mechanical equivalents of the specific ` `~
embodiments and features that have been described and illustrated herein. ;:
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S~MMARY OF THE INVENTION
Accordingly, it is an object of this invention to at least partially overcome the disadvantages of the prior art.
Also, it is an object of this invention to provide an alternative type of electrical generator in which the relative effect of the load is reduced. And, it is a further object of this invention to reduce the effect of the alternating current that is superimposed on the excitation current of such generators.
Accordingly, in one of its broad aspects, this ~-invention resides in providing a method of increasing the efficiency of an electrical generator for use in association with a generator which generates real output power by a change of the reluctance of the magnetic flux path; the method comprising: providing the following components, features and ~-characteristics of the generator: -(a) number of turns [Nl] of excitation coils of an excitation circuit around the magnetic flux path;
(b) number of turns [N2] of load coils around the magnetic flux path;
(c) number of poles [p] of the reluctance-changing part;
(d) revolutions per minute [n] of the reluctance-changing part;
(e) average reluctance ~Ra] of the magnetic flux path; and (f) amplitude of change [Rc] of the reluctance of the magnetic flux path:
in a combination so as to reduce the relative effect of a load ., .
' ' " ' ' ' . ' ' ' ,. ' . . '. . ' ; - ' . -, :': ' .' . . :, :~ ', : . ' ' . : .
~ `~
~ 3 ~ 203~163 ~ ~
;: ,.
[RL ohms] in the load coil in the ~ollowing relationship:
(Nl/N2) x Iex ~: ~
Rc 1 + jRL
_ Ra N22w where w = 2~rnp = 2 f, where f = np.
Further aspects of the invention reside in providing methods and means for reducing the effect of the alternating :
cuerent which is superimposed on the excitation coil.
Further aspects of the invention reside in providing an electrical generator without a rotor or other moving part of the magnetic flux path of the generator by which the reluctance is changed. ~
Further aspects of the invention will become apparent :: :
upon reading the following detailed description and the ~ ~
drawings which illustrate the invention and preferred ;:
embod1ments of the invention.
::
'~
, 203~
- 4 - :
BRIEF DESCRIPTION OF THE DRAWINGS ..
In the drawings: :
Figure 1 is a schematic, perspecti.ve view of a preferred embodiment of the invention;
Figure 2 is a preferred embodiment oE a reducing circuit of the invention;
Figure 3 is a schematic drawing of a preferred embodiment of the logic and thyristor circuits of a reducing circuit of the invention; :~
Figure 4 is a schematic, perspective view of two generators of the invention having common stator and rotor;
Figure 5 is a schematic, perspective view of two generators of the invention constructed substantially identically;
Figure 6 is a schematic, perspective view of a ~-further embodiment of the invention;
Figure 7 is a schematic, perspective view of a further embodiment of the invention;
Figure 8 is a schematic, perspective view of a further embodiment of the invention.
Figure 9 is a schematic, perspective view of a ; ~
further embodiment of the invention; and ;~.
Figure 10 is a schematic, perspective view of a ~ .
further embodiment of the invention.~
.. ,. -, ,, . ., , ,...... ,, . . ...................... : .,. .
., .; " , ~ .; . . . - . - . : ~
~ ~3~1~3 `~ ~
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
OF THE I~VENTION
Shown in Figure 1 is a simplified generator 10 of the type that generates real output power Por by change of the reluctance R in a magnetic flux path 12. The generator 10 as shown has a stator 14 and a rotor 16 which form the magnetic flux path 12. Rotor 16 is rotated by shaft 18. Shaft 18 is driven by input power Pi. Shaft 18 and, therefore, rotor 16 rotate at a rate of "n" revolutions per minute.
When rotor 16 is in position 16A as shown in -~
Figure 1, the reluctance R of the magnetic flux path 12 is maximum. When the rotor 16 is in position 16B as shown by dashed lines in Figure 1, the reluctance R is a minimum. The average reluctance "Ra" of the magnetic flux path 12 can be determined with respect to time. Also, the amplitude of change ~
"Rc" of the reluctance R of the magnetic flux path 12 can be ~ ~;
determined with respect to time. In this embodiment, the -reluctance-changing part is the rotor 16.
As shown in Figure 1, the number of poles "ptl of rotor 16 is two poles, pl and p2. However, it is possible for the rotor 16 to have a greater number of poles as is practical. In practical generators, the number of poles p would usually be in the range of about 2 to 36.;~
Excitation circuit 20 has an excitation source 22 which is a d.c. or a.c. source. The excitation source 22 supplies excitation current Iex through excitation colls 24, ~ 6 - 2 0 3 ~
which are coiled around the magnetic ~lux path 12. The number of excitation coils 24 i8 "Nl". As shown for simplicity in Figure 1, Nl is three. However, in practical generators, Nl would usually be in the range of about 3 to several thousands, say to about 50,000.
Also shown in Figure 1 a load circuit 26. Load circuit 26 has a load "RL" which is connected to load coils 28 which are coiled around the magnetic flux path 12. The number of load coils 28 is "N2". As shown for simplicity in Figure 1, N2 is five. However, in practical generators, N2 would usually be in the range of about 3 to several thousands, say to about 45,000.
It has been discovered, recognized and determined by the present inventor that the base harmonic of the effective current Ieff passing through the load circuit 26, and thus the load RL, is proportional to the following relationship (where the symbols have the meanings as given above):
(Nl/N2) x Iex Rc 1 + jRL
Ra N22w where w = 2~ np.
Equation 1 :: . : , . - : . ~
f'", ' .
~ ` ~ 2 ~ 3 ~
By recognizing that the real output power Por of the generator 10 is defined by the following relationship: -Por = (Ieff) x RL ~
Equation 2 ~; ;
the present inventor has recognized that the effect of the load RL on the real input power requirement can be reduced by reducing the relative effect of the load RL in Equation 1 above.
The relative effect of the load RL in Equation 1 can be reduced by providing the generator 10 with a combination of components, features and characteristics C so as to increase the value of Equation 1 for a given load RL, or even an increased load RL, without decreasing the load RL itself.
Particularily, this task is accomplished by providing the following components, features and characteristics (referred to collectively as components C) of the generator 10 in a ~;
combination so as to reduce the relative effect of the load RL
in the relationship as de~ined by Equation 1.
In a preferred embodiment of the invention, the components C are provided such that the value of:
" `; `
RL
Equation 3 ~;
`~ ' '~',.
' . - .,: ' ' : ' , ' :' ' ~ -'~' '.. '' .'' . - '. . ': ,. ' ' . `
'-' 203l~3 ; ~ , approaches zero by increasing the product N2 w by increasing the number of turns N2 of the load coils 28 and/or w, or both, and the ratio of Nl/N2 does decrease substantially.
In a further preferred embodiment of the invention, the ratio ~l/N2 increases substantially when the number of turns N2 of the load coils 28 is increased by further increasing the number of turns Nl of the excitation coils 24.
The present inventor has also discovered, recognized and determined that during operation of the generators of the type as described herein, there is an alternating current Is which is superimposed on the excitation current Iex in the excitation coils 24 of excitation circuit 20. This superimposed current Is has an effect of reducing the effective current Ieff passing through the load coils 28 and the load RL. Thus, having discovered, recognized and determined the .
existence of this deleterious superimposed current Is, it is recognized that the effect of the superimposed current Is should be reduced.
In a preferred embodiment of the invention. the effect of the superimposed current Is is reduced by inserting in the excitation circuit 20 a reducing circuit 30 as shown generally in Figure 1. Preferrably, as shown in Figure 2, the reducing circuit 30 comprises a comparator means 32 for comparing the varying amplitude Iex-amp of the excitation current Iex to an amplitude Idc-amp of a d.c. current Idc. The reducing circuit 30 also comprises a reduction means 34 for reducing the difference D between the varying amplitude Iex-amp ,.
. .. .. . . . .. : ~ .- .
-` 2 ~ 3 ~
of the excitation current Iex and the amplitude Idc-amp of the d.c. current Idc.
Preferably, the comparator means 32 and the reducing ?
means 34 are comprised of logic and thyristor circuits which could be designed, constructed and implemented by those skilled in the art of electronic circuitry. An example of s~ch circuits is shown in Figure 3.
In another preferred embodiment for reducing the effect of the superimposed current Is, the effect of the ;~-superimposed current Is is reduced by providing a common d.c, supply 50 to excite the first generator 10 and to excite a second generator 100. The second generator 100 may be constructed together with the first generator 10, and having a common rotor 16, as shown in Figure 4, or a common stator (not shown). Alternatively, the second generator ;i~
100' may be constructed separately from the first generator 10 and substantially identical to the first generator 10, as shown in Figure 5.
Althouth the invention has been described thus far with respect to a specific form of generator which generates electrical power by periodically changing the reluctance of the magnetic flux path of the generator, the invention is applicable to other specific forms of such generators. One ;~
such generator is shown in Figure 6 as generator 40. In ;;
this embodiment, the generator 40 is substantially the same as generator 10 as described above, except that instead of the rotor as the reluctance-changing part, generator 40 has ~: . . . . .
.: - . .
.. , . . , . . ~ .
` 2~3~3 - 1 0 - , , a moving part 42 through which the magnetic flux path 12 passes as the reluctance-changing part.
The magnetic reluctance R can be changed periodically by moving the part 42 of the magnetic flux path 12 in a generally in and out direction as indicated generally as A, or in a generally to and ~ro direction as indicated generally as B.
In this embodiment, the "number of poles -pll of the reluctance-changing part" should be considered to be 2, and the "revolutions per minute 'In" of the reluctance~
changing part" should be considered to be one half the number of times per minute that the reluctance R
periodically changes as a result of the movement of the part 42.
In another form of generator 50, as shown in : :~
Figure 7, there is a plurality of parts 52 which are mounted .:,, on a rotating body 54 tpartially shown) such that the parts 52 are rotated past the ends 56A and 56B of the stationary part 58 of the magnetic flux path 12 of the generator 50 so as to periodically change the reluctance R of the magnetic flux path 12. In this embodiment, the reluctance-changing part is the part 52 and, therefore, the "number of poles "p on the reluctance-changing part" should be considered to be the number of parts 52 mounted on the rotating body 54, and :
the "revolutions per minute nn" of the reluctance-changing part" should be considered to be the revolutions per minute of the rotating body 54.
~ ~ 3 ~
In yet another embodiment of the invention, the ''~';
reluctance of the magnetic flux path is changed without the necessity of rotating a rotor or spatially moving a part of .
the magnetic flux path. The change in reluct:ance is ~ : .
obtained by magnetically saturating or nearly saturating a ~ ~;
portion of the magnetic flux path of the generator. ~ , In this form of generator, as shown in Figure 8, generator 60 has a flrst or primary magnetic flux path 12, a stator portion 14, excitation circuit 20 with excitation source 22 and load circuit 26 all as described above with ~
respect to generator 10. However, instead of having rotor i.-16 or moving parts 42 or 52, generator 60 has a common , region 62 and a secondary magnetic flux path 64 which passes ~
through the common region 62. The first or primary magnetic .' ', flux path 12 also passes through the common region 62. The ~ , secondary magnetic flux path 64 may also be referred to as '~
the efficiency-improving magnetic flux path 64. ;~
The excitation circuit 20 includes the excitation ~ ,,.
current Iex which may also be referred to as the primary current Ip. The primary current induces the primary magnetic flux Fp which follows the primary magnetic flux path 12.
The efficiency-improving magnetic flux path 64 is positioned and configured with respect to the first magnetic ~ .
flux path 12 such that,there is a first region 12' of the ;~, first magnetic flux path 12 that extends between the Pirst ::
portion 12A of the first magnetic path 12 and the second .,.. . . . -. ....... . . , , . , , . ,. ~ , ;:.:: . , , -`` 2~3~1 ~3 ~-~
portion 12B of the first magnetic path 12 not in the common region 62 but in the stator portion 14. There is also a second region 12'' of the first magnetic flux path 12 that extends between the first portion 12A of the ~irst magnetic flux path 12 and the second portion 12B of the first magnetic flux path 12 that is in the common region 62.
The second region 12'' is the common region 62.
This region is common to both the ~irst magnetic flux path 12 and the efficiency-improving magnetic flux path 64. ~;
The efficiency-improving magnetlc flux path 64 has ~
a magnetic reluctance MR2, and a first end portion 64A and a : .
second end portion 64B. The first end portion 64A is magnetically connected, preferably through an optional gap 66A, to a first portion 12A of the first magnetic path 12 .
and the second end portion 64B is magnetically connected, preferably through an optional gap 66B, to a second portion :
12B of the first magnetic path 12. In this embodiment, the portions 12A and 12B are located on the the common .
region 62.
The first region 12' has a magnetic reluctance MR' and the second region 12" has a magnetic reluctance MR". :
The magnetic reluctance MR" of the common region 62 is greater when saturated, and preferably much greater, than .;
the magnetic reluctance MR' of the first region 12'. This can be readily accomplished by having the common region 62 periodically saturated by means 70. ~
- .
:.~ : : : : . . ............................... .: .... . :
:; - . :~, . , ~ . . . :, .. :: :. :
`` 2~3~
The means 70 includes an electric conductor loop 72 with at least one loop 72A around the efficiency-improving magnetic flux path 64. When tertiary electric ~
current It, which is preferably reactive current or ::~ -substantially reactive current with a frequency "f", is caused to flow in the conductor loop 72, for example by reason of a suitable power source 74, a tertiary varying magnetic flux Ft with a frequency of "f" can be induced ~:
which will periodically saturate the common region 62. ;
Preferably, the frequency "f" will be within the range of ~ ~
about 5 Hertz to about 1000 MegaHertz. However, the ;
particular frequency selected will depend on the particular application.
The appropriate selection of tertiary current It ~::
will result in the magnitude and direction of tertiary flux ;~
, .; .: . .
Ft being substantially in the same direction as the primary flux Fp in the common region 62.
Also included within the invention is means for subtantially preventing the primary magnetic flux Fp from . .
flowing in the efficiency-improving magnetic flux path 64 : :
that is not in the common region 62. In one embodiment of the invention, this means comprises the magnetic reluctance ~
MR2 of the efficiency-improving magnetic flux path 64 ~-outside the common region 62 being substantially greater .
than the magnetic reluctance MR'' of the common region 62.
In another embodiment of the invention, the means for substantially preventing the p~imary magnetic flux Fp ;~
::,:. ,: . . ,, . : . : ~ . . . . .
2 0 ~ 3 from flowing in the efficiency-improving magnetic ~lux path 64 outside the common regioin 62 comprises the magnitude of the tertiary magnetic flux Ft being substantially greater than the magnitude of t:he primar~y : ~
magnetic flux Fp. .
In another embodiment of the invention, both end portions 64A, 64B of the efficiency-improving magnetic flux path 64 are directly connected magnetically to the first .
magnetic flux path 12 by physically connecting the relevant :
end portions 64A, 64B to the relevant first and second ~
portions 12A, 12B of the first magnetic flux path. This . :
embodiment is shown in Figure 9.
In another embodiment of the lnvention, only one end portion 64A, 64B of the efficiency-improving magnetic flux path 64 is spatially separated from the first magnetic :
flux path 12 by a gap 66A or 66~.
The gap 66A or 66B may be an air gap or a gap made :
from a material having a magnetic reluctance greater than ~
the magnetic reluctance MR2 of the efficiency-improving ~ ;
magnetic flux path 64 outside the common region 62 or the ~ .
magnetic reluctance MR'' of the.common region 62. .~ .
PreEerably, the common region 62 is spatially separated from the efficiency-improving magnetic. flux path 64 outside the common region 62 and from the first portion 12' of the first magnetic flux path 12 as shown in ~ :
Figure 8. Preferably, the common region 62 is spatially separated from the first portion 12' of the first magnetic .~:
.... . . . . . . .
." ' ' . :. '. ' ~ ': ' ; - 15 - 2~3~63 flux path 12 by gaps 68A and 68B which may be air gaps or gaps of other suitable mateeial.
Also, it is possible to have the common region 62 physically connected to the first region 12' either at one of the regions 12A or 12B, or at both of the 12A and 12B
locations, as shown in Figure 10.
In these embodiments where the change in reluctance is developed by magnetic saturatio:n, the :
reluctance-changing part is that part of the generator that ~: :
causes the change in the reluctance and, ~herefore, product .:;
"np" which has previously been defined as the "number of .. ~
poles "p" on the reluctance-changing part" multiplied by the ;; :
"revolutions per minute "n" of the reluctance-changing part" ~ ;
should be considered to be the Erequency "f" as described above multlplied by 60~ or np = f x 60 ~
Therefore, "n" should be considered to be f divided by p and ` :
multiplied by 60, and "p" should be considered to be f divided by n and multiplied by 60, such that n = f x 60 :
p .. ::" :'. ' and p = f x 60 n In other embodiments of the invention, the excitation circuit is replaced by a permanent magnet. The :
permanent magnet will produce the primary magnetic flux.
. . . . - . ~ ~.
2 ~ 3 ~
.
Therefore, the product Wl x Iex in Equation l is replaced by the appropriate equivalent for the particular arrangement of permanent magnets. It will be understood by those skilled .
in the appropriate arts as to what the appropriate equivalent ought to be.
It will be understood that, although various . ::
features of the invention have been described with respect to one or another of the embodiments of the invention, the ;
various features and embodiments of the invention may be ~:~
combined or us~d in conjunction with other features and embodiments of the invention as described and illustrated : -herein.
Although this disclosure has described and illustrated certain preEerred embodiments of the invention, :
it is to be understood that the invention is not restricted to these particular embodiments. Rather, the invention ~
includes all embodiments which are functional, electrical, ;~:.
magnetic or mechanical equivalents of the specific ` `~
embodiments and features that have been described and illustrated herein. ;:
`'' . ~
~; . '' .
~', `~ '',
Claims (32)
1. A method of increasing the efficiency of an electrical generator for use in association with a generator having a magnetic flux path having a reluctance wherein the generator generates real output power by a change of the reluctance of the magnetic flux path; the method comprising:
providing the following components, features and characteristics of the generator:
(a) number of turns [N1] of excitation coils of an excitation circuit around the magnetic flux path;
(b) number of turns [N2] of load coils around the magnetic flux path;
(c) number of poles [p] of a reluctance-changing part;
(d) revolutions per minute [n] of the reluctance-changing part;
(e) average reluctance [Ra] of the magnetic flux path; and (f) amplitude of change [Rc] of the reluctance of the magnetic flux path:
in a combination so as to reduce the relative effect of a load [RL ohms] in the load coil in the following relationship:
where .
providing the following components, features and characteristics of the generator:
(a) number of turns [N1] of excitation coils of an excitation circuit around the magnetic flux path;
(b) number of turns [N2] of load coils around the magnetic flux path;
(c) number of poles [p] of a reluctance-changing part;
(d) revolutions per minute [n] of the reluctance-changing part;
(e) average reluctance [Ra] of the magnetic flux path; and (f) amplitude of change [Rc] of the reluctance of the magnetic flux path:
in a combination so as to reduce the relative effect of a load [RL ohms] in the load coil in the following relationship:
where .
2. The method as defined in claim 1 wherein the components, features and characteristics are provided such that the magnitude of:
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
3. The method as defined in claim 1 wherein the ratio of N1/N2 increases substantially when N2 is increased by further increasing N1.
4. The method as defined in claim 1 for use in association with the generator which further has an alternating current superimposed on an excitation current in the excitation coil which has an effect of reducing current passing through the load coils, the method further comprising reducing the effect of the alternating current.
5. The method as defined in claim 4 wherein the effect of the alternating current is reduced by inserting in the excitation coil a reducing circuit.
6. The method as defined in claim 5 wherein the reducing circuit comprises:
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
7. The method as defined in claim 6 wherein the comparator means and the reducing means are comprised of logic and thyristor circuits.
8. The method of claim 4 wherein the effect of the alternating current is reduced by providing a common d.c. supply to excite the first generator and to excite a second generator, wherein the second generator is either:
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
9. A method as defined in claim 1 wherein the reluctance-changing part is a moving part of the magnetic flux path.
10. The method as defined in claim 9 wherein the components, features and characteristics are provided such that the magnitude of:
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
11. The method as defined in claim 9 wherein the ratio of N1/N2 increases substantially when N2 is increased by further increasing N1.
12. The method as defined in claim 9 for use in association with the generator which further has an alternating current superimposed on an excitation current in the excitation coil which has an effect of reducing current passing through the load coils, the method further comprising reducing the effect of the alternating current.
13. The method as defined in claim 12 wherein the effect of the alternating current is reduced by inserting in the excitation coil a reducing circuit.
14. The method as defined in claim 13 wherein the reducing circuit comprises:
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
15. The method as defined in claim 14 wherein the comparator means and the reducing means are comprised of logic and thyristor circuits.
16. The method of claim 12 wherein the effect of the alternating current is reduced by providing a common d.c. supply to excite the first generator and to excite a second generator, wherein the second generator is either:
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
17. A method as defined in claim 1 wherein the reluctance-changing part is a rotor of the magnetic flux path.
18. The method as defined in claim 17 wherein the components, features and characteristics are provided such that the magnitude of:
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
19. The method as defined in claim 17 wherein the ratio of N1/N2 increases substantially when N2 is increased by further increasing N1.
20. The method as defined in claim 17 for use in association with the generator which further has an alternating current superimposed on an excitation current in the excitation coil which has an effect of reducing current passing through the load coils, the method further comprising reducing the effect of the alternating current.
21. The method as defined in claim 20 wherein the effect of the alternating current is reduced by inserting in the excitation coil a reducing circuit.
22. The method as defined in claim 21 wherein the reducing circuit comprises:
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
23. The method as defined in claim 22 wherein the comparator means and the reducing means are comprised of logic and thyristor circuits.
24. The method of claim 20 wherein the effect of the alternating current is reduced by providing a common d.c. supply to excite the first generator and to excite a second generator, wherein the second generator is either:
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
25. A method as defined in claim 1 wherein the reluctance-changing part is a second magnetic flux path having a portion common to the first magnetic flux path and wherein the common portion is periodically magnetically saturated.
26. The method as defined in claim 25 wherein the components, features and characteristics are provided such that the magnitude of:
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
approaches zero by increasing the product N2 w by increasing the number of turns N2 and/or w, or both, and the ratio of N1/N2 does not decrease substantially.
27. The method as defined in claim 25 wherein the ratio of N1/N2 increases substantially when N2 is increased by further increasing N1.
28. The method as defined in claim 25 for use in association with the generator which further has an alternating current superimposed on an excitation current in the excitation coil which has an effect of reducing current passing through the load coils, the method further comprising reducing the effect of the alternating current.
29. The method as defined in claim 28 wherein the effect of the alternating current is reduced by inserting in the excitation coil a reducing circuit.
30. The method as defined in claim 29 wherein the reducing circuit comprises:
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
(a) comparator means for comparing varying amplitude of the excitation current to an amplitude of a d.c. current;
and (b) reduction means for reducing the difference between the varying amplitude of the excitation current and the amplitude of the d.c. current.
31. The method as defined in claim 30 wherein the comparator means and the reducing means are comprised of logic and thyristor circuits.
32. The method of claim 28 wherein the effect of the alternating current is reduced by providing a common d.c. supply to excite the first generator and to excite a second generator, wherein the second generator is either:
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
(a) constructed together with the first generator having a common stator or rotor; or (b) constructed separately from the first generator and substantially identical to the first generator.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2034163 CA2034163A1 (en) | 1991-01-15 | 1991-01-15 | Method of increasing the efficiency of an electrical generator (combination slis/e-slis) |
| AU11632/92A AU1163292A (en) | 1991-01-15 | 1992-01-15 | Method of increasing the efficiency of an electrical generator |
| PCT/GB1992/000086 WO1992013383A1 (en) | 1991-01-15 | 1992-01-15 | Method of increasing the efficiency of an electrical generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2034163 CA2034163A1 (en) | 1991-01-15 | 1991-01-15 | Method of increasing the efficiency of an electrical generator (combination slis/e-slis) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2034163A1 true CA2034163A1 (en) | 1992-07-16 |
Family
ID=4146835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2034163 Abandoned CA2034163A1 (en) | 1991-01-15 | 1991-01-15 | Method of increasing the efficiency of an electrical generator (combination slis/e-slis) |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1163292A (en) |
| CA (1) | CA2034163A1 (en) |
| WO (1) | WO1992013383A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2191571B1 (en) * | 2002-02-28 | 2005-02-01 | Abraham Conde Mendez | ELECTRICAL POWER GENERATOR. |
| WO2009021381A1 (en) * | 2007-08-15 | 2009-02-19 | Chin-I Chang | A power generation structure of a generator |
| DE102009031205A1 (en) | 2009-07-01 | 2011-01-05 | Reinhold Johannes Gorzellik | Driving machine for use as rotating system, has electromagnets and permanent magnets, where heavy working medium-form part and cylindrical wheel-drum are designed, and support structure is provided with height-balancing machine feet |
| DE102009034343A1 (en) | 2009-07-23 | 2011-02-03 | Reinhold Johannes Gorzellik | Prime mover for obtaining electricity, has supporting structure provided with height-adjusting machine bases, where individually designed electronic control systems are utilized for all operations in system of prime mover |
| ES2375984B2 (en) | 2009-11-11 | 2013-01-28 | Abrahán Conde Méndez | MULTIGENERATOR OF ELECTRICAL ENERGY. |
| WO2012093951A2 (en) * | 2011-01-03 | 2012-07-12 | Tudor-Frunza Florin-Eugen | Polyphase electric generator with switched reluctance |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE647241C (en) * | 1937-06-30 | Lorenz Akt Ges C | Multi-frequency machine | |
| US1488975A (en) * | 1921-04-25 | 1924-04-01 | Brown Phelps | Magneto |
| US1812202A (en) * | 1928-06-20 | 1931-06-30 | Union Switch & Signal Co | Electrical translating apparatus |
| DE755900C (en) * | 1939-08-10 | 1953-09-07 | Siemens App | Alternating current generator with fixed inducing and induced system as well as a rotating rotor provided with power line guides, especially for measuring magnetic fields |
| US2228731A (en) * | 1939-12-06 | 1941-01-14 | Merlin L Pugh | Transformer control system |
| US2825869A (en) * | 1955-04-07 | 1958-03-04 | Sperry Rand Corp | Bi-toroidal transverse magnetic amplifier with core structure providing highest symmetry and a closed magnetic path |
| US3087108A (en) * | 1957-01-03 | 1963-04-23 | Dominic S Toffolo | Flux switching transformer |
| US3912958A (en) * | 1974-07-26 | 1975-10-14 | Us Navy | Flux-switched inductor alternator |
| US4835431A (en) * | 1987-12-04 | 1989-05-30 | Lindgren Theodore D | Transformer and synchronous machine with stationary field winding |
-
1991
- 1991-01-15 CA CA 2034163 patent/CA2034163A1/en not_active Abandoned
-
1992
- 1992-01-15 AU AU11632/92A patent/AU1163292A/en not_active Abandoned
- 1992-01-15 WO PCT/GB1992/000086 patent/WO1992013383A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1992013383A1 (en) | 1992-08-06 |
| AU1163292A (en) | 1992-08-27 |
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