CN1203601C - Permanent-megnet electric motor - Google Patents
Permanent-megnet electric motor Download PDFInfo
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- CN1203601C CN1203601C CN 99111294 CN99111294A CN1203601C CN 1203601 C CN1203601 C CN 1203601C CN 99111294 CN99111294 CN 99111294 CN 99111294 A CN99111294 A CN 99111294A CN 1203601 C CN1203601 C CN 1203601C
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Abstract
The present invention relates to a permanent magnet motor which is formed by combining a stator and a rotor. A three-phase winding is used by a stator coil, an embedded type permanent magnet is used by the rotor for composing a main pole, wherein the main pole is provided with a residual empty slot. When the permanent magnet motor is operated in a heavy load, demagnetizing effects of a magnetic field of armature reaction to a magnetic field of the main pole of the permanent magnet motor, which are produced by the energization of the stator coil, can be effectively lowered. The main pole is formed by adopting the embedded type permanent magnet with multiple side positions in a synthesis exciting mode, and thus, the running efficiency of the permanent magnet motor is enhanced.
Description
The present invention relates to a kind of permanent magnet motor, particularly relate to a kind of rotor, the permanent magnet motor that each main pole is to use embedded permanent magnet to constitute with a plurality of main poles.
The general permanent magnet motor that uses permanent magnet, when its operation rotating speed is required to improve, fly off for preventing that permanent magnet from causing in the high rotating speed rotation of rotor, the common mode that all permanent magnet can be sticked together by rotor outer surface, change into embedded assembling mode, so can be by the support force of silicon steel sheet, the centrifugal force that the opposing motor causes permanent magnet to fly off when high speed rotating.Motor rotor adopts the existing application examples of permanent magnet with embedded assembling mode, see also Figure 24 and shown in Figure 25, Figure 24 shows the structure of motor rotor 10, comprise motor spindle 101, permanent magnet 102 and four main poles 103, each main pole 103 all is that the permanent magnet 102 by single side position is constituted; Figure 25 also show have permanent magnet 202, the motor rotor 20 of motor spindle 201 and main pole 203.The employed structure of aforesaid existing application examples can make the operation rotating speed of motor be improved, and permanent magnet is still unlikely to be flown off.See also Figure 26 and shown in Figure 27, when motor need obtain maximum output torque, because the excitatory magnetic field that is constituted during the stator coil energization excitation, must constitute main pole face center line (be commonly referred to as d-axis (11) Direct-axis and also claim the d axle) with permanent magnet and keep the electrical angle of 90 degree (this orientation is commonly referred to as and hands over axle (12) Quadrature-axis also to claim the q axle), so if use the embedded assembling mode of Figure 24 and Figure 25, its main pole 103,203 (is each main pole permanent magnet 102, the 202 silicon steel sheet parts intermarginal outward) with rotor, one low magnetic resistance (Low reluctance) path is provided just, the excitatory magnetic field that this low reluctance path is constituted when making the stator coil energization excitation, to the sub-direction of rotation of the reverse of motor main pole permanent magnet partly, cause demagnetization (Demagnetization) effect (generally being commonly referred to as armature reaction Armature reaction).When motor also need be operated under heavy duty use situation, this armature reaction demagnetization effects will be more serious with the increase of stator coil electrical current; Armature reaction also causes the distortion in main pole magnetic field by the sub-direction of rotation of the reverse of main pole permanent magnet is partly caused demagnetization effects in addition.If the switching controls of this its stator coil electrical current of motor, be that the mode that adopts the rotor field to detect is carried out (as using Hall perceptron Hall effectsensor), armature reaction causes the distortion in main pole magnetic field, to cause the transfer (be generally to be offset to and reverse sub-direction of rotation) of rotor magnetic pole neutral axis (Neutral axis), make the switching controls sequential mistake of stator coil electrical current, and can't keep the excitatory magnetic field that the stator former coil electricity is constituted when excitatory, must constitute main pole face center line with permanent magnet and keep the relation of 90 degree electrical angles (being that exciting curent must be fixed in friendship axle (12)), cause the output torque of motor to reduce, and when motor is operated under heavy duty use situation, the output torque of motor then can't be with the increase of stator coil electrical current, and directly effectively increases.
So, aforementioned existing application examples, existence can't take into account the shortcoming of high rotating speed and heavy duty application simultaneously, main purpose of the present invention is to provide a kind of permanent magnet motor, make it can effectively utilize permanent magnet, improve the operating efficiency of motor, and can prevent that motor from causing permanent magnet to fly off simultaneously when high speed rotating, also can effectively alleviate the armature reaction demagnetization effects of motor when heavy duty is operated, so that the output torque of motor effectively increases.
The objective of the invention is to realize by following technical scheme.
Permanent magnet motor is that stator and the rotor by the punching out of silicon steel sheet institute combined, and the coil of its stator adopts three phase windings; Rotor then has a plurality of main poles, the formation of main pole is to adopt embedded sheet permanent magnet, wherein main pole is provided with a plurality of every the magnetic dead slot, can make motor when heavy duty is operated, the armature reacting field that is produced because of stator coil energising is able to effective reduction to the demagnetization effects in motor main pole magnetic field;
The purpose of this utility model can also further realize by following technical measures.
Aforesaid permanent magnet motor, wherein main pole is the separation fully of opening port every the magnetic dead slot every magnetic dead slot apical margin.
Aforesaid permanent magnet motor wherein saidly is filled with not magnetic conduction and non electrically conductive material every the magnetic dead slot.
Aforesaid permanent magnet motor, wherein said main pole is to be adopted by the embedded permanent magnet that the position, both sides is the angle state synthetic excitatoryly to constitute, the angle angle of position, both sides permanent magnet is between 90 degree～180 degree, and adjacent of permanent magnet is provided with middle dead slot.
Aforesaid permanent magnet motor, wherein said main pole are to be adopted by the embedded permanent magnet in three side positions synthetic excitatoryly to constitute dead slot in the middle of permanent adjacent of magnetic is provided with.
The utility model compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, the utility model the present invention compared with prior art has tangible advantage and good effect.
Main pole of the present invention is that the embedded permanent magnet of many sides position constitutes with synthetic excitation mode, can improve air gap flux density, and the running efficiency of motor is improved.Each main pole is provided with a plurality of every the magnetic dead slot, the armature reacting field side can be led and made it to concentrate on every the silicon steel sheet part of magnetic dead slot two end margins and the interior silicon steel sheet part between permanent magnet and axle, be parallel to the main pole permanent magnet at the demagnetizing field component that reverses sub-direction of rotation part magnetic field to reduce it, make motor when heavy duty is operated, still can not constitute too strong armature reaction demagnetizing field, excessively weaken with the intensity that does not make main pole magnetic field, to improve output torque and the operating efficiency of motor when heavy duty is operated; This external cause armature reacting field also causes the asymmetric distribution in motor main pole magnetic field, be that motor magnetic pole neutral axis (being the line of demarcation of N magnetic pole and S magnetic pole) causes skew, and this neutral axis deviation angle still changes formed different armature reacting field with the power of load and changes, make the output characteristic of motor cause change, when main pole is used a plurality of during every the magnetic dead slot, owing to suitably weaken the influence of armature reaction to main pole magnetic field, the motor heavy duty causes the skew of magnetic pole neutral axis angle, also reduce simultaneously, this is every the setting of magnetic dead slot in addition, still can reduce the rotary inertia of each main pole, make motor rotor when high speed rotating, reduce the centrifugal force that each main pole produces.Main pole is that the embedded permanent magnet of many sides position constitutes main pole with synthetic excitation mode, can obtain more only using single side position permanent magnet is strong main pole magnetic field, thereby can use magnetism characteristic and more weak grade permanent magnet, still can obtain suitable main pole magnetic field, can improve air gap flux density, the running efficiency of motor is improved, and dead slot in the middle of adjacent of permanent magnet is provided with is simultaneously synthesized the magnetizing flux of adjacent permanent.Finish separation every the magnetic dead slot every what the apical margin of magnetic dead slot can be arranged to opening port in addition, the low reluctance path (each main pole position) of the armature reacting field that can be complete be produced during the energising of blocking-up stator coil, and with the other interior silicon steel sheet part that is directed between permanent magnet and axle of the armature reacting field of major part, can more significantly reduce the demagnetizing field component that it is parallel to the main pole permanent magnet field, reduce to minimum to the influence in main pole magnetic field armature reaction, make motor when heavy duty is operated, main pole magnetic field when keeping near no-load operation when energization excitation (be stator coils of motor not), also more reduce the skew of magnetic pole neutral axis simultaneously, and obtain better output characteristic.In a word, the present invention compared with prior art has the following advantages:
1, use is a plurality of every magnetic dead slot or a plurality of the separation fully every the magnetic dead slot, can effectively lower of the influence of stator coil energization excitation magnetic field to main pole magnetic field, reduce it and be parallel to the main pole permanent magnet in reversing the partly demagnetizing field component in magnetic field of sub-direction of rotation, make motor when heavy duty is operated, still can not constitute too strong armature reaction demagnetizing field, the intensity in main pole magnetic field is excessively weakened, to improve output torque and the operating efficiency of motor when heavy duty is operated; Reduce the skew of motor simultaneously in the heavy duty operation magnetic pole neutral axis angle that causes.
2. motor of the present invention uses permanent magnet synthetic excitatory mode in many sides position to constitute main pole, can obtain more only using single side position permanent magnet is strong main pole magnetic field, thereby can use magnetism characteristic and more weak grade permanent magnet, still can obtain suitable main pole magnetic field.
3. use and separate fully when the magnetic dead slot, can reduce the slot effect of main pole magnetic field and stator silicon steel plate, the distribution of air gap flux density radial values that makes main pole magnetic field is near the string ripple, and so when motor operation, its torque of turning round can effectively reduce.
In sum, permanent magnet motor provided by the present invention meets high rotating speed, heavy duty high efficiency effect really, and a kind of novel permanent magnet motor that can effectively lower stator coils of motor energization excitation magnetic field armature reaction is provided.
Concrete structure of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Fig. 1 is the structure cutaway view of first embodiment of the invention.
Fig. 2 is a first embodiment of the invention in the stator coil magnetic flux distribution during energization excitation not.
Fig. 3 is a first embodiment of the invention not to be provided with every the magnetic dead slot and the stator coil magnetic flux distribution during energization excitation not.
Fig. 4 is the distribution and size of the air gap flux density radial values under Fig. 2 state.
Fig. 5 is the distribution and size of the air gap flux density radial values under Fig. 3 state.
Fig. 6 is the correct relation figure of first embodiment of the invention rotor-position and permanent magnet polarity when the stator coil energization excitation.
Fig. 7 be first embodiment of the invention so that permanent magnet not to be set the magnetic flux distribution during the stator coil energization excitation.
Fig. 8 be first embodiment of the invention be not provided with every the magnetic dead slot with permanent magnet is not set the magnetic flux distribution during the stator coil energization excitation.
Fig. 9 is the magnetic flux distribution of Fig. 2 when the stator coil energization excitation.
Figure 10 is the distribution and size of the air gap flux density radial values of Fig. 2 when the stator coil energization excitation.
Figure 11 is the magnetic flux distribution of Fig. 3 when the stator coil energization excitation.
Figure 12 is the distribution and size of the air gap flux density radial values of Fig. 3 when the stator coil energization excitation.
Figure 13 is an output torque comparison sheet.
Figure 14 is the variation structural plan figure of first embodiment of the invention.
Figure 15 is Figure 14 in the stator coil magnetic flux distribution during energization excitation not.
Figure 16 is Figure 14 in the not distribution and size of the air gap flux density radial values during energization excitation of stator coil.
Figure 17 is the magnetic flux distribution of Figure 14 when the stator coil energization excitation.
Figure 18 is the distribution and size of the air gap flux density radial values of Figure 14 when the stator coil energization excitation.
Figure 19 is an output torque comparison sheet.
Figure 20 is according to rotor profiles figure of the invention process.
Figure 21 is the profile of second embodiment of the invention.
Figure 22 is an output torque comparison sheet.
Figure 23 is the third embodiment of the invention section of structure.
Figure 24 is the rotor structure plane graph of existing motor.
Figure 25 is the rotor structure plane graph of another existing motor.
Figure 26 and Figure 27 are the electrical angle location diagrams of motor.
Below in conjunction with accompanying drawing and preferred embodiment, to the permanent magnet motor that foundation the present invention proposes, its concrete structure, feature and effect thereof, describe in detail as after.
Fig. 1 shows that permanent magnet motor of the present invention is that stator 3 by the punching out of silicon steel sheet institute is combined with rotor 5, its stator is provided with coil groove 31 and adopts three phase windings for coil, 5 of rotors have a plurality of main poles 51, each main pole adopts the synthetic excitation mode of angle to constitute by the permanent magnet 41,42 of position, both sides, dead slot 7 in the middle of adjacent of position, both sides permanent magnet is provided with, the setting of this centre dead slot 7 is synthesized with the magnetizing flux that does not produce leakage path and position, both sides permanent magnet 41,42.Each main pole 51 be provided with a plurality of be Boulez at interval every magnetic dead slot 510, see also Fig. 2 and shown in Figure 3, be respectively setting of the present invention and be not provided with every magnetic dead slot (510) and the stator coil magnetic flux distribution during energization excitation not.The material of permanent magnet that embodiment uses 41,42 is N33H neodymium iron boron (NdFeB) sintered magnet, its relict flux density (Br) is 1.05-1.17Tesla, inherent coercive force (iHc) is 1353kA/m, maximum magnetic energy product ((BH) max) is 32-34MGOe, and temperature coefficient is-0.58%/degreeC.Fig. 2 and Fig. 3 the two can make main pole 51 magnetic fluxs because of 510 isolated concentrating on every the silicon steel sheet of adjacent of magnetic dead slot partly every between the magnetic dead slot every being provided with of magnetic dead slot 510 more as can be known.Because motor main pole magnetic field directly influences (being d-axis magnetic field) to motor output torque tool, its variation can be learnt by the distribution and the big or small Direct observation of air gap flux density radial values.But see also Fig. 4 and Fig. 5 again, be respectively the distribution and size that are provided with and are not provided with its air gap flux density radial values when magnetic dead slot 510, there is no too big-difference and change as can be known.Therefore stator coil not energization excitation after the setting of magnetic dead slot 510 the whole magnetic circuit of motor is not impacted.Because armature reaction is to produce in stator coil energization excitation time side, every the setting of magnetic dead slot 510 whether its DISTRIBUTION OF MAGNETIC FIELD in the time of therefore can be by independent observation stator coil energization excitation is inquired into, to the influence of the whole magnetic circuit of motor.The correct relation of hot-wire coil and motor rotor 5 positions and permanent magnet 41,42 polarity so can satisfy the electrical angles that the motor rectangular axis is kept 90 degree as shown in Figure 6 during stator coils of motor energization excitation of the present invention, to obtain maximum output torque.The employed linear exciting curent density of embodiment (Linear current density) is 180 ampere-turns/cm, Fig. 7 and Fig. 8 for the present invention in the motor setting when not being provided with every magnetic dead slot 510, but permanent magnet (diagram shows permanent magnet location notch 400) all is not set and magnetic flux distribution during the stator coil energization excitation.Observing Fig. 8 can learn when not being provided with every the magnetic dead slot, the magnetic field that is constituted during the stator coils of motor energization excitation, almost completely with the low reluctance path between permanent magnet location notch 400 angles of position, both sides, as its path by motor rotor, this magnetic field is to directly reversing sub-direction of rotation partly to motor main pole permanent magnet, cause strong demagnetization effects, make the strength reduction in main pole magnetic field, and cause the asymmetric distribution in main pole magnetic field.Observing Fig. 7 once more can learn when being provided with every magnetic dead slot 510, the magnetic field that is constituted during for the stator coils of motor energization excitation, major avenues of approach between angle, its magnetic resistance raises because of the setting every magnetic dead slot 510, thereby most led and make it to concentrate on partly and permanent magnet 41 every the silicon steel sheet of magnetic dead slot two end margins by other, 42 and the interior silicon steel sheet of 6 of axles partly, because the silicon steel sheet every magnetic dead slot two end margins is partly quite narrow, only can pass through limited magnetic flux, the part magnetic flux that is constituted when forcing the stator coil energization excitation, still need with between permanent magnet and axle as path, so can effectively reduce of the influence of stator coil energization excitation magnetic field to main pole magnetic field, weaken this magnetic field motor main pole permanent magnet is reversed sub-direction of rotation demagnetization effects partly, reduce the torsional deformation that main pole magnetic field is caused simultaneously.When electric motor operated, its internal magnetic field is that the magnetic field that the magnetic field that constituted during by the stator coil energization excitation and rotor main pole permanent magnet are constituted is synthesized, therefore observe that motor is provided with permanent magnet 41,42 and magnetic flux distribution during the stator coil energization excitation, can straightforward armature reaction to the influence in main pole magnetic field.This influence also can be learnt by the distribution and the size of motor air gap magnetic flux density radial values.Fig. 9, Figure 10 and Figure 11, Figure 12 for the present invention in the distribution of magnetic flux distribution with it the corresponding air gap flux density radial values of motor setting when not being provided with every magnetic dead slot 510 and stator coil energization excitation with big or small.Can obviously observe and learn and be not provided with when magnetic dead slot 510, the torsional deformation in main pole magnetic field and main pole permanent magnet reverse sub-direction of rotation demagnetization effects partly; But when being provided with every magnetic dead slot 510, the torsional deformation in main pole magnetic field is improved, and also alleviates the main pole permanent magnet and reverses sub-direction of rotation demagnetization effects partly.Observe the distribution and size of air gap flux density radial values, also can learn that main pole obviously raises in reversing sub-direction of rotation air gap flux density radial values partly, and the also more complete symmetry in each main pole magnetic field; Because the distribution of illustrated air gap flux density radial values and size, its transverse axis is the air gap circumferential position partly of motor, starting point 100 is shown in Figure 6, the longitudinal axis is the size (its unit is Tesla) of air gap flux density radial values, when the air gap flux density radial values is zero, can equivalence be considered as motor magnetic pole neutral axis position, and observation Figure 10 and Figure 12 are provided with as can be known and are not provided with every magnetic dead slot 510, and during the stator coil energization excitation, its magnetic pole neutral axis 200 positions.When being provided with every the magnetic dead slot, near earlier figures 4 with shown in Figure 5, the place of its magnetic pole neutral axis when energization excitation not.Use is every the influence of 510 pairs of motor output of magnetic dead slot torque, can learn by Figure 13, when Figure 13 is the stator coils of motor energization excitation, be provided with and the output torque comparison sheet that is not provided with when the magnetic dead slot, by output torque comparison sheet as can be known, under aforesaid condition, the output torque that is not provided with when the magnetic dead slot shows 3.8N-m, the output torque of setting when the magnetic dead slot is 4.6N-m, and motor adds setting when the magnetic dead slot, and its output torque can increase by 20% approximately.See also Figure 14, the present invention separates structure every magnetic dead slot 520 fully every what the apical margin of magnetic dead slot formed opening port, cooperation with reference to Figure 20 adopt injection moulding will be not magnetic conduction and non electrically conductive material 8 fill in this and separate fully between magnetic dead slot 520 can be to rotor 5 silicon steel sheets consolidation force is provided, make the rotor silicon steel sheet become complete individuality.Figure 15 separates every magnetic dead slot 520 but the stator coil magnetic flux distribution during energization excitation not fully for the present invention is provided with in motor, and Figure 16 be that the distribution of its air gap flux density radial values is with big or small.Comprehensive observing Figure 15 and Figure 16 are as can be known, use and separate fully when magnetic dead slot 520, can reduce the slot effect of main pole magnetic field and stator silicon steel plate, (alleged slot effect is according to the configuration in the design between motor stator and rotor, the little tooth of standing shape and the groove of invaginated type are often arranged, if its configuration makes tooth aim at groove with tooth and groove, then can make motor produce a commentaries on classics, be called " slot effect ", painstakingly be provided with if wherein there is not tangible groove as above-mentioned every the magnetic dead slot, also can produce equivalent effect, be called " equivalent slot effect ", this case can be lowered equivalent slot effect with tooth and groove to criterion), compare with Fig. 4 and Fig. 5, the distribution of the air gap flux density radial values in main pole magnetic field is near string ripple (Sinusoidal wave), and so when motor operation, its cogging torque (Coggingtorque) can effectively reduce.Because being provided with to separate fully every magnetic dead slot 520, main pole 51 make the magnetic flux at this position be bordering on blocking-up fully, the most magnetic flux that is constituted during the stator coil energization excitation, can only be with the interior silicon steel sheet of 6 of permanent magnet 41,42 and axles partly as its path, so stator coil energization excitation magnetic field will significantly be lowered the influence in main pole magnetic field, and its effect can be learnt by Figure 17 and Figure 18.The torsional deformation in main pole magnetic field is extremely slight, and the distribution of its air gap flux density radial values and size are almost same as shown in Figure 16, be the distribution of an intimate symmetry, main pole is in reversing the only faint reduction of air gap flux density radial values (still having the denier excitatory magnetic field by main pole 51 parts) partly of sub-direction of rotation.As for the minimizing effect of neutral axis side-play amount, then because of stator coil energization excitation magnetic field still exists interior silicon steel sheet between permanent magnet and axle partly as its path, and be provided with when the magnetic dead slot approaching.Separate fully every magnetic dead slot 520 because it significantly lowers the influence of stator coil energization excitation magnetic field to main pole magnetic field, can observe its influence to motor output torque, its output torque is 5.8N-m as shown in figure 19, the output torque that is not provided with when the magnetic dead slot increases by 50% approximately, the output torque that is provided with when the magnetic dead slot increases by 26% approximately, the output characteristic of motor because of separating the setting every the magnetic dead slot fully, obtains significantly to improve.Figure 20 is rotor sectional drawing that the present invention implemented, wherein not magnetic conduction and non electrically conductive material 8 be filled in separate fully in magnetic dead slot 520.
Figure 21 is the application examples that is applied to the embedded Permanent Magnet motor of single side position every magnetic dead slot 510 of the present invention, each main pole 51 is provided with a plurality of every magnetic dead slot 510, because the magnetic field that is constituted during the stator coils of motor energization excitation is that low reluctance path with main pole 51 is as its path by motor rotor, sub-direction of rotation is directly reversed partly to motor main pole permanent magnet in this magnetic field, cause strong demagnetization effects, make the strength reduction in main pole magnetic field, and cause the asymmetric distribution in main pole magnetic field, the magnetic field that is constituted during therefore for the stator coils of motor energization excitation, the major avenues of approach of main pole 51, its magnetic resistance raises because of the setting every magnetic dead slot 510, thereby most led and make it to concentrate on partly every the silicon steel sheet of magnetic dead slot two end margins by other, because the silicon steel sheet every magnetic dead slot two end margins is partly quite narrow, only can pass through limited magnetic flux, the part magnetic flux that is constituted when forcing the stator coil energization excitation, still need interior silicon steel sheet with 6 of permanent magnet 43 and axles partly as path, so can effectively reduce of the influence of stator coil energization excitation magnetic field to main pole magnetic field, weaken this magnetic field motor main pole permanent magnet is reversed sub-direction of rotation demagnetization effects partly, reduce the torsional deformation that main pole magnetic field is caused simultaneously.Use is every the influence of magnetic dead slot to the embedded Permanent Magnet motor output torque of single side position, can learn by Figure 22, Figure 22 is contained when being single side position embedded Permanent Magnet motor stator coil energization excitation, be provided with and the output torque comparison sheet that is not provided with when the magnetic dead slot, employed linear exciting curent density (Linear current density) is 180 ampere-turns/cm, motor rotor stack thickness is 100mm, and exciting curent is fixed in hands over axle, and motor silicon steel sheet material is H23, and the permanent magnet material is N33H.By output torque comparison sheet as can be known, under aforesaid condition, the output torque that is not provided with when the magnetic dead slot is 3.6N-m, and the output torque that is provided with when the magnetic dead slot is 4.5N-m, the embedded Permanent Magnet motor in single side position adds when the magnetic dead slot, and its output torque can increase by 25% approximately.Figure 23 shows that permanent magnet motor rotor 5 adopts synthetic excitation mode with three side position permanent magnets 41,42,43 and constitute main pole, dead slot 7 in the middle of adjacent of main pole permanent magnet is provided with, and this kind three side position permanent magnets can obtain higher main pole magnetic field.As shown in the figure, each main pole 51 is provided with a plurality of every magnetic dead slot 510, low reluctance path with main pole 51 during for the stator coils of motor energization excitation is the magnetic field path, because of the setting every magnetic dead slot 510 promotes magnetic resistance, make it only can pass through limited magnetic flux, so can effectively reduce of the influence of stator coil energization excitation magnetic field to main pole magnetic field, weaken this magnetic field motor main pole permanent magnet is reversed sub-direction of rotation demagnetization effects partly, reduce the torsional deformation that main pole magnetic field is caused simultaneously.
Claims (4)
1, a kind of permanent magnet motor, combine by stator and rotor, its stator coil uses three phase windings, rotor then has a plurality of main poles, each main pole adopts embedded permanent magnet to constitute, it is characterized in that: main pole be provided be distributed in distance every the magnetic dead slot, should be every being provided with of magnetic dead slot be to aim at the tooth of stator, make rotor silicon steel sheet and stator silicon steel plate not produce equivalent slot effect and reduce cogging torque; And main pole is to be adopted by the embedded permanent magnet that the position, both sides is the angle state synthetic excitatoryly to constitute, and the angle angle of position, both sides permanent magnet is between between 90 degree and 180 degree, and adjacent of permanent magnet is provided with middle dead slot.
2, permanent magnet motor according to claim 1 is characterized in that: main pole is the separation fully of opening port every the magnetic dead slot every magnetic dead slot apical margin.
3, permanent magnet motor according to claim 2 is characterized in that: be filled with not magnetic conduction and non electrically conductive material every the magnetic dead slot.
4, permanent magnet motor according to claim 1 is characterized in that: main pole is to constitute dead slot in the middle of adjacent of permanent magnet is provided with by the embedded permanent magnet employing in three side positions is synthetic excitatory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99111294 CN1203601C (en) | 1999-08-06 | 1999-08-06 | Permanent-megnet electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99111294 CN1203601C (en) | 1999-08-06 | 1999-08-06 | Permanent-megnet electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1283889A CN1283889A (en) | 2001-02-14 |
| CN1203601C true CN1203601C (en) | 2005-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99111294 Expired - Fee Related CN1203601C (en) | 1999-08-06 | 1999-08-06 | Permanent-megnet electric motor |
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| Country | Link |
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| CN (1) | CN1203601C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315242C (en) * | 2002-12-17 | 2007-05-09 | 乐金电子(天津)电器有限公司 | Rotor core for brushless direct-current machine |
| CN107591917A (en) * | 2016-07-06 | 2018-01-16 | 大银微系统股份有限公司 | Permanent magnet motor |
| JP7128456B2 (en) * | 2017-01-16 | 2022-08-31 | 政行 梨木 | motor |
| TWI801840B (en) * | 2021-04-14 | 2023-05-11 | 東元電機股份有限公司 | Rotor structure with edge notches |
| KR20240047723A (en) * | 2022-10-05 | 2024-04-12 | 삼성전자주식회사 | Interior permanent magnet synchronous motor |
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1999
- 1999-08-06 CN CN 99111294 patent/CN1203601C/en not_active Expired - Fee Related
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| CN1283889A (en) | 2001-02-14 |
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