CN110994817A - Six-phase magnetic flux switching motor capable of running at high speed - Google Patents
Six-phase magnetic flux switching motor capable of running at high speed Download PDFInfo
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- CN110994817A CN110994817A CN201911174673.8A CN201911174673A CN110994817A CN 110994817 A CN110994817 A CN 110994817A CN 201911174673 A CN201911174673 A CN 201911174673A CN 110994817 A CN110994817 A CN 110994817A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
- H02K1/246—Variable reluctance rotors
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- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a six-phase flux switching motor capable of running at high speed, which comprises: the bearing is positioned in the center, the bearing is sleeved with the rotor, and the stator is sleeved outside the rotor; the rotor is circumferentially provided with magnetic conduction areas and non-magnetic conduction areas at intervals, and the magnetic conduction areas form salient magnetic poles of the rotor; a plurality of stator teeth are arranged on the inner wall of the stator at intervals, a stator slot is formed between every two adjacent stator teeth, and a winding is arranged in the stator slot and wound on the stator teeth; and in the rotating process of the rotor, the salient magnetic poles of the rotor are sequentially contacted with the winding. According to the invention, the silicon steel sheet material of the circular rotor is changed into the double-phase silicon steel sheet through the nitriding process, and a magnetic conduction area and a non-magnetic conduction area are formed, so that the high-speed operation of the rotor is ensured, and the function of a magnetic flux switching motor is realized; the rotor is circular, so that the wind mill loss is small, and the internal stress of the rotor is small; the motor has simple structure and high reliability.
Description
Technical Field
The invention belongs to the technical field of motors, and relates to a six-phase flux switching motor capable of running at a high speed.
Background
The flux switching permanent magnet motor is a stator permanent magnet brushless motor with a novel structure, the stator and the rotor are of a double-salient structure, and the flux switching permanent magnet motor not only has the advantages of high efficiency, high power density and the like of a traditional rotor permanent magnet motor, but also has the advantages of simple rotor structure, high-speed operation, convenience in cooling and the like. Compared with the traditional three-phase motor system, the multi-phase motor system has the advantages of small torque pulsation, high reliability, more suitability for a high-power transmission system and the like.
However, when the flux switching permanent magnet motor rotates at a high speed, the salient pole rotor generates huge wind power, so that the wind abrasion loss of the flux switching permanent magnet motor is increased, the internal stress of the rotor is increased, and the working efficiency of the motor and the service life of the rotor are affected.
At present, magnetic flux switching type motors are various in type, and mainly include:
the flux switching motor is of an axial magnetic field type: the motor comprises 2 salient pole stators and 1 salient pole rotor, wherein the stators comprise stator fixing discs, stator modules, main windings and auxiliary windings; each stator module comprises a 2U stator core with a magnetic bridge and 1 permanent magnet, a main winding and an auxiliary winding respectively form a three-phase winding, and each phase winding adopts an independent H-bridge topological structure to supply power; the stator module isolation groove and the stator fixing disc together provide a space for placing the auxiliary winding; the rotor consists of a non-magnetic conductive ring and rotor poles uniformly arranged on the outer circumference of the non-magnetic conductive ring, and is provided with neither permanent magnets nor coils.
Typical flux switching machines: the patent CN203312947U discloses a six-phase magnetic flux switching permanent magnet motor, which introduces that a stator adopts a permanent magnet double-salient structure, permanent magnets, a stator core and an armature winding are all arranged in the stator, the stator core is formed by assembling a U-shaped magnetic conductive iron core and permanent magnets embedded between the magnetic conductive iron cores, and the permanent magnets are all alternately magnetized in a tangential direction; the armature winding is a six-phase armature winding arranged in the stator, the six-phase armature winding adopts centralized coils and is uniformly distributed on the circumference of the stator, each armature coil is wound in armature slots on the left side and the right side of a stator core unit formed by clamping two U-shaped magnetic conductive cores and a permanent magnet in the middle in a crossing manner, and armature coils of different phases are arranged in each armature slot in parallel; the rotor is made of a magnetic conductive material; the magnetizing directions of the permanent magnets are tangential to the circumference of the stator, and the magnetizing directions of two adjacent permanent magnets are opposite; the armature coil and the stator slot number are even generation numbers of phase numbers; the six-phase armature winding is divided into two sets of three-phase windings which are symmetrically distributed and are redundant, and the two sets of three-phase windings independently supply power or generate power.
At present, most of magnetic flux switching motors are of double-salient-pole structures, namely, the stator and the rotor are of salient magnetic pole structures, so that the wind mill loss of the motor is increased when the motor runs at a high speed or a super high speed, the efficiency is reduced, the vibration noise problem is further aggravated, the internal stress of the rotor is increased, and the service life is correspondingly reduced.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: the six-phase magnetic flux switching motor capable of running at high speed is provided, and is suitable for high-speed or ultrahigh-speed running environments, meanwhile, wind mill loss and vibration noise are reduced, efficiency is improved, and service life is prolonged.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a six-phase flux switching motor capable of high-speed operation, comprising: the bearing 5 is positioned in the center, the rotor is sleeved on the bearing 5, and the stator is sleeved outside the rotor; the rotor is circumferentially provided with magnetic conduction regions 1-1 and non-magnetic conduction regions 1-2 at intervals, and the magnetic conduction regions 1-1 form salient magnetic poles of the rotor; a plurality of stator teeth 2-2 are arranged on the inner wall of the stator at intervals, a stator slot 2-1 is formed between every two adjacent stator teeth 2-2, and a winding is arranged in the stator slot 2-1 and wound on the stator teeth 2-2; and in the rotating process of the rotor, the salient magnetic poles of the rotor are sequentially contacted with the winding.
The stator is of a salient pole structure, and the number of stator teeth 2-2 is 12; 12 stator teeth 2-2 are uniformly arranged on the circumference, the difference between the teeth is 30 degrees, and the tooth widths are equal; and 12 stator slots are formed between every two adjacent stator teeth 2-2.
Permanent magnets are embedded in each stator tooth 2-2, the magnetizing directions of the permanent magnets are tangential to the circumference of the stator, and a total of 12 tangential permanent magnets alternately magnetized form magnetic field distribution.
The windings 3 are wound in the two adjacent stator slots 2-1 and then are sequentially distributed to form A, B, C three-phase windings in the six-phase windings, and the A, B, C three-phase windings are 120 degrees different from each other; and meanwhile, winding is carried out at the position of a stator slot 2-1 at the position 60 degrees different from the A-phase winding to form a D-phase winding, winding is carried out at the position of a stator slot 2-1 at the position 60 degrees different from the C-phase winding to form an E-phase winding, winding is carried out at the position of a stator slot 2-1 at the position 60 degrees different from the B-phase winding to form an F-phase winding, and the difference between the E, F two windings and the D-phase winding is 120 degrees, so that a A, B, C, D, E, F six-phase winding is formed.
The outer surface of the rotor is of a cylindrical structure, a rotor silicon steel sheet is processed into two parts, namely a magnetic conduction region and a non-magnetic conduction region through a nitriding process, the magnetic conduction region 1-1 is of a protruding magnetic pole structure, and the non-magnetic conduction region 1-2 and the magnetic conduction region 1-1 are distributed at intervals.
Wherein the nitriding process comprises an ion method, a gas method and a salt bath method.
The number of the teeth of the salient magnetic poles of the rotor magnetic conduction region 1-1 is 10; the 10 rotor teeth are evenly distributed on the circumference, the difference between the teeth is 36 degrees, and the tooth widths are equal.
The number of the stator teeth 2-2 is N times of 12, the number of the salient magnetic poles of the rotor magnetic conduction region 1-1 is N times of 10, and N is a natural number.
(III) advantageous effects
According to the six-phase flux switching motor capable of running at high speed, the silicon steel sheet material of the circular rotor is changed into the two-phase silicon steel sheet through the nitriding process, and a magnetic conduction area and a non-magnetic conduction area are formed, so that the high-speed running of the rotor is ensured, and the function of the flux switching motor is realized; the rotor is circular, so that the wind mill loss is small, and the internal stress of the rotor is small; the motor has simple structure and high reliability.
Drawings
Fig. 1 is a schematic view of an assembly of a six-phase flux switching motor of the present invention that is capable of high speed operation.
Fig. 2-1 and 2-2 are stator and winding distribution diagrams of a six-phase flux switching motor of the present invention that is operable at high speeds.
Fig. 3 is a schematic view of a rotor structure of a six-phase flux switching motor capable of high-speed operation according to the present invention.
Specifically, the magnetic bearing comprises a 1-1-magnetic conduction region, a 1-2-non-magnetic conduction region, a 2-1-stator slot, a 2-2-stator tooth, a 3-winding, a 4-1-N pole permanent magnet, a 4-2-S pole permanent magnet and a 5-bearing.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in fig. 1 to 3, the six-phase flux switching motor capable of operating at high speed according to the present invention includes a bearing 5 located at the center, a rotor is sleeved on the bearing 5, and a stator is sleeved outside the rotor; the rotor is circumferentially provided with magnetic conduction regions 1-1 and non-magnetic conduction regions 1-2 at intervals, and the magnetic conduction regions 1-1 form salient magnetic poles of the rotor; a plurality of stator teeth 2-2 are arranged on the inner wall of the stator at intervals, a stator slot 2-1 is formed between every two adjacent stator teeth 2-2, and a winding is arranged in the stator slot 2-1 and wound on the stator teeth 2-2; and in the rotating process of the rotor, the salient magnetic poles of the rotor are sequentially contacted with the winding.
As shown in fig. 2-1, the stator is of a salient pole structure, and the number of stator teeth 2-2 is 12; 12 stator teeth 2-2 are uniformly arranged on the circumference, the difference between the teeth is 30 degrees, and the tooth widths are equal; 12 stator slots are arranged between every two adjacent stator teeth 2-2; permanent magnets are embedded in each stator tooth 2-2, the magnetizing directions of the permanent magnets are tangential to the circumference of the stator, and a total of 12 tangential permanent magnets alternately magnetized form magnetic field distribution.
As shown in fig. 2-2, in order to obtain a 60 ° phase belt distribution of the stator and the winding of the six-phase flux switching motor capable of high-speed operation, in this example, the stator slot 2-1 is assumed to be 12 slots, the winding 3 is wound in two adjacent stator slots as viewed from the top and then sequentially distributed to fill the stator slot 2-1 with the winding, A, B, C three-phase windings among six-phase windings are formed, and A, B, C three-phase windings are different from each other by 120 °. And winding is carried out at the position of the stator slot 2-1 with the phase A winding difference of 60 degrees to form a phase D winding. Similarly, winding is carried out at the position of the stator slot 2-1 at the position 60 degrees different from the C-phase winding to form an E-phase winding, winding is carried out at the position of the stator slot 2-1 at the position 60 degrees different from the B-phase winding to form an F-phase winding, and E, F two windings and the D winding are 120 degrees different from each other to form a A, B, C, D, E, F six-phase winding.
As shown in fig. 3, the outer surface of the rotor is of a cylindrical structure, the rotor silicon steel sheet is processed into two parts, namely a magnetic conduction region and a non-magnetic conduction region, by a nitriding process, the magnetic conduction region 1-1 is of a salient magnetic pole structure, the non-magnetic conduction region is 1-2, and the magnetic conduction region and the non-magnetic conduction region form a rotor complete circle together.
Specifically, the nitriding treatment technology mainly comprises several methods such as an ion method, a gas method, a salt bath method and the like, the surface of a rotor silicon steel sheet is coated with a special material which is in a salient pole type shape, then through any nitriding treatment process, the internal structure of an uncoated area on the surface of the rotor is changed to form a non-magnetic conduction area, and the coated rotor area forms a salient pole type magnetic conduction area.
The number of the teeth of the salient magnetic poles of the rotor magnetic conduction region 1-1 is 10; the 10 rotor teeth are evenly distributed on the circumference, the difference between the teeth is 36 degrees, and the tooth widths are equal.
Besides 12 teeth of the stator and 10 teeth of the rotor, the number of the teeth of the motor can be N times of the number of the teeth of the stator (where N is a natural number), that is, the number of the teeth of the stator is 24, 36, 48, etc., and the number of the teeth of the rotor is 20, 30, 40, etc.
When the rotor rotates and the magnetic flux linkage generated by the permanent magnet passes through the non-magnetic conductive area of the rotor, the magnetic resistance of the non-magnetic conductive area is large, so that a magnetic field is not easy to pass through, and the direction and the number of the rotor rotating magnetic flux linkage can not be greatly changed. When the flux linkage generated by the permanent magnet passes through the magnetic conduction area of the rotor, the direction and the quantity of the rotor rotation flux linkage can be changed along with the change, and the alternation of the positive and negative poles and the change of the numerical value are generated.
Compared with the structure of the double salient poles of most of flux switching motors, the rotor is a full circle, silicon steel sheet materials of the rotor are changed into double-phase silicon steel sheets through a nitriding process, the salient magnetic poles are two parts, namely a magnetic conduction area and a non-magnetic conduction area, so that the salient pole effect of the rotor is realized, and the flux switching motor can run at a high speed or a super high speed.
According to the six-phase flux switching motor capable of running at high speed, the wind abrasion loss of the outer circle of the rotor is obviously reduced at high speed, and the working efficiency of the motor is improved; the magnetic flux switching motor has small internal stress of the rotor when running at high speed, and the problem that the rotor with a salient pole type structure is damaged due to large internal stress when running at high speed is solved.
The existing magnetic flux switching motor is mostly of a double-salient-pole structure, so that the rotor generates large wind mill loss when running at high speed, and the internal stress of the rotor is correspondingly increased to influence the efficiency and the service life of the motor. The proposed rotor is processed by a nitriding process to process a round silicon steel sheet into a double-phase silicon steel sheet, and the implementation is simple. Compared with the prior art, the technical advantages of the proposal are embodied in the following aspects:
(1) simple structure and convenient production process.
(2) Compare in salient pole type rotor structure, the magnetic flux switching motor rotor of this application is the whole circle, and internal stress is little, and product life is longer.
(3) Compared with other magnetic flux switching motors, the six-phase magnetic flux switching motor capable of running at high speed can run at high speed or ultra-high speed, and is less in wind mill loss and higher in efficiency.
(4) The mechanical strength of the silicon steel sheet treated by the nitriding process is not weakened but increased.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A six-phase flux switching electric machine operable at high speeds, comprising: the bearing (5) is positioned in the center, the rotor is sleeved on the bearing (5), and the stator is sleeved outside the rotor; the rotor is circumferentially provided with magnetic conduction regions (1-1) and non-magnetic conduction regions (1-2) at intervals, and the magnetic conduction regions (1-1) form salient magnetic poles of the rotor; a plurality of stator teeth (2-2) are arranged on the inner wall of the stator at intervals, a stator slot (2-1) is formed between every two adjacent stator teeth (2-2), and a winding is arranged in the stator slot (2-1) and wound on the stator teeth (2-2); and in the rotating process of the rotor, the salient magnetic poles of the rotor are sequentially contacted with the winding.
2. The six-phase flux switching motor capable of high-speed operation according to claim 1, wherein the stator has a salient pole structure, and the number of stator teeth (2-2) is 12; 12 stator teeth (2-2) are uniformly arranged on the circumference, the difference between the teeth is 30 degrees, and the tooth widths are equal; and 12 stator slots are arranged between every two adjacent stator teeth (2-2).
3. The six-phase flux-switching electric machine with high speed operation according to claim 2, wherein permanent magnets are embedded in each of the stator teeth (2-2), the magnetization direction of the permanent magnets is tangential to the circumference of the stator, and a total of 12 tangential permanent magnets alternately magnetized form a magnetic field distribution.
4. A six-phase flux switching electric machine operable at high speed according to claim 3, wherein two adjacent said stator slots (2-1) are wound with the winding (3) and then distributed in sequence to form A, B, C three-phase windings among six-phase windings, A, B, C three-phase windings being different from each other by 120 °; and meanwhile, winding is carried out at the position of a stator slot (2-1) at the position 60 degrees different from the A-phase winding to form a D-phase winding, winding is carried out at the position of a stator slot (2-1) at the position 60 degrees different from the C-phase winding to form an E-phase winding, winding is carried out at the position of a stator slot (2-1) at the position 60 degrees different from the B-phase winding to form an F-phase winding, and E, F, the two windings and the D winding have 120 degrees different from each other to form a A, B, C, D, E, F six-phase winding.
5. The six-phase flux switching motor capable of operating at high speed according to claim 4, wherein the outer surface of the rotor is of a cylindrical structure, the rotor silicon steel sheet is processed into two parts, namely a magnetic conduction region and a non-magnetic conduction region through a nitriding process, the magnetic conduction region (1-1) is of a salient magnetic pole structure, and the non-magnetic conduction region (1-2) and the magnetic conduction region (1-1) are distributed at intervals.
6. The six-phase flux switching electric machine according to claim 5, wherein the nitriding process comprises an ion method, a gas method, a salt bath method.
7. Six-phase high-speed operable flux switching machine according to claim 5, wherein the number of salient poles of said rotor magnetically permeable region (1-1) is 10; the 10 rotor teeth are evenly distributed on the circumference, the difference between the teeth is 36 degrees, and the tooth widths are equal.
8. A six-phase flux switching machine capable of high-speed operation according to claim 1, wherein the number of stator teeth (2-2) is N times 12, the number of salient poles of the rotor magnetic conductive region (1-1) is N times 10, and N is a natural number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911174673.8A CN110994817A (en) | 2019-11-26 | 2019-11-26 | Six-phase magnetic flux switching motor capable of running at high speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911174673.8A CN110994817A (en) | 2019-11-26 | 2019-11-26 | Six-phase magnetic flux switching motor capable of running at high speed |
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| CN110994817A true CN110994817A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911174673.8A Pending CN110994817A (en) | 2019-11-26 | 2019-11-26 | Six-phase magnetic flux switching motor capable of running at high speed |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118406Y (en) * | 2007-11-08 | 2008-09-17 | 岳群生 | An asynchronous start permanent magnetic synchronous electromotor |
| CN203312947U (en) * | 2013-05-10 | 2013-11-27 | 东南大学 | Six-phase magnetic flux switching type permanent magnet motor |
| CN109194076A (en) * | 2018-10-31 | 2019-01-11 | 山东理工大学 | A kind of electric car high reliability driving motor |
| CN110165840A (en) * | 2018-02-13 | 2019-08-23 | 通用电气公司 | Engine and formation with magnetic part and the method using the magnetic part |
-
2019
- 2019-11-26 CN CN201911174673.8A patent/CN110994817A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118406Y (en) * | 2007-11-08 | 2008-09-17 | 岳群生 | An asynchronous start permanent magnetic synchronous electromotor |
| CN203312947U (en) * | 2013-05-10 | 2013-11-27 | 东南大学 | Six-phase magnetic flux switching type permanent magnet motor |
| CN110165840A (en) * | 2018-02-13 | 2019-08-23 | 通用电气公司 | Engine and formation with magnetic part and the method using the magnetic part |
| CN109194076A (en) * | 2018-10-31 | 2019-01-11 | 山东理工大学 | A kind of electric car high reliability driving motor |
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Application publication date: 20200410 |