CN109412282B - Multiphase fault-tolerant permanent magnet motor - Google Patents
Multiphase fault-tolerant permanent magnet motor Download PDFInfo
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- CN109412282B CN109412282B CN201811281184.8A CN201811281184A CN109412282B CN 109412282 B CN109412282 B CN 109412282B CN 201811281184 A CN201811281184 A CN 201811281184A CN 109412282 B CN109412282 B CN 109412282B
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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
- H02K1/148—Sectional cores
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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
- H02K1/17—Stator cores with permanent magnets
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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
- H02K1/22—Rotating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/125—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets having an annular armature coil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Synchronous Machinery (AREA)
Abstract
A multiphase fault-tolerant permanent magnet motor belongs to the technical field of special motors and comprises a shell, a permanent magnet, a stator core, an armature winding, a fan-shaped core, a rotor core frame and a shaft; the stator iron core is divided into 7X sub-iron cores which are mutually divided, the 7X sub-iron cores are uniformly arranged into a circle, and X is a positive integer; the rotor core frame is provided with 6X uniformly distributed fan-shaped grooves, and a rack-shaped groove radially extends from the bottom of each fan-shaped groove; 6X fan-shaped iron cores are fixed in the fan-shaped slots of the rotor iron core frame, and the middle tail of each fan-shaped iron core continues to extend outwards to form a rack-shaped iron core protrusion which is clamped on the rotor iron core frame; a permanent magnet is clamped between the two stator poles to form a pair of stator cores, and the two stator poles on the pair of stator cores are parallel; the motor provided by the invention is provided with the independent stator sub-cores, the windings are mutually isolated, the fault propagation can be effectively prevented, and the motor fault can be isolated by adopting a novel stator structure, so that the motor can still stably run under the condition of local fault.
Description
Technical Field
The invention relates to a multiphase fault-tolerant permanent magnet motor, and belongs to the field of special motors.
Background
As is known, the complex driving conditions of automobiles lead to the need of strong fault tolerance for the parts used in automobiles, and especially, the key equipment such as the automobile motor needs to have strong fault tolerance. It is conceivable that sudden failure of the motor of an electric vehicle running at high speed would inevitably have very serious consequences. The multi-phase permanent magnet motor has the advantages of both the multi-phase motor and the permanent magnet motor, and is high in torque density, large in design freedom and strong in fault-tolerant operation capability. Therefore, the multiphase permanent magnet motor becomes a research hotspot, and the strength of the fault-tolerant performance of the multiphase permanent magnet motor becomes an important basis for checking the quality of the multiphase permanent magnet motor.
Of the presently disclosed technologies, only a few are concerned with the study of multi-phase motors, and most of them are concerned with their control. In the close patent, the grant numbers are: patent application for invention of ZL 201410011535.9: a high-reliability four-phase AC starting generator features that concentrated windings are installed to its stator poles, n stator coils in adjacent phases are serially connected to form a phase, and the four-phase stator windings are sequentially connected end to end in ring mode and then respectively connected to the middle points of four-phase bridge arms.
The torque ripple of the motor can be effectively reduced by increasing the number of motor phases and increasing the number of motor phases, so that the number of the motor phases is more than three. In the multiphase motor, there are related applications mainly having application numbers: 201410011535.9 patent application for invention: a high-reliability four-phase AC starting generator comprises an end cover, a stator, a bearing, a magnet yoke, an excitation winding, a position sensor and a rotor consisting of a shaft and claw poles. Concentrated windings are installed on stator poles, n stator coils of adjacent phases are connected in series to form one phase, and four-phase stator windings are sequentially connected end to end in an annular mode and then connected to the middle points of four-phase bridge arms respectively. The motor adopts four-phase concentrated stator windings, has high reliability, can be used as a generator and a motor, but has obvious difference in stator structure, rotor structure and working principle.
The invention provides a multiphase fault-tolerant permanent magnet motor, wherein a stator iron core consists of 7X sub iron cores which are mutually divided, each sub iron core is provided with two stator poles, a permanent magnet is clamped between the two stator iron cores of the permanent magnet motor, a centralized armature winding is wound on each stator pole, the armature windings of the two poles on the same stator iron core are opposite in winding direction and same in phase, each armature winding in the circumferential direction is divided into seven phases according to different phases, and the seven-phase armature windings are completely isolated by the independent stator iron cores to limit the structure of fault propagation. . The multiphase fault-tolerant permanent magnet motor can be used as a generator and a motor.
At present, the applicant does not search the technology related to the invention through domestic and foreign search.
Disclosure of Invention
The invention provides a multiphase strong fault-tolerant permanent magnet motor aiming at the defects of poor reliability, difficult maintenance, low efficiency and the like of the motor for the automobile at present.
The invention adopts the following technical scheme:
a multiphase strong fault-tolerant permanent magnet motor is characterized in that:
the permanent magnet motor comprises a shell, a permanent magnet, a stator iron core, an armature winding, a fan-shaped iron core, a rotor iron core frame and a shaft;
the shell is made of a circular non-magnetic material, and a stator core is fixed inside the shell;
the long-strip-shaped stator pole is fixed in the shell, and a salient pole type stator pole is arranged on the inner side of the stator pole; a permanent magnet is clamped between the two stator poles to form a pair of stator cores, and the two stator poles on the pair of stator cores are parallel; the rotor iron core frame is positioned at the inner side of the stator iron core and can rotate around a shaft;
the stator iron core is divided into 7X sub-iron cores which are mutually divided, the 7X sub-iron cores are uniformly arranged into a circle, and X is a positive integer;
the rotor core frame is provided with 6X uniformly distributed fan-shaped grooves, the bottom of each fan-shaped groove is provided with a fixing groove along the radial direction, and two sides of each fixing groove are in a sawtooth shape;
6X fan-shaped iron cores are fixed in the fan-shaped slots of the rotor iron core frame, and a protrusion with a sawtooth-shaped edge extends outwards from the tail of each fan-shaped iron core and is clamped in the fixing slot of the rotor iron core frame;
the total arc length of the pair of stator cores is equal to the arc length of the outer circle of the fan-shaped core;
armature windings on two stator poles on one stator core are opposite in winding direction and same in phase, and are centralized windings.
The multiphase fault-tolerant permanent magnet motor is characterized in that:
each armature winding along the circumferential direction can be sequentially divided into an A-phase armature winding, a B-phase armature winding, a C-phase armature winding, a D-phase armature winding, an E-phase armature winding, an F-phase armature winding and a G-phase armature winding according to the difference of phases;
the multiphase fault-tolerant permanent magnet motor is characterized in that:
the permanent magnets are made of AlNiCo permanent magnet materials, and all the permanent magnets are magnetized in the same direction, or the adjacent permanent magnets are magnetized in opposite directions.
The multiphase fault-tolerant permanent magnet motor is characterized in that:
the multiphase fault-tolerant permanent magnet motor can be operated as a generator and a motor.
The multiphase fault-tolerant permanent magnet motor is characterized in that:
the seven-phase armature windings are respectively connected with a seven-phase full bridge rectifier.
The invention has the following beneficial effects:
the permanent magnet of the multiphase fault-tolerant permanent magnet motor is positioned on a stator, so that the heat dissipation of the motor is facilitated, the structure is simple, and the reliability is high;
the permanent magnet motor is provided with seven-phase windings, and when one phase of the motor windings fails, the rest phases can continue to operate;
the multiphase fault-tolerant permanent magnet motor adopts a novel stator structure, so that the motor fault can be isolated, and the motor can still stably run under the condition of local fault;
the technology has the advantages that the magnetic chain path of each winding is short, the iron core loss is small, and the weight is small;
the fan-shaped iron core progressive magnetic conduction can change the square wave back electromotive force of the traditional reluctance motor into an approximate sine wave, and reduce harmonic waves and pulsation.
Drawings
Fig. 1 is a schematic cross-sectional structural diagram of a multiphase fault-tolerant permanent magnet motor with X =2 in the invention. Wherein: 1. the motor comprises a shell, 2, a permanent magnet, 3, a stator core, 4, an armature winding, 5, a fan-shaped core, 6, a rotor core frame and 7 shafts.
Fig. 2 shows the case of the maximum flux linkage of a multiphase fault tolerant permanent magnet machine of X =2 according to the invention. Wherein: 2. permanent magnet, 3, stator core, 5, magnetic conduction rotor core.
Fig. 3 is a circuit diagram of a multiphase fault tolerant permanent magnet motor rectifier bridge of the present invention with X = 2.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic cross-sectional structural diagram of a multiphase fault-tolerant permanent magnet motor with X =2 in the invention. The multiphase fault-tolerant permanent magnet motor comprises a shell 1, a permanent magnet 2, a stator core 3, an armature winding 4, a fan-shaped core 5, a rotor core frame 6 and a shaft 7;
the shell 1 is made of a circular non-magnetic material, and a stator core 3 is fixed inside the shell;
the strip-shaped stator pole is fixed in the shell, and the inner side of the stator pole is provided with a convex stator pole;
a permanent magnet 2 is clamped between the two stator poles to form a pair of stator iron cores 3, and the two stator poles on the pair of stator iron cores 3 are parallel; the rotor iron core frame is positioned at the inner side of the stator iron core 3 and can rotate around a shaft 7;
the stator core 3 is divided into 14 sub-cores which are mutually divided, and the 14 sub-cores are uniformly arranged into a circle;
the rotor core frame 6 is provided with 12 uniformly distributed fan-shaped grooves, and the bottoms of the fan-shaped grooves radially extend to form a fixed groove with sawtooth-shaped edges on two sides;
12 fan-shaped iron cores 5 are fixed in fan-shaped slots of a rotor iron core frame 6, and the middle tail of each fan-shaped iron core 5 continues to extend outwards to form a protrusion with saw-tooth-shaped edges at two sides and is clamped in a fixing slot of the rotor iron core frame 6;
the armature windings 4 on the two stator poles on one stator core are opposite in winding direction and same in phase, and are both concentrated windings.
The multiphase fault-tolerant permanent magnet motor is characterized in that:
each armature winding 4 along the circumferential direction can be sequentially divided into an A-phase armature winding, a B-phase armature winding, a C-phase armature winding, a D-phase armature winding, an E-phase armature winding, an F-phase armature winding and a G-phase armature winding according to the difference of phases;
the multiphase fault-tolerant permanent magnet motor is characterized in that:
the permanent magnets 2 are made of AlNiCo permanent magnet materials, and all the permanent magnets 2 are magnetized in the same direction, or the adjacent permanent magnets 2 are magnetized in opposite directions.
The multiphase fault-tolerant permanent magnet motor is characterized in that:
the multiphase fault-tolerant permanent magnet motor can be operated as a generator and a motor.
The multiphase fault-tolerant permanent magnet motor is characterized in that:
the seven-phase armature windings are respectively connected with a seven-phase full bridge rectifier.
Fig. 2 shows the maximum flux linkage of a multiphase fault tolerant permanent magnet machine of X =2 according to the invention. As shown in the drawing, when the segmental core 5 of the motor is rotated to the position in the drawing, that is, when the two stator poles of the pair of stator cores 3 are aligned with the segmental core 5, the flux linkage path curve is shortest and the flux linkage of the armature winding wound around the stator core 3 is largest.
Fig. 3 is a circuit diagram of a rectifier bridge of a multiphase fault-tolerant permanent magnet motor of the present invention with X = 2. The seven-phase armature windings 4 are respectively connected with seven bridge arm middle points in a seven-phase full bridge rectifier.
The working principle of the multiphase fault-tolerant permanent magnet motor provided by the invention is explained below.
The multiphase fault-tolerant permanent magnet motor drives the rotor to rotate through the rotation of the shaft, and the permanent magnet generates a radial magnetic field at the moment. The permanent magnetic field on the stator iron core sub-iron core sequentially passes through a stator pole, an air gap, a rotor pole, a rotor iron core, another adjacent rotor pole, the air gap, another stator pole of the stator iron core, and a stator yoke part on the sub-iron core, and finally returns to the initial stator pole to form a closed magnetic circuit. As the rotor rotates, the rotation of the salient rotor poles causes a change in the flux linkage, inducing an electrical potential in a phase of armature windings on the stator core. Each armature winding of the multiphase fault-tolerant permanent magnet motor is divided into seven phases according to different phases, each phase of armature winding works independently, and even if one phase of armature winding fails, the other six phases of armature winding can work normally.
Claims (5)
1. A multiphase fault-tolerant permanent magnet motor is characterized in that:
the permanent magnet motor comprises a shell, a permanent magnet, a stator iron core, an armature winding, a fan-shaped iron core, a rotor iron core frame and a shaft;
the shell is made of a circular non-magnetic material, and a stator core is fixed inside the shell;
the long-strip-shaped stator pole is fixed in the shell, and a salient pole type stator pole is arranged on the inner side of the stator pole; a permanent magnet is clamped between the two stator poles to form a pair of stator cores, and the two stator poles on the pair of stator cores are parallel; the rotor iron core frame is positioned at the inner side of the stator iron core and can rotate around a shaft;
the stator iron core is divided into 7X sub-iron cores which are mutually divided, the 7X sub-iron cores are uniformly arranged into a circle, and X is a positive integer;
the rotor core frame is provided with 6X uniformly distributed fan-shaped grooves, the bottoms of the fan-shaped grooves are recessed into a fixed groove along the radial direction, and two sides of the fixed groove are in a sawtooth shape;
6X fan-shaped iron cores are fixed in the fan-shaped slots of the rotor iron core frame, and a protrusion with a sawtooth-shaped edge extends outwards from the tail of each fan-shaped iron core and is clamped in the fixing slot of the rotor iron core frame;
the total arc length of the pair of stator cores is equal to the arc length of the outer circle of the fan-shaped core;
armature windings on two stator poles on the pair of stator cores are opposite in winding direction and same in phase, and are centralized windings.
2. A multi-phase fault tolerant permanent magnet machine according to claim 1, characterized in that:
each armature winding along the circumferential direction is sequentially divided into an A-phase armature winding, a B-phase armature winding, a C-phase armature winding, a D-phase armature winding, an E-phase armature winding, an F-phase armature winding and a G-phase armature winding according to the difference of phases.
3. A multi-phase fault tolerant permanent magnet machine according to claim 1, characterized in that:
the permanent magnets are made of AlNiCo permanent magnet materials, and all the permanent magnets are magnetized in the same direction, or the adjacent permanent magnets are magnetized in opposite directions.
4. A multi-phase fault tolerant permanent magnet machine according to claim 1, characterized in that:
the multiphase fault tolerant permanent magnet motor can be operated as a generator and a motor.
5. A multi-phase fault tolerant permanent magnet machine according to claim 2, characterized in that:
the seven-phase armature winding is connected with a seven-phase full bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281184.8A CN109412282B (en) | 2018-10-31 | 2018-10-31 | Multiphase fault-tolerant permanent magnet motor |
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| CN201811281184.8A CN109412282B (en) | 2018-10-31 | 2018-10-31 | Multiphase fault-tolerant permanent magnet motor |
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| CN109412282A CN109412282A (en) | 2019-03-01 |
| CN109412282B true CN109412282B (en) | 2021-04-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111478543A (en) * | 2020-05-26 | 2020-07-31 | 山东理工大学 | Electric generator with low harmonic content for electric automobile |
| CN112671122B (en) * | 2020-12-31 | 2022-11-25 | 山东理工大学 | Stator and rotor block permanent magnet motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000050610A (en) * | 1998-07-30 | 2000-02-18 | Fuji Elelctrochem Co Ltd | Permanent magnet mounted stepping motor |
| CN2731815Y (en) * | 2004-10-10 | 2005-10-05 | 东南大学 | Wide speed regulating, double salient pole mixed exciting brushless dynamo |
| CN101359845A (en) * | 2008-08-29 | 2009-02-04 | 南京航空航天大学 | Electrode decoupling type electric exciting double cam motor with 6*k / 4*N*k construction |
| CN101741151A (en) * | 2008-11-15 | 2010-06-16 | 张玉宝 | Short magnetic circuit reluctance motor, and double stator magnetic poles, rotor core and wound rotor |
| CN101610007B (en) * | 2009-07-15 | 2011-08-10 | 南京航空航天大学 | 3-phase 12/11 pole permanent-magnetic-switch flux linkage motor and method for inhibiting short circuit current thereof |
| CN101710775A (en) * | 2009-12-16 | 2010-05-19 | 南京航空航天大学 | Hybrid excitation block type stator and rotor switch reluctance machine |
| CN103248158A (en) * | 2013-05-10 | 2013-08-14 | 东南大学 | Six-phase flux switching type permanent magnet motor |
| CN104218763B (en) * | 2014-07-08 | 2017-04-12 | 哈尔滨工业大学 | Multi-phase reluctance machine |
| CN104821697A (en) * | 2015-04-29 | 2015-08-05 | 江苏大学 | Fault-tolerant type four-phase switch reluctance motor used for driving of electric automobile |
| CN104967230B (en) * | 2015-06-18 | 2018-06-15 | 河海大学常州校区 | A kind of combined type double-convex pole hybrid excitation motor of asymmetric and winding configuration |
| CN106655688B (en) * | 2017-01-14 | 2019-01-15 | 山东理工大学 | A kind of reluctance motor that edge effect offsets each other |
| CN107070014A (en) * | 2017-05-08 | 2017-08-18 | 史立伟 | A kind of composite excitation servomotor |
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