CN115566832A - Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor - Google Patents

Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor Download PDF

Info

Publication number
CN115566832A
CN115566832A CN202211175091.3A CN202211175091A CN115566832A CN 115566832 A CN115566832 A CN 115566832A CN 202211175091 A CN202211175091 A CN 202211175091A CN 115566832 A CN115566832 A CN 115566832A
Authority
CN
China
Prior art keywords
stator
short circuit
fault
teeth
circuit ring
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.)
Pending
Application number
CN202211175091.3A
Other languages
Chinese (zh)
Inventor
李大伟
王润宇
范兴纲
曲荣海
裴同豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
Original Assignee
Huazhong University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN202211175091.3A priority Critical patent/CN115566832A/en
Publication of CN115566832A publication Critical patent/CN115566832A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • 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
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H02K1/2783—Surface mounted magnets; Inset magnets with magnets arranged in Halbach arrays
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/12—Asynchronous induction motors for multi-phase current
    • H02K17/14—Asynchronous induction motors for multi-phase current having windings arranged for permitting pole-changing
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

The invention discloses a variable impedance fractional slot concentrated winding permanent magnet fault-tolerant motor, which belongs to the field of fault-tolerant motors.A stator comprises a stator core and a winding, stator teeth which are uniformly distributed along the circumferential direction are arranged on the inner side of the stator core, and stator slots are formed between adjacent stator teeth; the stator further includes: the short circuit device comprises a short circuit ring arranged at one end of a stator core and a separation plate arranged between the stator core and the short circuit ring; the short circuit ring is made of a magnetic conductive material, and the isolation plate is made of a non-magnetic conductive material; a space for the winding to pass through is formed between the stator core and the short circuit ring; the winding is wound along the stator teeth and the short circuit ring. According to the invention, the isolation plate made of the non-magnetic material and the short circuit ring made of the magnetic material are sequentially arranged at one end of the stator core of the fractional-slot concentrated winding motor, the winding is wound around the stator teeth and the short circuit ring, when turn-to-turn short circuit fault occurs, circumferential magnetic leakage can be generated on the short circuit ring without time delay, the motor is changed from low impedance to high impedance, the fault tolerance is strong, and the reliability is effectively improved.

Description

Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor
Technical Field
The invention belongs to the field of fault-tolerant motors, and particularly relates to a variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor.
Background
In order to protect the ecological environment and realize sustainable development, the pursuit of zero carbon emission becomes a common target of the transportation industry. Vehicles in daily life, such as automobiles and airplanes, become the leading corner of the electrification revolution. The motor is a core power source of a carrying tool, and needs to have excellent electromagnetic performance such as high power density, high efficiency and high power factor, and the permanent magnet motor is a preferred type of the motor due to the advantages. However, the permanent magnet motor has a large short-circuit current under a fault due to an excitation magnetic field which is difficult to adjust, and the system reliability is obviously reduced, which seriously limits the popularization and application of the permanent magnet motor.
Among the numerous types of faults in permanent magnet motors, the probability of occurrence of turn-to-turn short circuit faults is the highest, usually up to about 30% -40%. Two adjacent turns of coils are short-circuited due to insulation failure caused by power overload, mechanical stress, local high temperature and the like, and the short-circuit loop of a common motor has low impedance, so that high short-circuit current can be generated. The heat can be further accumulated at the short-circuit point by long-time large short-circuit current, so that the insulation is further deteriorated, the fault is continuously enlarged, and the safe and reliable operation of the motor is seriously threatened. Therefore, effective turn-to-turn short circuit fault suppression is the key content of the design of the permanent magnet fault-tolerant motor.
High impedance and weak coupling are the core ideas for improving the fault tolerance performance of the permanent magnet motor. The fractional-slot concentrated winding has the performances of strong electromagnetic isolation degree, small mutual inductance, small cogging torque and the like, and compared with a ring-winding permanent magnet motor, the fractional-slot concentrated winding has the advantages of smaller copper consumption and lighter weight, thereby becoming a preferable winding topology in the field of permanent magnet fault-tolerant motors. The fault-tolerant performance of the fractional slot concentrated winding motor can be further improved through design of isolation teeth, magnetic slot wedges and the like. However, for a common turn-to-turn short circuit fault, the short circuit loop impedance is small, and the short circuit current is often dozens of times of the rated current. The high-impedance design for increasing leakage inductance can only relieve the danger degree of faults to a certain extent, but cannot restrain short-circuit current within a controllable range. For example, a six-phase permanent magnet fault-tolerant motor and a driving system thereof are provided in patent document with application publication number CN109510558a, as shown in fig. 1, which adopts concentrated windings to improve isolation capability, and two sets of three-phase full-bridge driving circuits are used to respectively control armature windings; in FIG. 1, I-1 denotes a stator, I-2 denotes a rotor, and I-3 denotes a permanent magnet. When the system has a fault, the corresponding bidirectional thyristor is in a switching-on state to form a half-bridge power circuit with a neutral point, so that the control of the fault-tolerant operation of the system is realized. The whole system has the advantages of magnetic isolation, physical isolation, thermal isolation and small cogging torque. However, after the short-circuit fault occurs, the short-circuit current may reach tens of times of the rated current due to the small short-circuit loop impedance, which makes the motor less reliable.
In the patent document with the application publication number of CN110739792A, a double-layer winding Halbach fault-tolerant motor is provided, in the figure 2, II-1 represents a stator, II-2 represents a rotor, II-3 represents a Halbach permanent magnet array, II-4 represents a stator slot, II-5 represents an upper layer winding, II-6 represents a lower layer winding, and II-7 represents a slot wedge. When the winding fails, if the fault winding and the left and right adjacent windings are in the same phase, the different-phase winding and the fault winding are replaced by the same-slot different-layer winding, and if the fault winding and the left and right adjacent windings have different phases, the different-phase winding and the fault winding are replaced by the same-slot different-layer winding. The strong fault-tolerant performance of the motor is realized through the double-layer design of the winding. Although the fault-tolerant performance of the motor is improved while the interphase short-circuit risk is reduced, the fault needs to be detected in time after the fault occurs, a control system is complex, the response delay to the short-circuit fault is long, and the fault-tolerant performance and the reliability of the motor need to be further improved.
Disclosure of Invention
Aiming at the defects and improvement requirements of the prior art, the invention provides a variable-impedance fractional-slot concentrated-winding permanent-magnet fault-tolerant motor, which aims to realize timely and effective response to short-circuit faults and improve the fault-tolerant performance and reliability of the motor on the basis of fractional-slot concentrated windings.
In order to achieve the purpose, the invention provides a variable impedance fractional slot concentrated winding permanent magnet fault-tolerant motor, wherein a stator comprises a stator core and a winding, stator teeth which are uniformly distributed along the circumferential direction are arranged on the inner side of the stator core, and stator slots are formed between adjacent stator teeth; the stator further includes: the short circuit device comprises a short circuit ring arranged at one end of a stator core and a separation plate arranged between the stator core and the short circuit ring; the short circuit ring is made of a magnetic conductive material, and the isolation plate is made of a non-magnetic conductive material;
a space for the winding to pass through is formed between the stator core and the short circuit ring; the winding is wound around the stator teeth and the short circuit ring.
Further, the division board includes the ring, and the ring inboard is provided with along the fixed tooth of circumference evenly distributed.
Furthermore, the outer diameter of the short circuit ring does not exceed the inner diameter of the stator core, and supporting teeth distributed along the circumferential direction are arranged on the outer side of the short circuit ring.
Furthermore, the number of the fixed teeth and the number of the supporting teeth are equal to the number of the stator teeth, and the fixed teeth, the supporting teeth and the stator teeth are correspondingly arranged.
Furthermore, the stator is formed by splicing and fixing z modularized stator units along the circumferential direction; z is the number of stator slots;
the stator unit is a structure in which the axis of the stator teeth is used as the center, and the two sides of the axis are respectively 180 DEG/z.
Further, the width of the fixed teeth does not exceed the width of the stator teeth, and the width of the support teeth is smaller than the width of the fixed teeth.
Furthermore, the rotor adopts a magnetic-gathering Halbach structure.
Further, the short circuit ring is made of the same material as the stator core.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
when the motor works normally, because the winding directions of coils on the short circuit rings are the same and the sum of the currents of all phases is 0, no magnetic leakage along the circumferential path of the short circuit ring is generated at the moment, and the impedance of the motor is lower; after turn-to-turn short circuit fault occurs, because the sum of the currents of all phases is not equal to 0 any more, circumferential leakage flux can be generated on a short circuit ring without delay, and because the magnetic conductivity of a stator core is high, the corresponding circumferential leakage inductance is large, the motor is changed from low impedance to high impedance, and the motor has strong turn-to-turn short circuit current inhibition capability and strong fault tolerance. Because the circumferential leakage flux on the short-circuit ring is generated spontaneously and without time delay along with the turn-to-turn short-circuit fault, the whole system does not need fault detection and diagnosis, correspondingly does not need redundant detection coils and complex control strategies, and the integral reliability of the system is effectively improved.
Drawings
FIG. 1 is a schematic diagram of a conventional six-phase permanent magnet fault-tolerant motor and its driving system;
FIG. 2 is a schematic diagram of a conventional double-layer winding Halbach fault-tolerant motor;
fig. 3 is an overall structure diagram of a fractional-slot concentrated-winding permanent-magnet fault-tolerant motor according to an embodiment of the present invention;
fig. 4 is an exploded view of a fractional-slot concentrated-winding permanent-magnet fault-tolerant motor according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a modular stator unit according to an embodiment of the present invention;
fig. 6 is a schematic view of circumferential magnetic flux leakage in the short-circuit ring after turn-to-turn short-circuit fault according to the embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a comparison of single-turn short-circuit currents between a fractional-slot concentrated winding permanent magnet fault-tolerant motor according to an embodiment of the present invention and a conventional fractional-slot concentrated winding motor;
the same reference numbers will be used throughout the drawings to refer to the same or like parts or structures, wherein:
1-a stator; 11-stator core, 12-winding, 13-short circuit ring, 14-isolation plate;
2-rotor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the present application, the terms "first," "second," and the like (if any) in the description and the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In order to solve the technical problems that the conventional fractional slot concentrated winding permanent magnet fault-tolerant motor depends on complex detection and control means to effectively inhibit turn-to-turn short circuit current and cannot cope with a short circuit fault without time delay, the invention provides a variable impedance fractional slot concentrated winding permanent magnet fault-tolerant motor, which has the overall thought that: the short-circuit ring made of the magnetic conductive material is introduced into one axial end of a stator core of the fractional slot concentrated winding permanent magnet fault-tolerant motor, and the winding mode of a winding in the stator is specially set, so that when the motor has turn-to-turn short circuit fault, circumferential magnetic leakage is generated in the short-circuit ring without time delay, the motor is converted from low impedance to high impedance, short-circuit current is effectively inhibited, and the fault tolerance and the reliability of the motor are improved.
In an embodiment of the present invention, the variable impedance fractional slot concentrated winding permanent magnet fault-tolerant motor, as shown in fig. 3 to 5, includes a stator 1 and a rotor 2, where the stator 1 includes a stator core 11 and a winding 12, stator teeth uniformly distributed along a circumferential direction are disposed inside the stator core 11, and stator slots are formed between adjacent stator teeth; the stator further includes: a short circuit ring 13 disposed at one end of the stator core 11, and a spacer 14 disposed between the stator core 11 and the short circuit ring 13;
the short circuit ring 13 is made of a magnetic conductive material; optionally, in this embodiment, the short circuit ring 13 is made of the same material as the stator core 11, and in some other embodiments of the present invention, the short circuit ring and the stator core may also be made of different magnetic conductive materials;
the partition plate 14 is made of a material that is not magnetically conductive and has a small density;
a space through which the winding 12 can pass is formed between the stator core 11 and the short circuit ring 13; the winding 12 is wound around the stator teeth and the short circuit ring 13;
in this embodiment, the isolation plate 14 and the short-circuit ring 13 are located on the same side of the stator core 11, which facilitates the installation of the rotor 2; by arranging the isolation plate 14 between the stator core 11 and the short circuit ring 13, the magnetic leakage of the permanent magnet can be prevented from aggravating the saturation degree of the short circuit ring 13; to meet the space requirements for winding, the axial cross-sectional area of the separator 14 is greater than the area of the stator slots;
as shown in fig. 4, in the present embodiment, the isolation plate 14 includes a circular ring, and the inner side of the circular ring is provided with fixed teeth uniformly distributed along the circumferential direction, the number of the fixed teeth is equal to the number of the stator teeth, and the fixed teeth and the stator teeth are installed correspondingly; the fixed teeth are arranged, so that the fixed installation of the isolation plate 14 is facilitated; in the embodiment, the width of the fixed teeth does not exceed the width of the stator teeth; it will be readily appreciated that the outer diameter of the ring in the partition plate 14 does not exceed the outer diameter of the stator core 11, subject to the stator-side casing or rotor structure.
In the present embodiment, as shown in fig. 5, for the convenience of winding, the outer diameter of the short circuit ring 13 does not exceed the inner diameter of the stator core 11, and as shown in fig. 4, the outer side of the short circuit ring 13 is provided with support teeth distributed along the circumferential direction, the number of the support teeth is the same as that of the stator teeth, and the support teeth are installed corresponding to the fixed teeth; the support teeth may support the shorting ring 13 and facilitate the installation and positioning of the shorting ring 13. In order to minimize the magnetic flux leakage generated during the normal operation of the motor, in this embodiment, the width of the supporting teeth on the short-circuit ring 13 is as small as possible while ensuring the supporting function.
In order to facilitate processing and manufacturing, the present embodiment further adopts a modular design for the stator, specifically, the stator is divided into modular stator units equal to the number of stator slots along the circumferential direction, each stator unit is a structure in which the axis of the stator teeth is taken as the center and two sides of the axis are respectively 180 °/z, and z represents the number of stator slots; after the stator units are processed, the stator core parts, the isolation plate parts and the short circuit ring parts of the z stator units are sequentially adhered together along the circumferential direction, and therefore a complete stator structure is formed.
Taking one stator tooth as an example, in the present embodiment, the winding manner of the winding around the stator tooth is as shown in fig. 4, specifically: the winding is off-line from one side without the short circuit ring, enters the lower part of the isolation plate and winds to the bottom of the short circuit ring after passing through the left slot of the stator tooth, then winds around the short circuit ring for a circle, and enters the right slot of the stator tooth from the top of the short circuit ring and returns to one side without the short circuit ring. And the rest stator units are subjected to coil inserting in the same way, and the winding direction of each phase winding is the same.
The following explains the principle of implementing fault tolerance in this embodiment:
taking a three-phase motor as an example, when the motor works normally, because the winding directions of the coils on the short-circuit ring are the same and the sum of three-phase currents is 0, according to the ampere loop law, the circumferential path of the short-circuit ring has:
Figure BDA0003863950210000071
wherein N represents the number of turns in series per phase; i.e. i a 、i b And i c Respectively representing ABC three-phase current, H representing magnetic field intensity, and l representing the length of a circumferential path on the short-circuit ring; without leakage along the peripheral path of the short-circuit ringOnly a part of the magnetic flux passes through the short-circuit ring structure, and the most part of the magnetic flux passes through the conventional magnetic flux leakage of the peripheral air; when an inter-turn short-circuit fault occurs, the integral of the magnetic field intensity on the circumferential path of the short-circuit ring is not equal to 0 any more, and at this time, a circumferential leakage flux is generated, as shown in fig. 6, because the magnetic permeability of the iron core is high, the circumferential leakage inductance is large; after short-circuit fault happens, the circumferential magnetic flux leakage can have no time delay, the motor is converted from low impedance to high impedance, and the motor has extremely strong short-circuit current suppression capability, the whole system does not need fault detection and diagnosis, redundant detection coils and complex control strategies are not needed, the influence on the response of the short-circuit fault caused by the fault of the detection coils is avoided, and the influence on the reliability of the system caused by untimely response to the fault short-circuit fault is avoided, therefore, in the embodiment, the integral reliability of the system is improved. Besides three-phase systems, the present embodiment is applicable to other multi-phase systems, and can improve the reliability thereof.
As shown in fig. 7, compared with the conventional fractional-slot concentrated winding motor, when a short-circuit fault occurs, the variable-impedance fractional-slot concentrated winding fault-tolerant permanent magnet motor provided by the embodiment has the advantage that the short-circuit current is effectively suppressed due to the high impedance of the short-circuit ring. The larger the size of the short-circuit ring is, the stronger the fault tolerance is.
It should be noted that the short circuit ring and the winding thereon will increase the weight and loss of the motor to a certain extent, and the isolation plate will also increase the length of the end of the winding and the weight of the motor to a certain extent, so that the power density and efficiency of the system are reduced to some extent.
As shown in fig. 4, the present embodiment further includes a rotor 2 disposed inside the stator 1; in order to further reduce the weight of the rotor yoke portion and further achieve light weight, optionally, in the embodiment, the rotor adopts a magnetic-gathering Halbach structure. In other embodiments of the invention, the rotor may also be arranged outside the stator.
In general, the variable impedance fractional slot concentrated winding permanent magnet fault-tolerant motor provided by this embodiment has a low impedance during normal operation, and has the advantages of high efficiency and high power density, and after an inter-turn short circuit fault occurs, a large leakage inductance is excited on a short circuit loop on a short circuit ring, so that a short circuit current is further suppressed. According to the scheme, excessive fault detection is not needed, short-circuit fault handling can be carried out without delay, the low-impedance mode is immediately changed into the high-impedance mode after the short-circuit fault occurs, and the fault-tolerant performance of the motor is greatly improved. The modularized processing scheme further improves the production efficiency of the motor, and is suitable for the fields of aerospace, electric automobiles and the like with high reliability requirements.
It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the invention are possible and within the scope of the appended claims.

Claims (8)

1. A variable impedance fractional slot concentrated winding permanent magnet fault-tolerant motor comprises a stator, a stator core and a winding, wherein stator teeth which are uniformly distributed along the circumferential direction are arranged on the inner side of the stator core, and stator slots are formed between adjacent stator teeth; characterized in that the stator further comprises: the short circuit ring is arranged at one end of the stator core, and the isolation plate is arranged between the stator core and the short circuit ring; the short circuit ring is made of a magnetic conductive material, and the isolation plate is made of a non-magnetic conductive material;
a space for the winding to pass through is formed between the stator core and the short circuit ring; the winding is wound along the stator teeth and the short circuit ring.
2. The fault-tolerant variable-impedance fractional-slot concentrated winding permanent magnet motor according to claim 1, wherein the isolation plate comprises a circular ring, and the inside of the circular ring is provided with fixed teeth uniformly distributed along the circumferential direction.
3. The fault-tolerant variable-impedance fractional-slot concentrated winding permanent magnet motor according to claim 2, wherein an outer diameter of the short circuit ring does not exceed an inner diameter of the stator core, and support teeth distributed along a circumferential direction are arranged on the outer side of the short circuit ring.
4. The fault-tolerant variable-impedance fractional-slot concentrated winding permanent magnet motor according to claim 3, wherein the number of the fixed teeth and the number of the supporting teeth are equal to the number of the stator teeth, and the fixed teeth, the supporting teeth and the stator teeth are correspondingly arranged.
5. The variable impedance fractional slot concentrated winding permanent magnet fault tolerant motor of claim 4, wherein said stator is formed by splicing and fixing z modular stator units in a circumferential direction; z is the number of stator slots;
the stator unit is a structure of the stator, which takes the axis of the stator teeth as the center and 180 degrees/z on both sides of the axis respectively.
6. The fault-tolerant variable-impedance fractional-slot concentrated winding permanent magnet motor of claim 4, wherein the width of the stationary teeth does not exceed the width of the stator teeth, and the width of the support teeth is less than the width of the stationary teeth.
7. The fault-tolerant variable-impedance fractional-slot concentrated-winding permanent-magnet machine according to any one of claims 1 to 6, wherein a rotor of the fault-tolerant variable-impedance fractional-slot concentrated-winding permanent-magnet machine adopts a magnetic-concentration Halbach structure.
8. The fault-tolerant variable-impedance fractional-slot concentrated winding permanent magnet machine according to any one of claims 1 to 6, wherein the short circuit ring is made of the same material as the stator core.
CN202211175091.3A 2022-09-26 2022-09-26 Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor Pending CN115566832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211175091.3A CN115566832A (en) 2022-09-26 2022-09-26 Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211175091.3A CN115566832A (en) 2022-09-26 2022-09-26 Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor

Publications (1)

Publication Number Publication Date
CN115566832A true CN115566832A (en) 2023-01-03

Family

ID=84743230

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211175091.3A Pending CN115566832A (en) 2022-09-26 2022-09-26 Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor

Country Status (1)

Country Link
CN (1) CN115566832A (en)

Similar Documents

Publication Publication Date Title
Gerada et al. Integrated PM machine design for an aircraft EMA
Raminosoa et al. Design considerations for a fault-tolerant flux-switching permanent-magnet machine
US11502567B2 (en) Stator winding for a rotating electrical machine
Mitcham et al. Favourable slot and pole number combinations for fault-tolerant PM machines
EP3723242B1 (en) Sleeve rotor synchronous reluctance electric machine
US8294321B2 (en) Brushless machine having ferromagnetic side plates and side magnets
EP2456048B1 (en) Rotor structure for a fault-tolerant permanent magnet electromotive machine and corresponding method
US20090261686A1 (en) Stator of electric rotating machine and electric rotating machine
EP0754365B1 (en) Redundant electric motor arrangement including single rotor assembly having two magnet sections
CN112994390A (en) Birotor radial permanent magnet motor
CN110729868B (en) Magnetic steel built-in type double-U-shaped fractional slot concentrated winding permanent magnet motor
CN114285204B (en) Permanent magnet fault-tolerant motor
US7291958B2 (en) Rotating back iron for synchronous motors/generators
CN115693994A (en) Novel high fault-tolerant motor
CN115566832A (en) Variable-impedance fractional slot concentrated winding permanent magnet fault-tolerant motor
CN109412282A (en) A kind of multiphase fault-tolerant magneto
CN115347702A (en) Ring winding permanent magnet fault-tolerant motor and design method thereof
CN106230213B (en) Interturn in stator windings short trouble automatic fault tolerant polyphase synchronous generator
US9979248B2 (en) Short circuit fault tolerant permanent magnet machine
WO2011110857A2 (en) Fault tolerant flux switching machine
Raminosoa et al. Novel fault tolerant design of flux switching machines
JP3633232B2 (en) Electric motor
CN116231903A (en) Variable-impedance permanent magnet fault-tolerant motor
Zhang et al. Design and optimization of a six-phase fault-tolerant permanent magnet motor
CN116388436A (en) Winding structure for fault-tolerant motor and fault-tolerant motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination