CN110417137B - Five-phase 5N/4N pole armature isolation fault-tolerant electro-magnetic doubly salient motor - Google Patents

Five-phase 5N/4N pole armature isolation fault-tolerant electro-magnetic doubly salient motor Download PDF

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Publication number
CN110417137B
CN110417137B CN201910700809.8A CN201910700809A CN110417137B CN 110417137 B CN110417137 B CN 110417137B CN 201910700809 A CN201910700809 A CN 201910700809A CN 110417137 B CN110417137 B CN 110417137B
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winding
phase
stator
motor
armature
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CN110417137A (en
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赵耀
邢磊
李东东
滕登晖
林顺富
陆佳煜
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Shanghai University of Electric Power
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Shanghai University of Electric Power
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • H02K1/146Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18Windings for salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

The invention relates to a five-phase 5N/4N pole armature isolation fault-tolerant electrically excited doubly salient motor, wherein a stator is provided with winding stator poles and non-winding stator poles, each winding stator pole is intensively wound with an armature winding and an exciting winding, and a non-winding stator pole is arranged between adjacent winding stator poles at intervals, so that mutual inductance between adjacent winding stator poles is reduced, physical isolation is realized, turn-to-turn short circuits are avoided, and the fault tolerance of the motor is improved. The winding stator poles and the winding-free stator poles are uniformly distributed. The armature winding and the exciting winding are wound on the same stator pole, and adjacent stator poles are not wound, so that the alternate mutual inductance is reduced, the loss is reduced, and the fault tolerance of the motor is improved. The exciting windings are the same relative to the armature windings of each phase, so that the armature windings of each phase have the same output, symmetrical phase magnetic circuits are generated, and electromagnetic force is balanced. And the traditional electrically excited doubly salient motor has the advantages of convenience in magnetic adjustment, simple structure, easiness in heat dissipation and high reliability.

Description

Five-phase 5N/4N pole armature isolation fault-tolerant electro-magnetic doubly salient motor
Technical Field
The invention relates to a doubly salient motor, in particular to an electrically excited doubly salient motor.
Background
Since the last 90 th century, high-performance permanent magnet materials and power electronic technologies have been rapidly developed, and doubly salient motors have been developed, and electro-excited doubly salient motors are developed on the basis of permanent magnet doubly salient motors, wherein stator magnetic steel is replaced by excitation windings, and electro-excitation is easier to realize in weak magnetic control and voltage regulation control in the power generation process than permanent magnets, and have wide application prospects in the aspects of aerospace, wind power generation and new energy automobiles. A double salient motor is one type of variable reluctance motor. There are two types of variable reluctance motors: single-sided salient poles and double-sided salient poles. The double-sided salient pole variable reluctance motor has higher power generation because of larger ratio of the maximum value to the minimum value of the magnetic resistance, and is focused by vast scholars. The doubly salient motor is divided into single-phase, two-phase or four-phase, three-phase, five-phase and multi-phase doubly salient motors according to the number of phases. The electro-magnetic double-salient electrode has the characteristics that: compared with a permanent magnet doubly salient motor, the direct-current motor has the advantages that the direct-current excitation is adopted, the excitation adjustment is simple and convenient, the direct-current motor replaces a permanent magnet, the manufacturing cost of the motor is reduced, and the motor does not have the demagnetization problem because the permanent magnet is not arranged. The rotor of the doubly salient motor has no winding, the armature winding and the exciting winding are all concentrated on the stator pole, the rotor is formed by laminating silicon steel sheets, and the doubly salient motor has no coil and magnetic steel, and has simple and firm structure. Is suitable for high-power high-speed operation occasions. The electric excitation doubly salient motor can change output voltage by changing a direct current excitation power supply, and has convenient and reliable voltage regulation and simple external circuit structure. The traditional doubly salient electric excitation motor is generally excited by distributed excitation, excitation windings are wound on stator poles of a plurality of doubly salient motors, the problem of asymmetric phase magnetic circuits exists, and the problem of uneven distribution of motor armature winding loss and rectifier bridge loss can be caused.
Disclosure of Invention
Based on the traditional electro-magnetic doubly salient motor and combined with the body characteristic of the doubly salient motor, the invention provides a five-phase 5N/4N pole armature isolation fault-tolerant electro-magnetic doubly salient motor, wherein an armature winding and an exciting winding are wound on the same stator pole, and adjacent stator poles are free of windings, and because a stator pole without windings is arranged, the inter-phase mutual inductance is reduced, and physical isolation exists between phases, so that inter-turn short circuit is avoided, and the fault tolerance of the motor is increased. The exciting windings are uniformly distributed on the stator poles to generate symmetrical phase magnetic circuits and balance electromagnetic force. And the traditional electrically excited doubly salient motor has the advantages of convenience in magnetic adjustment, simple structure, easiness in heat dissipation and high reliability. Lays a foundation for better utilizing the electric and power generation operation characteristics of the doubly salient motor.
The invention adopts the following technical scheme to realize the aim:
the five-phase 5N/4N pole armature isolated fault-tolerant electro-magnetic doubly salient motor comprises a stator and a rotor, wherein the stator and the rotor are of doubly salient structures, a winding stator pole and a winding-free stator pole are arranged in the stator, an armature winding and an exciting winding are intensively wound on each winding stator pole, and a winding-free stator pole is arranged between adjacent winding stator poles at intervals, so that mutual inductance between adjacent winding stator poles is reduced, physical isolation is realized, turn-to-turn short circuits are avoided, and fault tolerance of the motor is improved.
Further, the winding stator poles and the winding-free stator poles are uniformly distributed.
Further, one end of the armature winding is led out and connected together, and the other end of the armature winding is connected between two diodes of the full-bridge circuit.
The novel five-phase 5N/4N (N is a positive integer) structure electro-magnetic synchronous motor adopts the technical scheme and has the following beneficial effects:
(1) The turn-to-turn short circuit is avoided, and the fault tolerance is greatly improved;
(2) The winding is simple to wind, easy to dissipate heat and not easy to damage;
(3) The phase magnetic circuits are symmetrical and the electric excitation is balanced;
(4) The wire diameter of the winding is increased, and the copper loss is reduced.
Drawings
FIG. 1 is a two-dimensional structure diagram of a 10/8 structure electro-magnetic synchronous motor;
FIG. 2 is a diagram of a 10/8 structure rectification circuit of an electrically excited synchronous motor;
FIG. 3 is a five-phase winding flux linkage simulation diagram;
Fig. 4 is a simulation diagram of counter electromotive force of the five-phase winding;
FIG. 5 is a simulation diagram of a rectified output voltage;
Primary symbol names in fig. 1: z is the load connected with the rectifying circuit; LA1, LB1, LC1, LD1 and LE1 are respectively the winding inductances of A phase, B phase, C phase, D phase and E phase of the 10/8 structure electro-magnetic synchronous motor; d1, D2, D3, D4, D5, D6, D7, D8, D9, D10 are rectifier circuit diodes; EA1, EB1, EC1, ED1 and EE1 are respectively the opposite electric potentials of A phase, B phase, C phase, D phase and E of the 10/8 structure electro-magnetic synchronous motor; A. b, C, D, E are respectively the armature windings of the A phase, the B phase, the C phase, the D phase and the E phase of the 10/8 electro-excitation synchronous motor; f is the exciting winding of the electric exciting synchronous motor.
Detailed Description
The invention discloses a novel five-phase 5N/4N (N is a positive integer) structure fault-tolerant electro-magnetic doubly salient motor, wherein a set of armature windings and a set of excitation windings are wound on a stator pole of the motor. One end of the armature winding is led out and connected together, the other end of the armature winding is connected between two diodes of the full bridge circuit, the A phase winding is connected between the positive end of the diode D1 and the negative end of the diode D10, the B phase winding is connected between the positive end of the diode D2 and the negative end of the diode D9, the C phase winding is connected between the positive end of the diode D3 and the negative end of the diode D8, the D phase winding is connected between the positive end of the diode D4 and the negative end of the diode D7, and the E phase winding is connected between the positive end of the diode D5 and the negative end of the diode D6. The armature winding and the exciting winding are uniformly distributed on the stator poles, a stator pole without winding is arranged between different winding phases, and compared with the traditional double-salient pole motor with windings in each phase, the mutual inductance between the armature winding and the armature winding is reduced. The mutual inductance between the excitation windings is reduced similarly, physical isolation exists between phases, turn-to-turn short circuit between the phases is avoided, and the fault tolerance of the motor is improved. Because the armature windings and the exciting windings are uniformly distributed on the stator poles, the positions of the armature windings of each phase are the same relative to the exciting windings, so that the force of each phase is uniform, a symmetrical phase magnetic circuit is generated, and the electromagnetic force is balanced. And the advantages of convenience in magnetic field adjustment, low cost and simple and reliable rotor structure of the traditional distributed excitation doubly salient motor are maintained. The motor has balanced electromagnetic force, symmetrical magnetic circuit, reduced mutual inductance, increased fault tolerance and symmetrical phase current.
The invention is applicable to various fault-tolerant electro-magnetic doubly salient motors with 5N/4N (N is a positive integer), and the technical scheme of the invention will be described in detail below by taking an electro-magnetic doubly salient motor with a five-phase 10/8 structure as an example with reference to the accompanying drawings:
As shown in fig. 1, in the five-phase 10/8-structure electro-magnetic doubly salient motor, both a stator 1 and a rotor 2 are of doubly salient structures, exciting current is introduced into an exciting winding 4, and a main magnetic field is generated inside the motor. The armature winding 3 and the exciting winding 4 are wound on the same stator pole, and a stator pole without winding is arranged between each phase of the armature winding 3 and the exciting winding 4. One end of the armature winding 3 is led out and connected together, the other end of the armature winding is connected between two diodes of the full bridge circuit, the A phase winding is connected between the positive end of the diode D1 and the negative end of the diode D10, the B phase winding is connected between the positive end of the diode D2 and the negative end of the diode D9, the C phase winding is connected between the positive end of the diode D3 and the negative end of the diode D8, the D phase winding is connected between the positive end of the diode D4 and the negative end of the diode D7, and the E phase winding is connected between the positive end of the diode D5 and the negative end of the diode D6. The novel doubly salient motor has five-phase armature windings, A, B, C, D, E respectively. The cathodes of the five phases are X, Y, Z, W, M respectively, and the winding mode of the five-phase armature winding is shown in fig. 1. The armature winding and the exciting winding together form a novel doubly salient motor power generation system.
The rectifier circuit of the power generation system corresponding to the 10/8-structure fault-tolerant electro-magnetic doubly-salient motor is shown in fig. 2, and is exemplified by a full-bridge uncontrolled rectifier circuit, one end of an armature winding is led out and connected together, the other end of the armature winding is connected between two diodes of the full-bridge circuit, the phase A is wound and connected between the positive end of a diode D1 and the negative end of a diode D10, the phase B is wound and connected between the positive end of a diode D2 and the negative end of a diode D9, the phase C is wound and connected between the positive end of a diode D3 and the negative end of a diode D8, the phase D is wound and connected between the positive end of a diode D4 and the negative end of a diode D7, and the phase E is wound and connected between the positive end of a diode D5 and the negative end of a diode D6.
The initial position of the motor is shown in fig. 1, the A, B, C, D, E five-phase flux linkage is shown in fig. 3, A, B, C, D, E five opposite electric potentials are shown in fig. 4, according to the connection mode of the windings and the diodes, the A, B, C, D, E five-phase windings supply power to a load when the rotor poles slide in and slide out, the armature reaction is demagnetizing when the rotor poles slide in, and the armature reaction is demagnetizing when the rotor poles slide out. Fig. 5 is an unfiltered rectified output voltage waveform.
Because the armature winding and the exciting winding are wound on the same stator pole, adjacent stator poles are not provided with windings, and the interval between one stator pole is not provided with windings, the phase mutual inductance is reduced, the loss is reduced, and the fault tolerance of the motor is improved. The exciting windings are the same relative to the armature windings of each phase, so that the armature windings of each phase have the same output, symmetrical phase magnetic circuits are generated, and electromagnetic force is balanced. And the traditional electrically excited doubly salient motor has the advantages of convenience in magnetic adjustment, simple structure, easiness in heat dissipation and high reliability.
The winding structure and the rectifying mode are convenient to realize, simple in structure and good in application prospect.

Claims (1)

1. A five-phase 5N/4N pole armature isolated fault-tolerant electro-magnetic doubly salient motor comprises a stator and a rotor, and is characterized in that: the stator and the rotor are of double salient pole structures, winding stator poles and winding-free stator poles are arranged in the stator, an armature winding and an excitation winding are intensively wound on each winding stator pole, and one winding-free stator pole is arranged between adjacent winding stator poles, so that mutual inductance between adjacent winding stator poles is reduced, physical isolation is realized, turn-to-turn short circuit is avoided, and fault tolerance of the motor is improved; one end of the armature winding is led out and connected together, and the other end of the armature winding is connected between two diodes of the full-bridge circuit; the winding stator poles and the winding-free stator poles are uniformly distributed.
CN201910700809.8A 2019-07-31 2019-07-31 Five-phase 5N/4N pole armature isolation fault-tolerant electro-magnetic doubly salient motor Active CN110417137B (en)

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CN113726036A (en) * 2021-08-23 2021-11-30 南京航空航天大学 6N/4N pole three-phase electro-magnetic doubly salient motor with isolated windings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106257802A (en) * 2015-10-30 2016-12-28 北京精密机电控制设备研究所 A kind of fault-tolerant motor topological structure
CN109245370A (en) * 2018-09-18 2019-01-18 上海电力学院 A kind of four phase double-fed electric excitation synchronous motors
CN210167865U (en) * 2019-07-31 2020-03-20 上海电力大学 Five-phase 5N/4N pole armature isolated fault tolerant electric excitation double salient pole motor

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Publication number Priority date Publication date Assignee Title
CN1114797A (en) * 1994-07-07 1996-01-10 罗代云 Rotor excitation commutator-free direct current motor
CN101414775A (en) * 2008-12-02 2009-04-22 江苏大学 Freestanding bi-convex-pole fault-tolerance motor
CN203368275U (en) * 2013-06-03 2013-12-25 东南大学 Open winding hybrid excitation motor
CN107070152A (en) * 2017-05-08 2017-08-18 史立伟 A kind of five phase high reliability electric excitation generators
CN109167497A (en) * 2018-09-18 2019-01-08 上海电力学院 A kind of four mutually three-winding electric excitation biconvex electrode electric machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106257802A (en) * 2015-10-30 2016-12-28 北京精密机电控制设备研究所 A kind of fault-tolerant motor topological structure
CN109245370A (en) * 2018-09-18 2019-01-18 上海电力学院 A kind of four phase double-fed electric excitation synchronous motors
CN210167865U (en) * 2019-07-31 2020-03-20 上海电力大学 Five-phase 5N/4N pole armature isolated fault tolerant electric excitation double salient pole motor

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