CN110739823A - electric automobile permanent magnet driving motor - Google Patents

electric automobile permanent magnet driving motor Download PDF

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Publication number
CN110739823A
CN110739823A CN201911268451.2A CN201911268451A CN110739823A CN 110739823 A CN110739823 A CN 110739823A CN 201911268451 A CN201911268451 A CN 201911268451A CN 110739823 A CN110739823 A CN 110739823A
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China
Prior art keywords
armature
winding
armature winding
windings
permanent magnet
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CN201911268451.2A
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Chinese (zh)
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CN110739823B (en
Inventor
丁富康
史立伟
陶学恒
吕炳昌
卞玉康
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Shandong University of Technology
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Shandong University of Technology
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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
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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
    • 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
    • H02K3/04—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

A permanent magnet driving motor for electric automobile is composed of shaft, rotor core, four permanent magnets fixed to the core in projected or embedded mode, radially magnetized permanent magnets, armature slots between two armature teeth, distributed armature windings wound in said slots and with opposite winding directions, the 1 st, 5 th, 9 th, 13 th, 17 th, 21 th, 25 th, 29 th, 33 th, 37 th, 41 th and 45 th slots as wide slots and the rest 36 slots as narrow slots, and the central lines of said two slots are at 7.5 deg. compared with traditional permanent magnet driving motor.

Description

electric automobile permanent magnet driving motor
Technical Field
The invention relates to electric automobile permanent magnet driving motors, and belongs to the technical field of automobile motor electric appliances.
Background
The permanent magnet synchronous motor has the advantages of simple structure, high efficiency, large power factor, no need of excitation windings and the like, and is concerned by countries in the world.
The permanent magnet synchronous motor is a motor which generates a synchronous rotating magnetic field through permanent magnet excitation. Classifying according to the structure of the permanent magnet: surface Permanent Magnet Synchronous Machines (SPMSM), Interior Permanent Magnet Synchronous Machines (IPMSM). Classifying according to the waveform of the induction potential of the stator winding: sine wave permanent magnet synchronous motor, brushless permanent magnet DC motor. Besides the advantages, the permanent magnet synchronous motor also has the advantages of simple structure, light weight and the like. However, the permanent magnet synchronous motor has the defects of difficult starting, poor shock resistance, high total harmonic content, easy influence of armature reaction and the like.
For these disadvantages, proposals have been made, for example, in the published Chinese patent, a rotor structure of a permanent magnet synchronous motor with hollow magnetism isolating ring is 201610459737.9, rotor structures of a permanent magnet synchronous motor with hollow magnetism isolating ring are disclosed, the rotor body is provided with a chute and a magnetic field shielding block, the change of the rotating speed can drive the position of the magnetic field shielding block to change, thereby reducing the magnetic leakage flux and increasing the excitation flux, the published Chinese patent, an asymmetric permanent magnet motor for new energy automobiles, application No. 201610004524.7, permanent magnet motors with asymmetrically arranged magnetic steel are disclosed, a plurality of permanent magnets are combined into a U-shaped structure, the torque fluctuation is reduced, the radial force of d axis and q axis tends to balance, the mechanical vibration and noise are reduced, the comprehensive performance of the motor is improved, in the published Chinese patent, a rotor of a permanent magnet synchronous motor and a permanent magnet synchronous motor, application No. 201510562547.5 discloses a novel motor structure, radial permanent magnets are added in the middle of two V-shaped permanent magnets, the polarity of the radial permanent magnets is the same as that of the two sides of the adjacent permanent magnets, the magnetic field waveform of the permanent magnets is reduced, and the torque.
At present, most permanent magnet synchronous motors adopt centralized windings, although the permanent magnet synchronous motors are simple in structure, the permanent magnet synchronous motors simultaneously have the disadvantages of overlarge cogging torque, overlarge torque pulsation, easy adverse influence of armature reaction on air gap flux density and the like, and the efficiency and the stability of the permanent magnet synchronous motors are not improved.
The invention provides electric automobile permanent magnet driving motors on the basis of ensuring that the cost of the motor is not changed excessively and the manufacturing process is not difficult to increase, the driving motor is of an inner rotor structure and comprises a shaft, a rotor iron core, permanent magnets, armature iron cores, a main armature winding, an auxiliary armature winding and a motor shell, the number of the permanent magnets is four, the permanent magnets are fixed on the rotor iron core in a surface protruding or embedded mode, an armature slot is arranged between two armature teeth and is divided into a wide armature slot and a narrow armature slot, and distributed eccentric armature windings, namely a armature winding, a second armature winding and a third armature winding, are wound in the armature slot.
Disclosure of Invention
The invention discloses electric automobile permanent magnet driving motors, which optimize an armature slot and adopt distributed eccentric windings, namely a th armature winding, a second armature winding and a third armature winding, on the premise of ensuring that the motor cost is not changed excessively and the manufacturing process is not increased in difficulty, thereby realizing the purpose of reducing the torque pulsation of the motor, and the adopted technical scheme is as follows:
permanent magnet driving motor for electric automobile comprises shaft, rotor core, permanent magnet, armature core, main armature winding, auxiliary armature winding and motor casing.
An armature groove is arranged between the two armature teeth, distributed eccentric armature windings are wound in the armature groove, and the winding directions of the adjacent armature windings are opposite; the motor is provided with 48 armature grooves, wherein the 1 st, 5 th, 9 th, 13 th, 17 th, 21 th, 25 th, 29 th, 33 th, 37 th, 41 th and 45 th armature grooves in the clockwise direction are wide armature grooves, and the rest 36 armature grooves are narrow armature grooves.
The wide armature slot cross-sectional area is 3 times the narrow armature slot cross-sectional area.
The included angle of the center lines of two adjacent armature grooves is 7.5 degrees.
The armature windings on the armature poles of the permanent magnet driving motors of the electric automobiles are divided into a armature winding, a second armature winding and a third armature winding, the armature winding is wound across four continuous armature slots, namely, the 4n-3 wide armature slot is wound to the 4n-1 narrow armature slot, wherein n is a positive integer, the 4n-3 wide armature slot to the 4n-1 narrow armature slot in the clockwise direction are wound with the second armature winding, and the 4n-3 wide armature slot to the 4n-2 narrow armature slot are wound with the third armature winding.
And the th armature winding, the second armature winding and the third armature winding which are simultaneously wound on the 4n-3 th wide armature slot are connected in series to form modular coils.
The permanent magnet driving motor for the electric automobile comprises modular coils consisting of 1 st, 2 nd, 3 rd and 4 th armature windings, modular coils consisting of 12+1 st, 12+2 th, 12+3 th and 12+4 th armature windings, … … (and the like) which are connected in series in the circumferential direction to form an A-phase armature winding, modular coils consisting of 5 th, 6 th, 7 th and 8 th armature windings, modular coils consisting of 12+5 th, 12+6 th, 12+7 th and 12+8 th armature windings, … … (and the like) which are connected in series to form a B-phase armature winding, modular coils consisting of 9 th, 10 th, 11 th and 12 th armature windings, modular coils consisting of 12+9 th, 12 th, 10 th, 12+11 th and 12+12 th armature windings, and modular coils consisting of … … (and the like) which are connected in series to form a C-phase armature winding.
The armature winding, the second armature winding, and the third armature winding turns ratio is preferably 0.8: 0.15: 0.05.
The invention has the following beneficial effects:
because the armature winding, the second armature winding and the third armature winding form a long-distance winding and a short-distance winding, the torque pulsation of the permanent magnet driving motor is effectively reduced.
Drawings
Fig. 1 shows permanent magnet driving motors of electric vehicle, wherein 1, wide armature slot 2, armature winding 3, narrow armature slot 4, armature iron core 5, permanent magnet 6, rotor iron core 7, shaft.
Fig. 2 shows a diagram of an electric vehicle permanent magnet drive 1/4 motor, wherein 8, a th armature winding 9, a second armature winding 10 and a third armature winding.
Fig. 3 shows a torque diagram of permanent magnet drive motors of an electric vehicle.
Fig. 4 is a wiring diagram of permanent magnet driving motors of an electric vehicle.
Detailed description of the preferred embodiments
The present invention proceeds to step which is described below in conjunction with the figures.
The invention discloses a permanent magnet driving motor of an electric automobile shown in figure 1, which comprises a shaft, a rotor core, a permanent magnet, an armature core, a main armature winding, an auxiliary armature winding and a motor shell, wherein the driving motor is of an inner rotor structure.
The number of the permanent magnets is four, the permanent magnets are fixed on the iron core of the rotor in a surface protruding or embedded mode, and the permanent magnets are magnetized in the radial direction.
An armature groove is arranged between the two armature teeth, distributed eccentric armature windings are wound in the armature groove, and the winding directions of the adjacent armature windings are opposite; the motor has 48 armature grooves, the 1 st, 5 th, 9 th, 13 th, 17 th, 21 th, 25 th, 29 th, 33 th, 37 th, 41 th and 45 th armature grooves in the clockwise direction are wide armature grooves, the rest 36 armature grooves are narrow armature grooves, and the cross section area of the wide armature grooves is 3 times of that of the narrow armature grooves.
The included angle of the center lines of two adjacent armature grooves is 7.5 degrees.
Along the circumferential direction, the modular coils consisting of the 1 st, the 2 nd, the 3 rd and the 4 th armature windings and the modular coils consisting of the 12+1 th, the 12+2 th, the 12+3 th and the 12+4 th armature windings, … … (and the like) are connected in series to form an A-phase armature winding; the module coils consisting of 5 th, 6 th, 7 th and 8 th armature windings and the module coils consisting of 12+5 th, 12+6 th, 12+7 th and 12+8 th armature windings, … … (and the like) are connected in series to form a B-phase armature winding; the module coils consisting of the 9 th, 10 th, 11 th and 12 th armature windings and the module coils consisting of the 12+9 th, 12+10 th, 12+11 th and 12+12 th armature windings, … … (and the like) are connected in series to form the C-phase armature winding.
As shown in a torque diagram of electric automobile permanent magnet driving motors in the invention shown in FIG. 3, the armature winding, the second armature winding and the third armature winding form a long-distance winding and a short-distance winding, so that the torque pulsation of the permanent magnet driving motor is effectively reduced.
The basic principle of this application is:
because the magnetic field generated by the permanent magnet in the permanent magnet motor interacts with the armature slot to generate torque to cause periodic torque pulsation, the armature slot is optimized to adopt a wide armature slot and a narrow armature slot and adopt distributed eccentric windings, namely armature winding, a second armature winding and a third armature winding form a long-distance winding and a short-distance winding on the premise of ensuring that the cost of the motor is not changed excessively and the manufacturing process is not increased in difficulty, so that the purpose of reducing the torque pulsation of the motor is realized.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (3)

  1. The permanent magnet driving motor for the electric automobile is characterized by comprising a shaft, a rotor iron core, a permanent magnet, an armature iron core, a main armature winding, an auxiliary armature winding and a motor shell;
    the number of the permanent magnets is four, the permanent magnets are fixed on the iron core of the rotor in a surface protruding or embedded mode, and the permanent magnets are magnetized in the radial direction;
    an armature groove is arranged between the two armature teeth, distributed armature windings are wound in the armature groove, and the winding directions of the adjacent armature windings are opposite;
    the number of the driving motors is 48, the 1 st, 5 th, 9 th, 13 th, 17 th, 21 th, 25 th, 29 th, 33 th, 37 th, 41 th and 45 th armature slots are wide armature slots clockwise along the circumferential direction, the rest 36 armature slots are narrow armature slots, and the cross-sectional area of the wide armature slots is 3 times that of the narrow armature slots;
    the included angle of the central lines of two adjacent armature grooves is 7.5 degrees;
    the armature windings on the armature poles are divided into th armature windings, a second armature winding and a third armature winding, wherein the th armature winding is wound across four continuous armature slots, namely, the 4n-3 th wide armature slot is wound to the 4n-1 th narrow armature slot, n is a positive integer, the 4n-3 th wide armature slot to the 4n-1 th narrow armature slot in the clockwise direction are wound with the second armature winding, the 4n-3 th wide armature slot to the 4n-2 th narrow armature slot are wound with the third armature winding, the th armature winding, the second armature winding and the third armature winding form an eccentric armature winding, and the th armature winding, the second armature winding and the third armature winding which are simultaneously wound on the 4n-3 th wide armature slot are connected in series to form modular coils.
  2. 2. The permanent magnet drive motor for the electric vehicle as claimed in claim 1, wherein 1 st, 2 nd, 3 rd and 4 th armature windings and 12+1 th, 12+2 th, 12+3 th and 12+4 th armature windings are connected in series in the circumferential direction to form an A-phase armature winding, 5 th, 6 th, 7 th and 8 th armature windings and 12+5 th, 12+6 th, 12+7 th and 12+8 th armature windings are connected in series to form a B-phase armature winding, 9 th, 10 th, 11 th and 12 th armature windings and 12+9 th, 12+10 th, 12+11 th and 12+12 th armature windings are connected in series to form a B-phase armature winding, and … … C-phase armature windings are connected in series to form a C-phase armature winding.
  3. 3. The permanent magnet motor of claim 1, wherein the turn ratio of the armature winding, the second armature winding and the third armature winding is preferably 0.8: 0.15: 0.05.
CN201911268451.2A 2019-12-11 2019-12-11 Permanent magnet driving motor of electric automobile Active CN110739823B (en)

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Application Number Priority Date Filing Date Title
CN201911268451.2A CN110739823B (en) 2019-12-11 2019-12-11 Permanent magnet driving motor of electric automobile

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Application Number Priority Date Filing Date Title
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CN110739823B CN110739823B (en) 2021-05-11

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000253602A (en) * 1999-02-26 2000-09-14 Mitsubishi Electric Corp Dc motor
CN1697287A (en) * 2005-04-29 2005-11-16 哈尔滨工业大学 Brushless DC electric machine in structure of short magnetic circuit
CN102318167A (en) * 2009-02-27 2012-01-11 Abb研究有限公司 Stator with intermediate teeth
CN108832736A (en) * 2018-06-27 2018-11-16 珠海格力节能环保制冷技术研究中心有限公司 A kind of special-shaped groove motor, stator and winding connection
CN109194075A (en) * 2018-09-13 2019-01-11 天津大学 The long short distance mixed winding of bilayer suitable for 36 slot, 14 pole three-phase permanent magnetic synchronous motor
CN110556931A (en) * 2019-09-24 2019-12-10 哈尔滨工业大学 Modularized multi-phase alternating current fault-tolerant motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000253602A (en) * 1999-02-26 2000-09-14 Mitsubishi Electric Corp Dc motor
CN1697287A (en) * 2005-04-29 2005-11-16 哈尔滨工业大学 Brushless DC electric machine in structure of short magnetic circuit
CN102318167A (en) * 2009-02-27 2012-01-11 Abb研究有限公司 Stator with intermediate teeth
CN108832736A (en) * 2018-06-27 2018-11-16 珠海格力节能环保制冷技术研究中心有限公司 A kind of special-shaped groove motor, stator and winding connection
CN109194075A (en) * 2018-09-13 2019-01-11 天津大学 The long short distance mixed winding of bilayer suitable for 36 slot, 14 pole three-phase permanent magnetic synchronous motor
CN110556931A (en) * 2019-09-24 2019-12-10 哈尔滨工业大学 Modularized multi-phase alternating current fault-tolerant motor

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