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Asymmetric permanent magnet auxiliary synchronous reluctance motor and design method for improving torque performance

A technology for assisting synchronous and reluctance motors. It is applied in the direction of magnetic circuit rotating parts, magnetic circuits, and electric components. Effects of Torque Ripple, Weakening and Permanent Magnet Torque Ripple

Active Publication Date: 2018-05-01
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this structure will also reduce the average torque, and the choice of magnetic barrier angle is limited

Method used

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  • Asymmetric permanent magnet auxiliary synchronous reluctance motor and design method for improving torque performance
  • Asymmetric permanent magnet auxiliary synchronous reluctance motor and design method for improving torque performance
  • Asymmetric permanent magnet auxiliary synchronous reluctance motor and design method for improving torque performance

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention.

[0037] Such as figure 2 As shown, the invention discloses an asymmetrical permanent magnet assisted synchronous reluctance motor and a design method for obtaining optimal torque performance. figure 1 It is an existing permanent magnet assisted synchronous reluctance motor. Such as figure 1 The permanent magnet assisted synchronous reluctance motor includes a stator 1 and a rotor 2; the stator includes 36 slots and armature windings 3 embedded in the slots; the rotor includes a rotor core, 24 permanent magnets and 4 sets of magnetic barriers ; Each group of magnetic barriers is a 2-layer U-shaped structure. The present invention regards it as the existing motor, and on this basis, the slot ...

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Abstract

The invention discloses an asymmetric permanent magnet auxiliary synchronous reluctance motor and a design method for improving torque performance. A stator includes a plurality of tooth portions arranged in the circumferential direction, a plurality of stator slots, and an armature winding embedded in the slots. The slots are composed of repeating units. Each slot is symmetrical about a centerline. The opening corresponding to each slot is not symmetrical about the centerline. The repeating unit is composed of four stator slots. The openings of the four stator slots are successively deflectedby a specific angle in the clockwise circumferential direction. A rotor includes a rotor core, a plurality of permanent magnets, and groups of magnetic barriers. Each group of magnetic barriers is atwo-layer U-shaped structure. The permanent magnets are placed in the magnetic barrier structures. The asymmetric stator slot opening structure weakens the cogging torque, the reluctance torque rippleand total torque ripple of the permanent magnet synchronous motor. The method of the invention does not cause the reduction of the average torque, and there is no asymmetry of three-phase no-load back-EMF due to the asymmetrical stator slot distribution, thereby improving the overall performance of the motor.

Description

technical field [0001] The invention relates to a permanent magnet assisted synchronous reluctance motor and a design method for obtaining optimal torque performance, and belongs to the field of permanent magnet assisted synchronous motors. Background technique [0002] The permanent magnet assisted synchronous reluctance motor has the advantages of simple structure, high power density, high efficiency, wide speed range, small size and light weight, so it has good application prospects in many occasions such as electric vehicles and hybrids. . However, conventional permanent magnet assisted synchronous reluctance motors will generate large torque ripples due to the interaction between the stator magnetomotive force and the rotor structure. Torque ripple will have a great impact on motor performance, such as large vibration and noise. [0003] The document IEEE Transactions on Industry Applications, 45(1): 152-160, 2009 (Permanent-Magnet synchronous motor magnet designs wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K1/27
CPCH02K1/165H02K1/2706H02K2201/06H02K2213/03H02K2213/12
Inventor 刘国海徐媚媚赵文祥吉敬华陈前胡德水
Owner JIANGSU UNIV
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