Permanent magnet synchronous motor for weakening cogging torque of built-in permanent magnet motor

A permanent magnet motor and cogging torque technology, which is applied to synchronous motors with stationary armatures and rotating magnets, synchronous machines, synchronous machine parts, etc., can solve the problem of difficult optimization of pole arcs, large cogging torque, etc. problems, to achieve the effect of improving dynamic performance, suppressing cogging torque, and suppressing vibration and noise

Pending Publication Date: 2018-10-30
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the surface-mounted rotor structure, the built-in permanent magnet motor has lower economic cost and simpler processing technology, but the disadvantage is that the pole arc is more difficult to optimize and the cogging torque is relatively large

Method used

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  • Permanent magnet synchronous motor for weakening cogging torque of built-in permanent magnet motor
  • Permanent magnet synchronous motor for weakening cogging torque of built-in permanent magnet motor
  • Permanent magnet synchronous motor for weakening cogging torque of built-in permanent magnet motor

Examples

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Effect test

Embodiment 1

[0025] Such as figure 1 with figure 2 As shown, the permanent magnet synchronous motor that weakens the cogging torque of the interior permanent magnet motor, figure 1 The dotted line intersection point is the center of the arc. Including the stator, the casing outside the stator, the end covers at both ends of the casing, the motor shaft 5 and the rotor 4, the motor shaft 5 passes through the rotor 4 and is fixed with the rotor 4, the rotor 4 is located inside the ring-shaped stator, and the stator includes The stator core 1 and the motor winding 2, the stator core 1 has a stator slot, the motor winding 2 is wound on the stator slot of the stator core 1, the rotor 4 includes an even number of permanent magnet poles, and two adjacent permanent magnets A pair of magnetic poles; two permanent magnets 3 are arranged in the permanent magnet magnetic poles, and magnetic isolation bridges 6 are arranged at both ends of the permanent magnets 3, and the interior of the magnetic iso...

Embodiment 2

[0028] A permanent magnet synchronous motor that weakens the cogging torque of a built-in permanent magnet motor, including a stator, a casing outside the stator, end covers at both ends of the casing, a motor shaft 5 and a rotor 4, and the motor shaft 5 passes through the rotor 4 and connects to the rotor 4 Fixed together, the rotor 4 is located inside the ring-shaped stator. The stator includes a stator core 1 and a motor winding 2. The stator core 1 has a stator slot, and the motor winding 2 is wound on the stator slot of the stator core 1. The rotor 4 There are even pairs of permanent magnet poles, and two adjacent permanent magnet poles are a pair; two permanent magnets 3 are arranged in the permanent magnet poles, and the two ends of the permanent magnets 3 are provided with a magnetic isolation bridge 6, and a magnetic isolation bridge 6 Inside is air. The two permanent magnets 3 are "V"-shaped, and the polarities in the radial direction of the "V"-shaped cross-section ...

Embodiment 3

[0031] A permanent magnet synchronous motor that weakens the cogging torque of a built-in permanent magnet motor, including a stator, a casing outside the stator, end covers at both ends of the casing, a motor shaft 5 and a rotor 4, and the motor shaft 5 passes through the rotor 4 and connects to the rotor 4 Fixed together, the rotor 4 is located inside the ring-shaped stator. The stator includes a stator core 1 and a motor winding 2. The stator core 1 has a stator slot, and the motor winding 2 is wound on the stator slot of the stator core 1. The rotor 4 There are even pairs of permanent magnet poles, and two adjacent permanent magnet poles are a pair; two permanent magnets 3 are arranged in the permanent magnet poles, and the two ends of the permanent magnets 3 are provided with a magnetic isolation bridge 6, and a magnetic isolation bridge 6 The interior is filled with ceramic material and bonded. The two permanent magnets 3 are "V"-shaped, and the polarities in the radial ...

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Abstract

The invention relates to a permanent magnet synchronous motor for weakening cogging torque of a built-in permanent magnet motor; a motor shaft passes through a rotor and is fixed with the rotor; the rotor is located on the inner side of a ring-shaped stator; the stator comprises a stator core and a motor winding; the motor winding is wound on a stator slot of the stator core; the rotor comprises permanent magnet poles in even pairs; two permanent magnets are arranged in the permanent magnet poles; the two permanent magnets are in a "V" shape; the "V" shaped sections of the two permanent magnets have the same polarity in the radial direction; the permanent magnets in the adjacent permanent magnet poles have the opposite polarities; each permanent magnet pole on the outer periphery of the rotor is an arc, the radius of which is smaller than the radius of the ring-shaped inner wall of the stator core; the arc corresponding to each permanent magnet pole is eccentric, wherein the eccentricdistances of the arcs of the adjacent permanent magnet poles are different; and the eccentric distances of the arcs of the separated permanent magnet poles are the same. Such a rotor structure can weaken the cogging torque.

Description

technical field [0001] The invention belongs to the field of motors, and relates to a permanent magnet synchronous motor that weakens the cogging torque of a built-in permanent magnet synchronous motor by adopting a rotor structure with different eccentricity for the N pole and the S pole. Background technique [0002] The cogging torque of the permanent magnet motor is related to many factors, such as: permanent magnet pole parameters, armature parameters, etc. By changing the pole arc coefficient of the magnetic pole, using unequal thick magnetic poles, cheap magnetic poles, oblique poles, magnetic pole segmentation, changing the slot width, changing the shape of the teeth, chute, opening auxiliary slots, choosing a reasonable number of slots, etc. The cogging torque of the motor is reduced. [0003] Compared with the surface-mounted rotor structure, the built-in permanent magnet motor has lower economic cost and simpler processing technology, but the disadvantage is that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/16H02K1/27H02K21/02
CPCH02K1/16H02K1/2766H02K21/025H02K21/14H02K2213/03
Inventor 陈丽香孙宁王晓宇张超潘敬涛付佳玉
Owner SHENYANG POLYTECHNIC UNIV
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