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Method for lowering torque pulsation of permanent magnet synchronous motor

A permanent magnet synchronous motor, torque ripple technology, applied in the direction of torque ripple control, etc., to achieve the effect of reducing torque ripple, reducing output torque ripple, and improving performance

Active Publication Date: 2017-05-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On this basis, the analysis limited to the cogging torque is far from enough

Method used

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  • Method for lowering torque pulsation of permanent magnet synchronous motor
  • Method for lowering torque pulsation of permanent magnet synchronous motor
  • Method for lowering torque pulsation of permanent magnet synchronous motor

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Experimental program
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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0064] The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0065] Such as figure 2 As shown, the three-phase surface-embedded permanent magnet synchronous motor includes an outer stator 1 and an inner rotor 2; the outer stator 1 includes 48 stator slots and armature windings 4 embedded therein; the inner rotor 2 includes a rotor core And 8 permanent magnet poles 3 and 6 ventilation holes 5.

[0066] Taking the three-phase surface-embedded permanent magnet synchronous motor as an example, the method steps are as follows: Figure 12 shown.

[0067] 1) Analyze the pole-slot ratio of the target motor, and calculate an electrical cycle according to th...

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Abstract

The invention discloses a method for lowering torque pulsation of a permanent magnet synchronous motor. The method specifically comprising the steps of reasonably selecting a permanent magnet magnetic pole repetition unit method, selecting offset ways of primary offset and secondary offset and performing angle calculation. The offset units are applied to the permanent magnet magnetic pole repetition units singly or for multiple times, so that the motor performance is improved; the method can be applied to surface mounted, surface embedded type and internal embedded type permanent magnet motors, and torque pulsation caused by different torque components can be lowered; the permanent magnet synchronous motor can rapidly work out magnetic pole offset angles by reasonably selecting the offset units; after offset, the sine degree of counter electromotive force waveform can be effectively improved; each kind of sub-harmonic content of the torque pulsation can be reduced by peak valley cancellation between the torque pulsations generated by each repetition unit, so that the overall torque pulsation is lowered; and meanwhile, motor vibration noise can be introduced at the minimum level under the premise of ensuring that the output torque value of the motor is basically unchanged, so as to realize an optimal effect.

Description

technical field [0001] The invention relates to the design of a permanent magnet synchronous motor, in particular to a method for reducing the torque ripple of the permanent magnet synchronous motor, and belongs to the technical field of motor manufacturing. Background technique [0002] Nowadays, permanent magnet motors have been widely used, and they play a very important role in many fields from automobiles to aerospace. This is mainly due to several salient features of permanent magnet motors, including high torque density, high efficiency, and small weight and volume. The permanent magnet motor replaces the traditional excitation winding with high magnetic energy product magnetic material, which not only eliminates the negative impact of the excitation winding, but also simplifies the mechanical structure of the motor, improves the reliability of the motor operation, and reduces the mechanical loss accordingly. Small. [0003] Although permanent magnet motors have a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/10
CPCH02P6/10
Inventor 刘国海杜鑫鑫赵文祥陈前胡德水
Owner JIANGSU UNIV
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