Virtual polarity fractional-slot concentrated winding spoke type permanent magnet motor and torque ripple inhibition method thereof

A technology of concentrated winding and torque ripple, which is applied in the direction of torque ripple control and the shape/style/structure of winding conductors, which can solve the problems of unclear, time-consuming and complicated process of motor torque ripple

Active Publication Date: 2019-07-26
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A general disadvantage of these methods is that the process is complex and time-consuming, and the principle of reducing motor torque ripple is not clear

Method used

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  • Virtual polarity fractional-slot concentrated winding spoke type permanent magnet motor and torque ripple inhibition method thereof
  • Virtual polarity fractional-slot concentrated winding spoke type permanent magnet motor and torque ripple inhibition method thereof
  • Virtual polarity fractional-slot concentrated winding spoke type permanent magnet motor and torque ripple inhibition method thereof

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Embodiment Construction

[0068] 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.

[0069] 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.

[0070] Such as figure 1 As shown, the traditional spoke-type permanent magnet synchronous motor includes an outer stator 1, an inner rotor 2, and a permanent magnet 4; the outer stator 1 includes 12 stator slots and a double-layer fractional slot concentrated winding 3 embedded therein; the inner rotor 2 includes 10 rotor cores and 10 permanent magnets 4, and the excitation direction of the permanent magnets is shown in the figure.

[0071] Such as figure 2 As shown in , the first step is to add virtual poles to the outer edge of the traditional spoke rotor to form a rotor with virtual pol...

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Abstract

The invention discloses a virtual polarity fractional-slot concentrated winding spoke type permanent magnet motor and a torque ripple inhibition method thereof. A novel spoke type permanent magnet synchronous motor which is provided with a virtual polarity and is in hybrid connection with a star triangular winding is provided. The torque ripple of the motor is reduced by reducing stator and rotorharmonic orders respectively on the basis of determining the stator and rotor magnetomotive force harmonic orders influencing the torque ripple. The specific process comprises the step of determiningthe harmonic orders of rotor gap flux density influencing the torque ripple according to the relation that the rotor gap flux density is in direct proportion to rotor magnetomotive force. 11-th and 13-th harmonics in rotor magnetomotive force are eliminated by using unequal pole-arc coefficients, so that 12-th harmonics of torque ripple are eliminated. And then, 5-th, 7-th, 17-th and 19-th harmonics in stator magnetomotive force are eliminated by using the hybrid connection of the star triangular winding, so that 6-th and 18-th harmonics of torque ripple are eliminated, and the purpose of reducing the torque ripple integrally is reached.

Description

technical field [0001] The invention relates to the design of a spoke type permanent magnet synchronous motor, in particular to a method for reducing the torque ripple of the spoke type permanent magnet synchronous motor, and belongs to the technical field of motor manufacturing. Background technique [0002] Nowadays, permanent magnet synchronous 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 synchronous motors, including high torque density, high efficiency, and small weight and volume. The permanent magnet synchronous motor uses a magnetic material with a high magnetic energy product to replace the traditional excitation winding, which not only eliminates the negative impact of the excitation winding, but also simplifies the mechanical structure of the motor, which improves the reliability of the motor and reduces the mechanical loss accordin...

Claims

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Application Information

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IPC IPC(8): H02K3/12H02K3/28H02P6/10
CPCH02K3/12H02K3/28H02P6/10
Inventor 陈前徐高红翟芳芳刘国海
Owner JIANGSU UNIV
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