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Integer slot distribution winding virtual pole spoke type permanent magnet synchronous motor and low pulsation design method thereof

A permanent magnet synchronous motor, distributed winding technology, applied in synchronous motors with stationary armatures and rotating magnets, synchronous machines, synchronous machine parts, etc., can solve problems such as high complexity

Active Publication Date: 2019-07-16
JIANGSU UNIV +1
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Problems solved by technology

[0005] Aiming at the shortcomings of high torque ripple of existing spoke motors and the high complexity of existing torque ripple suppression methods, the present invention firstly proposes a novel spoke-type permanent magnet synchronous motor with virtual poles. Due to the virtual pole structure, Makes it possible to use unequal arc coefficients and pole offsets circumferentially

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  • Integer slot distribution winding virtual pole spoke type permanent magnet synchronous motor and low pulsation design method thereof
  • Integer slot distribution winding virtual pole spoke type permanent magnet synchronous motor and low pulsation design method thereof
  • Integer slot distribution winding virtual pole spoke type permanent magnet synchronous motor and low pulsation design method thereof

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Embodiment Construction

[0072] 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.

[0073] 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.

[0074] Such as figure 1 As shown, the traditional five-phase 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 40 stator slots and a single-layer integer slot distribution winding 3 embedded therein; The inner rotor 2 includes 8 rotor cores and 8 permanent magnets 4, and the excitation directions of the permanent magnets are shown in the figure.

[0075] 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 vir...

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Abstract

The invention discloses an integer slot distribution winding virtual pole spoke type permanent magnet synchronous motor and a low pulsation design method thereof. A virtual pole structure is additionally arranged on the outer edge of the spoke type permanent magnet synchronous motor, and a low-pulse virtual pole spoke type permanent magnet synchronous motor can be obtained through asymmetric and offset pole design of the virtual pole. The method for restraining torque pulsation can be divided into the following steps of firstly, starting from a principle of torque pulsation generation, determining the rotor magnetomotive force harmonic order affecting torque pulsation; secondly, according to the relation that the rotor air gap flux density is in direct proportion to the rotor magnetomotiveforce, determining the harmonic order of the rotor air gap flux density influencing the torque pulsation; and then carrying out derivation of a fourier expression of the rotor air gap flux density inunequal virtual magnetic pole arc coefficients, and then obtaining a formula between an unequal-pole arc coefficient angle difference value and a specific torque pulsation main harmonic order; and finally, eliminating the secondary torque pulsation through the unequal-pole arc coefficients, wherein the magnetic pole offset is used for eliminating primary torque pulsation.

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): H02K21/14H02K21/02H02K1/27
CPCH02K1/2766H02K21/025H02K21/14H02K2213/03
Inventor 陈前徐高红赵文祥刘国海
Owner JIANGSU UNIV
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