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A virtual pole fractional slot concentrated winding spoke permanent magnet motor and its torque ripple suppression method

A technology of concentrated winding and torque ripple, applied in the direction of torque ripple control, shape/style/structure of winding conductors, etc., can solve the problems of unclear motor torque ripple principle, time-consuming, complicated process, etc. Effects of output torque loss, torque ripple reduction, and stability improvement

Active Publication Date: 2021-06-22
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A virtual pole fractional slot concentrated winding spoke permanent magnet motor and its torque ripple suppression method
  • A virtual pole fractional slot concentrated winding spoke permanent magnet motor and its torque ripple suppression method
  • A virtual pole fractional slot concentrated winding spoke permanent magnet motor and its torque ripple suppression method

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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 spoke type permanent magnet motor with virtual pole fraction slot concentrated winding and a torque ripple suppression method thereof. A novel hub-and-spoke permanent magnet synchronous motor with hybrid connection of virtual poles and star-delta windings is proposed. On the basis of determining the stator and rotor magnetomotive force harmonic order that affects the torque ripple, the torque ripple of the motor is reduced by reducing the stator and rotor harmonic order respectively. The specific process includes: according to the proportional relationship between the rotor air gap flux density and the rotor magnetomotive force, determine the harmonic order of the rotor air gap flux density that affects the torque ripple. The 12th harmonic of the torque ripple is eliminated by using unequal pole arc coefficients to eliminate the 11th and 13th harmonics in the rotor magnetomotive force. Then, by using the star-delta winding hybrid connection to eliminate the 5th, 7th, 17th and 19th harmonics in the stator magnetomotive force, thereby eliminating the 6th and 18th harmonics of the torque ripple, achieving an overall reduction in the torque The purpose of torque pulse.

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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Patent Type & Authority Patents(China)
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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