Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux

A switched reluctance motor, magnetic flux suppression technology, applied in electrical components, electromechanical devices, magnetic circuit static parts, etc. The effect of suppressing torque ripple

Inactive Publication Date: 2009-10-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the effect of suppressing the torque ripple of the switched reluctance motor in the existing method is not obvious, and provides a permanent magnet flux suppressing torque ripple switched reluctance motor

Method used

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  • Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux
  • Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux
  • Switched reluctance motor with torque pulsation inhibited by permanent magnetic flux

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specific Embodiment approach 1

[0008] Specific implementation mode one: the following combination Figure 1 to Figure 9 Describe this embodiment, this embodiment includes a stator and a rotor, the stator is located outside the rotor, the stator includes a circular stator core 1 and stator teeth 2, the rotor includes a rotor core 3 and rotor teeth 4, the stator core 1 Stator teeth 2 are evenly distributed on the inner surface, and rotor teeth 4 are evenly distributed on the outer surface of the rotor core 3. There is an air gap 6 between the stator and the rotor. The axis of the stator coincides with the axis of the rotor.

[0009] The permanent magnet flux suppression torque ripple switched reluctance motor also includes two strip-shaped permanent magnets 5, the two permanent magnets 5 are inlaid radially symmetrically in the stator core 1, and the permanent magnets 5 are provided with the stator core In the region corresponding to the radial direction of the stator tooth slot in 1, the direction of the mag...

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Abstract

The invention provides a switched reluctance motor with torque pulsation inhibited by permanent magnetic flux, belongs to the motor field, and aims to solve the problem of unobvious effect of the prior method for inhibiting the torque pulsation of the switched reluctance motor. In the switched reluctance motor, a stator and a rotor both have a salient-pole structure; two permanent magnets are symmetrically embedded along the radial direction inside the external circle surface of a stator core, and are arranged in stator cores corresponding to stator phase windings in the radial direction; the magnetic flux direction generated by the permanent magnets is in accordance with the magnetic flux direction of excitation generated by a stator winding; and the stator winding generates a magnetic field to cover the permanent magnets. When the stator winding is not electrified, the permanent magnets and the stator core form a loop, and do not generate a torque to the motor rotor. After the stator winding is electrified, the torque generated by the permanent magnets is changed into positive from negative; when the torque generated by the permanent magnets is negative, a torque wave crest is inhibited; and when the torque generated by the permanent magnets is positive, a torque wave trough is compensated, so that the torque pulsation of the switched reluctance motor is effectively inhibited.

Description

technical field [0001] The invention relates to a permanent magnet magnetic flux suppressing torque ripple switched reluctance motor, which belongs to the field of motors. Background technique [0002] Due to the advantages of simple structure, convenient control, high reliability and low cost, switched reluctance motor has been valued and recognized by all walks of life. The switched reluctance motor also has the disadvantages of large torque ripple and high noise, which limits the application of switched reluctance motors. Therefore, suppressing the torque ripple of switched reluctance motors has become an important research direction of switched reluctance motors. Existing methods for torque ripple suppression of switched reluctance motors mainly include: motor body parameter optimization, including pole arc coefficient optimization, short magnetic circuit structure, stator and rotor tooth number coordination, etc.; new control strategies, including torque distribution, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/03H02K1/17
Inventor 吴红星赵国平寇宝泉杨旭强李立毅
Owner HARBIN INST OF TECH
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