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A Method of Reducing the Noise of Switched Reluctance Motor Based on Adjusting PWM Carrier Frequency

A switched reluctance motor, carrier frequency technology, applied in AC motor control, motor vibration suppression control, electrical components and other directions, can solve the problems of resonance noise, large noise, etc., to achieve the effect of simple implementation, noise reduction, and overall noise reduction

Active Publication Date: 2020-12-01
SOUTHEAST UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that the noise of the above-mentioned switched reluctance motor is relatively large during operation, and proposes a method for reducing motor noise based on adjusting the PWM carrier frequency, which can solve the problem of resonance caused by the coincidence of the frequency component of the electromagnetic force and the natural frequency of the stator noise problem

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  • A Method of Reducing the Noise of Switched Reluctance Motor Based on Adjusting PWM Carrier Frequency
  • A Method of Reducing the Noise of Switched Reluctance Motor Based on Adjusting PWM Carrier Frequency
  • A Method of Reducing the Noise of Switched Reluctance Motor Based on Adjusting PWM Carrier Frequency

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[0025] The specific method and operation process provided by the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0026] Operation flowchart of the present invention is as figure 1 As shown, before the switched reluctance motor runs, set the PWM carrier initial frequency f 0 (①), and set the carrier frequency unit offset Δf and the maximum offset n*Δf (②), Δf is the change of the carrier frequency when the motor runs for one cycle, and n*Δf is the PWM carrier The frequency deviates from the fundamental frequency f 0 The maximum offset value of . The microprocessor judges the rotor position signal of the switched reluctance motor through the Hall signal transmitted by the Hall position signal sensor, and converts the Hall signal input into the microprocessor into the motor rotor position signal after calculation (③④), and then according to the actual The mechanical angle corresponding to one cycle of the contro...

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Abstract

The invention discloses a method for reducing the noise of a switched reluctance motor based on adjusting the PWM carrier wave, changing the switching frequency by changing the PWM carrier frequency, destroying the periodicity of the excitation, thereby destroying the periodicity of the radial electromagnetic force, and avoiding the frequency spectrum of the electromagnetic force The coincidence of the component and the natural frequency of the stator causes resonance, thereby achieving the purpose of reducing noise. The method for reducing the noise of the switched reluctance motor based on adjusting the PWM carrier wave proposed by the present invention is to reduce the noise of the switched reluctance motor from the control direction, has a wide range of applications, does not affect other performance parameters, and does not require hardware circuit assistance, and the application cost is low ,Easy to implement.

Description

technical field [0001] The invention relates to motor control, especially a method for reducing the noise of switched reluctance motors based on adjusting the PWM carrier frequency. The method constantly changes the carrier frequency of the PWM output by the microprocessor, disturbs the periodicity of the excitation, and then destroys the cycle of the electromagnetic force To prevent the change frequency of the electromagnetic force from overlapping with the natural frequency of the stator, and reduce the noise and vibration of the motor. Background technique [0002] As a new type of speed control drive system, switched reluctance motor has the advantages of both AC and DC speed control systems, such as simple structure, small size, low cost, high efficiency, high reliability and not limited by rare earth resources etc., and occupy an increasingly important position in the motor drive system. However, due to its doubly salient pole structure and discontinuous coil excitati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P25/098H02P23/04
CPCH02P25/098H02P23/04H02P25/08H02P27/085
Inventor 钟锐张铭书张森肖金玉苏巍孙伟锋时龙兴
Owner SOUTHEAST UNIV
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