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Switched reluctance motor vibration and noise reduction method based on motor structure characteristics

A switched reluctance motor, vibration reduction and noise reduction technology, applied in the direction of motor vibration suppression, AC motor control, electrical components, etc., can solve the problems of limited vibration reduction and noise reduction effect, poor torque pulsation effect, etc. Low, simple operation, to achieve the effect of uniform distribution

Active Publication Date: 2020-08-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this scheme uses an iterative sliding mode variable structure speed controller in the speed loop, although it can reduce the error between the actual output speed and the expected speed, it is not effective in suppressing the torque ripple caused by commutation.
Studies have shown that the vibration and noise problems of switched reluctance motors are mainly caused by the radial deformation of the stator caused by its radial force pulsation. Therefore, the effect of reducing vibration and noise of the motor by limiting torque pulsation is limited

Method used

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  • Switched reluctance motor vibration and noise reduction method based on motor structure characteristics
  • Switched reluctance motor vibration and noise reduction method based on motor structure characteristics
  • Switched reluctance motor vibration and noise reduction method based on motor structure characteristics

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Embodiment

[0035] figure 1 It is a flow chart of the vibration reduction and noise reduction method of the switched reluctance motor based on the structural characteristics of the motor in the present invention.

[0036] In this example, if figure 1 As shown, a method for reducing vibration and noise of a switched reluctance motor based on the structural characteristics of the motor in the present invention comprises the following steps:

[0037] S1, build the transfer function H (s) between the vibration acceleration a (s) of the switched reluctance motor stator and the radial force F (s);

[0038]

[0039] Among them, i represents different modal orders, n is the lowest modal order, m is the highest modal order; ω i is the natural angular frequency of the i-order mode, ω i =2πf i , f i is the natural frequency of the i-order mode; ξ i is the damping ratio of the i-order mode; A i is the gain of the transfer function in the i-order mode; s is the Laplace variable;

[0040] S2...

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Abstract

The invention discloses a switched reluctance motor vibration and noise reduction method based on motor structure characteristics. The method comprises constructing a transfer function H (s) between aswitched reluctance motor stator vibration acceleration a (s) and a radial force F (s); determining parameters of the transfer function; drawing a Bode diagram of the transfer function H (s) throughmatlab; finding the frequency corresponding to the minimum value of the transfer function H (s) H (s) in the interval [fn fm] in the Bode diagram; finally, based on a conventional switched reluctancemotor control strategy, injecting sinusoidal signals with frequency changes into the turn-off angle theta off of the traditional switched reluctance motor, so that a new turn-off angle is generated. Thus, the switched reluctance motor achieves uniform distribution of motor vibration energy under the control of the turn-off angle theta' off, and then vibration and noise reduction of the switched reluctance motor are achieved.

Description

technical field [0001] The invention belongs to the technical field of switched reluctance motors, and more specifically relates to a vibration and noise reduction method for switched reluctance motors based on the structural characteristics of the motor. Background technique [0002] Due to its simple structure, low price, high reliability, wide speed range and ability to work in harsh environments, switched reluctance motors have great development in aerospace, new energy power generation, electric vehicles, machine tool spindle drive household appliances and other fields potential. However, the special double salient pole structure and pulse power supply mode of switched reluctance motor lead to serious vibration and noise problems, which limits its application in products with strict noise level restrictions. [0003] In order to reduce the vibration and noise of switched reluctance motors, a Chinese patent for a vibration and noise reduction system for switched relucta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/08H02P23/04H02P6/34
CPCH02P25/08H02P23/04H02P6/34Y02T90/00
Inventor 张蔓胡维昊李坚黄琦谢鸿钦张真源杜月芳孙敏井实陈健军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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