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Adaptive filtering control method in sensorless control and control device

A technology of adaptive filtering and control method, applied in control systems, electronic commutation motor control, electronic commutator, etc. Effect

Active Publication Date: 2020-02-11
中山绿威科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides an adaptive filter control method and control device in sensorless control to solve the problem of poor adaptability of filter algorithm for degaussing phenomenon in traditional sensorless control

Method used

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  • Adaptive filtering control method in sensorless control and control device
  • Adaptive filtering control method in sensorless control and control device
  • Adaptive filtering control method in sensorless control and control device

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0038] Such as figure 1 As shown, the present invention provides a kind of adaptive filtering control method in sensorless control, comprising:

[0039] Step S1: Obtain the phase inductance and phase resistance of the brushless DC motor;

[0040] Step S2: obtaining the working current of the brushless DC motor during operation;

[0041] Step S3: According ...

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Abstract

The invention discloses an adaptive filtering control method in sensorless control. The method comprises steps of acquiring phase inductance and phase resistance of a brushless direct current motor; obtaining a working current of the brushless direct current motor in operation; calculating the action time of demagnetization according to the phase inductance, the phase resistance and the working current of the brushless direct current motor; calculating the filtering comparison times in the adaptive filtering process according to the action time of demagnetizatio; according to the filtering frequency and the filtering comparison frequency, executing adaptive filtering; when the filtering frequency is greater than or equal to the filtering comparison frequency, executing commutation; when the filtering frequency is smaller than the filtering comparison frequency, not executing commutation. The method is advantaged in that quantification of the action time of demagnetization is equivalently realized through a circuit, and the number of filtering times is scientifically determined so as to realize adaptive filtering.

Description

technical field [0001] The invention relates to the field of brushless DC motor control. More specifically, it relates to an adaptive filter control method and control device for demagnetization in sensorless control. Background technique [0002] Brushless DC motor is a kind of permanent magnet synchronous motor, which has the advantages of high efficiency, fast response and low noise. [0003] In the square wave sensorless control, there is a freewheeling problem in the non-conducting phase during the commutation process, resulting in demagnetization of the back electromotive force waveform, and the increase of the load current will cause the degaussing phenomenon to intensify. At present, the common practice is to adopt the method of empirical filtering, which does not consider the size of the operating current and the phase inductance characteristics of the brushless DC motor. This method has poor adaptability. [0004] According to the size of the working current, the...

Claims

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Application Information

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IPC IPC(8): H02P6/18
CPCH02P6/182
Inventor 王浩陈魏海峰张彬李震张懿
Owner 中山绿威科技有限公司
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