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Motor harmonic suppression method based on SVPWM (Space Vector Pulse Width Modulation) control and related equipment

A technology of harmonic suppression and motor speed, applied in control systems, AC motor control, electronic commutation motor control, etc., can solve the problems of narrow random number selection range, poor harmonic suppression effect, etc., to suppress harmonic signals Effect

Pending Publication Date: 2022-04-22
中科意创(广州)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The applicant further researched the above scheme and found that the selection range of random numbers in the above scheme is relatively narrow. Although the harmonics at the natural frequency of the permanent magnet synchronous motor are further eliminated, the suppression effect on the harmonics at other natural frequencies is not good.

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  • Motor harmonic suppression method based on SVPWM (Space Vector Pulse Width Modulation) control and related equipment
  • Motor harmonic suppression method based on SVPWM (Space Vector Pulse Width Modulation) control and related equipment
  • Motor harmonic suppression method based on SVPWM (Space Vector Pulse Width Modulation) control and related equipment

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[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] In order to suppress the harmonics at various frequencies in the motor based on SVPWM control as widely as possible, the application discloses a method for suppressing the harmonics of the motor based on SVPWM control, see figure 1 , the method can include:

[0051] Step S101: Generate a random variable frequency period.

[0052] Before implementing the technical solutions disclosed in the embodiments of the present application, the power tube switchin...

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Abstract

The invention provides a motor harmonic suppression method based on SVPWM (Space Vector Pulse Width Modulation) control and related equipment, and the method comprises the steps: employing a random frequency conversion period to adjust a switching period and a sampling period of a power tube based on SVPWM control, employing the adjusted switching period to control the power tube, employing the adjusted sampling period to carry out sampling, and employing the sampling period to carry out harmonic suppression. Harmonic waves in the motor based on SVPWM control are suppressed through the switching period and the sampling period which change randomly, and harmonic wave signals in the motor can be effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a motor harmonic suppression method based on SVPWM control and related equipment. Background technique [0002] Space Vector Pulse Width Modulation (SVPWM) technology is widely used in permanent magnet synchronous motor control. This technology is generated by a specific switching mode composed of six power switching tubes of a three-phase power inverter. The pulse width modulation wave of the control output current waveform is as close as possible to the ideal sine wave, and compared with other modulation algorithms, SVPWM can improve the utilization rate of the DC bus voltage, so that the permanent magnet synchronous motor can obtain greater power output. [0003] The modulation of the SVPWM carrier adopts a fixed switching frequency, which will cause serious distortion of the three-phase current output by the motor at its switching frequency and its multiplier, that is, ...

Claims

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Application Information

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IPC IPC(8): H02P27/10H02P6/00G01R21/127
CPCH02P27/10H02P6/007G01R21/127
Inventor 张世博任广辉王云卢苗詹圣益王文洲卢慧超
Owner 中科意创(广州)科技有限公司