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High-speed PMSM harmonic suppression control method based on LC filter and adaptive notch filter

An adaptive notch filter, LC filter technology, applied in the control system, motor control, control of generators, etc., can solve the problem of affecting the performance of the motor system, reducing the working efficiency of the motor system, large harmonic current noise, iron core loss and Torque ripple, etc.

Active Publication Date: 2020-10-30
XI AN JIAOTONG UNIV
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Problems solved by technology

Large amounts of harmonic currents can generate high noise, core loss and torque ripple, which can affect the performance of the motor system
The existing high-speed PMSM h

Method used

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  • High-speed PMSM harmonic suppression control method based on LC filter and adaptive notch filter
  • High-speed PMSM harmonic suppression control method based on LC filter and adaptive notch filter
  • High-speed PMSM harmonic suppression control method based on LC filter and adaptive notch filter

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Embodiment Construction

[0043] The present invention is described in further detail below in conjunction with accompanying drawing:

[0044] refer to figure 1 , the high-speed PMSM harmonic suppression control method based on LC filter and adaptive notch filter of the present invention comprises the following steps:

[0045] 1) Obtain the characteristic parameters of the high-speed PMSM;

[0046] The characteristic parameter of described high-speed PMSM comprises the size of high-speed PMSM (motor), pole pair number, stator rotor part parameter, rated voltage, rated torque, rated speed and rated power;

[0047] 2) according to the characteristic parameter of the high-speed PMSM that step 1) obtains, adopt differential equation to set up the mathematical equation expression of this high-speed PMSM, to set up the mathematical model of high-speed PMSM;

[0048] Step 2) the establishment process of the mathematical model of high-speed PMSM is:

[0049] Using equal-amplitude coordinate transformation, ...

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Abstract

The invention discloses a high-speed PMSM harmonic suppression control method based on an LC filter and an adaptive notch filter. The method comprises the following steps: 1) obtaining characteristicparameters of a high-speed PMSM; 2) according to the characteristic parameters of the high-speed PMSM obtained in the step 1), establishing a mathematical equation expression of the high-speed PMSM byadopting a differential equation so as to establish a mathematical model of the high-speed PMSM; 3) establishing a mathematical model of the high-speed PMSM with an LC filter; 4) obtaining a transferfunction of a motor control system according to the mathematical model of the high-speed PMSM with the LC filter established in the step 3), and then performing amplitude-frequency characteristic analysis according to the transfer function of the motor control system to obtain the resonant frequency of the PMSM; and 5) setting a self-adaptive wave trap according to the resonant frequency of the PMSM obtained in the step 4), and filtering a resonance peak at the resonant frequency through the self-adaptive wave trap. According to the method, the working efficiency, stability and anti-interference capability of a motor system can be effectively improved.

Description

technical field [0001] The invention relates to a high-speed PMSM harmonic suppression control method, in particular to a high-speed PMSM harmonic suppression control method based on an LC filter and an adaptive notch filter. Background technique [0002] High-speed PMSM has high power density, small rotor inertia and fast dynamic response. It can be directly connected with the prime mover and the load, and the mechanical transmission device is omitted, so the reliability is high. In recent years, with the development of power electronics technology and high-performance processors, the application fields of high-speed PMSMs are becoming more and more extensive. High-speed PMSMs are widely used in turbo blowers, turbo compressors, machine tools, vacuum cleaners, generators and other fields. [0003] The stator inductance of high-speed permanent magnet synchronous motor is usually very small, generally less than 0.5mH. When a voltage-type inverter is used for driving, since...

Claims

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Application Information

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IPC IPC(8): H02P29/50H02P21/00H02P21/05H02P25/022H02P6/34H02P6/10
CPCH02P29/50H02P21/0003H02P21/05H02P25/022H02P6/34H02P6/10H02P2207/05
Inventor 杜锦华赵晓东
Owner XI AN JIAOTONG UNIV
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