High-speed pmsm harmonic suppression control method based on lc filter and adaptive notch filter

Abstract

The invention discloses a high-speed PMSM harmonic suppression control method based on an LC filter and an adaptive notch filter, comprising the following steps: 1) obtaining characteristic parameters of the high-speed PMSM; 2) obtaining the characteristics of the high-speed PMSM according to step 1) Parameter, 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; 3) set up the mathematical model of the high-speed PMSM of band LC filter; 4) according to step 3) set up the band LC filter The mathematical model of high-speed PMSM obtains the transfer function of the motor control system, then carries out the amplitude-frequency characteristic analysis according to the transfer function of the motor control system, and obtains the resonant frequency of the PMSM; 5) according to the resonant frequency of the PMSM obtained in step 4), set the adaptive Notch filter, and the resonance peak at the resonance frequency is filtered through the adaptive notch filter. This method can effectively improve the working efficiency, stability and anti-interference ability of the motor system.

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...

AI Technical Summary

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 harmonic suppression control methods mostly use pure hardware methods, which will reduce the working efficiency of the motor system with the heat consumed by the resistors.

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