Permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation error

Abstract

The invention relates to the field of motor control, and discloses a permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation errors, the system obtains equivalent counter electromotive force information through a sliding mode observer, then adopts a counter electromotive force fundamental wave construction method, and outputs an equivalent counter electromotive force fundamental wave observation value by using a fundamental wave reconstruction module; and eliminating a harmonic component in the counter electromotive force to obtain a counter electromotive force fundamental wave, and finally obtaining the rotor position and rotating speed estimation value of the motor through an orthogonal phase-locked loop, thereby improving the rotor position and rotating speed precision, and keeping better dynamic performance of the system. Compared with the prior art, the method adopts a counter electromotive force fundamental wave reconstruction method, eliminates the harmonic component of a counter electromotive force observation value, and uses the counter electromotive force observation value to estimate the rotor position and rotation speed, thereby greatly improving the observation precision of the rotor position and rotation speed, and maintaining the good dynamic performance of the system.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a position sensorless control method, system and device for a permanent magnet synchronous motor that eliminates fluctuation errors in observation values, and is particularly suitable for applications in high-speed position sensorless control of permanent magnet synchronous motors. Background technique [0002] Vehicle drive motor is one of the key executive components of hybrid electric vehicles and electric vehicles, and its driving performance directly affects the vehicle performance of hybrid electric vehicles and electric vehicles. At present, the driving motors for vehicles mainly adopt permanent magnet synchronous motors, which have the advantages of high power density, high efficiency, and low operating noise. In order to realize the high-performance control of permanent magnet synchronous motors, the detection of motor rotor position and speed information is esse...

AI Technical Summary

Problems solved by technology

[0005] However, in practical applications, the filters used by these traditional methods will cause phase lag, which will affect the system dynamic performance

The existence of the fluctuation error of the estimated value deteriorates the control performance of the position sensorless permanent magnet synchronous motor

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