Speed ​​Estimation Method of pmsm High Frequency Voltage Square Wave Injection Based on Immune Algorithm

Abstract

The invention discloses an immune algorithm based method for estimating the square wave injection rotate speed of PMSM high-frequency voltage. The immune algorithm based method is specifically implemented according to the following steps: step one, injecting a high-frequency voltage square-wave signal in an estimated rotating coordinate system, using a high-pass filter based on immune algorithm on-line optimization to extract high-voltage current response corresponding to the high-frequency square-wave voltage signal; step two, obtaining a rotor position error signal through signal processing by the high-frequency current response obtained in the step one; and step three, estimating the rotate speed and rotor speed of a PMSM by a Romberg observer through the rotor position error signal obtained in the step two. According to the immune algorithm based method for estimating the square wave injection rotate speed of PMSM high-frequency voltage disclosed by the invention, the time constant of the filter is adjusted on line through the online learning immune algorithm, and the purpose of autonomously optimizing the time constant of the filter is reached, so that the actual rotor position is tracked preferably through the rotor position estimated by the high-frequency injection method, and the phase lag caused by the filter is reduced.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, in particular to an immune algorithm-based method for estimating the rotation speed of PMSM high-frequency voltage square wave injection. Background technique [0002] Permanent magnet synchronous motor (Permanent Magnet Synchronous Motor, PMSM) is a complex object with multiple variables, strong coupling, nonlinearity, and variable parameters. It has the advantages of high precision, high dynamic performance, high reliability, and small size. High reliability requirements are widely used in occasions. In recent years, in the permanent magnet synchronous motor vector control system, in order to overcome the defects of high cost, difficult installation and maintenance, reduced anti-interference ability, and reduced reliability caused by the use of mechanical sensors, speed and position information are obtained through various estimation methods The speed sensorl...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a PMSM high-frequency voltage square wave injection speed estimation method based on immune algorithm, which solves the problem that the existing high-frequency voltage square wave injection method causes the estimated rotor position to lag behind the actual rotor position due to the use of filters

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