Finite time adaptive compound control method and system for permanent magnet synchronous motor

Abstract

The invention discloses a permanent magnet synchronous motor finite time self-adaptive compound control method and a permanent magnet synchronous motor finite time self-adaptive compound control system. In order to improve the rotating speed tracking performance and the anti-interference and anti-parameter perturbation capability of a permanent magnet synchronous motor control system, the invention provides a permanent magnet synchronous motor finite time self-adaptive compound control method and a permanent magnet synchronous motor finite time self-adaptive compound control system. The system comprises a controlled object, a Park inverse transformation unit, an encoder, a current loop finite time controller, a finite time sliding mode state observer, a finite time adaptive feedback controller, a Park transformation unit, a Clark transformation unit, an SVPWM system and an inverter. According to the invention, a finite time sliding mode state observer is combined with a finite time self-adaptive feedback controller, and finite time control of current loops id and iq is introduced, so that the rotating speed convergence speed of the permanent magnet synchronous motor is increased, the anti-interference and anti-parameter perturbation capabilities are improved, the dynamic stability is improved, and the method has good robustness for motor parameters.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control systems, and proposes a limited-time self-adaptive compound control method and system for permanent magnet synchronous motors. Background technique [0002] A permanent magnet synchronous motor (PMSM) is an AC drive system that uses a permanent magnet synchronous motor as the drive motor. It uses permanent magnets instead of the field winding of an electric excitation motor. With the rapid development of new materials, mechatronics, power electronics, computers, control theory and other related new technologies, the permanent magnet synchronous motor control system has opened up a wide range of application fields, which can achieve high speed, high precision and high stability. High-speed, fast response, energy-efficient motion control. The control strategies of permanent magnet synchronous motors are mainly divided into: vector control, direct torque control and variable...

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that although the control system adopts variable speed approach, the chattering problem of sliding mode control cannot be completely solved, and the chattering problem still exists in the whole system during the control process.

The disadvantage of this invention is that chattering cannot be eliminated, and the performance of fast convergence cannot be obtained

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