Error feedback-based model prediction current loop control method for permanent magnet synchronous motor

Abstract

An error feedback model prediction-based current loop control method for a permanent magnet synchronous motor comprises the following steps of: calculating the measured current, rotating speed and rotor position of the permanent magnet synchronous motor to obtain a voltage value which should be applied at the current moment, calculating according to the voltage value to obtain a switching instruction of an inverter, and applying the switching instruction to the inverter to control the current loop of the permanent magnet synchronous motor. Compared with traditional model prediction control based on vector control, the method has the advantages that the decoupling effect is better, and the dynamic response is faster; the method is deadbeat model prediction control based on the SVPWM technology, and the thought of the method is that switching signals of the inverter at the next moment are predicted according to mathematical models of the motor and the inverter, the method is easy to implement and fast in dynamic response, a prediction model is calibrated by introducing error feedback, and the response speed and the steady-state precision of the system are improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a current loop control method of a permanent magnet synchronous motor based on error feedback model prediction. Background technique [0002] Since the 1980s, permanent magnet synchronous motors have been widely used in new energy vehicles, robots, aerospace, wind power generation and high-performance medical equipment due to their high power density and high efficiency. Breakthroughs in related supporting technologies such as , power electronics technology, computer technology, etc., make the precise control of permanent magnet synchronous motor assistants simple. [0003] However, in many occasions, the requirements for motor control performance are getting higher and higher, the response speed and overshoot of the classic PI vector control of permanent magnet synchronous motor are mutually restricted, and the problems such as poor anti-interf...

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Problems solved by technology

[0003] However, in many occasions, the requirements for motor control performance are getting higher and higher. The classic PI vector control response speed and overshoot of permanent magnet synchronous motors are mutually restricted, and problems such as poor anti-interference ability are difficult to meet the control requirements of cutting-edge fields. In order to better utilize the advantages of the permanent magnet synchronous motor body and adapt to the development needs of intelligence, it is necessary to introduce advanced control strategies into the permanent magnet synchronous motor control system. Compared with other control methods, model predictive control has a faster dynamic response speed. , high-precision tracking control and other advantages

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