Permanent magnet synchronous motor control method based on motion trend multi-model adaptive mixed control

Abstract

The invention provides a permanent magnet synchronous motor control method based on motion trend multi-model adaptive mixed control. The method comprises steps: s1, discretization is carried out on a motor mathematical model, and an input output three-order discrete model is obtained; s2, a change interval is decomposed to obtain sub intervals, a sub model is built in each sub interval, a multi-model set is acquired, and finally, robust H-infinity is adopted to design a robust sub controller; s3, mixed signals of each sub model participating in mixing are solved, the weight for mixing of the sub model parameters is pre-judged again, the two kinds of mixed signals are integrated and normalized, and integrated mixed signals of each sub model participating in mixing in an overlapped interval are obtained; and s4, according to the integrated mixed signals, a controller for a controlled object mixed controller is solved. Compared with the prior art, the method still has good working performance while parameters of the permanent magnet synchronous motor change.

Description

technical field [0001] The invention is mainly aimed at the control process of the permanent magnet synchronous motor, and is a method for solving the problem that the original controller cannot meet the control performance of the motor due to the change of the parameters of the permanent magnet synchronous motor due to the heat generated in the process of the permanent magnet synchronous motor. [0002] technical background [0003] The permanent magnet synchronous motor has simple structure, small size, light weight, low loss and high efficiency. Compared with the DC motor, it does not have the commutator and brush of the DC motor, and does not require reactive excitation current, so the efficiency is high. , high power factor, large moment-to-inertia ratio, small stator current and electronic resistance loss, measurable rotor parameters, and good control performance. Therefore, the motor is widely used in aerospace, robotics and other fields. Therefore, the permanent magn...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a permanent magnet synchronous motor control method based on motion trend multi-model adaptive hybrid control, to solve the problem of parameter uncertainty caused by the change of motor parameters caused by the permanent magnet synchronous motor due to work heating, It can ensure good speed regulation performance and good transient performance of the motor when the motor parameters change within a certain range

[0006] In order to solve the control problem that some parameters of the permanent magnet synchronous motor change within a certain range, a novel control method must be adopted-a multi-model adaptive hybrid control method based on motion trend

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