A Hybrid Control Method for Permanent Magnet Synchronous Induction Motor

Abstract

The invention belongs to the technical field of motor control, and relates to a hybrid control method of a permanent magnet synchronous induction motor. Firstly, a speed detecting unit and a current detecting unit are used for detecting the actual rotating speed parameter and the motor current value of the permanent magnet synchronous induction motor; secondly, the actual rotating speed parameter and the motor current value are sent to a signal controller module and an energy controller module respectively, and the two controller modules work out the control voltage value according to the actual rotating speed parameter, the motor current value and the given rotating speed and sends the control voltage value to a selective switch module; thirdly, the selective switch module selects the control voltage value according to the judgment condition and sends the control voltage value to a three-phase inverter, and the three-phase inverter converts the direct current power source into the three-phase alternating current power source according to the control voltage value to drive the controlled permanent magnet synchronous induction motor, and the stable output of the motor is achieved. The hybrid control method is simple in design principle, safe and reliable, the control steps are simple, the control speed is precise, and the control environment is user friendly.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of motor control, and relates to a hybrid control method for a permanent magnet synchronous induction motor, in particular to a hybrid control method for controlling the speed of a permanent magnet synchronous induction motor by combining energy control and signal control. [0003] Background technique: [0004] The AC servo system plays an increasingly important role in the automatic control system due to its high control precision, constant torque output, fast response and high speed. The existing permanent magnet synchronous induction motor has the advantages of small size, good performance, simple structure, high reliability, large torque and strong robustness, and is widely used in servo systems with high precision and high performance requirements. The synchronous induction motor is a nonlinear electromagnetic energy conversion device, and it is a two-port network. Its input port is an electrica...

AI Technical Summary

Problems solved by technology

[0005] At present, the two control methods of motors are energy control method and signal control method. Hamiltonian System Modeling and Control of Magnetic Synchronous Motor" and other 12 related papers, all of which control the speed of the permanent magnet synchronous induction motor through the port-controlled Hamiltonian method of energy shaping, so that the speed can be obtained at the desired balance point. The minimum value, but this method has the disadvantage of not being able to respond quickly when the parameters or load torque change greatly; traditional control theories and methods such as proportional-integral-derivative control, etc., in the permanent magnet synchronous induction motor speed control Notable achievements have also been made. In this traditional control method, the controller is considered as a processing device that converts the input signal into a corresponding output signal, so it is called signal control. Its control goal is to make the permanent magnet synchronous induction The motor control system is affected by nonlinear and uncertain factors, and the controller keeps the system to minimize the error signal and reduces the influence of the interference signal on the output; although this method is applied to the speed control of the permanent magnet synchronous induction motor, it has achieved certain results , but there are still many defects; the applicant also retrieved "Speed ​​Control of Permanent Magnet Synchronous Motor Based on RBF Neural Network" published by Qiang Yong, Ling Youzhu and Jia Mianqian in "Micro Motor" 2013 Issue 4, etc. 37 articles also involve traditional control methods, all of which are proportional-integral-derivative methods and their combination with other methods to control the speed of permanent magnet synchronous induction motors. Although the simple use of proportional-integral-derivative methods has the characteristics of fast response , but there is a disadvantage of static error. Although the combination with other methods reduces the static error, it makes the response speed decrease

Images