Hybrid-excitation synchronous motor nonlinear reverse tracking control method

Abstract

The invention discloses a hybrid-excitation synchronous motor nonlinear reverse tracking control method. The method comprises the following steps of collecting signals from a motor main circuit and sending to a controller for processing; carrying out accurate initial position detection on a motor and acquiring a rotor position angle and an angular speed; converting a collected three-phase currentinto a d-q coordinate system; sending an angular speed tracking error, the angular speed and a direct current bus voltage to a speed reverse tracking controller, determining a motor operation intervaland calculating reference values of the motor in the different operation intervals; inputting a current tracking error and the angular speed into a current reverse tracking controller so as to calculate and acquire the reference values; and finally driving a main power converter and an excitation power converter. By using the hybrid-excitation synchronous motor nonlinear reverse tracking controlmethod, the system is designed simply, an adjustable parameter of the system is reduced, a motor torque ripple is small, a dynamic response capability of the motor is increased, and advantages of a low speed, a high torque and a wide speed regulation range of a hybrid-excitation synchronous motor are fully used.

Description

technical field [0001] The invention belongs to the technical field of hybrid excitation synchronous motor control, and in particular relates to a nonlinear reverse push tracking control method for a hybrid excitation synchronous motor. Background technique [0002] As a new type of electric vehicle drive motor, the hybrid excitation synchronous motor has an additional set of DC excitation sources compared with the permanent magnet synchronous motor. By adjusting the excitation current in the DC excitation winding, not only low-speed high-torque output can be achieved to meet the requirements of vehicle starting, climbing and heavy load, but also wide speed range operation can be realized to meet the requirements of high-speed cruise of electric vehicles. Within a certain speed range, the electric vehicle can keep working efficiently, thereby increasing the cruising range of the electric vehicle. Therefore, the hybrid excitation synchronous motor is suitable as the drive mo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid excitation synchronous motor nonlinear backtracking tracking control method to solve the problems of slow dynamic response and many adjustment parameters in the existing hybrid excitation synchronous motor control technology

Images