PMSM inversion terminal sliding mode control method

Abstract

The invention provides an inversion terminal sliding mode control method based on a load torque observer for a permanent magnet synchronous motor (PMSM) speed control system. An extended state observer is used to estimate a load torque in real time, and the real-time estimated load torque is introduced into the output of the speed loop to give a q-axis current to form feedforward compensation so as to enhance the ability of the system to resist load disturbance. Aiming at the perturbation problem of motor parameters in the design of current loop, the idea of high-order terminal sliding mode control is introduced, and the high-order terminal sliding mode control method of d and q currents is designed, so that the current tracks the current given value in the limited time to ensure the stability of the speed control system and achieve robustness to motor parameter perturbation.

Description

technical field [0001] The invention relates to a method for inversion terminal sliding mode control based on electric vehicle PMSM, in particular to an inversion terminal sliding mode control method based on a load torque observer. Background technique [0002] The full name of PMSM is permanent magnet synchronous motor, that is, permanent magnet synchronous motor. Motion control is the key demand of many household appliances, such as dryers, washing machines, refrigerators, air conditioners and various kitchen appliances. In order for these devices to work at their optimum performance, new and improved motor control technology is key. In addition, not only does increased energy efficiency benefit everyone, new technologies can also offer additional benefits such as smoother work and dramatically reduced noise levels. [0003] In order to improve the dynamic and static performance, the backstepping controller and fuzzy control are combined and applied to the speed tracking...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the dynamic and static performance, the backstepping controller and fuzzy control are combined and applied to the speed tracking control of the permanent magnet synchronous motor to achieve better dynamic and static performance, but the system design is more complicated and requires rich experience

Since the permanent magnet synchronous motor is a complex object with multiple variables, strong coupling, nonlinearity, and variable parameters, and is easily affected by external disturbances, traditional linear controllers such as PI, PID and other controllers have been difficult to meet the high-performance control requirements.

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