Permanent magnet synchronous motor control method based on integral type high-order terminal sliding mode algorithm

Abstract

The invention belongs to the technical field of motor control, and in particular relates to a permanent magnet synchronous motor control method based on an integral type high-order terminal sliding mode algorithm. The method comprises the following steps: respectively designing a d-axis first-order finite time controller and a q-axis integral type high-order terminal sliding mode controller, and respectively inputting the d-axis voltage of the d-axis first-order finite time controller and the q-axis voltage of the q-axis integral type high-order terminal sliding mode controller into a permanent synchronous motor, thereby driving the permanent synchronous motor to run, wherein a position signal theta and a mechanical angle speed omega of the permanent synchronous motor are measured by a position and speed sensor. Compared with the traditional control method, the anti-interference performance of the permanent synchronous motor is greatly improved, and the closed-loop system state can converge to a balancing point within the finite time by use of the control method of the permanent synchronous motor; therefore, the permanent synchronous motor control method has better convergence.

Description

technical field [0001] The invention belongs to the technical field of motor control, in particular to a permanent magnet synchronous motor control method based on an integral high-order terminal sliding mode algorithm. Background technique [0002] Because the permanent magnet synchronous motor has the characteristics of simple structure, small size, high operating efficiency, and small moment of inertia, it is widely used in aerospace, numerical control machine tools, electric vehicles and other fields, but the permanent magnet synchronous motor is a nonlinear, multivariable , strong coupling, and variable parameter complex systems, there are many unfavorable factors such as current coupling, system saturation, parameter perturbation and external disturbance, which directly affect the improvement of the performance of the control system. At present, for the motor servo control system, most of the control systems are still based on the traditional PI control scheme. [000...

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Problems solved by technology

[0003] With the development of modern control theory, there are also many nonlinear control methods applied to servo motor control systems, such as adaptive control, sliding mode control, fuzzy control methods, etc., although these control methods can theoretically guarantee the closed-loop system. Stability, but in the motor position servo system, external disturbances are always inevitable, which greatly reduces the control performance of the system, so it is urgent to propose a permanent magnet synchronous motor that can simultaneously improve the anti-interference performance of the permanent magnet synchronous motor Control Method

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