Permanent magnet synchronous motor finite time dynamic surface control method considering iron loss

Abstract

The invention belongs to the technical field of permanent magnet synchronous motor position tracking control, and particularly discloses a permanent magnet synchronous motor finite time dynamic surface control method considering iron loss. Aiming at the problems of iron loss and input saturation existing in the permanent magnet synchronous motor, a dynamic surface technology is introduced into a traditional backstepping method to solve the problem of 'calculation complexity' in the calculation process, and meanwhile, a fuzzy logic system is used to approximate unknown nonlinear terms in a permanent magnet synchronous motor driving system. According to the method, through the finite time control technology, the system response speed is increased, and tracking errors are reduced; it can be guaranteed that the tracking errors of the system converge to a neighborhood which is small enough of an original point, and therefore, the response speed of the permanent magnet synchronous motor driving system is increased; and the method provided by the invention has good robustness and strong load disturbance resistance, and realizes an ideal control effect.

Description

technical field [0001] The invention belongs to the technical field of position tracking control of permanent magnet synchronous motors, and in particular relates to a limited-time dynamic surface control method of permanent magnet synchronous motors considering iron loss. Background technique [0002] Permanent magnet synchronous motors have been widely used in industry, manufacturing and other fields due to their simple structure, small size, high efficiency, and high power factor. However, the permanent magnet synchronous motor has the characteristics of multi-variable, highly nonlinear and strong coupling, so how to overcome the above control difficulties to achieve accurate and effective control of the permanent magnet synchronous motor is of great significance. [0003] At present, researchers have proposed many control methods for nonlinear systems, such as backstepping control, direct torque control, Hamiltonian control, and sliding mode control. However, permanent ...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a finite-time dynamic surface control method for permanent magnet synchronous motors considering iron loss, to solve the adverse effects of iron loss and input saturation on the system, and to ensure the tracking control effect of permanent magnet synchronous motors

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