A control method for permanent magnet synchronous motor based on generalized model prediction

Abstract

The invention provides a generalized model prediction-based permanent magnet synchronous motor control method. The control method is realized based on a rotary speed and current dual-closed-loop structure; a rotary speed ring controller adopts a classical PI controller; a current ring controller adopts a novel current ring control method; current feedback values in the current period and the lastperiod and a current reference value are used as the input of a current regulator; and a weighting coefficient can be obtained through pole location configuration. By virtue of the control method, theproblem of difficulty in algorithm realization caused by the fact that the conventional generalized model prediction controller parameter is regulated based on experience is solved; the non-determined parameter is determined by a direct configuration pole location mode, so that the system can realize relatively excellent control performance; in addition, the problem that the conventional PI control cannot realize random pole location configuration can be solved; the pole location can be directly determined, so that all problems in the two conventional control modes can be solved; and it is ensured that the designed system is in a stable state, and the system has relatively high dynamic performance.

Description

technical field [0001] The invention belongs to the technical field of motors, and relates to a motor control method, more specifically, to a novel permanent magnet synchronous motor current loop control method based on generalized model predictive control. Background technique [0002] The permanent magnet synchronous motor has the characteristics of high efficiency, small size and simple structure. In recent years, it has been widely used in aerospace, home appliances, and electric vehicles. However, the main control method at this stage is PI control. Due to the unique form of PI, the control bandwidth of this method is not very high. Secondly, because the control object, that is, the pole of the motor will change with the change of the speed, the traditional control method is adopted. It is difficult for PI control to achieve a high-performance control characteristic in the range of full speed. [0003] The generalized model predictive control, as a relatively new cont...

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Problems solved by technology

[0004] In order to improve the bandwidth of the current loop, solve the problem that the traditional PI control is easy to be saturated, the dynamic response is slow, and the calculation amount of the traditional generalized predictive control is relatively large, the hardware requirements are high and the parameters are difficult to select, the present invention discloses a generalized predictive control based Compared with the traditional generalized model predictive control, the current controller is based on the configuration of the pole position, which ensures the stability of the system and the high bandwidth characteristics of the current loop, and compared with the traditional generalized model Predictive control method is easier to implement

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