永磁同步电动机的转速跟踪控制

Speed Tracking Control of Permanent Magnet Synchronous Motors

针对永磁同步电动机(PMSM)研究了其建模与转速控制问题。建立PMSM的机理模型,引入线性变换将所得时变模型转换为线性定常模型。为实现无静差跟踪控制,在闭环系统的内部重现一个扰动信号的不稳定模型,并将输出跟踪误差作为其输入与被控对象串联,从而使跟踪误差非零时,控制器总会输出一个信号作用于被控系统,如此实现无静差跟踪。给出了被控系统实现无静差地跟踪给定参考的充分必要条件,实验结果证明了所提方法的有效性。

The problem of modeling and speed control of permanent magnet synchronous motors（PMSM） is studied in this paper. First, a model of the PMSM mechanism is established. A linear transform is introduced to convert the time-varying model to a linear time-invariant model. In order to realize no-steady-error tracking control, an unsteady model of disturbance signal is reproduced in a closed loop system, and the output error is made to equal its input so that this model is connected with the controlled system. Therefore, any non-zero output tracking error will produce a control signal to the controlled system until the tracking error becomes zero. The conditions under which the controlled system can get the no-steady-error tracking are given. Experi mental results show effectiveness of the proposed method.