Abstract
In order to improve the accuracy of the speed and angle estimation of the permanent magnet synchronous motor (PMSM) in the sensorless mode, this paper firstly proposes a multi-sliding mode scheme based on model reference adaptive system (MRAS) with proportional integral (PI) control. The current disturbance of the sensorless method is suppressed by the multi-sliding mode based on MRAS method, thus reducing the disturbance of the current to the PI and indirectly improving the current anti-interference of the PI. Meanwhile, the quantitative analysis of the current disturbance by the MRAS based on multi-sliding mode scheme is presented in detail. Then, the suppression capability of different sliding-mode schemes is discussed. Finally, various experiments are designed to verify the feasibility of the scheme and the correctness of the theory.
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