对一种基于模型参考自适应系统( MRAS)的内置式永磁同步电机( IPMSM)无位置传感器矢量控制策略进行了研究。该控制策略仅需很少的参数就可以估算出电机转速。该控制策略中,IPMSM本身作为参考模型,将含有待估参数的IPMSM数学模型作为可调模型,这两个模型的输出之差驱动自适应律,从而获得估算转速。在MRAS中引入比例积分环节,提高了系统的动态性能。该控制策略实现了IPMSM在极低速0.5 Hz下的运行。仿真结果表明：提出的控制策略有良好的动态响应和稳态响应,估算转速有较高的精度,系统有较强的鲁棒性,IPMSM在极低速下运行良好。%One novel control strategy for IPMSM sensorless control based on MRAS was presented. This control strategy can estimate the rotor speed with a few parameters. IPMSM itself was selected as reference model, and the mathematical model of IPMSM which includes estimated parameters was regarded as adaptive model. The output error of these two models was used to drive the adaption mechanism and the estimated speed was obtained. Also the PI control in MRAS to increase the dynamic performance was introduced. Using this control strategy, IPMSM could work under very low speed condition of 0. 5 Hz. The simulation results verify the proposed control strategy was effective, it had excellent dynamic and static responses, the estimated speed had good precision and the system was robust and could still work well in the very low speed range.
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