The PMSM servo system needs the high-precision and real-time position feedback to support its closed-loop vector control. Usually, the encoder transfers the position of motor rotor to the controller when working, but it always brings the problem of signal disturbed and lagged. A method of embedded position detection was proposed in this paper, and a PMSM servo system integrated with motor, hall and controller was designed. To the voltage signal of hall which was collected by the main processor of system, the novel signalprocessing of looking-up table was achieved, and the high-accuracy position was gotten successfully. It brings the elements of the vector control for PMSM. The experimental result shows that the current-loop and velocity-loop of integrated PMSM servo system are of high performance and good control accuracy.%永磁同步电机需要精确度高,实时性好的位置反馈来支持它的闭环矢量控制.该文针对编码器与控制器位置通讯时容易造成信号干扰、滞后等问题,提出一种内置式位置检测方法,并设计了一套电机、霍尔磁环组合和控制器一体的永磁同步电机系统.对于霍尔磁环组合发生的电压信号,采用新型的基于标定查表信号处理方式,实现了高分辨率、高精度的转子绝对位置检测.提出"吸d轴"方法,成功实现了转子的初始位置确认,为系统的同步矢量控制提供了保证.实验结果表明,一体型永磁同步电机系统的电流环、速度环运行质量和控制精度高,具有良好的动静态性能.
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