A true-rms collection and calculation methods based on Fourier transform was pressnted, was hardware and software design solutions of the motor and control system was given, the program has a simple wiring, high voltage and low voltage system was completely isolated, high reliability, and the results showed the high accuracy of the data acquisition system, real time of the protection if high.%提出了一种基于傅里叶变换的真有效值采集和计算方法,给出了电机测控系统的软硬件设计方案. 该方案具有接线简单、一二次系统完全隔离、系统可靠性高等特点. 最后通过试验,验证显示了该系统数据采集精度高、保护实时性强.
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