摘  要：内置霍尔传感器的无刷直流电机因其体积偏大，易坏的传感器不易修理等缺点而出现越来越多的局限性。本文通过检测关断相反电动势的过零点来获得永磁转子的关键位置信号，从而可以控制绕组电流的切换，实现电动机的正常运转。本文采用反电动势过零法，以STM32F103为核心构建了一套装置，实现了无刷直流电机的无传感器控制。

关键词：无刷直流电机；无传感器；反电动势过零法；STM32F103

Abstract: The brushless DC motor with built in Holzer sensor is large in volume, the sensor is easy bad and is very difficult to repair, so there are more and more limitations. In this paper, the critical position signal of the permanent magnet rotor is ob