摘要： 将新唐的Mini52(Mini51系列)单片机作为主控芯片，通过利用Mini51系列单片机自身可输出的的6路PWM信号的性能，利用采样电阻来采集端电压从而得到直流母线的电流，利用反电动势过零点法(EMF)来控制电机，实现直流无刷电机(BLDCM)无位置传感器的双闭环控制，利用串口通信来完成对无刷直流电机的伺服系统，进行了测试。测试结果表明，Mini51系列单片机可以对高速串口通信实时响应且此伺服系统具有良好的速度可控性，能够满足现代工业生产实时控制的需求。

中图分类号： TM331
文献标识码： A
DOI：10.16157/j.issn.0258-7998.211553
中文引用格式： 宋建国，袁宇瑞，桓建文. 基于Mini51的BLDCM无位置传感器控制[J].电子技术应用，2021，47(10)：95-100.
英文引用格式： Song Jianguo，Yuan Yurui，Huan Jianwen. Sensorless control of BLDCM based on Mini51[J]. Application of Electronic Technique，2021，47(10)：95-100.

Sensorless control of BLDCM based on Mini51

Abstract： Nuvoton′s Mini52(Mini51 series) microcontroller is used as the main control chip. By using the performance of the 6-channel PWM signal that the Mini51 series microcontroller can output, the sampling resistor is used to collect the terminal voltage to obtain the current of the DC bus. The zero point method(EMF) is used to control the motor to realize the dual closed-loop control of the BLDCM without position sensor. The serial communication is used to complete the servo system of the brushless DC motor, and the test is carried out. The test results show that the Mini51 series single-chip microcomputer can respond to high-speed serial communication in real time and the servo system has good speed controllability, which can meet the needs of modern industrial production real-time control.

Key words : brushless DC motor；sensorless control；Mini51；BEMF