For the shortcomings of the exiting brushless DC motor control system, the sensorless brushless DC motor control system based on STM32F103 processor is proposed. The circuit of the control system is designed, and through software programming the rapid detection of the rotor position and motor speed regulation are realized. The experimental results show that the system has low cost, reliable operation and good speed control.%针对现有无刷直流电机控制系统的缺点，提出了基于STM32F103处理器的无位置传感器无刷直流电动机控制系统。设计并实现了该控制系统的硬件电路，并通过软件编程实现了对转子位置的快速检测及电机调速。实验结果表明了该系统的设计成本较低，运行平稳，调速性能良好。
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