关键词: 无刷直流电机, STM32, 矢量控制, 过流保护

Abstract: Aiming at solving the problems of low efficiency, high noise and torque ripple of brushless DC motor (BLDCM) driven by traditional square wave control method, a BLDCM control system based on vector control strategy was developed. Hardware circuits like inverter driving, bus current sampling, overcurrent protection were designed at the core of STM32F103C6T6 microcontroller, and electronic angle compensation was used in control software. The test results indicate that compared to traditional square wave control method, the system can decrease the fluctuation of the commutation current substantially, and reduce the running noise torque ripple simultaneously. It is quite suitable for electrical equipment sensitive to running noise, such as electric bike, air conditioner, etc. Through a long period of testing and verifying, the system has high stability, and is able to work safely and reliably for a long time, meanwhile, it has low cost and is easy to achieve, so it has high application value.

Key words: brushless DC motor, STM32, vector control, overcurrentprotection