关键词: 直流无刷电机, 矢量控制, 相电流, 控制器

Abstract: Aiming at the demand of analog sampling in brushless DC motor vector control system, a new vector control system is proposed based on the analysis of phase current sampling principle of vector control and Cortex-M0 core with single analog-to-digital converter (ADC) sampling module. The system adopts direct memory access (DMA) sampling mode for phase current and time-sharing sampling mode for control analog signal. This method simulates the dual ADC injection sampling mode, saves the sampling time, and solves the problem that the phase current needs to be handled immediately, which makes the vector control effect better. Based on STM32F030C8T6 platform, the brushless DC motor control system is designed, and the correctness of the proposed sampling method is verified.

Key words: brushlessDCmotor, vectorcontrol, phasecurrent, controller