In order to decrease the torque ripple and improve the operational efficiency of brushless direct current motor (BLDCM) drive system, a vector control scheme of BLDCM based on the minimum copper loss was proposed. In the realization approach for the proposed scheme, the current command generator was designed based on the minimum copper loss, and the generator would obtain the given values of BLDCM stator current according to the reference torque output by speed outer loop. After comparing the given values with the actual values of stator current, the comparison values passed through the PI adjuster of inner current loop and the reference voltage of inverter would be generated. Through controlling the inverter, the space vector pulse width modulation (SVPWM) was performed, and the phase voltage of driving BLDCM was output to implement the vector control of BLDCM. In order to verify the feasibility and effectiveness of the vector control scheme of BLDCM based on the minimum copper loss, the Simulink simulation model for the proposed system was established. The simulated results validate that the vector control scheme of BLDCM can not only reduce the torque ripple but also exhibit good dynamic and static performances.%为了降低无刷直流电机(BLDCM)驱动系统的转矩脉动,提高运行效率,提出了基于最小铜损的BLDCM矢量控制方案.该方案实现思路是基于最小铜损设计电流指令发生器,发生器根据速度外环输出的参考转矩获得BLDCM定子电流给定值.定子电流给定值与实际定子电流比较后,经过电流内环PI调节器生成逆变器参考电压,其控制逆变器进行空间矢量脉宽调制(SVPWM)并输出驱动BLDCM的相电压,实现BLDCM的矢量控制.为了验证基于最小铜损BLDCM矢量控制方案的可行性和有效性,建立了该系统的Simulink仿真模型,仿真结果证实了BLDCM矢量控制在降低转矩脉动的同时兼具良好的动态和静态性能.
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