永磁无刷直流电机及其控制

为提高电机系统测试效率及降低测试成本和风险，提出了回馈制动运行状态无刷直流电机（brushless DC motor，BLDCM）功率级实时仿真方法.该方法以功率级电流源模拟真实BLDCM绕组，可与电机驱动器交互电功率.采用双线性变换和逆Z变换方法推导了基于线电压的虚拟BLDCM数值模型，分析了功率级虚拟BLDCM回馈制动过程的电流路径以及电压和电流关系，给出了回馈制动运行时数值模型所需虚拟绕组线电压的获取方法.构建了功率级虚拟BLDCM实验平台，并进行了回馈制动实时仿真.应用MATLAB软件进行了BLDCM回馈制动的离线仿真以验证实验结果的准确性.结果表明，该方法无须改变驱动器硬件结构，可准确模拟BLDCM的稳态和瞬态过程，有效实现BLDCM回馈制动功率级实时仿真.

Permanent-magnet brushless DC motor and its control

To improve the test efficiency and reduce the test cost and risk for the motor system, the power-level real-time simulation method of brushless DC motor (BLDCM) in regenerative braking process was presented in this paper. The winding of the real BLDCM was simulated by the power-level current source of the virtual BLDCM. Then, the electric power can be interacted between the virtual BLDCM and motor driver. The bilinear transformation and inverse Z-transform method were used to derive the numerical model based on line voltage. The current path and the relationship between the voltage and current of the virtual BLDCM with regenerative braking were analyzed. The acquiring method of the virtual winding voltage in the regenerative braking process was presented to calculate the BLDCM numerical model. Based on the power-level virtual BLDCM experimental platform, the real-time simulation with regenerative braking was performed. Furthermore, the offline simulation of BLDCM with regenerative braking was performed by using MATLAB software to verify the experimental results. Results show that both transient and steady state of the BLDCM can be simulated accurately without changing any hardware of the motor driver, and the real-time simulation of power-level virtual BLDCM in the regenerative braking process can be realized effectively.