微型电动车用永磁无刷电机转矩脉动控制研究

针对微型电动车用永磁无刷电动机转矩脉动大、低速运行时噪声明显等主要问题，采用模糊控制和滑模控制相结合的方法，克服了未建模参数的影响，保证了滑模到达阶段的鲁棒性，同时抑制了转矩脉动．采用单周期内各功率管均衡调制的方式，不仅消除了反向电流，而且与其他调制方式相比，可使转矩脉动较小．针对永磁无刷电机在换相过程中，非导通相对转矩脉动的影响，提出了以瞬间提高开通相电流上升斜率的方式，来减小由非导通相造成的转矩脉动，使其电流恒定，低速运行转矩脉动降低了30％，有效地降低了微型电动车的起动噪声，不仅骑行舒适，而且具有较强的实用价值．

Research on Torque Ripple Control of Brushless DC Motor for Mini-Battery Electric Vehicle

Aiming at permanent brushless DC motor in mini-BEV(battery electric vehicle)with torque ripple and violent noise during low speed running,the fuzzy control method is combined with slide mode control method to suppress the influence due to un-modeling parameters,and to ensure the robustness in the process of reaching slide mode plane.Compared with existing modu- lating method,torque ripple is greatly reduced by uniform modulating in one monocycle,increas- ing current slope of upcoming conducting phase instantaneously suppresses the torque ripple by 30% during low speed with obviously lower initiating noise.This method has the merits of easy in realization and being able to obtain good effect.