“反电动势跟踪”法消除无刷直流电机转矩脉动

在对引起无刷直流电动机(BLDCM)转矩脉动的原因进行全面分析的基础上，对其换相转矩脉动进行了重点研究，详细分析了换相期间BLDCM各物理量的动态变化过程，针对换相转矩脉动的根本成因，提出了一种全新的消除换相转矩脉动的方法，即“反电动势跟踪”法.为了通过仿真实验对这种方法进行验证，首先在Matlab/Simulink建立了BLDCM的仿真模型，创造性地解决了如何在仿真模型中生成梯形波反电动势这一BLDCM建模的难点问题.在此基础上，仿真了“反电动势跟踪”法，实验得到的电流和转矩波形充分证明了这种控制策略的合理性.

EMF tracking control strategy to eliminate torque ripple in BLDCM

Based on the analysis of reasons leading to torque ripples in BLDCM,more attentions were paid to the commutation torque ripple,and the dynamic process of BLDCM was analyzed.Aiming at the crucial reasons,an original strategy,EMF tracking method,for eliminating commutation torque ripple was put forward.To verify the scheme,a simulation model was established after generating a trapezoidal waveform of EMF,which is another original creation.On the basis,EMF tracking strategy was analyzed by simulation.It is prov...