BEMF

There are different mechanisms of therapeutic effect of BEMF and estrogens.

与雌激素的治疗作用存在不同机制.

By electromagnetic field finite element simulation, the influence of cogging structure and pole width on the BEMF waveform was pointed out.

通过电磁场有限元仿真，指出电机齿槽结构和磁极宽度对反电势波形的影响。

Rats of group C were exposed to BEMF, 1 h/ d.

C组暴露于BEMF治疗，1h/d，1次/d。

Firstly, the dissertation presents principles of commutation torque in the condition of ideal BEMF waveform.

本文首先分析了影响理想的方波型无刷直流电机换相转矩脉动的因素,包括:调制方式, 直流侧电压,重叠换相角等.

Aiming to minimize the torque ripple in condition of non-perfect BEMF waveform, the dissertation present a optimum current tracking control technique.

实际中一般是这两种情况都存在。针对这种反电动势波形偏离理想波形的情况，本文提出了一种最优电流跟踪法来抑制转矩脉动。