For the BLDCM which has a sinusoidal back EMF, this paper presents a self-synchronous SVPWM control method using six discrete position signals for minimizing torque ripple.

本文对于反电动势波形接近正弦的永磁无刷直流电动机，提出一种基于六个离散位置信号的自同步svpwm控制方法，用于抑制电磁转矩脉动。

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The open torque is little and the valve can self compensate after wearing because of big chocking force. The seal performance is good and stable.

开启力矩小，楔紧力大。磨损后，能自行补偿，密封性好，性能稳定。

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For AC servo system of permanent magnet synchronous motor (PMSM), the position servo controller was constructed with direct torque control and self-adjusting PI control based on Fuzzy inferences.

在永磁同步电机交流伺服系统中，采用直接转矩控制及模糊自适应PI控制构成位置伺服控制器。

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With the help of a machinist, and using a formula he concocted for a stiff, self-lubricating plastic, Fenelon built a crude prototype of the gear and found that the torque required to push the window was half of what the old design required.

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