In order to have a reliable operation, must reduce the speed fluctuation, namely must effectively restrain the load torque ripple and motor electromagnetic torque ripple of speed fluctuation bring.
为了可靠运行，必须降低转速的波动，即必须有效抑制负载转矩脉动和电机电磁转矩脉动带来的转速波动。
This paper mainly focuses on the fluctuation of velocity and torque of the electromotor because of the variational load in the pumping unit equipment.
摘要抽油机中载荷变化大，易引起电动机转速和转矩的波动。
The load rate, load fluctuation rate and actual distribution of the torque moments of partial spindle of the mill have been analyzed.
分析了三辊劳特式轧机的负荷率、负荷波动率水平及分轴扭矩的分配实况。
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