A new on-line permanent magnet flux linkage identification method for PMSM is presented to reduce the negative influence caused by demagnetization or position feed-back error.

提出一种基于卡尔曼滤波器的永磁同步电机永磁体磁场状况在线监测方法。

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The model test tried on this system did not use the tachometer generator but used rotor electromotive force instead to form the speed negative feed-back system.

本绕线式电动机转子电路脉冲调速系统模拟试验，省去了测速发电机，而利用转子电势组成速度负反馈系统。

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This creates a self-sustaining negative feed back loop as prices fall, produces cut back production, creating more unemployment, reducing demand, which increase deflationary pressures.

FORBES: American Political Economy Alters English Language