盘式永磁电机定子固有频率的研究 关键词： 直流电动机；箝位；同步电动机；箝位电动机 [gap=1069]Key words： DC motor； clamp； synchronous motor； clamped motor
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直流电动机中的电刷能够指示直流励磁磁极的位置，又可以控制电枢电流的相位，直流电动机应是箝位电动机。
In DC motor, the locality of axis of armature MMF was determined by the brush position, here the brush possessed a function of clamping.
直流电动机中电枢磁动势的轴线位置是由电刷位置决定的，电刷具有箝位的功能。
In DC motor, the locality of axis of armature MMF was determined by the brush position, here the brush possessed a function of clamping.
针对直流电动机中电枢磁动势的轴线位置由电刷决定的特征，提出了箝位概念，指出自控变频乃是箝位效应的直接后果。
Aimed at the feature that the locality of axis of the armature MMF is determined by the brush in dc motor, a new concept on clamp is proposed.
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