极数二字源于古代哲学专著《系辞》一书“极数知来之谓占”。
... 特性(Characteristic): 极数(Number of poles): 电流种类(AC或DC) (Kind of current:: AC or DC): ...
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极数（Poles）:6～40适用电线范围（Useablewirerange）:厚度0.3mm柔性扁平线缆适用印制板厚度（ApplicablePCboardthickness）:0.8mm额定电压（...
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供应防爆镇流器箱，荧光灯电子镇流器，金卤灯电感镇流器厂家 ... 出线口螺纹（G")Outlet’s thread 极数No.of pole 防护等级Protection grade ...
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通过分析开关磁阻电机的运行原理，确定了极数的选择。
Pole number is determined through analyzing the operation principles of switch reluctance motor.
磁阻电动机以某一速率同步动转，该速率是由电源频率和定子绕制的极数决定的。
The reluctance motor operates synchronously at a speed which is determined by the supply frequency and the number of poles for which the stator is wound.
从中可以看出绕组极数选取方案决定悬浮力绕组的电能传递方向及它的励磁方式。
From the relations, it is concluded that pole-number selection of windings not only determines direction of electrical energy transfer for levitation force winding, but also does its excitation modes.
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