点火线圈初级绕组。电流通过线圈，产生一个电磁场，用来在次级线圈中产生高电压。
Ignition coil primary winding. Current flow through the coil produces an electromagnetic field, which is used to induce a high voltage in the secondary coil.
给出测试电感拟合的表达式，推导了绕组的磁链方程、旋转电压方程、电磁转矩方程和状态方程。
The fitting expression of the tested inductance, winding flux linkage equation, rotating voltage equation, electromagnetic torque equation and their state equations are also presented.
电能供给电动机绕组和磁场，产生电磁感应作用，试电动机产生机械能或者转矩。
Motors have electrical energy supplied to their windings and a magnetic field that develops an electromagnetic interaction to produce mechanical energy or torque.
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