The electronic control unit allows current to flow through the ignition coil primary winding until it senses a triggering voltage pulse from the speed sensor, or pickup coil.

电子控制单元使电流通过初级绕组直到感知到一个从转速传感器或拾波线圈产生的触发电压脉冲。

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Flywheel control system has two closed loops, the inner is voltage stabilization loop, other is current loop or is speed loop in different mode.

飞轮控制系统是个多回路系统，内回路为电压稳定回路，外回路在不同的工作模式下分别为电流回路和转速回路。

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Voltage or current control.

电压或当前的控制。

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But the central point about both taps and transistors is that they allow a small signal the twist of a hand or the increase of a voltage to control a much larger one the rush of water or of electrical current.

ECONOMIST: The middle age of the transistor