Since HSY requires dc magnetic field, an exciter with control circuitry is needed in addition to the conventional PMSY drive unit when employed as a motor.
HSY作为电动机使用时，由于需要直流磁场，与普通pmsy的驱动单元相比，应额外增加一个励磁电路。
2
Electric current in the cable winding generates a traveling magnetic field which pulls the vehicle along without contact. The support magnets form the exciter (i. e. the motor).
通电螺线管里的电流产生里一个移动磁场，以非接触的方式驱动车辆。
3
The control equipment includes centralized control device for set, AC field system of exciter, device for assisting magnetism (DAM), speed sensor of generator, and braking controller for blower fan.