Light and electric signal brakes by PLC control power and magnetic clutch to keep pace with the main engine.
光电信号通过PLC控制电磁离合制动，实现与主机同步。
An airway in the center bit of the electric engine axis is used for taking away the heat which the magnetic coil and rolling eddy current loss produce.
在电机轴中心钻有一个通风孔，利用电机风扇的风通过通风孔形成一气流回路带走磁线圈和转子涡流损耗产生的热量。
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