根据跟踪误差改变控制器参数以精确地跟踪设定电流；

Variable structure control strategy correspond to tracking error was implemented to reach ideal current with high precision.

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偏压电路依据参考电压来偏压第一级电路与电流补偿电路，并设定电流补偿电路的偏压。

Bias circuit according to the reference voltage to bias the first stage circuit and the current compensation circuit, and set the bias current compensation circuit.

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可以设定电流，自动检测集电环两个电极在一定电流下的电压降，并且还可以检测集电环与轴之间的绝缘电阻及漏电流。

It can be used to set current, automatically detect the voltage drop of the two slip ring electrodes in a certain current, and the insulation resistance and leakage between the slip ring and the axis.

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