The error for shutdown time deduced from the energy consumption is less than 6%. When the rising time is fixed, the shutdown time is unchanged. Experimental results show that adjustment of the current rising time can precisely control the value of the clamp voltage. Since the switch is not ideal, we propose a new method to test the shutdown time by the low voltage, the high voltage and the peak current. From the viewpoint of the circuit energy loss, by taking the high-voltage capacitor bypass resistance and the capacitor of the passive snubber circuit into account, we establish the relationship between the rising time and the shutdown time. We use the rising time to control shutdown time and use low voltage power source to control peak current. Based on clamping voltage technique, we introduce a new controlling method with constant shutdown time. In the past, it was difficult to use the constant clamping voltage technique to realize the synchronized shutdown of currents with different peak values. The key is the bipolar current waves shutdown, concurrently in the inductive load. Cooperative work of multiple magnetic transmitting sources is a new trend in the development of transient electromagnetic system.
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