| 摘要 |
A DC voltage bus clamp includes a transistor, a resistor, and a diode. The transistor is placed in parallel with a load. The resistor is connected across a bridge rectifier. A gate or base of the transistor is connected to the resistor. The anode of the diode is connected to ground and the cathode is connected to the gate or base of the transistor. A hysteresis circuit may be added to form a second embodiment of the DC voltage bus clamp to trigger the transistor suddenly. A third embodiment of the DC voltage bus clamp includes a resistor sensing circuit. The diode of the first embodiment is replaced with a sense resistor. The resistor sensing circuit is connected between the sense resistor and the transistor.
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