Discharge device
AssigneeDelta Electronics, Inc.
InventorChu-kuang Liu
Life of this patent
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Abstract
A device for discharging charges from a capacitor of a power system is disclosed. The discharge device includes a discharge loop electrically connected to the capacitor for providing a discharging passageway for the charges to be safely discharged therethrough, and a control loop electrically connected to the capacitor for actuating the discharge loop start to discharge at the moment when the power system is suddenly powered off.
Claims12
A discharge device arranged in a power module for discharging charges from a capacitor of said power module each time said power module is suddenly extracted from a power system which is still powered on, comprising:
- a discharge loop electrically connected to said capacitor for providing a discharging passageway for said charges to be safely discharged therethrough;
- and
- a control loop electrically connected to said capacitor for actuating said discharge loop to discharge when said module is suddenly extracted from said power system;
- said control loop being short-circuited while said power module is still connected to said power system in order to prevent said capacitor from discharging.
A discharge device arranged in a power module for discharging charges from a capacitor of said power module when said power module is suddenly extracted from a power system which is still powered on, said discharge device comprising a discharge loop electrically connected to said capacitor for providing a discharging passageway for said charges to be safely discharged therethrough, wherein said discharge loop comprises:
- a field effect transistor (FET) having a drain terminal connected to a positive pole of said capacitor;
- a first resistor having a first terminal connected to a source terminal of said FET and a second terminal connected to ground and a negative pole of said capacitor;
- and
- a bipolar transistor having a collected terminal of said FET, and an emitter terminal connected to said second terminal of said first resistor for controlling said charges to be discharged as a constant current.
Dependencies are inferred from the claim text.