Precharging load capacitor for power-factor-corrected...

Details Precharging load capacitor for power-factor-corrected... Precharging load capacitor for power-factor-corrected...

2006-04-04

2006-04-04

Sterrett, Jeffrey (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S065000, C323S222000, C323S272000

Reexamination Certificate

active

07023716

ABSTRACT:
A power supply for a capacitive-resistive load includes plural paralleled phase correcting modules together with current sharing controllers for tending to equalize their currents. Each module is provided with a diode, poled to prevent forward current from flowing in the return current path, for aiding in equalizing module currents. Surge currents are reduced by a single saturable reactor coupled to the combined outputs of current sharing controllers, thereby avoiding the need for soft-start in each controller. A precharging path extends from a source of pulsating direct voltage to the load, for precharging the load capacitance at turn-on.

REFERENCES:
patent: 4384321 (1983-05-01), Rippel
patent: 5001620 (1991-03-01), Smith
patent: 6091233 (2000-07-01), Hwang et al.
patent: 6903946 (2005-06-01), Wu

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