Digitally controlled power supply

Details Digitally controlled power supply Digitally controlled power supply

1983-08-03

1984-08-21

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323272, 363124, G05F 100

Patent

active

044672683

ABSTRACT:
A high power factor AC to DC power supply having a high frequency pulse producing circuit comprising an inductor supplied with rectified raw AC power through a semiconductor switch which provides dynamic power factor correction by maintaining the width of the on-times of the switch substantially constant throughout each cycle of the input AC power. The peak energy stored in the inductor during the on-times are a function of the amplitude of the instantaneous voltage of said rectified AC power, so that each time the switch is turned off, the output pulse of current supplied to the load by the inductor has a time duration which is a direct function of the instantaneous voltage value of the rectified AC power. The output load has a filter whose time constant is greater than a cycle of said rectified AC power, and the average on-time of said switch is varied over a number of cycles of said AC power to regulate the output voltage of said supply.

REFERENCES:
patent: 3571697 (1971-03-01), Phillips
patent: 3913002 (1975-10-01), Steigerwald et al.
patent: 4017745 (1977-04-01), McMahon
patent: 4074344 (1978-02-01), Pitel
patent: 4238710 (1980-12-01), Nelson

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