Power supply for low-voltage load

Details Power supply for low-voltage load Power supply for low-voltage load

1981-12-11

1983-12-20

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 56, 363 97, 323222, 323282, H02M 3335

Patent

active

044221380

ABSTRACT:
A power supply operating at high frequencies for energizing a low-voltage lamp and the like loads, utilizes an autotransformer in series with a switching device. The series combination receives a voltage, greater than the voltage required for load operation, from commercial power mains. The load is tapped down upon the autotransformer, with the load current magnitude being controlled by variation of the percentage of time during which the switching device is in the conductive condition, during a power supply cycle interval; the conductive time is adjusted responsive to the current sensed to be flowing through the transformer and hence through the load.

REFERENCES:
patent: 3160808 (1964-12-01), Kruse, Jr.
patent: 3753075 (1973-08-01), Tomura et al.
patent: 3959716 (1976-05-01), Gilbert, Jr. et al.
patent: 4037271 (1977-07-01), Keller
patent: 4163278 (1979-07-01), Onoue et al.
patent: 4168477 (1979-09-01), Burchall

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