Pulse width modulated power supplies

Details Pulse width modulated power supplies Pulse width modulated power supplies

1974-12-09

1976-05-25

Shoop, William M.

H02M 108

Patent

active

039597113

ABSTRACT:
A pulse width modulated power supply contains an inverter circuit which includes a plurality of transistors connected to a drive transformer. The transistors are caused to conduct alternatively to provide a switching waveform at an output, which waveform is filtered to provide a regulated DC output voltage.
The supply includes means for preventing switch-through of the transistors while providing regulation of the output voltage to keep the same constant over a wide range of operating conditions.
Other means provide an efficient drive for the inverter as well as the capability of operating the supply at either of two input voltage levels.

REFERENCES:
patent: 3361952 (1968-01-01), Bishop
patent: 3423665 (1969-01-01), Greenberg et al.
patent: 3435324 (1969-03-01), Bishop
patent: 3670234 (1972-06-01), Joyce
patent: 3859586 (1975-01-01), Wadlington

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