Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1989-12-07
1991-07-30
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 71, 323299, H02M 324, H02M 744
Patent
active
050364499
ABSTRACT:
A power supply for converting a variable DC input potential (12) to a regulated DC output potential in accordance with the invention includes a plurality of DC to DC converters (300), each converter operating in response to a DC input potential having an operating range, having an input for receiving a DC input potential which is variable in magnitude, and an output for producing the DC output potential, the outputs of the converters being coupled together; a variable voltage divider (18) having an input coupled to the variable input potential, a plurality of connected stages (100) coupled to the input potential, at least one control signal applied to the variable voltage divider for controlling a number of stages across which the variable input potential is dropped; a switching circuit (200), coupled between the variable voltage divider and the plurality of DC to DC converters, responsive to at least one switching control signal, for coupling an output potential developed by at least one of the stages to at least one of the converters as a DC input potential so that each converter to which an output potential from one of the stages is coupled has an input potential within an operating range of the converter; and a controller (500), responsive to the variable input potential, for generating the at least one control signal and the at least one switching signal as a function of the DC input potential.
REFERENCES:
patent: 3234450 (1966-02-01), Jennings
patent: 3790877 (1974-02-01), Bailey
patent: 4062057 (1977-12-01), Perkins et al.
patent: 4587604 (1986-05-01), Nerone
Dhyanchand John J.
Nguyen Vietson M.
Beha Jr. William H.
Sundstrand Corporation
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