Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1997-12-03
1999-02-23
Wong, Peter S.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363142, 323299, 307130, H02M 700
Patent
active
058751050
ABSTRACT:
An improved power supply apparatus for controlling electrical elements of a vehicle which is used for a vehicle using 12 volts as well as a vehicle using 24 volts. The apparatus includes a mode selection switching unit which is selectively switched in accordance with a voltage level inputted from a battery, a first voltage transformation unit, which is not operable when the mode selection switching unit is in the turned-on mode and is operable when the mode selection switching is in the turned-of mode, for dropping an input voltage from the battery to a predetermined level, and a second voltage transformation unit for dropping a voltage from the battery when the mode selection switching unit is in the turned-on mode and dropping an output voltage from the first voltage transformation unit to a predetermined level when the mode selection switching unit in the turned-off mode.
REFERENCES:
patent: 4415964 (1983-11-01), Scharfe, Jr.
patent: 5006782 (1991-04-01), Pelly
patent: 5404092 (1995-04-01), Gegner
patent: 5406834 (1995-04-01), Taniguchi
Han Y. J.
Mando Machinery Corporation
Wong Peter S.
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