Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1979-05-21
1981-01-13
Shoop, William M.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363101, H02M 3335
Patent
active
042452864
ABSTRACT:
A voltage regulated DC to DC converter is disclosed which is operable over a wide range of input voltage including voltages greater or less than the desired output voltage. The converter uses an inductor and a capacitor as storage elements, the inductor being composed of two windings having a common junction. A transformer having a center tap connected to the common junction of the two windings of the inductor is connected at either end of its winding to ground through controlled switches. One winding of the inductor and either end of the transformer winding are connected by respective power diodes to the capacitor which supplies the output voltage to a load. The other winding of the inductor is connected to a fourth power diode as a clamping diode. Input voltage is supplied to the inductor through a third controlled switch. A pulse width modulator connected to the output of the converter alternately closes and opens the switches connected to either end of the transformer winding and also closes the switch supplying input voltage to the inductor each time either of the switches connected to the ends of the transformer winding are closed. The duty cycle of the closing and opening of the several switches is adjusted by the pulse modulator to regulate the output voltage.
REFERENCES:
patent: 3381202 (1968-04-01), Loucks et al.
patent: 3559031 (1971-01-01), Vigna
patent: 3596172 (1971-07-01), Harrison
patent: 3913000 (1975-10-01), Cardwell, Jr.
patent: 3935526 (1976-01-01), Kamata et al.
patent: 3984799 (1976-10-01), Fletcher et al.
patent: 4063307 (1977-12-01), Stephens
patent: 4163278 (1979-07-01), Onoue et al.
Paulkovich John
Rodriguez G. Ernest
Manning John R.
Sandler Ronald F.
Shoop William M.
The United States of America as represented by the Administrator
Tresansky John O.
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