Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1982-06-14
1986-10-14
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 49, 123494, H02M 3338
Patent
active
046176209
ABSTRACT:
A power supply for an acoustic fuel injector (18) comprises a DC to DC converter (14) for supplying a regulated voltage to a frequency-controlled oscillator (16) which drives the injector valve or valves. The converter (14) comprises a flyback oscillator (28) including a switching transistor (32) and a transformer (34, 36) for applying rectified current pulses of variable amplitude and occurrence rate to an output capacitor (42). A variable impedance transistor (50) in the input circuit to the flyback oscillator (28) is controlled by a feedback signal (68) from the output circuit (30) to vary the cycle rate of the flyback oscillator (28) to maintain output voltage at a desired value. Start up of oscillations in flyback oscillator (28) is assisted by a resistive feedback connection (56) and oscillations are maintained by a tertiary transformer winding (38).
REFERENCES:
patent: 3114096 (1963-12-01), Projain
patent: 3890612 (1975-06-01), Sweany
patent: 4084219 (1978-04-01), Furukawa et al.
patent: 4156157 (1979-05-01), Mabille
patent: 4469974 (1984-09-01), Speranza
patent: 4537353 (1985-08-01), Speranza
Beha Jr. William H.
Eaton Corporation
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