Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1998-04-28
1999-10-05
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363133, 363132, 363 17, 315307, H02M 3335, H02M 7217, H05B 3702
Patent
active
059634430
ABSTRACT:
A power terminal is connected to a DC power source. A differential amplifier has primary and secondary input terminals and an output terminal, and a device applies a reference voltage to the secondary input terminal of the differential amplifier. A phase inverter has an input terminal connected to the output terminal of the differential amplifier and has primary and secondary output terminals that output two output signals of opposite phase. A push-pull drive circuit has primary and secondary input terminals connected to the primary and secondary output terminals of the phase inverter, and has primary and secondary output terminals connected to a switching element that alternately turns on and off by being driven by the two output signals of opposite phase that are provided from the output terminals of the phase inverter. An autotransformer has a tap connected to the power terminal and taps, provided at both sides of the tap connected to the power terminal, that are connected to the primary and secondary output terminals at the push-pull drive circuit, respectively. A capacitive load may be connected at both sides of the autotransformer. A positive feedback path connects one terminal of the autotransformer to the primary input terminal of the differential amplifier, and a sinusoidal AC voltage is applied to the capacitive load.
REFERENCES:
patent: 2683241 (1954-07-01), Passmore
patent: 3749977 (1973-07-01), Silker
patent: 4021747 (1977-05-01), Todokoro
patent: 4291366 (1981-09-01), Nelson
patent: 4319164 (1982-03-01), Tulleners
patent: 5493183 (1996-02-01), Kimball
patent: 5495405 (1996-02-01), Fujimura et al.
Carlson David V.
Patel Rajnikant D.
STMicroelectronics K.K.
Tarleton E. Russel
Wong Peter S.
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