Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1979-08-02
1981-05-26
Miller, J. D.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363132, H02M 7537
Patent
active
042701635
ABSTRACT:
A converter includes a full-wave bridge network across which operating voltages of +E and -E volts are applied, diagonal legs of the bridge each including two semi-conductor switches connected in series between individual operating voltage and output terminals, two diodes polarized in one direction being connected for conducting current from a point of reference potential to the centralmost switches of the two upper legs, respectively, and another two diodes like polarized in another direction being connected for conducting current from the centralmost switches of the two lower legs, respectively, to the point of reference potential. Each diode and its associated switch form a unidirectional gated current path and the vertically opposing centralmost switch and diode pairs of the upper and lower legs form a bidirectional gated current path. The switches are operable for providing zero, +E, +2E, -E, and -2E volts across a load in some predetermined sequence for producing a desired AC voltage waveform across the load. The diodes also serve to clamp the common connections between their associated two semiconductor switches to within a diode drop of the reference potential, thereby protecting the switches from overvoltage.
REFERENCES:
patent: 3105944 (1963-10-01), Lostetter
patent: 3141110 (1964-07-01), Corry
patent: 3227889 (1966-01-01), Paynter
patent: 3299370 (1967-01-01), Massey
patent: 3325719 (1967-06-01), Gillet
patent: 3510749 (1970-05-01), Resch
patent: 3581212 (1971-05-01), McMurray
patent: 3867643 (1975-02-01), Baker et al.
Exxon Research & Engineering Company
Miller J. D.
Watov Kenneth
Wong Peter S.
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