Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1994-09-09
1996-11-12
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 40, 363138, H02M 75387
Patent
active
055746365
ABSTRACT:
An improved zero voltage transition (ZVT) pulse width modulation (PWM) link converter is provided which introduces a space vector modulation scheme and an auxiliary circuit which includes a commutation power supply or special switch arrangement used to discharge resonant inductor currents to zero and to recover commutation energy. In an alternate embodiment, an improved ZVT PWM link converter provides an auxiliary switch for each main switch in the converter to achieve ZVT. The novel ZVT converters provide zero-voltage switching without increasing switching action of the main switches. In this way, the advantages of PWM control is maintained. Conduction loss, turn-off losses, and voltage stress of the main switches are the same as in conventional PWM converters, but the dominant turn-on losses are eliminated, so total power losses are minimized.
REFERENCES:
patent: 4730242 (1988-03-01), Divan
patent: 4964483 (1989-09-01), Divan
patent: 5111374 (1992-05-01), Lai et al.
patent: 5172309 (1992-12-01), DeDoncker et al.
patent: 5412557 (1995-05-01), Lauw
Lee Fred C.
Mao Hengchun
Berhane Adolf
Center For Innovative Technology
Virginia Polytechnic Institute and State University
Virginia Tech Intellectual Properties Inc.
Wong Peter S.
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