Zero-voltage-transition (ZVT) 3-phase PWM voltage link converters

Publication Date
1996-11-12Filing Date
1994-09-09Inventor
Lee, Fred C.
Mao, Hengchun
Metadata
Show full item recordAbstract
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.
Assignee
Center for Innovative Technology
Virginia Polytechnic Institute and State University
Virginia Tech Intellectual Properties, Inc.
Patent Number
5574636
Application Number
8304661
Primary/U.S. Class
363/132
Other/U.S. Class
363/40
363/138
CPC Class
H02M5/4585
H02M7/4826
Y02B70/145
Patent Type
utility
Collections
- Virginia Tech Patents [687]