{Zero-voltage-transition DC-link techniques for three-phase AC-DC-AC PWM converters}

Title{Zero-voltage-transition DC-link techniques for three-phase AC-DC-AC PWM converters}
Publication TypeConference Paper
Year of Publication1997
AuthorsMao H, Zhang J, Lee FC, Boroyevich D
Conference NameApplied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual
ISBN NumberVO - 2
KeywordsAC-AC power convertors, AC-DC power converter, AC-DC power convertors, Analog-digital conversion, auxiliary circuit, bipolar transistor switches, coordinated control, DC-AC power converter, DC-AC power convertors, Insulated gate bipolar transistors, power bipolar transistors, power semiconductor diodes, power semiconductor switches, Pulse width modulation converters, Pulse width modulation inverters, PWM invertors, PWM power convertors, Rectifiers, rectifying circuits, Semiconductor diodes, soft-switching topologies, Switches, switching circuits, Switching converters, Switching loss, switching losses, three-phase AC-DC-AC PWM converters, Zero voltage switching, ZVS DC-link techniques
AbstractNew soft-switching topologies are proposed for AC-DC-AC power converters by applying a soft-switching mechanism to the common DC link, and using a single auxiliary circuit, which provides the soft-switching function to all of the twelve main switches. The switches in the AC-DC power converter and the DC link switch are turned on with zero voltage, while the switches in the DC-AC power converter are turned off with zero-voltage, resulting in much reduced switching losses. With coordinated control of the AC-DC and the DC-AC power converters, the soft-switching circuit is actuated only once in every switching cycle, and has much less power loss than in existing schemes