Title :
Zero-voltage-transition DC-link techniques for three-phase AC-DC-AC PWM converters
Author :
Mao, Hengchun ; Zhang, Jindong ; Lee, Fred C. ; Boroyevich, Dushan
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
New 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
Keywords :
AC-AC power convertors; AC-DC power convertors; DC-AC power convertors; PWM invertors; PWM power convertors; bipolar transistor switches; insulated gate bipolar transistors; power bipolar transistors; power semiconductor diodes; power semiconductor switches; rectifying circuits; switching circuits; AC-DC power converter; DC-AC power converter; ZVS DC-link techniques; auxiliary circuit; coordinated control; soft-switching topologies; switching losses; three-phase AC-DC-AC PWM converters; Analog-digital conversion; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Semiconductor diodes; Switches; Switching circuits; Switching converters; Switching loss; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3704-2
DOI :
10.1109/APEC.1997.575660
