TY - GEN
T1 - 32V-300A/60kHz edge resonant soft-switching PWM DC/DC converter with DC rail series switch-parallel capacitor snubber assisted by high-frequency transformer parasitic components
AU - Etoh, Tetsuya
AU - Ahmed, Tarek
AU - Hiraki, Eiji
AU - Morimoto, Keiki
AU - Fathy, Khairy
AU - Ahmed, Nabil A.
AU - Lee, Hyun Woo
AU - Nakaoka, Mutsuo
PY - 2005/12/1
Y1 - 2005/12/1
N2 - The conduction losses of the active switches can be lowered, which are connected to the primary side of extremely step-down high frequency transformer because of low voltage large current rectifier configuration. This paper presents two new circuit topologies of DC busline side active edge resonant snubber assisted soft-switching PWM full-bridge DC-DC converter acceptable for either utility AC 200V-rms or AC 400V-rms input voltage source. One topology of proposed DC-DC converters is composed of a typical voltage source-fed full-bridge high frequency PWM inverter using DC busline side series power semiconductor switching devices with the aid of a parallel capacitive lossless snubber. All the active power switches in the full-bridge arms and DC busline can achieve ZCS turn-on and ZVS turn-off commutations and the total turn-off switching power losses of all active switches can be reduced for high-frequency switching action. It is proved that the more the switching frequency of full-bridge soft switching inverter increases, the more soft-switching PWM DC-DC converter with a high frequency transformer link has remarkable advantages for its efficiency and power density as compared with the conventional hard-switching PWM inverter type DC-DC converter. In this paper, another modified version topology of utility AC 200V-rms grid-connected soft switching DC-DC converter mentioned above is also implemented and evaluated, which is more suitable for utility 400V-rms grid power source. The effectiveness of these new DC-DC converters topologies is proved for low voltage and large current high efficiency DC-DC power supplies as TIG arc welding machine from a practical point of view.
AB - The conduction losses of the active switches can be lowered, which are connected to the primary side of extremely step-down high frequency transformer because of low voltage large current rectifier configuration. This paper presents two new circuit topologies of DC busline side active edge resonant snubber assisted soft-switching PWM full-bridge DC-DC converter acceptable for either utility AC 200V-rms or AC 400V-rms input voltage source. One topology of proposed DC-DC converters is composed of a typical voltage source-fed full-bridge high frequency PWM inverter using DC busline side series power semiconductor switching devices with the aid of a parallel capacitive lossless snubber. All the active power switches in the full-bridge arms and DC busline can achieve ZCS turn-on and ZVS turn-off commutations and the total turn-off switching power losses of all active switches can be reduced for high-frequency switching action. It is proved that the more the switching frequency of full-bridge soft switching inverter increases, the more soft-switching PWM DC-DC converter with a high frequency transformer link has remarkable advantages for its efficiency and power density as compared with the conventional hard-switching PWM inverter type DC-DC converter. In this paper, another modified version topology of utility AC 200V-rms grid-connected soft switching DC-DC converter mentioned above is also implemented and evaluated, which is more suitable for utility 400V-rms grid power source. The effectiveness of these new DC-DC converters topologies is proved for low voltage and large current high efficiency DC-DC power supplies as TIG arc welding machine from a practical point of view.
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U2 - 10.1109/IECON.2005.1569069
DO - 10.1109/IECON.2005.1569069
M3 - Conference contribution
AN - SCOPUS:33749664966
SN - 0780392523
SN - 9780780392526
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 1159
EP - 1165
BT - IECON 2005
T2 - IECON 2005: 31st Annual Conference of IEEE Industrial Electronics Society
Y2 - 6 November 2005 through 10 November 2005
ER -