TY - GEN
T1 - Dual utility AC voltage line operated soft switching PWM DC-DC power converter with high frequency transformer link for arc welding equipment
AU - Morimoto, Keiki
AU - Do, Toshimitsu
AU - Manabe, Haruhiko
AU - Ahmed, Nabil A.
AU - Lee, Hyun Woo
AU - Nakaoka, Mutsuo
AU - Ahmed, Tarek
AU - Hiraki, Eiji
PY - 2005/12/1
Y1 - 2005/12/1
N2 - This paper presents two new circuit topologies of dc busline series active snubber assisted soft switching PWM full-bridge dc-dc power converter acceptable for either utility ac 200V-rms or ac 400V-rms Input voltage source. Proposed power converters are composed of a typical voltage source full-bridge high frequency PWM Inverter using dc busline side series 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 commutation operation and consequently the total turn-off switching losses can be significantly reduced. As a result, a high switching frequency for used IGBTs can be actually realized more than about 20 kHz. It Is proved that the more the switching frequency of full-bridge Inverter Increases, the more soft switching PWM dc-dc power converter with a high frequency transformer link has remarkable advantages for Its power conversion efficiency and power density as compared with the conventional hard switching PWM Inverter type dc-dc converter. The effectiveness of this new converter topology Is proved for low voltage and large current dc-dc power supplies as arc welding machine from a practical point of view.
AB - This paper presents two new circuit topologies of dc busline series active snubber assisted soft switching PWM full-bridge dc-dc power converter acceptable for either utility ac 200V-rms or ac 400V-rms Input voltage source. Proposed power converters are composed of a typical voltage source full-bridge high frequency PWM Inverter using dc busline side series 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 commutation operation and consequently the total turn-off switching losses can be significantly reduced. As a result, a high switching frequency for used IGBTs can be actually realized more than about 20 kHz. It Is proved that the more the switching frequency of full-bridge Inverter Increases, the more soft switching PWM dc-dc power converter with a high frequency transformer link has remarkable advantages for Its power conversion efficiency and power density as compared with the conventional hard switching PWM Inverter type dc-dc converter. The effectiveness of this new converter topology Is proved for low voltage and large current dc-dc power supplies as arc welding machine from a practical point of view.
KW - Active switch assisted lossless capacitive snubber
KW - Arc welding power supply in industry
KW - Dc-dc power converter
KW - High frequency transformer links
KW - Soft switching PWM
KW - Voltage source full-bridge topology
UR - http://www.scopus.com/inward/record.url?scp=33846953242&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846953242&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33846953242
SN - 7506274078
SN - 9787506274074
T3 - ICEMS 2005: Proceedings of the Eighth International Conference on Electrical Machines and Systems
SP - 1084
EP - 1089
BT - ICEMS 2005
T2 - ICEMS 2005: 8th International Conference on Electrical Machines and Systems
Y2 - 27 September 2005 through 29 September 2005
ER -