Advanced High Power DC-DC Converter using Novel Type Full-Bridge Soft-Switching PWM Inverter with High Frequency Transformer Link for Arc Welding Application
Advanced High Power DC-DC Converter using Novel Type Full-Bridge Soft-Switching PWM Inverter with High Frequency Transformer Link for Arc Welding Application
复制标题
先进的大功率 DC-DC 转换器，采用新型全桥软开关 PWM 逆变器，具有高频变压器链路，适用于弧焊应用
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Hyun
中科院分区：
文献类型：
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作者：
K. Morimoto;T. Doi;M. Nakaoka;Hyun
本文提出了一种新的直流母线开关辅助全桥软开关PWM逆变器型DC-DC功率变换器的电路拓扑结构，该变换器由传统的电压源全桥高频PWM逆变器、用于PWM方案的单直流母线侧功率半导体开关器件和容性无损缓冲器组成。在新提出的高频逆变链路DC-DC大功率调理处理电路下，全桥臂和直流母线中的所有有源功率开关均可实现ZVS/ZVT关断换流操作。另一方面，虽然直流母线开关的导通功率损耗有所增加，但采用单电容无损缓冲器并联直流母线的全桥式PWM逆变器和直流母线开关的总关断开关损耗可以明显降低。因此，在开关频率大于10kHz左右的条件下，实际上可以选择使用igbt的高频逆变电源级的开关频率。随着全桥逆变器开关频率的增加，新提出的带有高频变压器链路的软开关DC-DC功率变换器在功率转换效率和功率密度方面都比传统硬开关逆变器型DCDC有显著的优势
This paper presents a new circuit topology of DC busline switch-assisted full-bridge soft-switching PWM inverter type DC-DC power converter which is composed of conventional voltage source full-bridge type high frequency PWM inverter in addition to a single DC busline side power semiconductor switching device for PWM scheme and a capacitive lossless snubber. Under the newly-proposed high frequency inverter link DC-DC high power conditioning and processing circuit, all active power switches in the full-bridge arms and DC busline can achieve ZVS/ZVT turn-off commutation operation. On the other hand, although the conduction power loss of DC busline switch increases a little, the total turn-off switching losses of full-bridge type PWM inverter and DC busline switch with the single lossless capacitive snubber parallel with DC busline can be significantly decreased. As a result, the switching frequency of high frequency inverter power stage using IGBTs can be actually selected under a condition of switching frequency more than about 10kHz. The more the switching frequency of full-bridge inverter increases, the more newly-proposed soft-switching DC-DC power converter with a high frequency transformer link has remarkable advantage as for the power conversion efficiency and power density as compared with the conventional hard-switching inverter type DCDC
power converter. The effectiveness of this new converter topology is proved for low voltage and large current DC power supplies from a practical point of views.