发明名称 |
Circulating current free type high frequency soft switching pulsewidth modulated full bridge DC/DC converter |
摘要 |
An improved soft switching topology of a full bridge PWM DC/DC converter is described. The new topology employs an energy recovery snubber to minimize a circulating current flowing through the transformer and switching devices. By using an energy recovery snubber instead of adding a tapped inductor and a saturable reactor to reduce RMS current stress, the converter achieves nearly zero current switching for the right leg of the full bridge circuit due to the minimized circulating current, and achieves zero voltage switching for the left leg of the full bridge circuit due to the reflected output current during the interval of left leg transition. The converter achieves soft switching for secondary side rectifier and freewheeling diode because at the turn-on time of the primary switching device, the energy recovery snubber provides a low impedance path.
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申请公布号 |
US5946200(A) |
申请公布日期 |
1999.08.31 |
申请号 |
US19960757912 |
申请日期 |
1996.11.27 |
申请人 |
KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE |
发明人 |
KIM, EUN SOO;JOE, KEE YEON;KYE, MOON HO |
分类号 |
H02M3/28;H02M3/335;H02M3/337;H02M7/48;H02M7/5387;(IPC1-7):H02M3/335;H02M3/24;H02M7/538 |
主分类号 |
H02M3/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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