A ZVZCS PWM FB DC/DC converter using a modified energy-recovery snubber
Eun-Soo Kim
Yoon-Ho Kim
Dept. of Electr. & Electron. Eng., Jeonju Univ.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct 2002
Volume: 49,
Issue: 5
On page(s): 1120- 1127
ISSN: 0278-0046
INSPEC Accession Number: 7413706
Digital Object Identifier: 10.1109/TIE.2002.803237
Current Version Published: 2002-11-07
Abstract
The conventional high-frequency phase-shifted zero-voltage-switching (ZVS) full-bridge DC/DC converter has a disadvantage, in that a circulating current flows through transformer and switching devices during the freewheeling interval. Due to this circulating current, RMS current stress, conduction losses of the transformer and switching devices are increased. To alleviate this problem, this paper proposes an improved zero-voltage zero-current switching (ZVZCS) phase-shifted full-bridge (FB) DC/DC converter with a modified energy-recovery snubber (ERS) attached at the secondary side of transformer. Also, the small signal model of the proposed ZVZCS FB DC/DC converter is derived by incorporating the effects introduced by a transformer leakage inductance and an ERS to achieve ZVZCS. Both analysis and experiment are performed to verify the proposed topology by implementing a 7-kW (120 VDC, 58 A) 30-kHz insulated-gate-bipolar-transistor-based experimental circuit.
Index
Terms
Available to subscribers and IEEE members.
References
Available to subscribers and IEEE members.
Citing Documents
Available to subscribers and IEEE members.
Cart
