1. Highly Efficient Current-Fed Half-Bridge Resonant Converter for Pulse Power Applications
- Author
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Hwasoo Seok, Minsung Kim, Suk-Ho Ahn, Jong-Won Lim, Changkyu Bai, and Hassan Jamil
- Subjects
Voltage doubler ,Materials science ,business.industry ,Electrical engineering ,Pulsed power ,AC power ,law.invention ,Stress (mechanics) ,Capacitor ,Duty cycle ,law ,Modulation ,Hardware_INTEGRATEDCIRCUITS ,Electrical and Electronic Engineering ,business ,Voltage - Abstract
This article proposes a highly efficient current-fed half-bridge resonant converter over a wide range of the output voltages. By adding a bidirectional switch across center nodes of the voltage doubler and applying corresponding switching modulation, the converter accomplishes almost zero-voltage switching at the turn-off instant under the wide output voltage variations. Moreover, the circuit experiences very little instantaneous reactive current even when the output voltage varies widely. Primary-side duty cycle fixed at 0.5 balances the voltages across the capacitors at the primary side and at the secondary side each irrespective of the output voltage variation; it also limits the voltage stress at the active power components. Therefore, the proposed converter delivers high efficiency and compact component size. We fabricated a 400-W experimental prototype to validate the superior properties of the proposed converter.
- Published
- 2022