抄録
This paper is concerned with an improved bidirectional zero-current switching (ZCS) quasiresonant type single-ended soft-switching mode DC-DC converter with a HF center-tapped transformer link and ZCS commutated diode rectifier which is capable of minimizing switching losses of a power device, its electrical stresses and electromagnetic interference (EMI/RFI) noises. This converter topology can efficiently operate under a simple frequency-regulation strategy in the ultrasonic frequency ranges.
The advanced exact computer-aided simulating analysis of the new converter circuit is presented introducing the normalized frequency variable and circuit system parameters. The open-loop/closed-loop steady-state voltage regulation characteristics in a variable frequency-modulation mode are illustrated and discussed in the normalized general-purpose expressions in addition to the load variation performance.
The feasible high-power density SMPS breadboard with a full-wave quasi-current resonant switch assembly using a single MOS-gate switching power semiconductor device is originally developed and investigated, which is optimally designed for a distributed low voltage large current power supply system. Its experimental results in the PFM control implementation are demonstrated as compared with the exact simulation ones from a practical point of view.
