An improved ZVS-PWM, active clamp/reset forward converter: Analysis, design and dynamic model

Masihuzzaman, Md.; Lakshminarasamma, N

doi:10.1109/compel.2010.5562442

Cited by 4 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The output voltage of this prototype is 15V and the input voltage is 80V, as discussed in (35), the transformer winding ratio is chosen as 4.5, and the duty cycle is 0.42. From (12) and (13), L r , L m and C c are designed as 1.41uH, 168uH and 0.22uF, respectively.…”

Section: Resultsmentioning

confidence: 99%

Study of a SEPIC-input Self-driven Active Clamp ZVS Converter

Cao

Kim

2013

Journal of international Conference on Electrical Machines and

View full text Add to dashboard Cite

-This paper proposes a SEPIC-input, self-driven, active clamp ZVS converter, where an auxiliary winding and a RC delay circuit are employed to drive the active clamp switch and to achieve asymmetrical duty control without any other extra circuits. Based on the fixed dead time and the resonance between capacitors and inductors, both the main switch and the auxiliary switch can rule the ZVS operation. Detailed operation modes are presented to illustrate the self-driven and ZVS principles. Furthermore, an accurate statespace model and the transfer functions of the proposed converter have been presented and analyzed in order to optimize dynamic performance. The model provides efficient prediction of converter operations. Experimental results, based on a prototype with 80V input and 15V/20A output, are discussed to verify the transient and steady performance of the proposed converter.

show abstract

Section: Resultsmentioning

confidence: 99%

Study of a SEPIC-input Self-driven Active Clamp ZVS Converter

Cao

Kim

2013

Journal of international Conference on Electrical Machines and

View full text Add to dashboard Cite

show abstract

“…The active clamp technique is widely used in converter applications for transformer reset, surge suppression, and energy recovery [1][2][3][4][5]. Active clamp forward (ACF) converter can solve some problems of conventional forward converter, such as low duty circle below 50% and high voltage stress of the switch.…”

Section: Introductionmentioning

confidence: 99%

Power loss analysis of active clamp forward converter in continuous conduction mode and discontinuous conduction mode operating modes

Zhang

Yao

et al. 2013

IET Power Electronics

View full text Add to dashboard Cite

In order to improve the light-load efficiency of active clamp forward converter with synchronous rectifier (SR), power loss analysis of the converter operating in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) are presented in this study. The light-load efficiency of normal ACF converter with SR is low because the output inductor current can go negative when operating in CCM. Considering the fixed frequency control only, to shift the converter's operating mode from CCM to DCM at a critical point of output current at light-load is a solution for efficiency improvement. Based on the CCM and DCM power dissipation models proposed in this study, the power loss characteristics of the converter are analysed, and the critical shift point of output current can be derived, which has also been verified by an experimental prototype.

show abstract