• Proceedings of the KIPE Conference
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• 2000.07a
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• pp.400-403
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• 2000

This paper deals with the active clamp ZVS flyback converter for semiconductor plasma etching system. The proposed converter has the characteristics of the good power facter low switching noise and efficiency improvement. The characteristics are verified through simulation results. Furthermore the ringing effect due to output capacitance of the main switch can be eliminated by use of active clamp circuit.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.64-65
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• 2008

The topology of active clamp forward converter provides ZVS characteristic and also the stress of voltage and current is smaller than that of the conventional forward converters. The benefits of this technique include a higher efficiency at a high switching frequency, lower EMI/RFI. In this paper, the active clamp forward converter is designed for operation in wide range voltage and has 19.5V/120W ratings with efficiency more than 90%.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.386-389
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• 2002

This paper proposes the boost input type active clamp forward ZVS(zero voltage switching) DC-DC converter which can provide high efficiency and improved EMI characteristics. Moreover, it has active clamp circuit for reducing the voltage stress and zero voltage switching technique for minimizing switching loss. The detailed operation principles and the simulation results are presented.

• Journal of Electrical Engineering and information Science
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• v.3 no.3
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• pp.366-372
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• 1998

A high efficiency interleaved active clamp forward converter with self driven synchronous rectifiers for a modular power processor is presented. To simplify the gate drive circuits, N-P MOSFETs coupled active clamp method is used. An efficiency about 90% for the load range of 50-100% is achieved. The details of design for the power stage and current mode control circuit are provided, and also some experimental results are given.

• Proceedings of the KIEE Conference
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• summer
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• pp.1235-1238
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• 2004

This paper presents the large-signal transient analysis of a self-driven active-clamp forward converter, eliminating the extra drive circuit for the active clamp switch. The operation principle of the converter was presented and experiential results were used to verify the analyzed results. A 50-W prototype converter built and tested it. From the tested results, input transient response and load transient response of the converter were established.

• Proceedings of the KIPE Conference
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• 2001.07a
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• pp.510-513
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• 2001

In this paper, an application of asymmetrical duty control method to a boost input type active clamp DC-DC converter is discussed. In order to verify the discussed results, a 50W prototype converter is built and is tested. Through the experimental results an asymmetrical controlled boost input type active clamp converter is validated.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.403-404
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• 2014

전기 자동차 및 하이브리드 자동차는 차량의 12V 부하에 전원을 공급하고 12V 배터리를 충전시키기 위해 DC/DC 컨버터를 사용한다. 이 DC/DC컨버터를 LDC(Low voltage DC/DC Converter)라 한다. 본 논문에서는 Active Clamp 방식의 포워드 컨버터를 이용하여 소용량 LDC를 개발한 내용을 소개 하였다.

• Proceedings of the KIPE Conference
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• 2003.07a
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• pp.73-76
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• 2003

A zero voltage soft switching inverter using active clamp is presented for induction heating application. This converter have long been attractive because of its simplicity, high efficiency, and low cost compared to other schemes. In addition to those merits, Input power factor can be improved with a variable frequency control. In this paper, it describe the control method and operational principle to improve a power factor with a single stage US converter using active clamp for induction heating application.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2002.11a
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• pp.287-291
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• 2002

This paper presents active-clamp class-E high frequency resonant inverter with single-stage. The proposed circuit is integrated active-clamp class-E circuit to boost converter with the function of power factor correction. Boost converter is operated in positive and negative half cycle respectively at line frequency(60Hz), Such a operating in discontinuous conduction mode(DCM) of boost converter performs high power factor. By adding active-clamp circuit in class-E inverter, main switch of inverter part is operated not only ZVS(Zero Voltage Switch) but also reduced the switching voltage stress of main switch. This paper shows that simulation result using Psim 4.1 prove the validity of theoretical analysis. This proposed inverter will be able to be practically used as a power supply in various fields as induction heating applications, DC-DC converter etc.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.6
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• pp.1064-1069
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• 2010

Active clamp forward converter provides zero voltage switching, low voltage stress and wide input voltage range. The design technique leads to getting a higher efficiency under high switching frequency and optimal operating range. It is designed for notebook computer adapter with free input voltage and 19.5V/120W output ratings. The efficiency is measured to more than 90%. One of the most important circuit parts is the filter inductor besides the transformer in active clamp forward converter. In this paper, the process of inductor design is listed optimally.