Characterization of an active clamp flyback topology for power factor correction applications

Watson, R.; Hua, Guichao; Lee, F.C.

doi:10.1109/apec.1994.316369

Cited by 54 publications

(19 citation statements)

References 2 publications

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“…However, due to the leakage inductance of the transformer, the bidirectional flyback converter is subjected to great voltage oscillation and switching stress when the switch is off [9]. Compared with flyback converter, Push-pull DC-DC converter requires two semiconductor switches, and the system frequency is doubled.…”

Section: Literature Reviewmentioning

confidence: 97%

Design of closed-loop control system for a bidirectional full bridge DC/DC converter

Wang

Wang²,

Rong

2017

Applied Energy

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Section: Literature Reviewmentioning

confidence: 97%

Design of closed-loop control system for a bidirectional full bridge DC/DC converter

Wang

Wang²,

Rong

2017

Applied Energy

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“…Active clamp technology is applied to the PFC stage to achieve high system efficiency [13][14][15]. In fact, the FB RCC does not affect the DC value of V LED and I LED and only compensates the double-line-frequency AC component in the LED voltage.…”

Section: E Pfc and Led Current Regulationmentioning

confidence: 99%

A novel bipolar series Ripple compensation method for single-stage high-power LED driver

Qiu

Wang

Liu

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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It has been well documented that series compensation (SC) configuration can significantly reduce the total output capacitance of LED driver without sacrificing the power factor (PF), thus enabling the use of long-life film capacitors. Most importantly, SC provides the advantages over the parallel compensation (PC) methods in that it reduces the voltage stresses of the auxiliary stage components and thus can provide a higher efficiency, which is especially desirable for highpower LED drivers. However, with conventional series compensation, the auxiliary stage requires an auxiliary winding from the main stage. This increases the cost as well as the complexity of the circuit design. In this paper, a novel FullBridge Ripple Compensation Converter (FB RCC) using floating capacitor is proposed. By innovatively controlling the power flow of this auxiliary circuit, the auxiliary winding can be eliminated, thus making the input side of the auxiliary circuit floating and rendering a more cost effective and more flexible solution for both isolated and non-isolated LED driver applications. The new ripple compensation method retains the outstanding ripplecancellation ability and high efficiency of the original SC method, and has been demonstrated in a 100W, 150V-0.7A experimental prototype. I.978-1-4799-6735-3/15/$31.00 ©2015 IEEE

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“…The passive one use only passive components to achieve zero-current transition at turnoff [2][3][4][5]. The active one incorporate passive components and auxiliary active switches to achieve soft-switching commutation [6,7], which increases cost significantly. Thus, a converter with passive soft-switching feature is more attractive to low power applications.…”

Section: Convertermentioning

confidence: 99%

Flyback converter using single-capacitor snubber for auto-tuning fan speed system

Chang

Tseng

Chen

et al. 2009

2009 International Conference on Power Electronics and Drive Systems (PEDS)

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This paper presents flyback converter combined with single-capacitor turn-off snubber for auto-tuning fan rotational speed system. The proposed system can automatically regulate rotational speed of fan, depending on temperature in the chassis of the equipments. Its control algorithm is to regulate output voltage of the proposed converter. With this approach, the wear and tear of the bearing of fan can be reduced and the circuit structure compared with the conventional two stage driving circuit can be simplified. Therefore, the proposed system can raise conversion efficiency, reduce component count, weight and size. Moreover, in order to further increase conversion efficiency of the proposed system, a single-capacitor turn-off snubber is adopted to reduce switching loss at turn off transition, Finally, a prototype under output voltage varied from 5V~12V and maximum output power of 200W has been implemented to prove the feasibility of the proposed auto-tuning fan rotational speed system.

show abstract

Characterization of an active clamp flyback topology for power factor correction applications

Cited by 54 publications

References 2 publications

Design of closed-loop control system for a bidirectional full bridge DC/DC converter

Design of closed-loop control system for a bidirectional full bridge DC/DC converter

A novel bipolar series Ripple compensation method for single-stage high-power LED driver

Flyback converter using single-capacitor snubber for auto-tuning fan speed system

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