Flyback converter with hybrid clamp

Huber, L.; Jovanovic, M.M.; Song, Haibin; Xu, Daofei; Zhang, Alpha; Chang, Chien-Chung

doi:10.1109/apec.2018.8341306

Cited by 19 publications

(10 citation statements)

References 12 publications

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“…Thus, the transformer also functions as an inductor. To prevent from potential saturation and clamping the voltage spike, a demagnetizing path, RCD clamping circuit [21]- [23] is used as shown in Fig. 2.…”

Section: A Open Loop Simulation Using Psimmentioning

confidence: 99%

Module-Based Laboratory Course for the Industry Sponsored “Research and Design Master Program” in Power Electronics

Chen

Lai

2021

IEEE Access

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The main purpose of this paper is to present a developed modular laboratory course for the industry sponsored "Research and Design Master Program" in power electronics. The objective of this modular laboratory course is for students to (i) Appreciate the theory of power converter with the aid of the state-of-art simulation tools, (ii) Derive the converter model and design the controller, (iii) Understand the magnetic components, (iv) Comprehend the closed-loop control of power converter, and confirm the modeling and controller design, (v) Realize the power converters by PCB layout, magnetic components implementation and debug. Therefore, this modular laboratory course is expected to bring the industry sponsored "Research and Design Master Program" students both systematic learning and hands-on experience. This module-based laboratory course is designed mainly by considering the application of magnetic components to power converters. The designed course modules include (i) Forward converter module for inductor and transformer with center-tapped winding, (ii) Flyback converter module for transformer with air-gap acting as inductor and transformer, (iii) Push-pull converter module for transformer with center-tapped winding and (iv) Half or Full-bridge converter module for driver transformer. The controller design for each module with closed-loop control is included. The designed laboratory course has been given for years and some assessment results will be illustrated. The feedback from the students indicates that this designed modular course receives excellent acknowledgment for providing practical training and covering the wide range of magnetic components as well as controller design in power converter learning.INDEX TERMS Modular laboratory course, modeling and controller design, power converter, R & D master program, state-of-art simulation tools.

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Section: A Open Loop Simulation Using Psimmentioning

confidence: 99%

Module-Based Laboratory Course for the Industry Sponsored “Research and Design Master Program” in Power Electronics

Chen

Lai

2021

IEEE Access

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“…The detailed comparison shown in TABLE IV proves the effectiveness of the optimal design procedure given in Chapter III. The peak efficiency of converters built in [35] and [36] is 96.4% and 96.25%, respectively. However, these converters are operating at a low frequency around 200 kHz.…”

Section: Experiments Verificationmentioning

confidence: 99%

Analysis and Optimal Design of High-Frequency and High-Efficiency Asymmetrical Half-Bridge Flyback Converters

Ouyang

Andersen

2020

IEEE Trans. Ind. Electron.

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The asymmetrical half-bridge (AHB) flyback converter is capable to achieve zero voltage switching (ZVS) and has lower voltage stress compared to the active clamp flyback converter (ACF). This topology gives much margin for components selection and transformer turns ratio design. It is well adapted to voltage step-down applications. However, the optimal design for AHB flyback converter taking current dip effect causing by components parasitic capacitances, and each component effect to power loss into consideration has never been explored. This paper gives detailed operation and mathematical analyses of this effect. The optimal design procedure with the consideration of each circuit parameter is presented in this paper. The transformer benefits low power loss from interleaving winding layout. A 56W/inch 3 1MHz 65W prototype with 100V-250V input is built to verify the feasibility of the converter. Experimental results show the peak efficiency 96.5% is achieved with 127V input and the whole system efficiency under the entire input voltage range is above 93%. Index Term-AHB flyback converter, high efficiency, voltage step down applications

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“…Soft-switching concepts, such as active-clamp flyback (ACF) [Fig. 2 (left)] [13], [14], [20]- [24], or operating in discontinuous conduction mode, as suggested in [21], reduce the losses at turn on, but increase the complexity of the power stage and the control, and the losses at the turn off remain high for most approaches. Furthermore, soft switching in ACF converters requires a minimum negative inductor current, which reduces the light-load efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Resonant One-Step 325 V to 3.3–10 V DC–DC Converter With Integrated Power Stage Benefiting From High-Voltage Loss-Reduction Techniques

Rindfleisch

Wicht

2021

IEEE J. Solid-State Circuits

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This work presents a self-timed resonant highvoltage (HV) dc-dc converter in HV CMOS silicon-on-insulator (SOI) with a one-step conversion from 100-325 V input down to a 3.3-10 V output, optimized for applications below 500 mW, such as IoT, smart home, and e-mobility. Unlike bulky power modules, the HV converter is fully integrated, including an on-chip power stage, with only one external inductor (10 µH) and capacitor (470 nF). It reaches a high power density of 752 mW/cm 3 , an overall peak efficiency as high as 81%, and a light-load efficiency of 73.2% at 5 V and 50 mW output. HV loss-reduction techniques are presented and experimentally confirmed to offer an efficiency improvement of more than 32%. Integrated HV insulated gate bipolar transistors (IGBTs) are discussed and implemented as an attractive alternative to conventional integrated HV power switches, resulting in ∼20% smaller area at lower losses.

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Flyback converter with hybrid clamp

Cited by 19 publications

References 12 publications

Module-Based Laboratory Course for the Industry Sponsored “Research and Design Master Program” in Power Electronics

Module-Based Laboratory Course for the Industry Sponsored “Research and Design Master Program” in Power Electronics

Analysis and Optimal Design of High-Frequency and High-Efficiency Asymmetrical Half-Bridge Flyback Converters

A Resonant One-Step 325 V to 3.3–10 V DC–DC Converter With Integrated Power Stage Benefiting From High-Voltage Loss-Reduction Techniques

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