A new synchronous-switch post regulator for multi-output forward converters

Lin, Yizhe; Liu, K.H.

doi:10.1109/apec.1990.66371

Cited by 42 publications

(9 citation statements)

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“…However, the high cost and large size of the mag-amp post regulator has limited its wide application. The synchronous-switch post regulation (SSPR) [4]- [7] is another way suitable for high output current application, which utilizes the MOSFET device as the post regulator. SSPR has many advantages over mag-amp post regulator, such as easier over current protection, easier remote on/off control implementation, and smaller size.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Zhang

2007

IEEE Trans. Power Electron.

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An accurately regulated multiple-output zero-voltage switching (ZVS) dc-dc converter is proposed. The converter is composed of three outputs altogether. The first and second outputs are regulated through the duty cycle control of two asymmetrical half bridge converters, while the third output is regulated through the phase shift of the two asymmetrical half bridge converters. The characteristic of this multiple-output dc-dc converter is analyzed and design process is investigated. ZVS is realized for all the main switches. Therefore this multiple-output dc-dc converter can operate with higher efficiency at higher switching frequency. The operation stages, ZVS condition and control detail are also presented. A 400 V input, 48 V/10 A, 5 V/20 A, 12 V/5 A outputs prototype is built to verify the design. The efficiency at rated input voltage full load is 93.36%.

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Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Zhang

2007

IEEE Trans. Power Electron.

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“…However, tight regulation is not achieved by both kinds of magnetic coupling, so additional continuous series regulator (such as linear regulator) is required. † SSPR [9][10][11][12][13][14][15][16][17][18][19][20][21][22]: In a conventional SSPR [9], the main output is regulated by pulse-width modulation (PWM) feedback control and the volt-seconds of other outputs are regulated by a controllable device such as magnetic amplifier [10,11] or MOSFET [12][13][14][15], which is used to block certain volt-seconds from the incoming winding voltage to achieve extra PWM. Each output has its own feedback controller, hence SSPR have the advantages of tight output voltage regulation and excellent dynamic response.…”

Section: Introductionmentioning

confidence: 99%

A soft‐switching post‐regulator for multi‐outputs dual forward DC/DC converter with tight output voltage regulation

Wen

Zhang

et al. 2013

IET Power Electronics

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An improved soft-switching post-regulator topology for multi-outputs dual forward DC/DC converter is presented. A delay-trailing modulation method is proposed. ZVSZCS on/zero-current-switching off conditions can be realised on both the primary MOSFETs and the secondary rectifying diodes. Excellent decoupling among different outputs and tight output voltage regulation are achieved. The efficiency is improved due to single power-conversion stage and share in the primary components. The operating principle and main feature of this improved topology are analysed. Key design issue including zero-voltageswitching operation, maximum duty ratio of the primary side MOSFETs and parameter determination for the primary magnetising inductor and the secondary additional redistribution capacitor are discussed. Finally, an experimental prototype with two outputs (300-400 V input, 48 V, 6.5 A and 24 V, 11 A outputs) is built to verify the theoretical analysis. The measured efficiency at normal operation input voltage (400 V) is improved by about 0.5-2%, and the measured efficiency under light loads is improved by more than 2%.

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“…For medium and high output current applications, linear regulators would be very inefficient as they work in the active region where the effective resistance of the switch is high. Magnetic amplifier post regulators [2][3] have higher efficiency and the ability to handle high currents. However, they are more expensive and also bulky and this has limited their wide application.…”

Section: Introductionmentioning

confidence: 99%

Control of an asymmetric PWM and FM-LCC dual output converter

Sundararaman

Dhanalakshmi

Gopalakrishnan

2011

2011 International Conference on Recent Advancements in Electrical, Electronics and Control Engineering

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This paper discusses the control of a dual output half bridge converter. Two independent regulated outputs are obtained with a single leg consisting of two switches. One of the two outputs is regulated through the switching frequency of an LCC (Inductor-Capacitor-Capacitor) resonant converter and the other output is controlled through duty cycle by asymmetrical pulse width modulation. The outputs are regulated over a wide range of input voltages and load variations. Cross regulation between the outputs is minimal due to independent control of each output. Zero voltage switching is also realized in the topology and higher switching frequencies are possible. The simulation and experimental results obtained for a converter with 48V input and 12V/20A and 5V/10A outputs are discussed.

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A new synchronous-switch post regulator for multi-output forward converters

Cited by 42 publications

References 0 publications

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

A soft‐switching post‐regulator for multi‐outputs dual forward DC/DC converter with tight output voltage regulation

Control of an asymmetric PWM and FM-LCC dual output converter

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