A new ZVS DC/DC converter with fully regulated dual outputs

Seong, Hyun-Wook; Kim, D.J.; Cho, G.H.

doi:10.1109/pesc.1993.471907

Cited by 18 publications

(7 citation statements)

References 8 publications

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“…From a power electronics point of view, the suspension control power supply is essentially a multiple‐output DC–DC converter. The traditional design employs pulse‐width‐modulation (PWM) type converters with multi‐secondary windings . In these PWM converters, feedback control circuits regulate only one output while the others are dependent on the secondary winding turns ratio, which is one cost‐effective method.…”

Section: Introductionmentioning

confidence: 99%

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Double resonant tank LLC‐DCX based two‐stage power supply for magnetic levitation control system applications

Liu

Yang

et al. 2015

Circuit Theory & Apps

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SUMMARYMagnetic levitation train power supply systems, or Maglev, are most commonly powered by 330-V highvoltage direct current power systems. The power supply for maglev control system is used to provide a stable voltage to the suspension control circuit, which is the key part of Maglev trains. The suspension control power supply is typically a DC-DC converter with a high voltage input and multiple low voltage outputs. The traditional solutions typically lead to the following issues, such as uncontrolled duty ratio, poor cross-regulation capability, and low reliability. In order to solve these problems, a novel two-stage solution employing a double resonant tank LLC DC transformer (LLC-DCX) is proposed and developed in this paper. The proposed solution not only increases the overall conversion efficiency significantly because of the achieved soft-switching over the entire operation range, but also realizes the low input current ripple and high reliability owing to a uniform thermal distribution. A 210-W, 220-380-V input laboratory prototype with four outputs is fabricated and tested, and the experimental results are presented in this paper. The declared features of the proposed solution are well demonstrated by the experimental results.

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Section: Introductionmentioning

confidence: 99%

“…However, the overall conversion efficiency, complexity, and cost have to be sacrificed. In the aforementioned solutions, hard‐switching PWM topologies such as fly‐back, forward, half‐bridge, and push–pull are usually employed . Thus, low efficiency is their common shortcoming.…”

Section: Introductionmentioning

confidence: 99%

Double resonant tank LLC‐DCX based two‐stage power supply for magnetic levitation control system applications

Liu

Yang

et al. 2015

Circuit Theory & Apps

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“…For a desired suspension control power supply, the following requirements have to be satisfied: (1) accurate and independent voltage regulation, (2) galvanic isolation between input and output, as well as isolation among multiple outputs, (3) high efficiency and power density, (4) high reliability and uniform thermal distribution, and (5) simple control method. From a power electronics point of view, the suspension control power supply is essentially a multiple-output DC-DC converter.…”

Section: Introductionmentioning

confidence: 99%

“…From a power electronics point of view, the suspension control power supply is essentially a multiple-output DC-DC converter. The traditional design employs pulse-width-modulation (PWM) type converters with multi-secondary windings [1]. In these PWM converters, feedback control circuits regulate only one output while the others are dependent on the secondary winding turns ratio, which is one cost-effective method.…”

Section: Introductionmentioning

confidence: 99%

Two-stage power supply based on double resonant tank LLC-DCX for magnetic levitation control system applications

Liu

Wang

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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330V high-voltage direct current (HVDC) power system is a preferred option of the magnetic train power supply system. The power supply for magnetic levitation control system is used to provide stable operation voltage to the suspension control circuits, which is the key part of magnetic train. The suspension control power supply is typically the converter with high input voltage and low multiple output voltages. The traditional solutions have these problems, such as uncontrolled duty ratio, poor cross-regulation rate, and low reliability. In order to solve these limits, a novel two-stage solution employing the double resonant tank LLC-DCX is proposed and developed in this paper, which can overcome the problems in traditional design. The proposed solution not only can increase the overall conversion efficiency significantly because of the achieving soft-switching over the entire operation range, but also can achieve the low input current ripple and high reliability owing to the uniform thermal distribution. A 210-W, 220-380V input prototype with four outputs, is fabricated and tested in the lab, and the results are presented in this paper. The declared features are demonstrated well by the experimental results.

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“…The simplest way to provide the multiple voltage levels is to add the secondary windings of the transformer and use the post-regulators (PRs). The PRs could be the magamp [1,2], synchronous switch post-regulator (SSPR) [3], controlled transformer [4] or even the switching frequency [5]. The PR multiple-output converter could be deduced from any type of single-output converters that include a transformer.…”

Section: Introductionmentioning

confidence: 99%

Multiple-output DC-DC converters with the shared leg structure: Basic topologies, ZVS analysis and experimental results

Chen

Nie

Pan

et al. 2010

2010 IEEE Energy Conversion Congress and Exposition

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A family of multiple-output converters with the shared leg structure is analyzed, summarized and generalized in this paper. Since the full bridge (FB) and half bridge (HB) converters include the same bridge-leg structure, one of these legs can be shared by the appropriate design. With the shared leg, many benefits can be obtained: the structure is compact; all the outputs are still tightly regulated; moreover, the zerovoltage-switching (ZVS) range in the shared legs is extended naturally. The basic shared leg topologies, including the FB-AHB (asymmetrical half bridge), FB-RHB (resonant half bridge) and FB-FB topologies are discussed in this paper. Three types of ZVS characteristics in the shared leg are extracted from these basic shared leg topologies. The experiment results are also given to verify the validity of the analysis.Index Terms--dc-dc power conversion, shared leg, PWM, PFM, zero-voltage-switching (ZVS)

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A new ZVS DC/DC converter with fully regulated dual outputs

Cited by 18 publications

References 8 publications

Double resonant tank LLC‐DCX based two‐stage power supply for magnetic levitation control system applications

Double resonant tank LLC‐DCX based two‐stage power supply for magnetic levitation control system applications

Two-stage power supply based on double resonant tank LLC-DCX for magnetic levitation control system applications

Multiple-output DC-DC converters with the shared leg structure: Basic topologies, ZVS analysis and experimental results

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