Analysis and Design of Full-Bridge Converter With a Simple Passive Auxiliary Circuit Achieving Adaptive Peak Current for ZVS and Low Circulating Current

Yang, Xiaoguang; Li, Yuqi; Zheng, Guoqiang; Xi, Ligen; Wen, Jing

doi:10.1109/jestpe.2020.2988281

Cited by 16 publications

(13 citation statements)

References 41 publications

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“…In steady state,

I_{normalp} false(t_{5} false)

= −

I_{normalp} false(t_{0} false)

. Since there is no decoupling stage on the primary and secondary sides of the transformer, the realization of ZVS does not depend on the leakage inductance like the traditional PS‐FB, 22 which greatly contributes to the realization of ZVS operation. Stage 1 (

t_{0} – t_{1}

): At

t_{0}, {normalQ}_{2}

is turned off,

i_{normalp} false(t false)

is transferred from

{normalQ}_{2}

to C 2 and C 4 , and the voltage

V_{AB} false(t false)

starts to rise and reaches

V_{in}

at the end of the stage.…”

Section: Equalization Charger and Operation Principlementioning

confidence: 99%

“…As shown in Figure 2, the ZVS condition of the lagging leg of the PS‐FB converter depends on

I_{normalp} false(t_{0} false)

given in (11). As long as the lagging leg can achieve ZVS operation, the leading leg can also achieve ZVS operation 22 . The value of

I_{o_av}

can be adjusted by controlling the PS angle α .…”

Section: Analysis Of Proposed Equalization Chargermentioning

confidence: 99%

“…Compared with the traditional phase‐shift (PS) FB converter, the proposed equalization charger is easier to realize zero voltage switching (ZVS) operation. This is because there is no decoupling stage between the primary of the transformer and the secondary of the transformer, and the realization of ZVS is not determined by the leakage inductance like the traditional PS‐FB converter, 22 so it is of great help to the converter to realize ZVS. The comparison between the proposed equalization charger and similar equalization chargers is shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…In steady state, I p ðt 5 Þ = À I p ðt 0 Þ. Since there is no decoupling stage on the primary and secondary sides of the transformer, the realization of ZVS does not depend on the leakage inductance like the traditional PS-FB, 22 which greatly contributes to the realization of ZVS operation.…”

Section: Introductionmentioning

confidence: 99%

“…As long as the lagging leg can achieve ZVS operation, the leading leg can also achieve ZVS operation. 22 The value of I o a v can be adjusted by controlling the PS angle α. The relational expressions given in (11) and ( 12) are helpful to the design of the proposed equalization charger.…”

Section: Introductionmentioning

confidence: 99%

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An equalization charger based on phase‐shift full‐bridge converter with an n‐stage current rectifier

Yang

Wang

Jia

et al. 2022

Circuit Theory & Apps

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Summary A traditional charging system is composed of a charger and a separate voltage equalizer. By integrating the voltage equalization circuit into the charger as an equalization charger, the components can be reduced, and the system can be simplified. The equalization charger consists of two functional parts: The front stage generates a PWM voltage wave, and the rear stage generates multiple uniform output voltages. In this paper, a new n‐stage current rectifier (CR) is proposed as the rear stage, which has higher power conversion efficiency than traditional voltage multipliers. The full‐bridge (FB) converter is selected as the front stage and combined with the n‐stage CR to form a phase‐shift (PS) FB converter, which can realize zero voltage switching (ZVS) operation under light load conditions. The basic working principle of the equalization charger is described, and analytical models for converter design are derived. A prototype for three battery modules was built and tested under the condition of initial voltage unbalance. Experimental results show that the proposed equalization charger has good voltage equalization characteristics, and the standard deviation is as low as about 4 mV. Experimental results show that all switches can achieve ZVS under light load conditions.

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“…In steady state,

I_{normalp} false(t_{5} false)

= −

I_{normalp} false(t_{0} false)

t_{0} – t_{1}

): At

t_{0}, {normalQ}_{2}

is turned off,

i_{normalp} false(t false)

is transferred from

{normalQ}_{2}

to C 2 and C 4 , and the voltage

V_{AB} false(t false)

starts to rise and reaches

V_{in}

at the end of the stage.…”

Section: Equalization Charger and Operation Principlementioning

confidence: 99%

“…As shown in Figure 2, the ZVS condition of the lagging leg of the PS‐FB converter depends on

I_{normalp} false(t_{0} false)

given in (11). As long as the lagging leg can achieve ZVS operation, the leading leg can also achieve ZVS operation 22 . The value of

I_{o_av}

can be adjusted by controlling the PS angle α .…”

Section: Analysis Of Proposed Equalization Chargermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An equalization charger based on phase‐shift full‐bridge converter with an n‐stage current rectifier

Yang

Wang

Jia

et al. 2022

Circuit Theory & Apps

Self Cite

View full text Add to dashboard Cite

show abstract

Variations on the Conventional Zero‐voltage‐switching Dc–dc PWM Full‐bridge Converter

2023

DC–DC Converter Topologies

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Phase‐shifted full‐bridge converter based on an adjustable current auxiliary circuit with full load range ZVS and small duty cycle loss

Gao

Tang

Kan

et al. 2022

Circuit Theory & Apps

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In this paper, a phase-shifted full-bridge converter based on an adjustable current auxiliary circuit is proposed. The converter's switches achieve ZVS with the help of the parallel current provided by the auxiliary circuit. The conduction loss of the parallel current is reduced since the magnitude of the current can be adjusted by the variable inductor. Since there is no additional series inductor, the duty cycle loss of the proposed converter is minimal. Moreover, the oscillating voltage on the secondary side decays quickly, indicating that the energy involved in the oscillation is small, which is beneficial to reduce the loss of the RCD. The experimental platform is built. On this basis, theoretical analysis and experimental verification are carried out in this paper.duty cycle loss, parallel current, phase-shifted full-bridge (PSFB), variable inductor, zerovoltage switching (ZVS) | INTRODUCTIONPhase shifted full bridge converters are widely used in communication, aerospace, and other fields because of their simple structure, ZVS characteristics, high reliability, and other advantages. However, the lagging-leg switches of conventional phase-shifted full-bridge converters cannot realize ZVS under light load, which will reduce the efficiency and cause electromagnetic interference. And the conduction loss of the primary side circulating current increases with the phase shift angle. Moreover, the voltage oscillation on the secondary side diode increases its voltage stress. These disadvantages limit the higher efficiency and higher power density of the PSFB converter.The PSFB converter first proposed in Steigerwald and Ngo 1 has a simple structure, including a full bridge, transformer, rectifier diode, and LC filter. At present, many improved topologies have been proposed to eliminate the above disadvantages. The common method is to increase the inductance in series with the transformer, which can be realized by adding a series inductor or increasing the leakage inductance of the transformer. 2,3 This method can broaden the ZVS range of switches; that is, the switches can realize ZVS under light load. However, the commutation of the primary side current is slow due to the increase of the series inductance, which leads to a large duty cycle loss under heavy load.

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Analysis and Design of Full-Bridge Converter With a Simple Passive Auxiliary Circuit Achieving Adaptive Peak Current for ZVS and Low Circulating Current

Cited by 16 publications

References 41 publications

An equalization charger based on phase‐shift full‐bridge converter with an n‐stage current rectifier

An equalization charger based on phase‐shift full‐bridge converter with an n‐stage current rectifier

Variations on the Conventional Zero‐voltage‐switching Dc–dc PWM Full‐bridge Converter

Phase‐shifted full‐bridge converter based on an adjustable current auxiliary circuit with full load range ZVS and small duty cycle loss

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