Bidirectional secondary LLC resonant converter using auxiliary switches and inductor

Kim, Eun-Soo; Park, Jun-Hyoung; Jeon, Young Hoon; Kong, Young-Su; Lee, Seungmin; Kim, Kwangseob

doi:10.1109/apec.2014.6803572

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…In order to realize the same resonant characteristics under forward and reverse power flow directions, an ac power switch and parallel inductor are connected to the half-bridge leg on the high-voltage side. The proposed circuit and the conventional bidirectional resonant converters in [17][18][19] have the same resonant component counts. However, the proposed converter has less circulating current loss due to the fact that the parallel inductor is disconnected under forward power flow.…”

Section: Proposed Convertermentioning

confidence: 99%

“…However, the characteristic of a series resonant converter cannot be achieved at the whole load range in reverse power flow (or boost operation) due to the circuit topologies in the buck and boost operations not being symmetric circuits. In [17][18][19], the circuit topologies with half-bridge or full-bridge converters in both power flows are symmetric so that the power devices can be turned on under zero voltage and low switching losses. However,…”

Section: Introductionmentioning

confidence: 99%

“…However, high circulating current losses and high switching losses on light load are the main shortcomings. Resonant converters [16][17][18][19] with frequency modulation have been studied to achieve soft switching characteristics and bidirectional power flow capability. However, the circuit characteristics under forward and reverse power flow directions are different.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bidirectional Resonant Converter with Half-Bridge Circuits: Analysis, Design, and Implementation

Lin

2018

Energies

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A soft-switching dc-dc converter with bidirectional power flow capability is studied in this paper for energy storage units or electric vehicle applications. The circuit topology of the studied converter is constructed using a dual half-bridge circuit with split capacitors. A series resonant tank with frequency control modulation is employed in the proposed circuit to realize the soft switching characteristics of active devices. Synchronous-rectifier-based Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFETs) are used on the low-voltage side to lessen conduction loss on the power semiconductors. The benefits of the studied circuit are bidirectional power flow capability, high efficiency, low switching loss, and simple circuit structure. The achievability of the developed converter is demonstrated from test results with a scaled-down laboratory prototype.

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Section: Proposed Convertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bidirectional Resonant Converter with Half-Bridge Circuits: Analysis, Design, and Implementation

Lin

2018

Energies

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“…To reduce air pollution and climate change, renewable energy sources with power electronic conversion have been demanded and developed in recent years. Bidirectional power converters [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] have been developed for alternating current (ac) to direct current (dc) conversion and dc-dc conversion. In references [1][2][3][4][5][6][7], ac-dc bidirectional power converters are employed between an ac power source and dc bus voltage, and dc-ac bidirectional power converters are widely employed in ac drive systems.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional DC Converter with Frequency Control: Analysis and Implementation

Lin

Huang

2018

Energies

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In this paper, a direct current (dc) converter with the abilities of bidirectional power transfer and soft switching characteristics is studied and implemented. The circuit schematic of the developed dc converter is built by a half-bridge converter and a center-tapped rectifier with synchronous rectifier. Under forward power transfer, a half-bridge circuit is controlled to regulate the low-voltage side at a stable value. For backward power transfer, a center-tapped rectifier with synchronous rectifier is regulated to control the high-voltage side at the desired voltage value, and the half-bridge circuit is operated as a voltage doubler rectifier. Active power devices are operated at zero-voltage switching using a series resonant technique on the high-voltage side with frequency modulation and inductive load operation. The practicability of the developed converter is established from experiments with a laboratory prototype circuit.

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“…The synchronous Class-E rectifier has been described in [10] and [11], and a bidirectional full-bridge class-E converter is implemented in [12] running at several hundred kilohertz. Bidirectional LLC converter have been used in different setups and shown that resonant converters are very suitable as bidirectional converter [13]- [15]. The bidirectional Class-E converter topology described in this paper could be suitable for many applications were size and price is a key consideration.…”

Section: Introductionmentioning

confidence: 99%

Self-oscillating galvanic isolated bidirectional Very High Frequency DC-DC converter

Pedersen

Madsen

Knott

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This paper describes a galvanic isolated bidirectional Very High Frequency (VHF = 30 MHz -300MHz) Class-E converter. The reason for increasing the switching frequency is to minimize the passive components in the converter. To make the converter topology bidirectional the rectifier has to be synchronous. This increases the complexity of the gate drives, which in this paper is solved by using a self-oscillating gate drive. A bidirectional converter has been implemented and is described in this paper; the converter reaches efficiencies above 80% in forward conduction mode and 73.5% in reverse conduction mode. The designed converter operates at a switching frequency of 35.6 MHz, which is well within the VHF range. The same converter is also implemented with PCB embedded inductors to minimize cost and the physical volume of the total converter. 978-1-4799-6735-3/15/$31.00 ©2015 IEEE

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Bidirectional secondary LLC resonant converter using auxiliary switches and inductor

Cited by 8 publications

References 8 publications

Bidirectional Resonant Converter with Half-Bridge Circuits: Analysis, Design, and Implementation

Bidirectional Resonant Converter with Half-Bridge Circuits: Analysis, Design, and Implementation

Bidirectional DC Converter with Frequency Control: Analysis and Implementation

Self-oscillating galvanic isolated bidirectional Very High Frequency DC-DC converter

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