A Novel Low-Loss Modulation Strategy for High-Power Bidirectional Buck ${\bm +}$ Boost Converters

Waffler, S.; Kolar, Johann W.

doi:10.1109/tpel.2009.2015881

Cited by 231 publications

(128 citation statements)

References 15 publications

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“…Using Equation (13) and substituting for i Lm1 , the average current flowing through L 1 can be represented as…”

Section: Step-up Modementioning

confidence: 99%

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Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Shen

Tsai

2017

Energies

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Abstract:In this paper, a novel isolated bidirectional DC-DC converter is proposed, which is able to accomplish high step-up/down voltage conversion. Therefore, it is suitable for hybrid electric vehicle, fuel cell vehicle, energy backup system, and grid-system applications. The proposed converter incorporates a coupled inductor to behave forward-and-flyback energy conversion for high voltage ratio and provide galvanic isolation. The energy stored in the leakage inductor of the coupled inductor can be recycled without the use of additional snubber mechanism or clamped circuit. No matter in step-up or step-down mode, all power switches can operate with soft switching. Moreover, there is a inherit feature that metal-oxide-semiconductor field-effect transistors (MOSFETs) with smaller on-state resistance can be adopted because of lower voltage endurance at primary side. Operation principle, voltage ratio derivation, and inductor design are thoroughly described in this paper. In addition, a 1-kW prototype is implemented to validate the feasibility and correctness of the converter. Experimental results indicate that the peak efficiencies in step-up and step-down modes can be up to 95.4% and 93.6%, respectively.

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“…Using Equation (13) and substituting for i Lm1 , the average current flowing through L 1 can be represented as…”

Section: Step-up Modementioning

confidence: 99%

“…The open H-bridge converter can function as a non-isolated BDC [13]. Even though this converter can achieve ZVS feature and possesses simple structure, its voltage gain is less than 2 at the duty ratio of 0.5.…”

Section: Introductionmentioning

confidence: 99%

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Shen

Tsai

2017

Energies

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“…Moreover, the proposed converter can achieve ZVS and obtain high efficiency through a novel modulation strategy. This paper focuses on improving the efficiency of the bidirectional DC-DC converters proposed in [30]. First, the control signal requirements will be analyzed and extended to universal bidirectional operations (i.e., the capability of operating in all power transferring directions in both buck/boost modes).…”

Section: Operating Principle Of the Universal Bidirectional Dc-dc Conmentioning

confidence: 99%

“…Moreover, they are all isolated type bidirectional DC-DC converters [29]. In [30,31], a novel low loss modulation strategy with simple circuit configuration is proposed. The advantages of these systems include high efficiency, no additional cost and a simple structure.…”

Section: Introductionmentioning

confidence: 99%

“…The advantages of these systems include high efficiency, no additional cost and a simple structure. Although the converter proposed in [30] can achieve universal bidirectional power conversion, details on how to realize universal bidirectional operation is not provided in [30]. Moreover, the phase shift value utilized in these papers is fixed, which may deteriorize the efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Controller Design of a Universal Bidirectional DC-DC Converter

Liu

et al. 2016

Energies

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Abstract:In this paper, first the operating principles of a non-isolated universal bidirectional DC-DC converter are studied and analyzed. The presented power converter is capable of operating in all power transferring directions in buck/boost modes. Zero voltage switching can be achieved for all the power switches through proper modulation strategy design, therefore, the presented converter can achieve high efficiency. To further improve the efficiency, the relationship between the phase-shift angle and the overall system efficiency is analyzed in detail, an adaptive phase-shift (APS) control method which determines the phase-shift value between gating signals according to the load level is then proposed. As the modulation strategy is a software-based solution, there is no requirement for additional circuits, therefore, it can be implemented easily and instability and noise susceptibility problems can be reduced. To validate the correctness and the effectiveness of the proposed method, a 300 W prototyping circuit is implemented and tested. A low cost dsPIC33FJ16GS502 digital signal controller is adopted in this paper to realize the power flow control, DC-bus voltage regulation and APS control. According to the experimental results, a 12.2% efficiency improvement at light load and 4.0% efficiency improvement at half load can be achieved.

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2013

Power Electronics and Energy Conversion Systems

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A Novel Low-Loss Modulation Strategy for High-Power Bidirectional Buck ${\bm +}$ Boost Converters

Cited by 231 publications

References 15 publications

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Analysis and Controller Design of a Universal Bidirectional DC-DC Converter

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