Average and Small-Signal Model of the Four-Switch Buck-Boost Converter under both Duty-Cycle and Phase-Shift Modulation

Gallo, Ezio; Cvejić, Filip; Spiazzi, Giorgio; Biadene, Davide; Caldognetto, Tommaso

doi:10.1109/apec43580.2023.10131591

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2024

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Cited by 3 publications

References 10 publications

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An Optimized Multi-Resonant Switched Tank Converter Based on Partial Power Voltage Regulation

Wang,

Ma,

Tong

et al. 2024

2024 IEEE 19th Conference on Industrial Electronics and Applications (ICIEA)

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An Optimized Multi-Resonant Switched Tank Converter Based on Partial Power Voltage Regulation

Wang,

Ma,

Tong

et al. 2024

2024 IEEE 19th Conference on Industrial Electronics and Applications (ICIEA)

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An Energy-Based Model of Four-Switch Buck–Boost Converters

Gallo,

Biadene,

Cvejić

et al. 2024

IEEE Trans. Power Electron.

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The four-switch buck-boost (FSBB) topology is often used in combination with other isolated converters to extend the voltage range capability of the overall structure. In such applications, the duty-cycles of the two legs of the FSBB are independently controlled, and a phase-shift is typically used to shape the inductor current ripple and thus achieve zero voltage switching. This paper proposes a nonlinear average model, and the corresponding linearized small-signal model for the FSBB operating in the described way. Notably, the proposed approach is based on the modeling of the inductor energy, which allows the correct description of the dynamics related to the phase-shift, in addition to those related to the duty-cycles. The derived models are shown to be in excellent agreement with simulation results and are also validated by measurements on an experimental prototype.

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An Isolated Bidirectional Soft-Switching DC-DC Converter for Wide Input/Output Voltage Range

Spiazzi,

Rossetto,

Mattavelli

et al. 2024

Energies

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This paper presents the analysis and design of an isolated bidirectional DC-DC converter for applications where both input and output voltages may vary in a wide range. The proposed topology is derived from the integration of an isolated Current-Fed Dual-Active-Bridge (CF-DAB) stage with a Four-Switch Buck-Boost cell (4SBB), sharing one switching leg. Detailed design procedures are outlined for both CF-DAB and 4SBB stages, allowing to achieve Zero-Voltage turn-on of all devices while minimizing the inductor current RMS values. An optimized design of the CF-DAB coupled inductors allowed to achieve the desired leakage inductance value without the need for an additional magnetic component. Experimental results taken on a 5 kW prototype interfacing two voltage ports with VL ∈ [42 V, 72 V], VH ∈ [225 V, 435 V] validate the proposed design procedure.

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Average and Small-Signal Model of the Four-Switch Buck-Boost Converter under both Duty-Cycle and Phase-Shift Modulation

Cited by 3 publications

References 10 publications

An Optimized Multi-Resonant Switched Tank Converter Based on Partial Power Voltage Regulation

An Optimized Multi-Resonant Switched Tank Converter Based on Partial Power Voltage Regulation

An Energy-Based Model of Four-Switch Buck–Boost Converters

An Isolated Bidirectional Soft-Switching DC-DC Converter for Wide Input/Output Voltage Range

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