Study of a high step-up voltage gain DC/DC converter with passive lossless clamp circuit

Tang, Yu; Wang, Ting; He, Yuqing; Fu, Dongjin

doi:10.1109/iecon.2013.6699321

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…The above-mentioned boost converter has problems such as insufficient gain range, excessive switching stress of the device, and EMI (electromagnetic interference) problems. Compared to the high gain converters, the dual switch converter has the advantages of simple structure, high efficiency, low voltage, and current stress [6], while the asymmetric structure induces the unbalance across the power switches. A symmetric dual switch converter is derived to overcome the above disadvantage, it has the advantages of symmetrical circuit structure, internal voltage clamping, small EMI, etc.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Symmetric Dual Switch Converter under High Switching Frequency Conditions

2020

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Electric vehicle batteries have the problem of low output voltage, so the application of a high-gain converter is a research hotspot. The symmetrical dual-switch high gain converter has the merits of simple structure, low voltage and current stress, and low EMI. Due to the deterioration of circuit performance caused by circuit parasitic parameters under high frequency operating conditions, the former analysis under low frequency condition cannot satisfy the requirements for performance evaluation. To clarify whether the symmetrical dual-switch high-gain converter can maintain its operating characteristics under high-frequency operating conditions, this paper establishes the converter model considering parasitic parameters, and deduces the sneak circuit modes at high frequency. The effects of parasitic parameters at high frequency on voltage gain, switch stress, and symmetrical operating are analyzed, which is beneficial for the selection and optimization of power devices. This paper believes that considering parasitic parameters may reduce the output gain of the symmetrical double-switch high-gain converter considering parasitic parameters under high frequency conditions, increase the switching stress, and affect the symmetry of the circuit operation when the parasitic parameter values are different. Finally, an experimental platform rated on 200 W with 200 kHz switching frequency is established, and experimental verification is given to verify the analysis.

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Section: Introductionmentioning

confidence: 99%