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<p>In this paper, a new quadratic buck-boost dc-dc converter for standalone applications is presented. In comparison with conventional buck-boost converter, CUK converter, conventional quadratic buck-boost converter, and other similar structures, this converter has a high voltage conversion ratio. The input current of this converter is continuous; therefore, the filter size on the input side is smaller than the conventional one. The continuous input current of this converter makes it appropriate for renewable energy sources. This converter has only one switch; therefore, its structure and control are simple, and only one gate driver is needed for generating the gate pulse. The output voltage of this converter is a function of the duty cycle of the power switch, and as the duty cycle changes, the output voltage of the presented converter can be varied over a wide range. Most of the converters with quadratic voltage gain commonly have at least two switches; hence the power loss of these converters is higher than the presented converter. To verify the correctness of the presented converter, a 400W experimental prototype has been built.</p>

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Single switch quadratic DC-DC buck-boost converter with continuous input current

  • 期刊论文

  • 发表日期：

    2025年7月21日

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  • Abbas Rahimi Azar,
  • Leila Mohammadian,
  • Ali Daghigh,
  • Taher Abedinzadeh

摘要

In this paper, a new quadratic buck-boost dc-dc converter for standalone applications is presented. In comparison with conventional buck-boost converter, CUK converter, conventional quadratic buck-boost converter, and other similar structures, this converter has a high voltage conversion ratio. The input current of this converter is continuous; therefore, the filter size on the input side is smaller than the conventional one. The continuous input current of this converter makes it appropriate for renewable energy sources. This converter has only one switch; therefore, its structure and control are simple, and only one gate driver is needed for generating the gate pulse. The output voltage of this converter is a function of the duty cycle of the power switch, and as the duty cycle changes, the output voltage of the presented converter can be varied over a wide range. Most of the converters with quadratic voltage gain commonly have at least two switches; hence the power loss of these converters is higher than the presented converter. To verify the correctness of the presented converter, a 400W experimental prototype has been built.