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Controller Design of Buck-Boost Converter with Constant Voltage Output

정 전압 출력을 갖는 벅-부스트 컨버터의 제어기 설계

Lee, Woo-Cheol
이우철

  • Received : 2015.06.25
  • Accepted : 2015.07.22
  • Published : 2015.09.30

Abstract

The Buck-Boost converter consisted of two switches is more expensive than the conventional Buck converter, because of the increase of the components. However, it can control the DC voltage depending on the requested load voltage without additional circuits, because it can control the voltage under the relatively wide range of the load. Additionally, it can control the output voltage constantly under the variation of the input voltage. In the paper two control loops consisted of current and voltage control are designed. When two controllers are operated at the same time the problem of the output voltage is occurred. Therefore, the solution of the output voltage problem is proposed. Finally, the validity of the proposed scheme is investigated with simulated and experimental results for a prototype system rated at 1kVA.

Keywords

Buck-Boost Converter;Voltage/Current Control Loop;Transfer Algorithm;Transient State

References

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Acknowledgement

Supported by : 한국연구재단