Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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The 500W DC/DC converter development for thermoelectric application

열전소자 활용을 위한 500W급 DC/DC 컨버터 개발

  • Received : 2018.12.03
  • Accepted : 2019.03.12
  • Published : 2019.03.31
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Abstract

This paper describes the development of a 500W DC/DC converter for use with a thermoelectric module(TEM). A thermoelectric device is a structure in which a P-type semiconductor and an N-type semiconductor are electrically connected in series and thermally connected in parallel. There is a feature that an electromotive force is generated by making a temperature difference between both surfaces of a thermoelectric element. This feature can be used as a renewable power source without the need for fossil energy. The proposed converter boosts the low generation voltage of the thermoelectric element to secure the voltage for the grid connection. This converter is a combination of a resonant converter for boosting and a boost-converter for output voltage control. This structure has an advantage that a voltage can be stepped up at a high efficiency and precise output voltage control is possible. We carry out simulations and experiments to verify the validity.

Keywords

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Fig. 1 Typical configuration of TEM

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Fig. 2 The V-I Curve for a connection configuration of TEM[4]

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Fig. 3 The output power for a connection configuration of TEM[6]

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Fig. 4 The proposed circuit configuration

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Fig. 6 The operation of resonant converter : Sp2-ON

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Fig. 5 The operation of resonant converter : Sp1-ON

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Fig. 7 The operation of boost converter : Qdw-ON

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Fig. 8 The operation of boost converter :Qdw-OFF

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Fig. 9 The simulation circuit

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Fig. 10 The simulation result 1

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Fig. 11 The simulation result 2

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Fig. 12 The control board and power stack

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Fig. 13 Experimental result 1

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Fig. 14 Experimental result 2

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Fig. 15 Experimental result 3

References

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