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A Novel Cost-Effective Two-Level Inverter with Combined Use of Thyristors and IGBTs

  • Chen, Dezhi (School of Electrical Engineering, Shenyang University of Technology) ;
  • Zhao, Wenliang (School of Electrical Engineering, Shandong University) ;
  • Kwon, Byung-il (Department of Electronic Systems Engineering, Hanyang University)
  • Received : 2016.08.26
  • Accepted : 2017.08.14
  • Published : 2018.01.01

Abstract

In this paper, a novel topology of two-level voltage-type inverter is proposed. The proposed inverter has three bridge arms while each bridge is made up of two thyristors, one IGBT and four diodes. Thyristors complete the phase positioning of the inverter, IGBT completes the modulation of different modulation modes such as SPWM, SVPWM, and SHPWM, and the diodes complete the commutation of the bridge arms. Compared to the traditional voltage-type inverter with six IGBTs, the proposed voltage-type inverter using three IGBTs can achieve the same function with highly reduced cost. The principle of the proposed two-level inverter is explained in detail. The simulation and experiment results demonstrate the performance and effectiveness of the proposed inverter-type inverter.

Keywords

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Fig. 1. Topology of the traditional two-level inverter

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Fig. 2. Topology of the proposed two-level inverter

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Fig. 3. Energy transfer model of new-type two levelinverter

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Fig. 4. Switch time series of novel two-level inverter

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Fig. 5. The principle diagram of the asymmetry rulesampling method

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Fig. 6. Signal of SPWM

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Fig. 7. Waveform of drive for thyristor and IGBT

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Fig. 8. Voltage of thyristor and IGBT

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Fig. 9. Output voltage of inverter

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Fig. 10. Output current of inverter

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Fig. 11. Experiment system

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Fig. 12. DSP output waveform of phase A

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Fig. 13. DSP output waveform of phase B

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Fig. 14. DSP output waveform of phase C

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Fig. 15. DSP output waveform of three phase IGBT

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Fig. 16. DSP output waveform of three phase up bridgearm thyristor

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Fig. 17. Thyristor drive output waveform of three phasebridge arm

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Fig. 18. Output voltage of three phase

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Fig. 19. Output line voltage of three phase

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Fig. 20. Output current of inverter

Table 1. Electric devices and cost estimation

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Table 2. Switch state of novel two-level inverter

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Table 3. Basic parameter of new-type two level inverter

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