Loss analysis and soft-switching characteristics of gan based DC/DC converter for tow-stage microinverter

Yajing Zhang, T. Q. Zheng, Yan Li

Research output: Contribution to journalArticle

Abstract

Two-stage micro-inverter topology requires high boost converter to generate stable DC bus voltage for the inverter. The GaN FET based high gain DC/DC circuit can achieve high efficiency, high step-up ratio, which will reduce the volume and enhance the efficiency of transformer. GaN FET has the characteristics of low parasitic parameters, no reverse recovery losses, high speed, which will reduce the switching losses of the device. Soft switching characteristics of the flyback-forward high gain DC/DC converter can be further reduced the stress of GaN FET. Therefore the switching losses of GaN FET will be reduced, and the efficiency of the converter will be improved. The power loss analysis of GaN FET based flyback-forward high gain DC/DC converter is discussed in detail. A 200 W GaN FET based flyback-forward high gain DC/DC converter is established. Theoretical analysis and experiment results verified that the topology is applicable for high efficiency micro-inverter.

Original languageEnglish (US)
Pages (from-to)32-39
Number of pages8
JournalTaiyangneng Xuebao/Acta Energiae Solaris Sinica
Volume37
Issue number1
StatePublished - Jan 28 2016

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DC-DC converters
Field effect transistors
converters
direct current
field effect transistors
high gain
Topology
topology
Soft switching (power electronics)
power loss
acceleration (physics)
Recovery
transformers
Networks (circuits)
Electric potential
recovery
high speed
Experiments
electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

Cite this

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abstract = "Two-stage micro-inverter topology requires high boost converter to generate stable DC bus voltage for the inverter. The GaN FET based high gain DC/DC circuit can achieve high efficiency, high step-up ratio, which will reduce the volume and enhance the efficiency of transformer. GaN FET has the characteristics of low parasitic parameters, no reverse recovery losses, high speed, which will reduce the switching losses of the device. Soft switching characteristics of the flyback-forward high gain DC/DC converter can be further reduced the stress of GaN FET. Therefore the switching losses of GaN FET will be reduced, and the efficiency of the converter will be improved. The power loss analysis of GaN FET based flyback-forward high gain DC/DC converter is discussed in detail. A 200 W GaN FET based flyback-forward high gain DC/DC converter is established. Theoretical analysis and experiment results verified that the topology is applicable for high efficiency micro-inverter.",
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Loss analysis and soft-switching characteristics of gan based DC/DC converter for tow-stage microinverter. / Zhang, Yajing; Zheng, T. Q.; Li, Yan.

In: Taiyangneng Xuebao/Acta Energiae Solaris Sinica, Vol. 37, No. 1, 28.01.2016, p. 32-39.

Research output: Contribution to journalArticle

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AB - Two-stage micro-inverter topology requires high boost converter to generate stable DC bus voltage for the inverter. The GaN FET based high gain DC/DC circuit can achieve high efficiency, high step-up ratio, which will reduce the volume and enhance the efficiency of transformer. GaN FET has the characteristics of low parasitic parameters, no reverse recovery losses, high speed, which will reduce the switching losses of the device. Soft switching characteristics of the flyback-forward high gain DC/DC converter can be further reduced the stress of GaN FET. Therefore the switching losses of GaN FET will be reduced, and the efficiency of the converter will be improved. The power loss analysis of GaN FET based flyback-forward high gain DC/DC converter is discussed in detail. A 200 W GaN FET based flyback-forward high gain DC/DC converter is established. Theoretical analysis and experiment results verified that the topology is applicable for high efficiency micro-inverter.

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