A 3kW, 500 kHz E-mode GaN HEMT based Soft-switching Totem-pole PFC

Nikhil Korada; Raja Ayyanar

doi:10.1109/WiPDA46397.2019.8998776

A 3kW, 500 kHz E-mode GaN HEMT based Soft-switching Totem-pole PFC

Nikhil Korada, Raja Ayyanar

Arizona State University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

This paper demonstrates the performance improvement of high frequency based totem-pole power factor correction circuit (PFC) using wide band gap (WBG) devices. Currently, the typical totem-pole PFC using WBG devices tend to operate at frequencies lower than 100 kHz under continuous conduction mode (CCM) and greater than 100 kHz with multi-phase interleaved versions of discontinuous conduction mode (DCM) or critical mode (CRM) converters. Soft-switching topologies employing WBG devices can drive the system at much higher rates under CCM, resulting in an efficient and compact design. A totem-pole PFC circuit with a low-loss, zero voltage transition (ZVT) auxiliary branch has been recently proposed, which provides zero voltage turn-on for the high frequency switches, with zero current switching (ZCS) for the auxiliary branch devices. However, due to resonance between the auxiliary switch capacitances and auxiliary inductor causes large over voltage stress across the auxiliary switches. This limits the use of commercially available GaN devices for this application. In this paper an improved soft-switching totem-pole PFC topology is demonstrated using enhanced-mode (e-mode) GaN HEMTs with the addition of snubber circuits. Also, rigorous studies have been conducted for different snubber configurations to alleviate the overvoltage stress and improve converter efficiency even with the presence of snubber. Comprehensive simulation and experimental results are illustrated for a 3kW, 500 kHz E-mode GaN based hardware prototype, achieving a peak efficiency of 98.68% at 2.86kW.

Original language	English (US)
Title of host publication	2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	237-244
Number of pages	8
ISBN (Electronic)	9781728137612
DOIs	https://doi.org/10.1109/WiPDA46397.2019.8998776
State	Published - Oct 2019
Event	7th Annual IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019 - Raleigh, United States Duration: Oct 29 2019 → Oct 31 2019

Publication series

Name	2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019

Conference

Conference	7th Annual IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019
Country	United States
City	Raleigh
Period	10/29/19 → 10/31/19

Keywords

CCM
CRM
DCM
E-mode GaN
HEMT
Snubber circuits
Soft-switching
Totem-pole PFC
Wide band gap devices
ZVT
Zero current switching(ZCS)
Zero voltage switching(ZVS)

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

Access to Document

10.1109/WiPDA46397.2019.8998776

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Korada, N., & Ayyanar, R. (2019). A 3kW, 500 kHz E-mode GaN HEMT based Soft-switching Totem-pole PFC. In 2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019 (pp. 237-244). [8998776] (2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WiPDA46397.2019.8998776

A 3kW, 500 kHz E-mode GaN HEMT based Soft-switching Totem-pole PFC. / Korada, Nikhil; Ayyanar, Raja.

2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 237-244 8998776 (2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Korada, N & Ayyanar, R 2019, A 3kW, 500 kHz E-mode GaN HEMT based Soft-switching Totem-pole PFC. in 2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019., 8998776, 2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019, Institute of Electrical and Electronics Engineers Inc., pp. 237-244, 7th Annual IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019, Raleigh, United States, 10/29/19. https://doi.org/10.1109/WiPDA46397.2019.8998776

Korada N, Ayyanar R. A 3kW, 500 kHz E-mode GaN HEMT based Soft-switching Totem-pole PFC. In 2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 237-244. 8998776. (2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019). https://doi.org/10.1109/WiPDA46397.2019.8998776

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abstract = "This paper demonstrates the performance improvement of high frequency based totem-pole power factor correction circuit (PFC) using wide band gap (WBG) devices. Currently, the typical totem-pole PFC using WBG devices tend to operate at frequencies lower than 100 kHz under continuous conduction mode (CCM) and greater than 100 kHz with multi-phase interleaved versions of discontinuous conduction mode (DCM) or critical mode (CRM) converters. Soft-switching topologies employing WBG devices can drive the system at much higher rates under CCM, resulting in an efficient and compact design. A totem-pole PFC circuit with a low-loss, zero voltage transition (ZVT) auxiliary branch has been recently proposed, which provides zero voltage turn-on for the high frequency switches, with zero current switching (ZCS) for the auxiliary branch devices. However, due to resonance between the auxiliary switch capacitances and auxiliary inductor causes large over voltage stress across the auxiliary switches. This limits the use of commercially available GaN devices for this application. In this paper an improved soft-switching totem-pole PFC topology is demonstrated using enhanced-mode (e-mode) GaN HEMTs with the addition of snubber circuits. Also, rigorous studies have been conducted for different snubber configurations to alleviate the overvoltage stress and improve converter efficiency even with the presence of snubber. Comprehensive simulation and experimental results are illustrated for a 3kW, 500 kHz E-mode GaN based hardware prototype, achieving a peak efficiency of 98.68% at 2.86kW.",

keywords = "CCM, CRM, DCM, E-mode GaN, HEMT, Snubber circuits, Soft-switching, Totem-pole PFC, Wide band gap devices, ZVT, Zero current switching(ZCS), Zero voltage switching(ZVS)",

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N2 - This paper demonstrates the performance improvement of high frequency based totem-pole power factor correction circuit (PFC) using wide band gap (WBG) devices. Currently, the typical totem-pole PFC using WBG devices tend to operate at frequencies lower than 100 kHz under continuous conduction mode (CCM) and greater than 100 kHz with multi-phase interleaved versions of discontinuous conduction mode (DCM) or critical mode (CRM) converters. Soft-switching topologies employing WBG devices can drive the system at much higher rates under CCM, resulting in an efficient and compact design. A totem-pole PFC circuit with a low-loss, zero voltage transition (ZVT) auxiliary branch has been recently proposed, which provides zero voltage turn-on for the high frequency switches, with zero current switching (ZCS) for the auxiliary branch devices. However, due to resonance between the auxiliary switch capacitances and auxiliary inductor causes large over voltage stress across the auxiliary switches. This limits the use of commercially available GaN devices for this application. In this paper an improved soft-switching totem-pole PFC topology is demonstrated using enhanced-mode (e-mode) GaN HEMTs with the addition of snubber circuits. Also, rigorous studies have been conducted for different snubber configurations to alleviate the overvoltage stress and improve converter efficiency even with the presence of snubber. Comprehensive simulation and experimental results are illustrated for a 3kW, 500 kHz E-mode GaN based hardware prototype, achieving a peak efficiency of 98.68% at 2.86kW.

AB - This paper demonstrates the performance improvement of high frequency based totem-pole power factor correction circuit (PFC) using wide band gap (WBG) devices. Currently, the typical totem-pole PFC using WBG devices tend to operate at frequencies lower than 100 kHz under continuous conduction mode (CCM) and greater than 100 kHz with multi-phase interleaved versions of discontinuous conduction mode (DCM) or critical mode (CRM) converters. Soft-switching topologies employing WBG devices can drive the system at much higher rates under CCM, resulting in an efficient and compact design. A totem-pole PFC circuit with a low-loss, zero voltage transition (ZVT) auxiliary branch has been recently proposed, which provides zero voltage turn-on for the high frequency switches, with zero current switching (ZCS) for the auxiliary branch devices. However, due to resonance between the auxiliary switch capacitances and auxiliary inductor causes large over voltage stress across the auxiliary switches. This limits the use of commercially available GaN devices for this application. In this paper an improved soft-switching totem-pole PFC topology is demonstrated using enhanced-mode (e-mode) GaN HEMTs with the addition of snubber circuits. Also, rigorous studies have been conducted for different snubber configurations to alleviate the overvoltage stress and improve converter efficiency even with the presence of snubber. Comprehensive simulation and experimental results are illustrated for a 3kW, 500 kHz E-mode GaN based hardware prototype, achieving a peak efficiency of 98.68% at 2.86kW.

KW - CCM

KW - CRM

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KW - Soft-switching

KW - Totem-pole PFC

KW - Wide band gap devices

KW - ZVT

KW - Zero current switching(ZCS)

KW - Zero voltage switching(ZVS)

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