Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode

For power converters with inductive loads, a freewheeling path is needed for the current due to reactive power. The MOSFET synchronous rectification (SR) is widely used to reduce the conduction loss during the freewheeling period. Due to the wide band gap of silicon carbide (SiC), the intrinsic body...

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Main Authors: Yin, Shan, Liu, Yitao, Liu, Yong, Tseng, King Jet, Pou, Josep, Simanjorang, Rejeki
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/140064
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1400642020-05-26T06:10:33Z Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode Yin, Shan Liu, Yitao Liu, Yong Tseng, King Jet Pou, Josep Simanjorang, Rejeki School of Electrical and Electronic Engineering Rolls-Royce@NTU Corporate Lab Engineering::Electrical and electronic engineering Body Diode Efficiency For power converters with inductive loads, a freewheeling path is needed for the current due to reactive power. The MOSFET synchronous rectification (SR) is widely used to reduce the conduction loss during the freewheeling period. Due to the wide band gap of silicon carbide (SiC), the intrinsic body diode of SiC MOSFET exhibits a high voltage drop. Hence, an antiparallel SiC Schottky diode is normally implemented to eliminate its conduction. However, the external SiC Schottky diode is not fully utilized as it only works during the dead time. In this paper, the hard-switching SR is investigated in an SiC three-phase inverter and compared with a conventional inverter using freewheeling diode (FWD). An improved power loss model for the two inverters has been developed. It is found that the inverter using SR has higher efficiency due to the smaller switching loss. A 7-kW prototype of SiC three-phase inverter is built, which achieves a peak efficiency of 98.8% (±0.15%) and 98.5% (±0.15%) at 40 kHz using SR and FWD, respectively. This paper confirms that the SiC MOSFET is an ideal candidate for the SR. NRF (Natl Research Foundation, S’pore) 2020-05-26T06:10:33Z 2020-05-26T06:10:33Z 2017 Journal Article Yin, S., Liu, Y., Liu, Y., Tseng, K. J., Pou, J., & Simanjorang, R. (2018). Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode. IEEE Transactions on Industrial Electronics, 65(2), 1051-1061. doi:10.1109/TIE.2017.2733483 0278-0046 https://hdl.handle.net/10356/140064 10.1109/TIE.2017.2733483 2-s2.0-85029008671 2 65 1051 1061 en IEEE Transactions on Industrial Electronics © 2017 IEEE. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Body Diode
Efficiency
spellingShingle Engineering::Electrical and electronic engineering
Body Diode
Efficiency
Yin, Shan
Liu, Yitao
Liu, Yong
Tseng, King Jet
Pou, Josep
Simanjorang, Rejeki
Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode
description For power converters with inductive loads, a freewheeling path is needed for the current due to reactive power. The MOSFET synchronous rectification (SR) is widely used to reduce the conduction loss during the freewheeling period. Due to the wide band gap of silicon carbide (SiC), the intrinsic body diode of SiC MOSFET exhibits a high voltage drop. Hence, an antiparallel SiC Schottky diode is normally implemented to eliminate its conduction. However, the external SiC Schottky diode is not fully utilized as it only works during the dead time. In this paper, the hard-switching SR is investigated in an SiC three-phase inverter and compared with a conventional inverter using freewheeling diode (FWD). An improved power loss model for the two inverters has been developed. It is found that the inverter using SR has higher efficiency due to the smaller switching loss. A 7-kW prototype of SiC three-phase inverter is built, which achieves a peak efficiency of 98.8% (±0.15%) and 98.5% (±0.15%) at 40 kHz using SR and FWD, respectively. This paper confirms that the SiC MOSFET is an ideal candidate for the SR.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Yin, Shan
Liu, Yitao
Liu, Yong
Tseng, King Jet
Pou, Josep
Simanjorang, Rejeki
format Article
author Yin, Shan
Liu, Yitao
Liu, Yong
Tseng, King Jet
Pou, Josep
Simanjorang, Rejeki
author_sort Yin, Shan
title Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode
title_short Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode
title_full Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode
title_fullStr Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode
title_full_unstemmed Comparison of SiC voltage source inverters using synchronous rectification and freewheeling diode
title_sort comparison of sic voltage source inverters using synchronous rectification and freewheeling diode
publishDate 2020
url https://hdl.handle.net/10356/140064
_version_ 1681057292100829184