An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter
This paper proposes an improved discontinuous pulse-width modulation (DPWM) method based on phase-shifted PWM (PS-PWM) for three-phase cascaded H-bridge (CHB) multilevel inverters. Due to the CHB multilevel inverters employ a large number of power semiconductor switches, they suffer from device fail...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9220869/ |
| _version_ | 1818936247375101952 |
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| author | Seok-Min Kim Eui-Jae Lee June-Seok Lee Kyo-Beum Lee |
| author_facet | Seok-Min Kim Eui-Jae Lee June-Seok Lee Kyo-Beum Lee |
| author_sort | Seok-Min Kim |
| collection | DOAJ |
| description | This paper proposes an improved discontinuous pulse-width modulation (DPWM) method based on phase-shifted PWM (PS-PWM) for three-phase cascaded H-bridge (CHB) multilevel inverters. Due to the CHB multilevel inverters employ a large number of power semiconductor switches, they suffer from device failures because the switches are one of the major failure factors in a power electronic system. Therefore, the reliability and life-time of CHB multilevel inverters are mainly determined by the reliability of switches. The most failure of switches is occurred by its accumulated thermal stress which is generated by power losses including the conduction and switching loss. By applying the conventional DPWM, the life-time of switches can be extended because it reduces the switching loss. The conventional DPWM, however, still operates with high speed carrier frequency and it is not enough to reduce the switching loss of the CHB multilevel inverter with a large number of inverter cells. The proposed novel DPWM method provides the improved switching loss reduction through the different switching behaviors for each leg. Additionally, the rotation scheme promises even power distribution and life-time management among inverter cells in a CHB multilevel inverter. The simulation results and experimental results confirm the switching loss reduction and even power distribution abilities of the proposed modulation method. |
| first_indexed | 2024-12-20T05:33:02Z |
| format | Article |
| id | doaj.art-21866c81569543dd9feae919698e0492 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-20T05:33:02Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-21866c81569543dd9feae919698e04922022-12-21T19:51:41ZengIEEEIEEE Access2169-35362020-01-01818707218708310.1109/ACCESS.2020.30302619220869An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel InverterSeok-Min Kim0https://orcid.org/0000-0002-5104-3444Eui-Jae Lee1https://orcid.org/0000-0002-2515-6963June-Seok Lee2https://orcid.org/0000-0002-9374-7140Kyo-Beum Lee3https://orcid.org/0000-0002-2125-9500Department of Electrical and Computer Engineering, Ajou University, Suwon, South KoreaDepartment of Electrical and Computer Engineering, Ajou University, Suwon, South KoreaSchool of Electronics and Electrical Engineering, Dankook University, Yongin, South KoreaDepartment of Electrical and Computer Engineering, Ajou University, Suwon, South KoreaThis paper proposes an improved discontinuous pulse-width modulation (DPWM) method based on phase-shifted PWM (PS-PWM) for three-phase cascaded H-bridge (CHB) multilevel inverters. Due to the CHB multilevel inverters employ a large number of power semiconductor switches, they suffer from device failures because the switches are one of the major failure factors in a power electronic system. Therefore, the reliability and life-time of CHB multilevel inverters are mainly determined by the reliability of switches. The most failure of switches is occurred by its accumulated thermal stress which is generated by power losses including the conduction and switching loss. By applying the conventional DPWM, the life-time of switches can be extended because it reduces the switching loss. The conventional DPWM, however, still operates with high speed carrier frequency and it is not enough to reduce the switching loss of the CHB multilevel inverter with a large number of inverter cells. The proposed novel DPWM method provides the improved switching loss reduction through the different switching behaviors for each leg. Additionally, the rotation scheme promises even power distribution and life-time management among inverter cells in a CHB multilevel inverter. The simulation results and experimental results confirm the switching loss reduction and even power distribution abilities of the proposed modulation method.https://ieeexplore.ieee.org/document/9220869/Discontinuous pulse-width modulationpower lossespower distributioncascaded H-bridge multilevel inverterreliability of power conversion system |
| spellingShingle | Seok-Min Kim Eui-Jae Lee June-Seok Lee Kyo-Beum Lee An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter IEEE Access Discontinuous pulse-width modulation power losses power distribution cascaded H-bridge multilevel inverter reliability of power conversion system |
| title | An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter |
| title_full | An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter |
| title_fullStr | An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter |
| title_full_unstemmed | An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter |
| title_short | An Improved Phase-Shifted DPWM Method for Reducing Switching Loss and Thermal Balancing in Cascaded H-Bridge Multilevel Inverter |
| title_sort | improved phase shifted dpwm method for reducing switching loss and thermal balancing in cascaded h bridge multilevel inverter |
| topic | Discontinuous pulse-width modulation power losses power distribution cascaded H-bridge multilevel inverter reliability of power conversion system |
| url | https://ieeexplore.ieee.org/document/9220869/ |
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