Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters
The cascaded H-bridge (CHB) is an attractive converter topology because it can provide voltage and power scalability. However, due to the difference in electrical and thermal characteristics of power devices, the CHB can be composed of cells with unequal remaining useful lifetime (RUL). In this pape...
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/11027099/ |
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| author | Anas Ibrahim Mohamed Salem Tomonobu Senjyu Soichiro Ueda Dahaman Ishak Mahmood Swadi |
| author_facet | Anas Ibrahim Mohamed Salem Tomonobu Senjyu Soichiro Ueda Dahaman Ishak Mahmood Swadi |
| author_sort | Anas Ibrahim |
| collection | DOAJ |
| description | The cascaded H-bridge (CHB) is an attractive converter topology because it can provide voltage and power scalability. However, due to the difference in electrical and thermal characteristics of power devices, the CHB can be composed of cells with unequal remaining useful lifetime (RUL). In this paper, a PWM strategy is proposed to manage the lifetime of individual cells within a single-phase CHB by controlling the thermal stress of power devices. The proposed PWM has two variants of modulation signals. The discontinuous modulation (DM) which reduces the thermal stress of a cell and the compensating modulation (CM) for removing the offset voltage introduced by DM. Based on the accumulated damages of cells, the modulation signals are actively updated to achieve equalized RUL. The benefit of the proposed PWM is that the power transmission of cells is not affected by the clamping region of the DM. This is achieved by introducing a factor C during the unclamped region which reduce the fundamental voltage by the same amount the clamping region causes it to increase. The experimental result verifies the impact of the proposed PWM on the power transmission of cells. Furthermore, a long-term study is provided in simulation to validate the lifetime equalization of cells. |
| format | Article |
| id | doaj-art-0b775eb7808346e8ad1a61ba8a5debd2 |
| institution | OA Journals |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
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| spelling | doaj-art-0b775eb7808346e8ad1a61ba8a5debd22025-08-20T02:32:49ZengIEEEIEEE Access2169-35362025-01-0113995099952310.1109/ACCESS.2025.357716311027099Lifetime-Based Discontinuous PWM for Cascaded H-Bridge ConvertersAnas Ibrahim0https://orcid.org/0000-0003-1225-2013Mohamed Salem1https://orcid.org/0000-0003-2290-998XTomonobu Senjyu2https://orcid.org/0000-0003-4494-6773Soichiro Ueda3https://orcid.org/0000-0002-8734-162XDahaman Ishak4https://orcid.org/0000-0001-9363-6339Mahmood Swadi5https://orcid.org/0009-0007-5011-5358School of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, MalaysiaSchool of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, MalaysiaFaculty of Engineering, University of the Ryukyus, Nakagami, Nishihara, JapanFaculty of Engineering, University of the Ryukyus, Nakagami, Nishihara, JapanElectrical Engineering Department, Prince Mohammad Bin Fahd University, Al Khobar, Saudi ArabiaDepartment of Electrical Engineering, College of Engineering, University of Baghdad, Baghdad, IraqThe cascaded H-bridge (CHB) is an attractive converter topology because it can provide voltage and power scalability. However, due to the difference in electrical and thermal characteristics of power devices, the CHB can be composed of cells with unequal remaining useful lifetime (RUL). In this paper, a PWM strategy is proposed to manage the lifetime of individual cells within a single-phase CHB by controlling the thermal stress of power devices. The proposed PWM has two variants of modulation signals. The discontinuous modulation (DM) which reduces the thermal stress of a cell and the compensating modulation (CM) for removing the offset voltage introduced by DM. Based on the accumulated damages of cells, the modulation signals are actively updated to achieve equalized RUL. The benefit of the proposed PWM is that the power transmission of cells is not affected by the clamping region of the DM. This is achieved by introducing a factor C during the unclamped region which reduce the fundamental voltage by the same amount the clamping region causes it to increase. The experimental result verifies the impact of the proposed PWM on the power transmission of cells. Furthermore, a long-term study is provided in simulation to validate the lifetime equalization of cells.https://ieeexplore.ieee.org/document/11027099/CHB converterthermal stress reductionlifetime extensiondiscontinuous modulationsemiconductor device lifetime |
| spellingShingle | Anas Ibrahim Mohamed Salem Tomonobu Senjyu Soichiro Ueda Dahaman Ishak Mahmood Swadi Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters IEEE Access CHB converter thermal stress reduction lifetime extension discontinuous modulation semiconductor device lifetime |
| title | Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters |
| title_full | Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters |
| title_fullStr | Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters |
| title_full_unstemmed | Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters |
| title_short | Lifetime-Based Discontinuous PWM for Cascaded H-Bridge Converters |
| title_sort | lifetime based discontinuous pwm for cascaded h bridge converters |
| topic | CHB converter thermal stress reduction lifetime extension discontinuous modulation semiconductor device lifetime |
| url | https://ieeexplore.ieee.org/document/11027099/ |
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