An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions
The DC-link capacitors in an electronic power system are the main constraint of the power density and lifespan of the power converters. Evaluating the load life of capacitors working in severely adverse circumstances plays an important role in the design stages of the next-generation power converter...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/19/6937 |
| _version_ | 1797479666556076032 |
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| author | Yi-Hung Liao Yen-Lun Lin |
| author_facet | Yi-Hung Liao Yen-Lun Lin |
| author_sort | Yi-Hung Liao |
| collection | DOAJ |
| description | The DC-link capacitors in an electronic power system are the main constraint of the power density and lifespan of the power converters. Evaluating the load life of capacitors working in severely adverse circumstances plays an important role in the design stages of the next-generation power converters. In this article, an improved evaluation system for the capacitors utilized in high-power three-phase voltage source inverters is proposed. The purpose of this article is to reproduce the same encountered stresses when a DC-link capacitor is used in a high-power inverter with pulse-width modulation. Hence, an improved down-scale evaluation system for the DC-link capacitors used in high-power three-phase inverter systems under balanced and unbalanced load conditions is proposed. Moreover, AC and DC analyses in the proposed evaluation system are conducted. The equivalent circuit and transfer functions are derived to verify the proposed evaluation system. Finally, a prototype system is constructed to facilitate the theoretical results as the verification. |
| first_indexed | 2024-03-09T21:49:06Z |
| format | Article |
| id | doaj.art-9898e673d8fc40b98256d1f9b42de3cb |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T21:49:06Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-9898e673d8fc40b98256d1f9b42de3cb2023-11-23T20:10:23ZengMDPI AGEnergies1996-10732022-09-011519693710.3390/en15196937An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load ConditionsYi-Hung Liao0Yen-Lun Lin1Department of Electrical Engineering, National Central University, Taoyuan City 320, TaiwanDepartment of Electrical Engineering, National Central University, Taoyuan City 320, TaiwanThe DC-link capacitors in an electronic power system are the main constraint of the power density and lifespan of the power converters. Evaluating the load life of capacitors working in severely adverse circumstances plays an important role in the design stages of the next-generation power converters. In this article, an improved evaluation system for the capacitors utilized in high-power three-phase voltage source inverters is proposed. The purpose of this article is to reproduce the same encountered stresses when a DC-link capacitor is used in a high-power inverter with pulse-width modulation. Hence, an improved down-scale evaluation system for the DC-link capacitors used in high-power three-phase inverter systems under balanced and unbalanced load conditions is proposed. Moreover, AC and DC analyses in the proposed evaluation system are conducted. The equivalent circuit and transfer functions are derived to verify the proposed evaluation system. Finally, a prototype system is constructed to facilitate the theoretical results as the verification.https://www.mdpi.com/1996-1073/15/19/6937DC-link capacitorsthree-phase invertersdown-scale evaluation systemunbalanced load conditionlife of capacitors |
| spellingShingle | Yi-Hung Liao Yen-Lun Lin An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions Energies DC-link capacitors three-phase inverters down-scale evaluation system unbalanced load condition life of capacitors |
| title | An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions |
| title_full | An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions |
| title_fullStr | An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions |
| title_full_unstemmed | An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions |
| title_short | An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions |
| title_sort | improved down scale evaluation system for capacitors utilized in high power three phase inverters under balanced and unbalanced load conditions |
| topic | DC-link capacitors three-phase inverters down-scale evaluation system unbalanced load condition life of capacitors |
| url | https://www.mdpi.com/1996-1073/15/19/6937 |
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