Optimal DC-Link Voltage Mapping for SiC-Based EV Drives accounting for a Synchronous Boost Converter
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| Titel: | Optimal DC-Link Voltage Mapping for SiC-Based EV Drives accounting for a Synchronous Boost Converter |
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| Autoren: | Amirpour, Sepideh, 1980, Thiringer, Torbjörn, 1966, Soltanipour, Sima, 1991, Xu, Yu, 1996 |
| Quelle: | IEEE Access. 13:38239-38254 |
| Schlagwörter: | Permanent magnet synchronous machine, Electric vehicles, DC-DC boost converter, SiC-based motor drives, Energy efficiency, Voltage-source inverters |
| Beschreibung: | This paper seeks to identify an optimal DC-link voltage across the complete range of drive operating conditions utilizing a loss minimization approach by integrating a DC-DC converter into the powertrain, thereby enhancing powertrain efficiency. This involves a comprehensive analysis of power losses in a connected silicon carbide (SiC)-based converter-inverter system, incorporating temperature variations, alongside a finite element method (FEM) analysis of losses in an Interior Permanent Magnet (IPM) synchronous machine, accounting for variable DC-link voltages. The results are then compared with those of traditional silicon-insulated-gate bipolar transistor (Si-IGBT) systems. The findings reveal that including a DC-DC converter into a powertrain, and adjusting the optimum DC-link voltages, is advantageous, particularly for low battery terminal voltages. Consequently, the powertrain system, incorporating a DC-DC boost converter, exhibits lower total loss values, with a difference of up to 5 kW loss difference for high-speed, low-torque regions compared to the case when not incorporating the DC-DC converter. Furthermore, applying the proposed optimal DC-link profile in the Worldwide harmonized Light vehicle Test Cycle (WLTC) leads to a reduction of up to 16% in accumulated energy losses in the SiC driveline compared to its IGBT counterpart. In addition, applying the optimal DC-link profile reduces energy losses by 58% in the SiC-based system and by 54% in the IGBT-based system, compared to operating with a fixed 300 V DC-bus voltage. |
| Dateibeschreibung: | electronic |
| Zugangs-URL: | https://research.chalmers.se/publication/545430 https://research.chalmers.se/publication/545430/file/545430_Fulltext.pdf |
| Datenbank: | SwePub |
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Nájsť tento článok vo Web of Science | Abstract: | This paper seeks to identify an optimal DC-link voltage across the complete range of drive operating conditions utilizing a loss minimization approach by integrating a DC-DC converter into the powertrain, thereby enhancing powertrain efficiency. This involves a comprehensive analysis of power losses in a connected silicon carbide (SiC)-based converter-inverter system, incorporating temperature variations, alongside a finite element method (FEM) analysis of losses in an Interior Permanent Magnet (IPM) synchronous machine, accounting for variable DC-link voltages. The results are then compared with those of traditional silicon-insulated-gate bipolar transistor (Si-IGBT) systems. The findings reveal that including a DC-DC converter into a powertrain, and adjusting the optimum DC-link voltages, is advantageous, particularly for low battery terminal voltages. Consequently, the powertrain system, incorporating a DC-DC boost converter, exhibits lower total loss values, with a difference of up to 5 kW loss difference for high-speed, low-torque regions compared to the case when not incorporating the DC-DC converter. Furthermore, applying the proposed optimal DC-link profile in the Worldwide harmonized Light vehicle Test Cycle (WLTC) leads to a reduction of up to 16% in accumulated energy losses in the SiC driveline compared to its IGBT counterpart. In addition, applying the optimal DC-link profile reduces energy losses by 58% in the SiC-based system and by 54% in the IGBT-based system, compared to operating with a fixed 300 V DC-bus voltage. |
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| ISSN: | 21693536 21693536 |
| DOI: | 10.1109/ACCESS.2025.3546025 |