Impact of Unipolar Repetitive Square Wave Voltage Rise Time and Frequency on (RPDIV-PDIV) and (PDIV-PDEV)

Naderiallaf, H.; Giangrande, P.; Galea, M.

Abstract

Shorter rise times, faster switching frequencies, and higher DC link voltages are all features of high dV/dt power converters that promote power density and loss reduction . A higher dV/dt increases the risk of partial discharge (PD) between the turn-to-turn insulation, especially in the first turns of the machine winding, where a higher voltage can drop because of the reflections (the surge impedance of the machine is higher than that of the feeding cable which connects it to the converter). PD activity can cause electrical machines to go out of operation by prematurely failing the winding insulation, especially for Type I turn-to-turn insulations (i.e., organic insulating materials), reducing reliability .

Citation

Naderiallaf, H., Giangrande, P., & Galea, M. (2023, April). Impact of Unipolar Repetitive Square Wave Voltage Rise Time and Frequency on (RPDIV-PDIV) and (PDIV-PDEV). Presented at 2023 INSUCON - 14th International Electrical Insulation Conference (INSUCON), Birmingham, UK

• Presentation Conference Type: Edited Proceedings
• Conference Name: 2023 INSUCON - 14th International Electrical Insulation Conference (INSUCON)
• Start Date: Apr 18, 2023
• End Date: Apr 20, 2023
• Acceptance Date: Apr 18, 2023
• Online Publication Date: Jun 14, 2023
• Publication Date: Apr 14, 2023
• Deposit Date: Jan 12, 2025
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Pages: 236-240
• Book Title: INSUCON 2023 - Proceedings of the 14th INSUCON International Electrical Insulation Conference
• ISBN: 979-8-3503-3460-9
• Public URL: https://nottingham-repository.worktribe.com/output/44223571
• Publisher URL: https://ieeexplore.ieee.org/document/10148128