Resistively Graded Insulation System for Next-Generation Converter-Fed Motors
- General Electric, Global Research Center, Niskayuna, NY (United States)
The objective of this project was to demonstrate the feasibility of a new insulation material system capable of withstanding 10 kV/μs switching voltage ramp rate (dV/dt) with operating frequencies and temperatures targeted at converter-fed motors. If successful, with additional development, this insulation material can enable 5%-10% electric machine energy savings from advanced silicon carbide (SiC) drive implementation. To accomplish these goals, we propose to eliminate partial discharge as a degradation mechanism in high voltage, taped insulation. This can be accomplished through the use of a two-sided coating on a polymer film system that will envelop any residual defects on all sides, effectively creating a Faraday cage around the defect. This project focused on demonstrating the proof of concept for the coating. It was shown that concept of providing a stress grading coating around voids can prevent partial discharge. Simulation and lab scale experiments showed that the design can be implemented in a practical layered structure without causing overheating of the insulation due to conduction. Short term testing and calculations show there is a reasonable likelihood to improved insulation life. A path to full scale production was demonstrated, with gaps in process optimization identified as needing to be closed for full scale implementation. Longer term testing and integration onto a conductor is required to fully quantify life and show benefits at an application level.
- Research Organization:
- General Electric, Global Research Center, Niskayuna, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
- DOE Contract Number:
- EE0007873
- OSTI ID:
- 1483295
- Report Number(s):
- DOE-GEGRC-0007873
- Country of Publication:
- United States
- Language:
- English
Similar Records
High power rechargeable thermal battery. Final report, 1 September 1996-31 July 1997
Grid-Connected Modular Soft-Switching Solid State Transformers (M-S4T)