Insulation Integrity for Power Dense, Medium Voltage, Electric Machinery
Abstract
The University of Texas team, led by Dr. Aleta Wilder, will investigate predictive modeling of Insulation Integrity in power-dense, medium voltage machine environments where cyclic stresses imposed on the insulation do not cause voids to form and enlarge. The proposed effort will quantify the effects of multiplexed cyclic stresses on the insulation material by developing a physical model that represents dielectric aging of idealized insulation for three dielectric classes. The model will then be demonstrated by establishing the integrity limits of a composite insulation system. The proposed model is needed to effectively manage the stress environment as machine designs become more power-dense. The combined effects of heating, cyclic mechanical loads, and transient electrical stresses on the insulation integrity are difficult to quantify in highly nonlinear materials that age. Particular attention will be given to higher frequency stress modulation (for example, stress resulting from magnetic pole excitations in rotating machinery). The basic science model using a simplified geometry will provide useful materials information, not only for machine design but also to guide insulation material improvements and condition-based maintenance.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512496
Entities
People
- Aleta T. Wilder
Organizations
- Office of Naval Research
- United States Navy
- University of Texas at Austin