Abstract
This paper develops a magnetic equivalent circuit model suitable to the design and optimization of the synchronous ac homopolar machine. The ac homopolar machine is of particular interest in the application of grid-based flywheel energy storage, where it has the potential to significantly reduce self-discharge associated with magnetic losses. The ac homopolar machine features both axial and radial magnetizing flux paths, which requires finite element analysis to be conducted in 3-D. The computation time associated with 3-D finite element modeling is highly prohibitive in the design process. The magnetic equivalent circuit model developed in this paper is shown to be a viable alternative for calculating several design performance parameters and has a computation time which is orders of magnitude less than that of 3-D finite element analysis. Results obtained from the developed model are shown to be in good agreement with finite element and experimental results for varying levels of saturation.
Original language | English (US) |
---|---|
Article number | 7134770 |
Pages (from-to) | 1670-1678 |
Number of pages | 9 |
Journal | IEEE Transactions on Energy Conversion |
Volume | 30 |
Issue number | 4 |
DOIs | |
State | Published - Dec 2015 |
Bibliographical note
Publisher Copyright:© 2015 IEEE.
Keywords
- Energy storage
- finite element analysis
- flywheels
- magnetic equivalent circuit (MEC)
- renewable generation