Computationally Efficient AC Resistance Model for Stator Winding With Rectangular Conductors
The resistance of the electric machine’s windings is an important parameter when analyzing the machine’s performance, as conduction losses in the winding are often the largest loss component. However, this resistance changes with frequency due to the skin and proximity effects, making it challenging to accurately estimate these losses. In this article, a computationally efficient, general method of calculating the ac resistance of an electric machine winding with rectangular conductors is presented. The method uses a 1-D magnetoquasi-static model of the stator slot region to develop boundary transfer relations between individual turns. These relations are then used to create an impedance matrix from which the ac resistance can be calculated. This technique is more flexible than previous solutions since it can accommodate different winding configurations such as fractional-pitch windings. It is shown that a fractional-pitch winding has a lower ac resistance than a full-pitch winding. Finally, finite-element analysis simulations and experimental results are used to validate the proposed method.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- Automotive Research Center (ARC); US Army CCDC Ground Vehicle Systems Center (GVSC); USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1615219
- Journal Information:
- IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4 Vol. 56; ISSN 0018-9464
- Publisher:
- Institute of Electrical and Electronics Engineers. Magnetics GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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