Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 66, Issue 7, Pages 5057-5069Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2018.2868288
Keywords
Electrical machines; end-windings; lumped parameter thermal network; thermal management
Categories
Funding
- INNOVATIVE Doctoral Program
- Marie Curie Initial Training Networks action [665468]
- Institute for Aerospace Technology, University of Nottingham
- University of Nottingham Propulsion Futures Beacon
- Marie Curie Actions (MSCA) [665468] Funding Source: Marie Curie Actions (MSCA)
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In an electrical machine design, thermal management plays a key role in improving the performance and reducing size. End-windings are commonly identified as the machine hot-spot. Hence, lowering and predicting end-windings temperature are crucial tasks in thermal management of electrical machines. This paper proposes and investigates a noninvasive but effective cooling method that aims for a uniform cooling of a machine's winding by implementing direct cooling on its end-windings. Modeling and experimental results show that a 25% hot-spot temperature reduction on a particular application can be achieved. To analyze the proposed technique in detail, an accurate but computationally economic lumped parameter thermal network is developed. Comparison between a standard thermal network and its simplified equivalent (with less nodes) is presented where the models are developed and fine-tuned based on experimental data. All the above is used to investigate the potential of the proposed end-winding cooling method with different configurations of the methodology.
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