Investigation into the Thermal Behavior and Loadability Characteristic of a YASA-AFPM Generator via an Improved 3-D Coupled Electromagnetic-Thermal Approach

Saadat Jamali Arand; Amir Akbari; Mohammad Ardebili

doi:10.46604/ijeti.2021.6221

Authors

Saadat Jamali Arand Electrical Engineering Department, Faculty of Engineering, Yasouj University, Yasouj, Iran
Amir Akbari Department of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran, Iran
Mohammad Ardebili Department of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran, Iran

DOI:

https://doi.org/10.46604/ijeti.2021.6221

Keywords:

permanent-magnet machines, finite element method, thermal analysis, loadability

Abstract

The objective of this paper is to investigate the thermal behaviour and loadability characteristic of a yokeless and segmented armature axial-flux permanent-magnet (YASA-AFPM) generator, which uses an improved 3-D coupled electromagnetic-thermal approach. Firstly, a 1-kW YASA-AFPM generator is modelled and analysed by using the proposed approach; the transient and steady-state temperatures of different parts of the generator are determined. To improve the modelling accuracy, the information is exchanged between the thermal and electromagnetic models at each step of the co-simulation, considering both the accurate calculation of losses and the impacts of temperature rise on the temperature-dependent characteristics of the materials. Then, by using the proposed approach, the impact of the slot opening width and the turn number of stator segments on the generator loadability are investigated. After that, the experimental tests are performed. The results reveal the effectiveness and accuracy of the approach to predict the machine loadability and thermal behavior.

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