Affiliations: [a] Jiangsu Province Laboratory of Mining Electric and Automation, China University of Mining and Technology, Xuzhou, 221116, P.R. China | [b] School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, 221116, P.R. China | [c] School of Information and Control Engineering, China University of Mining and Technology, Xuzhou, 221116, P.R. China
Correspondence:
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Corresponding author: Xuesong Wang, School of Information and Control Engineering, China University of Mining and Technology, Xuzhou, 221116, P.R. China. E-mail: [email protected]
Abstract: This paper introduces an optimal control model strategy to minimize system loss and meantime to maintain low torque ripple for a can-shielded switched reluctance machine (SRM). The system loss consists of semiconductor loss from power converter, as well as loss from the machine which not only includes traditional iron and copper losses, but also the characteristic ohmic can loss and friction loss due to the use of can shields. In particular, the can loss is calculated by Poynting’s theorem of magnetic energy conversion using a model of concentric layer structure. Loss of semiconductors considers temperature rise effect by an electro-thermal coupling approach. The effectiveness is verified on a 3-phase 20 kW 12/8 canned SRM.
Keywords: Switched reluctance machine, can shields, can loss, torque sharing function
