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Multi-domain analytical rotor model with buried permanent magnets in V-arrangement for high-speed applications

Lauerburg Maximilian, Toraktrakul Polkrit, Hameyer Kay

Archives of Electrical Engineering

2023

Vol. 72, nr 3

629--641

Different buried permanent magnet arrangements in rotors are compared based on electrical machines found in literature regarding high-speed capability. An analytical approach is presented to analytically calculate mechanical stresses in the bilateral and central bridge of V arrangements in order to determine the achievable circumferential velocity of a rotor geometry. The mechanical model is coupled to an analytical model which can determine the flux density in the main air gap under consideration of flux leakage within the rotor. The multi-domain model enables the analytical design of high-speed rotors with buried permanent magnets in V-arrangement.