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This paper deals with thermal analysis coupled with the finite element analysis of electric machines. The rated torque of an electrical machine is limited by the maximum temperature rise of the materials used, in particular the insulating and permanent magnet materials. In addition, the electrical machines performance is strongly affected by the operating temperature. This paper presents a general...
A novel flameless electromagnetic heater for the army to heat up ration in field operation is presented in this paper. It uses the hysteresis and eddy current thermal power in the solid iron and the short-circuit current thermal power in the short copper bars to heat up ration. The mathematical model of the flameless heater is given based on the reverse problem of temperature rise and loss in electrical...
For high speed permanent magnet (PM) synchronous machines with a moderate over-speed limit of up to typically 150 m/s surface velocity, the buried magnet rotor concept, utilizing the steel sheet strength for fixing the magnets, is applicable. It allows the utilization of an additional reluctance torque via a negative d-current operation. A reduction of the PM volume by 50% in comparison to surface...
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