| Summary: | In the medical and chemical fields, in order to avoid the corrosion of cores and windings, it is necessary to introduce two thin cylindrical corrosion-resistant cans and end support structures into high-speed motors. The result is that there are many kinds of losses and the internal electromagnetic distribution is complex. The loss formation mechanisms and each sort of current path are challenging to master. In order to solve this problem, a 1.5MW high-speed canned induction motor is calculated using the 3D finite element method. The superposition method is used to separate the circulating current losses and eddy current losses at the end of the motor. The mechanism and circulating current path of the circulating current losses between the structural components are analyzed. The influence of material properties of end structures on circulating current losses and path is discussed. A new circulating current losses suppression method is proposed, and the beneficial effect of the optimized structure is verified using the temperature field. This study provides a solution for the safe and reliable operation of high-speed canned induction motors.
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