Modelo de capas para motores encapsulados de imán permanente con arranque en línea

Abstract

This paper describes the concept of ‘canned pump’ and the analysis of the canned motor. The motor is integrated directly into the pump and operates as a line-start permanent-magnet motor. It has two cans one in the stator and the other in the rotor. The rotor containment can provide a dual function: acting as the induction element to provide the line-start capability and provides a protection to the rotor against the fluid being pumped. The paper describes the development of an analytical pseudo-3D model based on the layer theory and demonstrates how the conventional approach can be modified to accommodate voltage-forced solutions and synchronous operation. The model is validated experimentally using a 10kW prototype pump motor and the model is used to examine the influence of certain design features such as the thickness of the rotor containment, the rotor magnets strength and the overhang length of the stator containment can.