Electric machine including a dielectric layer arranged between a stator and a housing

An electric machine, the electric machine comprising:

• a rotor, a stator, a housing, a bearing system, and an insulator system;
• wherein the stator and the bearing system are arranged within the housing;
• wherein the rotor is rotatably arranged within the stator employing the bearing system;
• wherein the stator includes a stator core and a plurality of field windings;
• wherein the insulator system is interposed between the stator core and the housing;
• wherein the stator has a plurality of mounting bosses;
• wherein the stator is secured to the housing via a plurality of fasteners that are arranged in the plurality of mounting bosses and coupled to the housing;
• wherein the insulator system includes a plurality of dielectric fastener encapsulators;
• wherein the stator is secured to the housing via the plurality of fasteners;
• and
• wherein the plurality of fasteners secure the stator to the housing with the plurality of dielectric fastener encapsulators interposed therebetween.

A method for assembling a permanent magnet electric machine, the method comprising:

• interposing a dielectric insulator system between a stator core and a housing of the permanent magnet electric machine prior to inserting the stator core into the housing;
• interposing a dielectric sleeve between the housing and the stator core;
• inserting the stator core into the housing, including interposing a dielectric sleeve between the stator core and the housing;
• interposing a dielectric spacer between the stator core and the housing
• assembling a plurality of dielectric fastener encapsulators into the housing;
• securing the stator core onto the housing employing a plurality of fasteners, wherein the plurality of dielectric fastener encapsulators are interposed between the plurality of fasteners and the housing;
• and then
• removing the dielectric sleeve from between the rotor and the stator core.