Electric machine with stator retention system

A method for manufacture of an electric machine system, comprising:

• mating an assembly formed between a multi-phase stator and a rotor with a housing;
• and
• securing the assembly within the housing using a stator retaining device;
• wherein the stator retaining device includes:
• a wedge ring positioned between an outer diameter of a stator lamination stack and an inner diameter of the housing;
• a cylindrical nut coupled to an axial end of the stator lamination stack and the housing, wherein the threaded nut and exerts an axial clamp load on the stator lamination stack;
• or
• a cover and one or more shims and/or springs that are positioned axially between the cover and the stator lamination stack, wherein the cover is coupled to the housing.

A traction motor system, comprising:

• a multi-phase stator circumferentially surrounding a rotor;
• a housing at least partially enclosing the multi-phase stator;
• and
• a stator retaining device configured to secure the multi-phase stator within the housing;
• wherein the stator retaining device includes:
• a wedge ring positioned between an outer diameter of a stator lamination stack and an inner diameter of the housing;
• a cylindrical nut coupled to an axial end of the stator lamination stack and the housing, wherein the threaded nut and exerts an axial clamp load on the stator lamination stack;
• or
• a cover and one or more shims and/or springs that are positioned axially between the cover and the stator lamination stack, wherein the cover is coupled to the housing.