Stator assembly including stiffener and method of assembly thereof

An electric motor assembly comprising:

• a rotor assembly comprising:
• a middle portion;
• and
• a plurality of spokes having magnets that form poles of said rotor assembly,
• wherein said rotor assembly has ten poles;
• a stator assembly comprising:
• an annular body extending about a central axis, wherein said annular body includes an inner surface and an outer surface, said annular body having an outer diameter defined by said outer surface, and a first thickness defined between said inner surface and said outer surface, wherein a ratio of said first thickness to said outer diameter of said annular body is at least 0.065;
• a plurality of stator teeth coupled to said annular body and extending radially from said annular body and defining twelve stator slots therebetween, each stator tooth of said plurality of stator teeth including two circumferentially opposing tips a first tip spaced radially from said annular body, and side surfaces defining a tooth thickness therebetween, wherein a ratio of said first thickness to said tooth thickness is in a range of 1.1 to 1.5;
• a plurality of conduction coils, each conduction coil of said plurality of conduction coils is coupled to one stator tooth of said plurality of stator teeth, wherein said plurality of conduction coils includes one conduction coil for each stator tooth of said plurality of stator teeth;
• a plurality of stiffeners positioned circumferentially between and coupled to one of the two tips for each of a pair of adjacent stator teeth of said plurality of stator teeth, each of said plurality of stiffeners positioned radial distance from said annular body and said plurality of conduction coils,
• wherein each of said plurality of stiffeners is positioned between every other pair of stator teeth of said plurality of stator teeth;
• and
• a housing enclosing the stator assembly and the rotor assembly, the housing including a shell and an end shield, wherein the end shield is a circular plate and extends continuously across an end of the shell, and wherein the shell and the end shield are solid and free of any openings.