A stator assembly for an electric motor assembly is provided. The stator assembly includes an annular body extending about a central axis. The annular body includes an inner surface and an outer surface. The annular body has a first thickness defined between the inner surface and the outer surface. The stator assembly also includes at least one stator tooth extending radially from the annular body. The at least one stator tooth includes a first tip spaced radially from the annular body. The at least one stator tooth has a second thickness. A ratio of the first thickness to the second thickness is at least about 1.1.

The present disclosure relates to a method for motor thermal overload protection, including: obtaining a motor thermal limit curve; selecting a first and a second overload factor calculation point on the curve, and calculating the first and second overload factors based on a preset heating time constant; calculating a modified overload factor based on the first and second overload factors; selecting at least two time constant calculation points on the motor thermal limit curve, and calculating a modified heating time constant for each time constant calculation point based on the modified overload factor; obtaining a modified heating time function for each motor operating point based on the modified heating time constant for each time constant calculation point; calculating a stator heat level at each motor operating point based on the modified overload factor and heating time function; comparing the stator heat level with the first and second predetermined thresholds.

A stator assembly for an electric motor assembly is provided. The stator assembly includes an annular body extending about a central axis. The annular body includes an inner surface and an outer surface. The annular body has a first thickness defined between the inner surface and the outer surface. The stator assembly also includes at least one stator tooth extending radially from the annular body. The at least one stator tooth includes a first tip spaced radially from the annular body. The at least one stator tooth has a second thickness. A ratio of the first thickness to the second thickness is at least about 1.1.

A stator assembly for an electric motor assembly is provided. The stator assembly includes an annular body extending about a central axis. The annular body includes an inner surface and an outer surface. The annular body has a first thickness defined between the inner surface and the outer surface. The stator assembly also includes at least one stator tooth extending radially from the annular body. The at least one stator tooth includes a first tip spaced radially from the annular body. The at least one stator tooth has a second thickness. A ratio of the first thickness to the second thickness is at least about 1.1.

A stator assembly including a circumferential stator core with a plurality of stator poles; a plurality of stator slots located between a pair of adjacent stator poles; a plurality of conductive coils surrounding a portion of each stator pole, and a coolant wall assembly. The coolant wall assembly may extend between a pair of adjacent stator poles at a radially inner end of each stator pole, and include a unitary, radially inner wall spanning between, and secured to, the pair of adjacent stator poles on opposing sides of an individual stator slot; a radially outer insert located adjacent the radially inner wall and between the pair of adjacent stator poles; and at least one sealing member positioned radially between the radially outer insert and the plurality of conductive coils.

A rotor for a current-excited synchronous machine, includes a rotor main body which has a plurality of rotor teeth distributed around the circumference and rotor slots formed therebetween, the rotor teeth being wound, along the rotor slots and on the front side, with conductor material in order to form a winding, the conductor material being surrounded by a potting compound, thereby forming a potting body for mechanical stabilization, the potting body having segments on the front sides in extension of the rotor slots, and in at least one of the segments the material cohesion of the potting compound is selectively weakened or eliminated at least in regions or portions.

A slot closure element for a rotor of an electric machine of a motor vehicle for closing a slot of a rotor body of the rotor includes a closure body for arrangement in the slot. The closure body includes contact pressure regions that press against an inner side of a radially outer slot boundary of the slot, and two axially projecting projections on axially opposite end faces of the closure body, each having a chamfer, wherein the chamfers seal the slots and are configured to convert an axial force exerted on the projections into a radial force acting on the closure body to radially press the contact pressure regions against the inner side of the radially outer slot boundary.

A slot closure element for a rotor of an electric machine of a motor vehicle for closing a slot of a rotor body of the rotor includes a closure body for arrangement in the slot. The closure body includes contact pressure regions that press against an inner side of a radially outer slot boundary of the slot, and two axially projecting projections on axially opposite end faces of the closure body, each having a chamfer, wherein the chamfers seal the slots and are configured to convert an axial force exerted on the projections into a radial force acting on the closure body to radially press the contact pressure regions against the inner side of the radially outer slot boundary.