Abstract: A commercial electric drive unit includes an electric motor module and a planetary gearbox module. The electric motor module and the planetary gearbox module are disposed longitudinally in line with each other. The electric motor module and the planetary gearbox module are configured to share one or more lubrication and cooling fluids and a single pump may provide such fluid to both modules. Torque generated by the electric motor is output to the planetary gearbox for multiplication. The planetary gearbox is configured to couple to a prop shaft for output of torque that has been multiplied by the planetary gearbox.

Abstract: Described herein are electric motors with stators comprising multiple sets of fluidic pathways, e.g., a plurality of fluid-passage slots, a plurality of first-fluid-recirculating slots, and a plurality of second-fluid-recirculating slots. The plurality of fluid-passage slots extends through the stator parallel to the primary axis between the coil-interconnection side and the bus-bar side and circumferentially offset from each other. The cooling fluid can pass through the stator using these slots. The plurality of first-fluid-recirculating slots and the plurality of second-fluid-recirculating slots extend to and open only at one of the coil-interconnection side or the bus-bar side. Furthermore, each of the plurality of first-fluid-recirculating slots is fluidically coupled to one of the plurality of second-fluid-recirculating slots. As such, the cooling fluid enters and leaves these recirculating slots from the same side of the stator.

Abstract: Described herein are fractional-slot-winding motors and electric vehicles using such fractional-slot-winding motors. In some examples, a fractional-slot-winding motor comprises a stator, a bus-bar assembly, and a plurality of coil units. The stator comprises a plurality of stator slots (e.g., 63 slots) extending through the core and radially offset relative to each other. Each dual-leg coil unit extends through two different stator slots and is electrically coupled to two other coil units on the coil-interconnection side of the rotor. Each single-leg coil unit extends through one coil slot and is electrically coupled to one other coil unit on the coil-interconnection side. At least some single-leg coil units can be coupled to a bus-bar assembly. Furthermore, the ends of the coil unit can have radial offsets relative to protruding portions, e.g., closer to the motor primary axis at the coil-interconnection side and further away on the opposite side.

Abstract: Described herein are methods and systems of a drive unit of an electric commercial vehicle. The drive unit may include an electric motor, a transmission, and a differential. The electric motor, transmission, and differential may share lubrication and cooling fluids. Various features for collecting and distribution the lubrication and cooling fluids are also described herein.

Abstract: Described herein are methods and systems of a drive unit of an electric commercial vehicle. The drive unit may include an electric motor, a transmission, and a differential. The electric motor, transmission, and differential may share lubrication and cooling fluids. Various features for collecting and distribution the lubrication and cooling fluids are also described herein.

Abstract: Described herein are fractional-slot-winding motors and electric vehicles using such fractional-slot-winding motors. In some examples, a fractional-slot-winding motor comprises a stator, a bus-bar assembly, and a plurality of coil units. The stator comprises a plurality of stator slots (e.g., 63 slots) extending through the core and radially offset relative to each other. Each dual-leg coil unit extends through two different stator slots and is electrically coupled to two other coil units on the coil-interconnection side of the rotor. Each single-leg coil unit extends through one coil slot and is electrically coupled to one other coil unit on the coil-interconnection side. At least some single-leg coil units can be coupled to a bus-bar assembly. Furthermore, the ends of the coil unit can have radial offsets relative to protruding portions, e.g., closer to the motor primary axis at the coil-interconnection side and further away on the opposite side.

Abstract: Described herein are fractional-slot-winding motors and electric vehicles using such fractional-slot-winding motors. In some examples, a fractional-slot-winding motor comprises a stator, a bus-bar assembly, and a plurality of coil units. The stator comprises a plurality of stator slots (e.g., 63 slots) extending through the core and radially offset relative to each other. Each dual-leg coil unit extends through two different stator slots and is electrically coupled to two other coil units on the coil-interconnection side of the rotor. Each single-leg coil unit extends through one coil slot and is electrically coupled to one other coil unit on the coil-interconnection side. At least some single-leg coil units can be coupled to a bus-bar assembly. Furthermore, the ends of the coil unit can have radial offsets relative to protruding portions, e.g., closer to the motor primary axis at the coil-interconnection side and further away on the opposite side.

Abstract: Described herein are methods and systems of a drive unit of an electric commercial vehicle. The drive unit may include an electric motor, a transmission, and a differential. The electric motor, transmission, and differential may share lubrication and cooling fluids. Various features for collecting and distribution the lubrication and cooling fluids are also described herein.

Abstract: Described herein are fractional-slot-winding motors and electric vehicles using such fractional-slot-winding motors. In some examples, a fractional-slot-winding motor comprises a stator, a bus-bar assembly, and a plurality of coil units. The stator comprises a plurality of stator slots (e.g., 63 slots) extending through the core and radially offset relative to each other. Each dual-leg coil unit extends through two different stator slots and is electrically coupled to two other coil units on the coil-interconnection side of the rotor. Each single-leg coil unit extends through one coil slot and is electrically coupled to one other coil unit on the coil-interconnection side. At least some single-leg coil units can be coupled to a bus-bar assembly. Furthermore, the ends of the coil unit can have radial offsets relative to protruding portions, e.g., closer to the motor primary axis at the coil-interconnection side and further away on the opposite side.