Terminal connector assembly in overmolded single unit with coil end windings, temperature sensors, and cooling channel
A vehicle electric machine assembly including a stator core and a terminal block is provided. The stator core includes one or more three-phase terminals connected to end windings. The terminal block includes a connector for each of the three-phase terminals. A portion of the end windings extending from the stator core, the three-phase terminals, and the terminal block are overmolded as a single unit such that a portion of each of the connectors is exposed for connection to an inverter. The terminal block may further include one or more threaded apertures, each sized to receive a threaded stud to facilitate an electrical connection between one of the one or more three-phase terminals and the inverter. Each of the one or more three-phase terminals may extend axially along an axis substantially parallel to a central axis of a rotor disposed within a cavity defined by the stator core.
1. A vehicle electric machine assembly comprising:
a stator core including one or more three-phase terminals connected to end windings and extending radially away from the end windings along an axis substantially perpendicular to a central rotating axis of a rotor disposed within a cavity defined by the stator core;
a terminal block including a connector for each of the one or more three-phase terminals, wherein a portion of the end windings extending from the stator core, the one or more three-phase terminals, and the terminal block are overmolded as a single unit such that a portion of each of the connectors is exposed for connection to an inverter, wherein the overmolded single unit completely defines a coolant channel radially spaced away from the end windings such that the overmolded single unit is directly between and separates the end windings and the coolant channel to prevent coolant in the coolant channel from contacting the end windings, and heat from the end windings conducts through the overmolded single unit to the coolant; a controller; and one or more temperature sensors disposed within the overmolded single unit to measure thermal conditions of the end windings and having sensor connectors extending out of the overmolded single unit connected to the controller, wherein the one or more temperature sensors is positioned axially above the coolant channel and below the one or more three-phase terminals, and wherein the controller is programmed to adjust a flow of the coolant responsive to a temperature detection by the one or more temperature sensors of an end winding temperature outside of a predetermined threshold.