Electric Machine Including Insulated Slot Liner With Temperature Sensor

A slot liner for insertion into a slot of a core of an electric machine including a winding arrangement having a plurality of conductors, the slot liner configured to receive at least one of the plurality of conductors, the slot liner comprising:

• a first insulation layer forming a cavity configured to receive at least one of the plurality of conductors of the winding arrangement;
• a second insulation layer coupled to the first insulation layer;
• a length of conductive material positioned between the first insulation layer and the second insulation layer, the length of conductive material having a resistance that varies with temperature, the length of conductive material including a first end and a second end;
• a first lead extending from the first end of the length of conductive material;
• and
• a second lead extending from the second end of the length of conductive material.

A method of monitoring a temperature of an electric machine with a winding arrangement in a vehicle, the method comprising:

• inserting a slot liner into a slot of a core of the electric machine, a temperature sensor provided on the slot liner such that the temperature sensor is at least partially positioned within the slot;
• inserting at least one conductor of the winding arrangement into the slot liner;
• coupling the temperature sensor to a vehicle controller;
• and
• determining a temperature inside the electric machine based on an electrical signal parameter from the temperature sensor.