Motor temperature sensor for head-mountable device

A motor assembly comprising:

• a case;
• coils at an inner surface of the case;
• terminals operably connected to the coils;
• a rotor rotatable within the case based on operation of the coils;
• a temperature sensor on an outer surface of the case, opposite one of the coils;
• and
• a flex circuit comprising:
• a first side being coupled to the outer surface of the case;
• a second side supporting the temperature sensor;
• a first end positioned at the case;
• a second end comprising a connector for providing an operable connection to a controller, wherein the terminals are connected to the flex circuit between the first end of the flex circuit and the second end of the flex circuit;
• and
• thermally conductive vias extending from the first side to the second side to conduct heat from the case to the temperature sensor.

A motor assembly comprising:

• a case containing coils and a rotor;
• terminals operably connected to the coils;
• a temperature sensor on an outer surface of the case;
• and
• a flex circuit comprising:
• a first end operably connected to the temperature sensor and positioned at the case;
• a memory comprising calibration data of the temperature sensor;
• and
• a second end comprising a connector for providing an operable connection to a controller and configured to output temperature data based on the temperature sensor and the calibration data of the memory, wherein the terminals are connected to the flex circuit between the first end of the flex circuit and the second end of the flex circuit.