Patent ID: 9543811
Date: 2017-01-10
CPC Classifications: H02K

Claim:
1. An electric motor assembly comprising: a housing; an electric motor supported in a motor compartment of the housing; an encoder operatively coupled to the electric motor and supported in an encoder compartment of the housing; a thermal insulator between the motor compartment and the encoder compartment for thermally isolating the motor compartment from the encoder compartment, and a heat sink supported in the encoder compartment and surrounding at least a portion of the encoder, the heat sink in thermal contact with an end cap of the housing at least partially defining the encoder compartment, whereby the heat sink is adapted to absorb heat from the encoder and conduct heat to the end cap; wherein the heat sink is annular and includes a cylindrical central cavity extending between axial end faces of the heat sink, the encoder at least partially received in the central cavity.