Patent ID: 8747082
Filing Date: 2014-06-10
Classification: F01P,F04D,H02K

Abstract:
1. An electric water pump comprising: a stator generating a magnetic field according to a control signal; a rotor enclosed by the stator and rotated by the magnetic field generated at the stator; a pump cover having an inlet through which coolant flows in and an outlet through which pressurized coolant flows out; a body having: a shaft having a central axis, fixed to the rotor so as to rotate together with the rotor about the central axis, and mounted in the rotor chamber; and an impeller fixed to a front portion of the shaft so as to rotate together with the shaft, pressurizing the coolant having flowed in through the inlet, and mounted in the volute chamber, wherein the rotor chamber is fluidly connected to the volute chamber, and the stator chamber is fluidly closed and sealed from the rotor chamber; wherein the stator comprises: wherein the stator case is insert-molded with a bulk mold compound including a potassium family that has a low coefficient of contraction; and wherein the rotor comprises: