Patent ID: 8304939

Claim:
An electric water pump apparatus comprising: a stator generating a magnetic field according to a control signal; and a rotor enclosed by the stator and rotated by the magnetic field generated at the stator to pressurize coolant, wherein the stator comprises: a stator core formed by stacking a plurality of pieces made of a magnetic material; an insulator connecting pieces of the stator core to each other; a coil provided on the stator core so as to form a magnetic path; a Hall sensor detecting a position of the rotor; a Hall sensor board electrically coupled to the Hall sensor and controlling the control signal supplied to the stator according to the position of the rotor detected by the Hall sensor; and a stator case wrapping and sealing the stator core, the insulator, the coil, the Hall sensor, and the Hall sensor board together, wherein the Hall sensor and the Hall sensor board are coupled to the insulator in a state of being inserted in and assembled to an insert, and wherein the insulator is provided with an insert recess and the insert assembled with the Hall sensor and the Hall sensor board is inserted in and supported by the insert recess.