Patent ID: 8152485

Claim:
A DC brushless motor pump, comprising: a body provided with a housing and a cover sealing one side of the housing, a chamber being formed between the housing and the cover; a cylinder provided extending outwards from the chamber of the housing that defines an opening; a rotor surrounding the cylinder and comprising a rotating shaft and an annular magnetic member surrounding an outer circumference of the rotating shaft; a stator unit mounted in the chamber and including a plurality of silicon steel laminations and a plurality of coils continuously surrounding the steel laminations comprising a basal portion, in which a pair of arms are provided extending upwardly from two sides of the basal portion that is formed with a free end at two sides of the cylinder, in which a pair of arc-shaped grooves are formed corresponding to the top ends of the arms and the cylinder is provided between the arc-shaped grooves; a fan blade member axially provided at a front end of the rotating shaft, in which the rotor is inserted into the cylinder through the opening such that the fan blade member is positioned outside the opening; a front cover sealing the opening of the cylinder, defining a hollow, and covering the fan blade member, the fan blade member thus being exactly arranged in the center of the hollow, and a water intake tube and a water outlet tube being provided around the outer circumference of the front cover; and a control unit comprising an excitation circuit connected to the stator unit, a signal controller connected to the excitation circuit, and a magnetic induction module connected to the signal controller, in which the excitation circuit may excite the stator unit and generate pulse signals of different frequencies to drive the rotor to run and further the magnetic induction module senses the N and S poles of the rotor and meanwhile generates a signal feedback to the signal controller.