METHOD FOR MAKING INTEGRATED STATOR, BRUSHLESS DIRECT CURRENT MOTOR OF RADIAL CORE TYPE HAVING A STRUCTURE OF DOUBLE ROTORS AND METHOD FOR MAKING THE SAME USING THE METHOD

摘要

A method for making an integrated stator, a brushless direct current motor of radial core type having a structure of double rotors and a method for making the same using the method are provided to efficiently cool a heat generated from a rotor and a stator by inducing a flow of the cooling air by a magnetic gap. a brushless direct current motor(100) of radial core type having a structure of double rotors, an axis of rotation(9) is mounted on a housing(10) of a device. An integrated double rotor(500) includes inner/outer rotors, wherein a plurality of N poles and S poles are arranged alternately on concentric circles, different each other, and magnets, facing each other with a certain gap between inside and outside, are arranged to have an opposite pole respectively, and a rotor support body, which integrates the inner and outer rotors except for magnet surfaces and is molded with a thermosetting resin to be connected with an external circumference of bushing, where a terminal unit, formed to be extended from the inner rotor to a central part, is coupled with the axis of rotation(9) with forming a trench type space between the inner and outer rotors. One end of an integrated stator(330) is arranged on the trench type space and is fixed to the housing(10) of the device in an extension portion extended from the other end thereof in an axis direction, wherein divided core groups of U, V, and W phase coil assemblies are arranged alternately in a round shape under a state of winding a coil on each divided core(30) consecutively for being connected with having a short jump line between divided cores(30) of the divided core groups and a long jump line between the divided core groups with respect to each of U, V, and W phase coil assemblies comprising a plurality of core groups including a plurality of separated divided cores(30).