Stator having bus bar structure, propeller driving motor using same, and method for manufacturing stator

A stator having a bus bar structure, the stator comprising:

• a split type state core in which a plurality of split cores, each tooth extending in a center direction from a back yoke part forming a magnetic circuit, are annularly assembled;
• an upper insulator and a lower insulator which are combined to surround an outer peripheral surface of the teeth of the split cores from above and below;
• a three-phase driving type stator coil which is wound around an outer circumference of each of the upper insulator and the lower insulator and includes a plurality of core groups which are continuously wound around three teeth adjacent for each phase, wherein the core groups on each phase are connected in parallel and are alternately arranged for each phase;
• a plurality of bus bar brackets coupled to one of the upper insulator and the lower insulator so as to bind two adjacent split cores, respectively, and each having four guide channels;
• U-phase, W-phase, and V-phase bus bars, each inserted and fixed to one of the four guide channels, in which a plurality of connection terminals to which start terminals of each core group are connected, protrude at intervals;
• a common electrode bus bar inserted into one of the four guide channels to be fixed, in which a plurality of connection terminals to which end terminals of each core group are connected, protrude at intervals;
• and
• a stator support which surrounds the stator coil wound on the insulators so as to integrate the plurality of split cores, and insulates between adjacent coils,
• wherein the plurality of bus bar brackets are positioned to bind a front end insulator coupled to a rear end split core of a front core group among adjacent core groups and a rear end insulator coupled to a front end split core of a rear end core group, and
• wherein each of the bus bar brackets has first and second coupling holes coupled to coupling protrusions of the insulators, respectively, a first coupling protrusion of the front insulator and a second coupling protrusion of the rear insulator are coupled to the first and second coupling holes, respectively, and an insulator not coupled to the bus bar bracket is arranged before and after the front insulator and the rear insulator coupled to the bus bar bracket.