Patent ID: 8368283

Claim:
A stator for a brushless direct-current (BLDC) motor, the stator comprising: a number of stator core assemblies, each stator core assembly including a division type stator core respectively receiving a bobbin thereon, the bobbin having inner and outer flanges, the inner and outer flanges respectively having first and second coupling protrusions extending therefrom and spaced one from the other in a direction of an axis of the division type stator core, the stator core assembly including a coil wound around the bobbin; and a printed circuit board (PCB) for an assembly where each stator core assembly is automatically position-set and then assembled and two end portions of each coil are mutually connected to respective phases of a three phase circuit arrangement, wherein the assembly PCB comprises: a central area formed in an annular contour, and having a number of conduction lines printed on a lower surface to connect the coil of each stator core assembly to a corresponding phase; and a number of coupling areas each extending radially from an opposing inner and outer side of the central area, each coupling area being smaller in area than an area of a lower end of a corresponding one of the stator core assemblies each coupling area having first and second coupling grooves formed therein and receiving the first and second coupling protrusions of the bobbin of the corresponding one of the stator core assemblies, wherein the PCB is integrally formed with stator core assemblies by a thermosetting resin, and wherein the coupling areas being smaller in area than the lower ends of the corresponding stator core assemblies maximizes a contact area of the thermosetting resin between the PCB and the stator core assemblies.