ELECTRIC MOTOR, CONTROLLER THEREFOR AND METHODS FOR CONTROLLING AND ASSEMBLING SAME

摘要

PCT No. PCT/US92/03907 Sec. 371 Date Jul. 6, 1992 Sec. 102(e) Date Jul. 6, 1992 PCT Filed May 11, 1992.A miniature electric motor is provided including stator and rotor assemblies wherein the rotor assembly has a magnet and a shaft adapted to be coupled to a load to move the load and wherein the magnet is positioned about the stator assembly for rotating without the stator assembly. The stator assembly includes a stator having a plurality of branches made of a magnetic material angularly positioned with respect to each other and a plurality of coils wound about their respective branches. The shaft extends through the stator and also, preferably, through a brake which supplies pressure to the rotor assembly to thereby supply a braking force to the rotor assembly after the load has been rotated to a desired position.