A single-phase induction motor and rotor assembling apparatus

摘要

The invention relates to a single-phase induction motor comprising a main winding (2), an auxiliary winding (3) which is arranged so that an electrical angle of the auxiliary winding is different from that of the main winding, a plurality of driving capacitors (4) and (6) which are connected to the auxiliary winding, a relay (5) for controlling on/off of the driving capacitor (6) in response to the driving load, and a rotor having apertures on the gap side of the slots. The invention further relates to a rotor assembling apparatus comprising a bush (16) to which a rotor core assembly (15) is inserted for die-casting, wherein a clearance between said bush and said rotor core assembly is narrower to the extent that said rotor core assembly can be taken out after die casting; and a core band (19) having a clearance between the core band and the bush in the circumferential direction of said bush, said core band is engaged into said bush so that movement in the axis direction is restricted. The present invention can prevent a generation of the electromagnetic noise even during a high-load and high torque operation.