MOTOR-DRIVEN AIR BLOWER

PROBLEM TO BE SOLVED: To provide a small, lightweight motor-driven air blower that improves cooling property of a winding without deteriorating air blowing efficiency. SOLUTION: This motor-driven air blower comprises a spool attached to the end surface of a field iron core fixed to a motor frame whose outside circumference is roughly cylindrical shape, and field windings wound around both of the field iron core and the spool. A gap for passing air is provided between coil ends between the slots of the field windings and the field iron core. On the spool, a wall surface is provided that is formed between the field iron core and the motor frame to narrow air blowing cross section that becomes the outside circumference of the field windings. COPYRIGHT: (C)2005,JPO&NCIPI