Air-cooled type electric motor

An air-cooled type electric motor comprising:

• a rotor having a shaft;
• a stator encircling said rotor through an air gap;
• a pair of support members arranged at both axial ends of said stator rotatably supporting said shaft of said rotor and fixedly supporting said stator;
• plural air passages provided in a core of said stator to generally axially penetrate through said core, said air passages continuously extending in a generally axial direction through each of said core of said stator and said pair of support members;
• a separate centrifugal blower unit directly supported by one of said support members and independent of said shaft of said rotor, said blower unit forcing air surrounding the motor to flow into said air passages, a separate drive section for driving an impeller of said centrifugal blower unit, wherein said drive section comprises a drive section case, and wherein said drive section case h as a radially extending case part, said case part being directly fixed to said one of said support members closing an end of said one of said support members and covering an end of said shaft of said rotor, said centrifugal blower unit being a centrifugal fan having backward curved vanes, and wherein an exhaust direction of said centrifugal blower unit can be switched by exchanging said impeller;
• a casing attache d to said one of said support members and covering said separate centrifugal blower unit;
• and
• an external terminal supported by one of said support members and used to electrically connect the motor with outside apparatuses, an electric wire for said drive section extending through an interior space of the motor and being connected to said external terminal.