Electric motor with an air-cooling system
First Claim
1. An electric motor with an air-cooling system, comprising:
- a rotor;
a stator having a stator core encircling said rotor with a gap being defined therebetween;
a plurality of air passages formed directly in said stator core and extending generally axially along an outer periphery of the stator core;
a covering member fixed to said stator and at least partially covering an outer peripheral surface of said stator core so as to define a cavity at least partially encircling said stator core in fluidic communication with said air passages; and
a blower unit disposed at one end of the motor to allow for blowing ambient air, surrounding said motor, into said cavity, whereby the air flows from said cavity into said air passages to absorb heat generated in said stator and then is discharged from said air passages out of the motor.
1 Assignment
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Accused Products
Abstract
An electric motor includes a covering member for covering the outer periphery of a stator core, to improve the cooling efficiency of an air-cooling system of the motor. The covering member is fixed to a stator while defining a cavity therebetween in fluidic communication with air passages formed directly in the stator core. When an blower unit mounted on the motor operates, an ambient air surrounding the motor is introduced into the cavity, and then flows from the cavity into the air passages, so as to actively absorb heat generated in the stator from the outer peripheral surface of the stator core and the tubular wall surfaces of the air passages. Thereafter, the air is discharged from the air passages out of the motor.
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Citations
5 Claims
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1. An electric motor with an air-cooling system, comprising:
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a rotor; a stator having a stator core encircling said rotor with a gap being defined therebetween; a plurality of air passages formed directly in said stator core and extending generally axially along an outer periphery of the stator core; a covering member fixed to said stator and at least partially covering an outer peripheral surface of said stator core so as to define a cavity at least partially encircling said stator core in fluidic communication with said air passages; and a blower unit disposed at one end of the motor to allow for blowing ambient air, surrounding said motor, into said cavity, whereby the air flows from said cavity into said air passages to absorb heat generated in said stator and then is discharged from said air passages out of the motor. - View Dependent Claims (2, 3, 4, 5)
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Specification