Patent ID: 8502425
Filing Date: 2013-08-06
Classification: H02K

Abstract:
1. A totally enclosed motor, comprising: a rotor disposed inside a housing, and configured to transfer heat of the rotor to the housing, wherein the rotor has a shape different between one end side and the other end side, in an extending direction of a rotary shaft of the rotor; a stator disposed inside the housing, and configured to transfer heat of the stator to the housing; and an inner fin disposed in the rotor, and configured to agitate air inside the housing, wherein the inner fin has a height in the axis direction of the rotary shaft that is smaller than a height of a coil at the stator in the axis direction of the rotary shaft; wherein the totally enclosed motor is cooled by a forced convection by an outer fan disposed outside the housing, or by a natural convention in the vicinity of an outer surface of the housing; wherein at least two wind holes, other than a gap between the rotor and the stator, passing through between the both end sides in the extending direction of the rotary shaft of the rotor are disposed in at least one of: the rotor, the stator, the rotary shaft, or the housing; and wherein a wind hole is formed to be inclined from the extending direction of the rotary shaft on an outer surface of the rotor or within the rotor.