Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1992-10-27
1994-02-01
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 57, H02K 928
Patent
active
052834930
ABSTRACT:
A brush cooling system for a direct current electric motor of the type having a housing with an air inlet at one end for admitting forced cooling air to the motor and brushes located at an end of the motor distal from the air inlet, includes at least one air duct extending from the air inlet end of the motor through a space defined by adjacent stator windings of the motor and terminating at about an end of the windings opposite the air inlet end. A convergent nozzle is releasably connected to the terminating end of the air duct and extends from the air duct to an area generally adjacent the motor brushes for directing cooling air from the duct onto the brushes. Field coils of the stator windings are separated by air spaces and the air ducts extend through the air spaces between field coils. Each air space not including an air duct is substantially blocked by a baffle inserted in the space for inhibiting air flow through the air space. An air deflector is connected to the housing adjacent the distal end of the motor windings with an end of the air duct extending through the air deflector for connection to the nozzle. A bracket couples the nozzle to the air deflector for supporting the nozzle in the motor.
REFERENCES:
patent: 3486055 (1969-12-01), Lipstein
patent: 3673447 (1972-06-01), Zumbach et al.
patent: 3731121 (1973-05-01), Cook et al.
patent: 3784855 (1974-01-01), Motegi et al.
patent: 4092556 (1978-05-01), Mabuchi
patent: 4626720 (1986-12-01), Fukasaku et al.
Hokanson Paul R.
Veith George C.
General Electric Company
Nguyen Matthew
Payne R. Thomas
Skudy R.
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