Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1996-05-29
1998-08-18
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310216, 310254, 310261, 310156, 310 61, 310112, 310271, H02K 2122, H02K 104, H02K 122
Patent
active
057961905
ABSTRACT:
Disclosed is an engine-driven welding generator using a plurality of neodymium-iron-boron based rare earth magnets and provided with countermeasures for suppressing a rise in temperature of the magnets. The engine-driven welding generator driven by an engine (200) to generate both a dc welding power output and an auxiliary ac power output comprises: a stator (110) including a laminated-structure armature core (111) and an armature winding (112) wound around the armature core (111); a rotor (120) supported by the engine in cantilever fashion and including a laminated-structure field core (121), a plurality of magnet plates (122) containing neodymium-iron-boron based rare earth as the major component and arranged on an outer circumferential surface of the laminated-structure field core with a smallest possible gap between the two adjacent magnet plates, a plurality of centrifugal fan blades (123) arranged in the vicinity of the outer circumference of and on both side surfaces of the field core, and a plurality of axial air passages (121a) formed on an inner side of the field core; and an enclosure including a housing (101) fixed to the engine for supporting the stator, and a top cover (103) for introducing cooling air from one side surface of the rotor remote from the engine through the fan-shaped air passages formed in the rotor core in cooperation with the housing.
REFERENCES:
patent: 2689394 (1954-12-01), Brown
patent: 4286187 (1981-08-01), Binder
patent: 4642502 (1987-02-01), Carpenter et al.
patent: 4797602 (1989-01-01), West
Mizuno Yasumasa
Takeda Masanobu
Tetsui Shunichi
Yamamoto Hirotaka
Denyo Kabushiki Kaisha
Dougherty Thomas M.
Tamai K.
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