The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1999
Filed:
Jun. 01, 1998
Masanobu Takeda, Kawagoe, JP;
Yasumasa Mizuno, Kawagoe, JP;
Shunichi Tetsui, Kawagoe, JP;
Hirotaka Yamamoto, Kawagoe, JP;
Denyo Kabushiki Kaisha, Tokyo, JP;
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.