Engine-driven permanent magnetic type welding generator
US5796190A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | May 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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 cove…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.