Axial flow fan motor
US5925948A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10689
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To reduce the number of parts composing a control circuit and to reduce an area occupied by a printed circuit board on which the parts are to be mounted, in an axial flow fan motor in which a shaft is rotatably mounted by bearings and an impeller is mounted on the shaft, the control circuit is in the form of an arcuate shape having an area corresponding to 30% to 60% of an total area of the boss portion and is installed into a printed circuit board having a diameter smaller than that of the boss portion. Also, by utilizing the functions installed into the integrated circuit of the control circuit, the parts provided on the circuit board may be dispensed with. As a result, a space which corresponds to that of the printed circuit board is generated in an interior of a casing to thereby enhance the cooling performance and to reduce the number of the parts and the manufacture steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.