Speed control device of cooling fans and method of control thereof
US6194858A · kind A · utility
28Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jul 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/934
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speed control device for a cooling fan and a method of control thereof are disclosed, in which temperature and noise among other factors are taken into consideration, whereby changes to the voltage/current of power supply provided to the cooling fan are used to adjust the speed of the cooling fan. The speed is reduced as much as possible within the permissible range of system temperature to minimize the noise generated from the cooling fan. When the temperature exceeds the permissible range, the speed of the cooling fan is accelerated to reduce system temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.