Heat dissipation system and method for stablizing the heat dissipation system
US9907205B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2017 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Jul 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/20136
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat dissipation system at lease has a first fan module including a first fan and a first fan driving circuit. The first fan driving circuit generates a fan driving signal to drive the first fan. When a control module transmits a stopping signal to the first fan module, the first fan driving circuit decreases a duty cycle of the fan driving signal driving the first fan according to the stopping signal. When the duty cycle of the fan driving signal driving the first fan is less than or equal to a first predetermined duty cycle, within a first working time, the first fan driving circuit decreases the duty cycle of the fan driving signal driving the first fan to zero by subtracting one predetermined duty interval from the duty cycle of the fan driving signal driving the first fan every predetermined working time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.