Data storage system having cooling fan speed protection
US7621460B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | May 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/206
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speed control system is provided for controlling temperature within a chassis. The chassis includes therein a temperature sensing device for producing a temperature signal representative of temperature within the chassis, a fan, and a fan speed controller. The fan speed controller produces a nominal fan speed control signal comprising a train of pulses, successive pulses having a duty cycle related to the temperature signal produced by the temperature sensing device, such time durations decreasing with increasing temperature. The speed control system includes a decoupling circuit responsive to the nominal fan speed control signal for, in response to relatively a low duty cycle, coupling the nominal fan control signal to an output of the decoupling circuit, and, in response a relatively high duty cycle, producing a preset fan speed signal at the output of the decoupling circuit. The fan has a speed in accordance with the signal at the output of the decoupling circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.