Patent · US Expired

Method and circuit arrangement for controlling fans

US5731671A · kind A · utility

8Cited by

17References

3Claims

0Family size

Assignee

Siemens Nixdorf Informationssyteme Aktiengesellschaft · DE

Inventors

Jurgen Adam · Burgau, DE
Peter Busch

Key dates

Filing date	Mar 18, 1997
Grant date	Mar 24, 1998
Priority date	—
Expiry date	Mar 18, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S388/934
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In order to control fans, which are arranged for example in power supplies for cooling the components arranged there, a method and a circuit arrangement are proposed which, on the basis of control pulses which are derived from the input current of the fan, effect the control in such a way that the control pulses are re-shaped into monostable pulses and are fed, via an asymmetrical resistance circuit for charging and discharging, to a storage component whose charge state is a measure for the control of the fan.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.