EP 1451914 A1 20040901 - METHOD FOR DETECTING A DEFECTIVE COOLING FAN AND FOR GENERATING AN ALARM SIGNAL
Title (en)
METHOD FOR DETECTING A DEFECTIVE COOLING FAN AND FOR GENERATING AN ALARM SIGNAL
Title (de)
VERFAHREN ZUR ERKENNUNG EINES DEFEKTEN LÜFTERS UND ZUR ERZEUGUNG EINES ALARMSIGNALS
Title (fr)
PROCEDE PERMETTANT DE DETECTER LA DEFAILLANCE D'UNE SOUFFLANTE ET DE PRODUIRE UN SIGNAL D'ALARME
Publication
Application
Priority
- DE 10160564 A 20011210
- EP 0213771 W 20021205
Abstract (en)
[origin: WO03055030A1] The invention relates to a method for generating an alarm signal in a motor which comprises a rotor (50) whose effective operating speed is in a standard zone (nSoll, TSoll) and can deviate from said standard zone if defective, and is to be monitored for such a defective state. At least one alarm trigger speed (nAOn, TAOn) and at least one alarm switch-off speed (nAOff, TAOff) are determined, the latter being closer to the standard zone than the first. A hysteresis zone is defined between an associated pair of alarm trigger speed and alarm switch-off speed. If the speed to be monitored, starting from the hysteresis zone, approaches the alarm trigger speed, an alarm trigger criterion (Flag_DIR=0) is generated (Fig. 13: S178). The duration of said alarm trigger criterion is monitored (Fig. 13: S184, 192). When the duration reaches a predetermined value (tdOn), an alarm signal (ALARM) is activated (Fig. 13: S186, 194). The invention also relates to a corresponding motor.
IPC 1-7
IPC 8 full level
F04D 27/02 (2006.01); H02H 7/093 (2006.01)
CPC (source: EP US)
F04D 27/008 (2013.01 - EP US); H02H 7/093 (2013.01 - EP US)
Citation (search report)
See references of WO 03055030A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03055030 A1 20030703; WO 03055030 A8 20031030; AU 2002360961 A1 20030709; DE 10256658 A1 20030703; EP 1451914 A1 20040901; US 2004246138 A1 20041209; US 7075446 B2 20060711
DOCDB simple family (application)
EP 0213771 W 20021205; AU 2002360961 A 20021205; DE 10256658 A 20021202; EP 02795101 A 20021205; US 48939904 A 20040311