EP 1387087 A3 20091028 - Method for determining the flow rate in a pump
Title (en)
Method for determining the flow rate in a pump
Title (de)
Verfahren zur Bestimmung der Durchflussmenge eines Fluids durch eine Pumpe
Title (fr)
Méthode pour déterminer le débit d'une pompe
Publication
Application
Priority
DE 10234630 A 20020729
Abstract (en)
[origin: EP1387087A2] During a pump's operation, a motor is switched off periodically by an electric/electronic drive. When switched off, it detects voltages (1-3) induced in the motor and uses the induced voltages detected by an analog-digital transformer to determine the amount of through-flow for a liquid by using a span of time for the induced voltages and by comparing this span with a reference curve. An independent claim is also included for a pump for conveying a liquid with a permanently excited synchronous motor in a micro-controller and electronic devices for controlling a motor.
IPC 8 full level
F04D 15/00 (2006.01)
CPC (source: EP)
F04D 15/0088 (2013.01)
Citation (search report)
- [Y] EP 0877463 A2 19981111 - WILO GMBH [DE]
- [Y] EP 0945973 A2 19990929 - AKO WERKE GMBH & CO [DE]
- [A] DE 3327594 A1 19850214 - ALPINE AG [DE]
- [A] GB 2077925 A 19811223 - GEN MOTORS CORP
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated extension state (EPC)
AL LT LV MK
DOCDB simple family (publication)
EP 1387087 A2 20040204; EP 1387087 A3 20091028; EP 1387087 B1 20110330; DE 10234630 A1 20040408; DE 50313576 D1 20110512
DOCDB simple family (application)
EP 03009647 A 20030430; DE 10234630 A 20020729; DE 50313576 T 20030430