EP 0584713 A1 19940302 - Method of controlling an electric motor driving a centrifugal pump.
Title (en)
Method of controlling an electric motor driving a centrifugal pump.
Title (de)
Steuerungsverfahren eines Elektromotors zum Antrieb einer Kreiselpumpe.
Title (fr)
Méthode de contrÔle d'un moteur éléctrique actionnant une pompe centrifuge.
Publication
Application
Priority
- DK 1293 A 19930106
- DK 104192 A 19920821
Abstract (en)
A method for controlling an electric motor (2) driving a centrifugal pump (3) having a diameter ratio D1/D2 less than approximately 1/2 and a varying fluid flow-through (Q), the motor (2) being connected to a supply mains (R,S,T) through a power-control device (1). An electrical measuring signal (I) is produced, being proportional to the current drawn by the motor (2) or by the power-control device (1), and based on the known characteristics of the motor (2) and the pump (3), the electrical measuring signal (I) is processed so as to produce a control signal (f), being used as an input signal to the power-control device (1). The electrical measuring signal (I) is processed in such a manner, that the control signal (f) causes the delivery pressure (H) of the pump (3) to be substantially constant over a large variation interval for the fluid flow-through (Q). <IMAGE>
IPC 1-7
IPC 8 full level
F04D 15/00 (2006.01)
CPC (source: EP)
F04D 15/0066 (2013.01)
Citation (search report)
- [X] EP 0226858 A1 19870701 - OPLAENDER WILO WERK GMBH [DE]
- [A] DE 2946049 A1 19810527 - HOECHST AG [DE]
- [A] DE 3824057 A1 19900125 - LOEWE PUMPENFABRIK GMBH [DE]
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0584713 A1 19940302; EP 0584713 B1 19970716; AT E155552 T1 19970815; DE 69312183 D1 19970821; DE 69312183 T2 19980108; DK 1293 A 19940222; DK 1293 D0 19930106
DOCDB simple family (application)
EP 93113211 A 19930818; AT 93113211 T 19930818; DE 69312183 T 19930818; DK 1293 A 19930106