公开(公告)号：US20170241413A1

公开(公告)日：2017-08-24

申请号：US15503258

申请日：2015-08-04

申请人： Thomas Magnete GmbH ,  TECHNISCHE UNIVERSITAT DRESDEN

发明人： Axel MÜLLER ,  Thomas KRAMER ,  Martin PETZOLD ,  Jürgen WEBER ,  Olaf OHLIGSCHLAGER

IPC分类号： F04B49/06 ,  H01F7/18 ,  F04B51/00 ,  H01F7/08 ,  F04B19/22 ,  F04B17/04

摘要： A controller of an electromagnetically driven reciprocating pump influences velocity of the magnetic armature by switching voltage applied to the electromagnet depending on the position of the magnetic armature, its position determined from state variables of the electromagnet. A processor calculates electrical resistance of the magnetic coil from the voltage and current measured by the measuring device, and calculates the temporal change of the linked magnetic flux in the electromagnet from the electrical voltage, the current and the resistance of the magnetic coil, and calculates the linked magnetic flux in the electromagnet from an earlier magnetic flux and from the temporal change, and determines the position of the magnetic armature from the linked magnetic flux in the electromagnet and the electrical current through the magnetic coil, and switches the voltage at the magnetic coil by the switching device depending on the position of the magnetic armature.