The Influence of Material Hysteresis in Electromagnetic Pump Operation Analysis

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Kiyoto Matsumoto, Research & Development Department, IWAKI CO., LTD.

Abstract

An electromagnetic pump used for liquid chemical injection in the likes of water processing and boiler compounds is a reciprocating metering pump using solenoids as its driving force.
As a pulse current flows on and off repeatedly, it is important to understand electrical and magnetic characteristics within a transient state, as well as armature responsiveness when it comes to solenoid design.
This example sees a couple analysis carried out with magnetic field analysis parts expressed in JMAG, and fluid parts as load expressed in a 1D simulation with Simulink (simscape).
In magnetic field analyses, the hysteresis characteristics of a material are not often considered. In simple structures and inexpensive actuators such as electromagnetic pumps, however, high hysteresis materials such as low carbon structural steel are often used, where hysteresis exerts a considerable influence on performance.
With the objective of improving analysis accuracy, results are reported on analysis that considers hysteresis in addition to obtaining material magnetic characteristics data.
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