Modeling of a Switchable Permanent Magnet Magnetic Flux Actuator

I. Dirba, and J. Kleperis
Institute of Solid State Physics of University of Latvia
Riga, Latvia
Publié en 2011

A simple magnetic circuit consisting of ferromagnetic core material, air gap, permanent magnets and current coils can be used to form magnetic actuators, motors etc. devices. In this work the current coils are not used to generate working magnetic field, but just to switch magnetic flux created by permanent magnets in necessary direction.

Analytical and numerical (Finite Element Model, COMSOL) models are set up and solved; an experimental model of switchable magnetic flux linear actuator is constructed and tested. Studies on selecting the optimal magnetic materials for minimizing core saturation effects as well as choice of permanent magnet grade and electric current value in flux switching coils for switchable magnetic flux electrical machine are made. Obtained experimental results are compared with outputs from analytical and numerical models. Conclusions are made and further research steps are outlined.

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