From this main advantage another advantages follow:

• no electrical isolation problems at high temperatures,

• simpler construction,

• smaller overall dimensions and weight,

• higher efficiency.

For feeding of traditional inductor pumps there is a need for additional rather expensive devices - 3-phase variable transformers. For the driving of pumps basing on permanent magnets the standard AC motors can be used.

At Institute of Physics of University of Latvia many models of pumps were tested demonstrating their efficiency. Real pumps for eutectic alloy Pb-Bi at operating temperatures up to 400⁰C have been produced and are operated successfully in liquid metal plants for studies related to development of European Neutron Spallation Sources. Such EMIP design concept can be used also in metallurgy for pumping metals having relatively low melting temperatures and high electrical conductivity, such as aluminium, zinc, magnesium.

E-mail: imants@tesla.sal.lv