Ultra-High Temperature (250 ∘ C) Bearingless Permanent Magnet Pump for Aggressive Fluids

Bearingless pumps have been established in applications that demand high purity and reliability. To expand their temperature operation range, careful machine design needs to be critical. High operating temperatures generate mechanical stress upon the dissimilar materials of the motor, such as potting, copper, iron, etc., shortening their lifetime. To guarantee faultless operation, precise knowledge about internal operating temperatures is required. A bearingless motor capable of pumping the highest fluid temperature (250 °C) to our knowledge is presented. Thermal and hydraulic performance are experimentally verified.