Sensorless oil drowned pump drive

This work presents the digitally controlled sensorless drive applied to a drowned pump. The developed drive provides the high function quality and high reliability. The drive architecture from the reliability viewpoint is described and analyzed. The new control and estimation algorithms that have been used are briefly presented. The construction of the used voltage source inverter and control is examined. The results of the drive simulation, confirming high dynamic accuracy and in addition simplification of the digital control and reduction of the required controller computing capacity are presented.