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U. Rieder, M. Schrödl, E. Robeischl:
"Sensorless Low-Cost PM-Synchronous Motor Drive for Full Speed Range including Standstill using INFORM-method and Virtual Short Circuit Model";
Talk: International Conference on Power Electronics and Intelligent Motion (PCIM), Nürnberg, D; 2002-05-14 - 2002-05-16; in: "Prodeedings of the 45th International Conference on Power Electronics/Intelligent Motion/Power Qualitiy", (2002), ISBN: 3-928643-31-2; 89 - 94.

In many applications voltage source inverter fed permanent magnet synchronous motors are operated by a vector control algorithm, at which mechanical sensors for position estimation are in use; for phase current measurement electrically isolated sensors are required.
From the economical point of view, the elimination of these sensors by using sensorless models for position estimation and a DC-link based current controller leads to an extraordinary low cost system. In this paper the realised current estimator-based controller and the sensorless models for full speed range position estimation are presented.