Sensorless control of high-speed PM BLDC motor

In the paper were examined the possibilities to control a high-speed sensorless PM BLDC motor, with a target speed 100 000 rpm and power 1 kW, designed in the Department of Power Electronics, Electrical Drives and Robotics - KENER, Silesian University of Technology. The article describes methods based on phase voltages integration and the third harmonic, also presents a method of open-loop starting and ways of determining the position of the stopped rotor. Described sensorless control methods were examined by computer simulation, in order to test the possibilities of their implementation in the high-speed motor project.