[Back]

T. Wolbank, J. Machl:
"Design and Comparison of Transient Excitation Sequences for Zero Speed Sensorless Control of Ac Machines";
Talk: International Conference on Electrical Machines ICEM, Chania, Crete, Greece; 2006-09-02 - 2006-09-05; in: "Proceedings of International Conference on Electrical Machines ICEM", (2006), 1 - 6.

Abstract - High dynamic and controlled operation of ac machines implies the presence of a speed or position encoder mounted to the rotor shaft. Omitting this sensor in the speed range around zero frequency so far is only possible by exploiting the high frequency and transient electrical properties of the machine. This is only possible by applying a high frequency or transient excitation to the terminals of the machine. In this paper the transient excitation of the machine with voltage pulses is investigated and different pulse sequences are compared with respect to the influence on signal quality, resulting current ripple, requirement of calculation power, and acoustic noise emission. Starting with a pulse sequence separated from the fundamental wave excitation different variations of sequences are discussed with the goal to establish an integration of fundamental wave and transient excitation into one resulting pulse width modulation.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06586407