Fremgangsmåde og kredsløbsindretning til følerfri omdrejningsvinkelregistrering af en dæmperfri, fortrinsvis permanentmagnet-magnetiseret, via en omformer forsynet synkronmaskine

摘要

PCT No. PCT/AT91/00081 Sec. 371 Date Feb. 11, 1993 Sec. 102(e) Date Feb. 11, 1993 PCT Filed Jul. 2, 1991 PCT Pub. No. WO92/01331 PCT Pub. Date Jan. 23, 1992.A method and circuit arrangement for the sensor-less detection of the angle of rotation of a synchronous machine without a damper is disclosed. According to the disclosed method and circuit arrangement, measuring signals are used which correspond to voltage jumps or pulses generated by a rectifier and the measuring data obtained are provided to a calculating device which calculates the position of the rotor from the dependence of the stator reactance, whereby premagnetization is set when the synchronous machine is started and a measurement is made on each field weakening and strengthening effect. The advantage of the invention resides in both its high precision and the fact that no additional analog current sources are needed to locate the magnet wheel. In addition, the magnet wheel can be located at any load.