New rotor position detector for permanent magnet synchronous machines using the „inform”︁‐method

摘要: A new method for detecting the rotor position of permanent magnet synchronous machines is presented which can be used in any given operating point machine including low speed and standstill. The basic idea to measure differential inductance several space phasor directions. Because magnetic saturation mainly stator teeth, caused by magnets, fluctuates a certain extent. Hence, there coherence between measured angular position. By using special measurement sequence, influence induced voltage due velocity eliminated. Furthermore it shown how integrate usual control concepts. practical realization on digital signal processing system points out usefulness proposed method.