Title :
Harmonic Analysis of Voltage Zero-Sequence-Based Encoderless Techniques
Author :
Consoli, Alfio ; Scarcella, Giuseppe ; Bottiglieri, Giovanni ; Testa, Antonio
Author_Institution :
Dept. of Electr., Electron., & Syst. Eng., Catania Univ.
Abstract :
This paper exploits the interaction between the low-frequency and the high-frequency fields created by signal-injection techniques during sensorless estimation of the air-gap flux position in induction machines. Such an interaction causes new phenomena that can be summarized in a modulation of the machine saturation level and creation of harmonics that contain information about the position of the flux. This paper analyzes the issues related to the presence of additional fields and predicts the resulting harmonic content using three different approaches such as analytical calculations, computer simulation, and finite element analysis. Experimental measurements confirm the conclusions of this paper
Keywords :
asynchronous machines; finite element analysis; harmonic analysis; magnetic flux; modulation; air-gap flux position; encoderless techniques; finite element analysis; harmonic analysis; induction machines; machine saturation; sensorless estimation; signal injection techniques; voltage zero-sequence; Air gaps; Computer simulation; Data mining; Finite element methods; Harmonic analysis; Helium; Induction machines; Sensorless control; Testing; Voltage; AC machines; high-frequency injection; sensorless control;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2006.882688