Open AccessImplementation of sensorless control of induction machines using only fundamental PWM waveforms of a two‐level converter
Author(s) -
Gao Qiang,
Asher Greg M.,
Sumner Mark
Publication year - 2013
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2012.0517
Subject(s) - control theory (sociology) , pulse width modulation , waveform , observer (physics) , rotor (electric) , voltage , computer science , vector control , signal (programming language) , induction motor , control (management) , engineering , physics , artificial intelligence , electrical engineering , quantum mechanics , programming language
This study reports the implementation of a sensorless control scheme for AC machines that requires neither a fundamental model observer nor a test‐signal. The model is based on saliency detection through the use of fundamental PWM excitation and the measurement of the derivatives of the line currents induced by the PWM voltage vectors. Derivation of the rotor position is possible at low and zero speeds without separate test signals and also at higher speed without the knowledge of the machine's fundamental model. Experimental results showing fully sensorless induction motor control at low and higher speeds validate the principle of this method.