Auteur Lennart Harnefors
Documents disponibles écrits par cet auteur (6)
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Oskar Wallmark, Auteur ; Lennart Harnefors, Auteur ; Carlson, Ola, Auteur |This paper proposes control algorithms for a fault-tolerant permanent-magnet synchronous motor (PMSM) drive. In order to improve the reliability of the drive, an algorithm for achieving a sensorless control that operates properly also in fault m[...]
Article : texte imprimé
Pietilainen, Kai, Auteur ; Lennart Harnefors, Auteur ; Petersson, Andreas ; Nee, Hans-Peter |Previous results concerning instability of the dc link in inverter drives fed from a dc grid or via a rectifier are extended. It is shown that rectifier–inverter drives equipped with small (film) dc-link capacitors may need active stabilization.[...]
Article : texte imprimé
Lennart Harnefors, Auteur |All proofs of global stability attempted so far have failed. Hence, it is doubtful that such observers exist. Toutes les preuves de stabilité globale essayées jusqu'ici ont échoué. Par conséquent, il est douteux que de tels observateurs exi[...]
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Lennart Harnefors, Auteur |A compilation of methods for modeling and analysis of thre-phase dynamic systems--such as ac machines, resistance-inductance-capacitance components, and power electronic converters including their control algorithms--using complex transfer funct[...]
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Lennart Harnefors, Auteur ; Ottersten, Rolf, Auteur |Reversal of rotation under load of sensorless induction motor drives is very challenging, as there is often an unstable region in the low-speed regenerating mode. In this paper, a variant of the classical "voltage model", i.e. the "statically co[...]
Article : texte imprimé
Oskar Wallmark, Auteur ; Lennart Harnefors, Auteur |This paper considers speed and position estimation of salient permanent-magnet synchronous machines (PMSMs). An estimator of phase-locked loop (PLL) type is considered. Signal injection techniques are used in the zero-speed and low-speed regions[...]
