[Zurück]


Zeitschriftenartikel:

M. Vogelsberger, S. Grubic, T Habetler, T. Wolbank:
"Using PWM-Induced Transient Excitation and Advanced Signal Processing for Zero-Speed Sensorless Control of AC Machines";
IEEE Transactions on Industrial Electronics, 1 (2010), 57; S. 365 - 374.



Kurzfassung englisch:
The sensorless control of induction machines, particularly
for operation at low speed, has received significant attention
in recent years. To realize a field-oriented control of ac machines
that is able to work at zero speed, the most commonly used methods
are either sensor-based models or transient-signal-excitation
methods. The major disadvantage of present signal-injection
methods is that they are intrusive to pulsewidth modulation
(PWM). An additional switching sequence has to be embedded in
the control that will cause a torque and current ripple. In order
to overcome these problems, a new flux-estimation algorithm that
uses the phase current derivative to extract the flux-position information
is presented. In contrast to previously introduced methods,
this new approach operates without additional transient excitation
of the machine and requires only fundamental-wave excitation
using standard PWM or slightly modified PWM. Furthermore,
only the current response in the two active states of PWM is used.
This makes it possible to use sensorless control for the whole speed
range including overmodulation and removes the distortion and
parasitic influence of the zero switching states during the estimation
of the flux. Experimental results are presented to validate the
applicability of the presented approach.


Elektronische Version der Publikation:
http://publik.tuwien.ac.at/files/PubDat_186944.pdf


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.