Elimination of position sensors in switched reluctance motordrives: state of the art and future trends
Ehsani, M.; Fahimi, B.
Industrial Electronics, IEEE Transactions on
Volume 49, Issue 1, Feb 2002 Page(s):40 - 47
Digital Object Identifier 10.1109/41.982246
Summary:This paper covers the range of topics related to sensorless
control of switched reluctance motor (SRM) drives from their
fundamentals to their limitations and state of the art and future
trends. This should help the reader to develop a systematic
understanding of the sensorless techniques that have been developed over
the past two decades. The inherent vulnerability to mechanical failures,
extra cost, and size associated with external position sensors such as
optical encoders, resolvers, and custom-designed Hall-effect sensors has
motivated many researchers to develop sensorless control techniques for
SRM drives. Ideally, it is desirable to have a sensorless scheme, which
uses only terminal measurements and does not require additional hardware
or memory while maintaining a reliable operation over the entire speed
and torque range with high resolution and accuracy. Advances in the
development of low-cost digital-signal-processor-based microcontrollers
have paved the way for the fulfillment of this objective. It is,
furthermore, our view that the existing trends in the development of
more powerful processors will ultimately replace the concept of
sensorless controls with the concept of eliminating the need for
position sensing, a concept that will further revolutionize the motor
drive technology
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