Sensorless control of induction motors using multi-level converters
- 1 January 2012
- journal article
- Published by Institution of Engineering and Technology (IET) in IET Power Electronics
- Vol. 5 (2), 269-279
- https://doi.org/10.1049/iet-pel.2010.0264
Abstract
This study describes a sensorless speed control scheme for induction motors supplied by a multi-level inverter. The scheme exploits the low DC link voltage used in some of the multi-level converter configurations which employ H-Bridges. The rotor position is tracked by measuring the rate of change of motor stator currents when low-voltage test vectors are applied using the H-Bridges. In this way, the motor current distortion introduced by the sensorless control scheme is reduced compared to that seen when using a two-level converter. The proposed approach could therefore be applied to high-power motor drives, and automotive drive systems. The study presents a theoretical derivation of the algorithm and experimental results which show the improvement in the motor current quality achieved using the new technique compared to sensorless techniques implemented on a two-level inverter.Keywords
This publication has 9 references indexed in Scilit:
- Hybrid cascaded multilevel inverter with PWM control method2008 IEEE Power Electronics Specialists Conference, 2008
- Sensorless control of induction Machines at zero and low frequency using zero sequence currentsIEEE Transactions on Industrial Electronics, 2006
- Mitigation techniques of conducted emi in multilevel inverter drivesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Optimized INFORM Measurement Sequence for Sensorless PM Synchronous Motor Drives With Respect to Minimum Current DistortionIEEE Transactions on Industry Applications, 2004
- Elimination of Saturation Effects in Sensorless Position-Controlled Induction MotorsIEEE Transactions on Industry Applications, 2004
- Sensorless speed and position control of synchronous machines using alternating carrier injectionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Hybrid multilevel power conversion system: a competitive solution for high-power applicationsIEEE Transactions on Industry Applications, 2000
- Transducerless position and velocity estimation in induction and salient AC machinesIEEE Transactions on Industry Applications, 1995
- High-resolution velocity estimation for all-digital, AC servo drivesIEEE Transactions on Industry Applications, 1991