Dynamic Simulation of Robust Sensor less Speed Measurement in IM Using MRAC against Variations in Stator Resistance and Rotor-Time Constant
Srikanth Mandarapu1, Sreedhar Lolla2, Madhu Chandra Popuri3
1Srikanth Mandarapu, Electrical & Electronics Engineering, JNTU-K, Pydah College of Engineering & Technology, Visakhapatnam, India.
2Sreedhar Lolla, Electrical & Electronics Engineering, JNTU-K Pydah College of Engineering & Technology, Visakhapatnam, India.
3Madhu Chandra Popuri, Electrical & Electronics Engineering, JNTU-K, Pydah College of Engineering & Technology, Visakhapatnam, India.
Manuscript received on May 19, 2013. | Revised Manuscript received on June 10, 2013. | Manuscript published on June 30, 2013. | PP: 52-55 | Volume-2, Issue-5, June 2013. | Retrieval Number: E1672062513/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper proposes a Model Reference Adaptive Control (MRAC) which makes use of both back EMF and Reactive Power methods for sensor less rotor speed measurement against variations in rotor time constant in addition to the variations in stator resistance. The adjustable model makes use of these two methodologies eliminates the need to calculate rotor flux, thus avoiding the requirement of synchronously rotating reference angle and the stable speed can also be estimated even at low speeds. The effectiveness of the proposed model is proved with extensive computer simulation.
Keywords: Back emf method, Reactive power method, Rotor Speed, Sensorless Control, Stator Resistance.