Closed-Loop Rotor Flux Estimation in Vector Controlled Induction Motor Drives Operated at Low Switching Frequencies

Tripathi, Avanish and Hari, V S S Pavan Kumar and Narayanan, G (2017) Closed-Loop Rotor Flux Estimation in Vector Controlled Induction Motor Drives Operated at Low Switching Frequencies. In: 2016 IEEE INTERNATIONAL CONFERENCE ON POWER ELECTRONICS, DRIVES AND ENERGY SYSTEMS (PEDES) , DEC 14-17, 2016, Trivandrum, INDIA.

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Abstract

Position sensorless vector control drives in the rotor-flux-oriented reference frame require precise estimation of rotor flux. A few open-loop rotor flux estimation methods are quite popular. However, the performance of these estimators is quite poor when the inverter switching frequency is quite low as in case of high power drives or when the ratio of switching frequency to maximum fundamental frequency is low as in case of high speed drives. This paper investigates an alternative approach of closed-loop rotor flux estimation for motor drives operated at low switching frequencies. This method is shown to be accurate in estimating the rotor flux, and thereby, ensuring good performance of the vector controlled drive at low as well as high speeds. Experimental results are presented on a 3.7-kW, 400-V, 50-Hz, vector controlled induction drive, switched at a frequency of 500 Hz.

Item Type:	Conference Proceedings
Publisher:	IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Additional Information:	Copy right for this article belongs to the IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Trivandrum, INDIA, DEC 14-17, 2016
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	23 Sep 2017 04:54
Last Modified:	23 Sep 2017 04:54
URI:	http://eprints.iisc.ac.in/id/eprint/57899

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