Impact of Under-Compensation and Over-Compensation of Dead-Time Effect on Small-Signal Stability of Induction Motor Drive

Guha, Anirudh and Narayanan, G (2017) Impact of Under-Compensation and Over-Compensation of Dead-Time Effect on Small-Signal Stability of Induction Motor Drive. In: 2016 IEEE INTERNATIONAL CONFERENCE ON POWER ELECTRONICS, DRIVES AND ENERGY SYSTEMS (PEDES) , DEC 14-17, 2016, Trivandrum, INDIA.

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Abstract

Inverter dead-time is known to make open-loop induction motor drives oscillatory, while operating at light-loads in particular. While dead-time compensation schemes exist, precise compensation of the same is often challenging as it involves factors such as device and driver delays and switching transition times, which are difficult to be quantified accurately. Hence, the effect of dead-time could be under-or over-compensated. A theoretical and experimental study on the impact of such under-compensation and over-compensation on the stability of a 100-kW induction motor drive is presented here. Small-signal models are proposed for an open-loop drive, when it is under-compensated and over-compensated. Stability analysis of the above motor drive is reported, which predicts the fundamental frequency range of oscillatory behaviour for both these cases. Further, different types of oscillatory behaviour are observed for the two cases. The analyses are supported by simulation and experimental results.

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 04:59
Last Modified:	23 Sep 2017 04:59
URI:	http://eprints.iisc.ac.in/id/eprint/57888

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