Dewani, R and Gopakumar, K and Loganathan, U and Franquelo, LG and Rajashekara, K (2021) Suppression of Lower Order Harmonics using a 21-Concentric 42-sided polygonal Space Vector Structure for Induction Motor Drive Applications. In: 47th Annual Conference of the IEEE Industrial Electronics Society, IECON 2021, 13-16 Oct 2021, Toronto.
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Abstract
A 21-concentric 42-sided polygonal space vector structure (SVS) for suppression of lower order harmonics for Open-End Induction Motor drive applications is proposed in this work. The Open-End Induction Motor is fed with primary and secondary inverters from either side. The primary inverter providing active power for motor operation is fed with an active DC link. The primary inverter is switched at low switching frequency to minimize stress on high voltage switching devices. As a result, the primary inverter consists of lower order harmonics in the pole voltage. The secondary inverter is employed only to suppress the harmonics generated by primary inverter and does not contribute any active power for motoring operation. Hence, the secondary inverter can be fed with a capacitive supply balanced at a nominal voltage. The secondary inverter, operating at lower voltages is switched with high frequency to suppress the lower order harmonics upto 39th order in the motor phase voltage. The advantages of polygonal space vector structures are retained throughout the modulation index, by generating 21-concentric layers of 42-sided polygons. This results in lower switching losses in low frequency switching main inverter and low voltage secondary inverter. A single DC link is employed in the power circuit topology to facilitate four-quadrant operation of the inverter. The proposed scheme is tested in MATLAB simulations and laboratory prototype. The simulation and experimental results are presented. © 2021 IEEE.
Item Type: | Conference Paper |
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Publication: | IECON Proceedings (Industrial Electronics Conference) |
Publisher: | IEEE Computer Society |
Additional Information: | The copyright for this article belongs to IEEE Computer Society |
Department/Centre: | Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology) |
Date Deposited: | 13 Dec 2021 11:31 |
Last Modified: | 13 Dec 2021 11:31 |
URI: | http://eprints.iisc.ac.in/id/eprint/70725 |
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