A hybrid seven level inverter topology formed by cascading T-type and active neutral point clamped inverter for induction motor drives

Yadav, AK and Gopakumar, K and Krishna Raj, R and Umanand, L and Bhattacharya, S and Jarzyna, W (2018) A hybrid seven level inverter topology formed by cascading T-type and active neutral point clamped inverter for induction motor drives. In: 44th Annual Conference of the IEEE Industrial Electronics Society, IECON 2018, 20-23 October 2018, Washington, pp. 4423-4428.

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Abstract

This paper proposes a hybrid 7-level inverter scheme formed by cascading basic inverter cells. The proposed inverter is realized by cascading basic 3-level T-type converter with 5-level active neutral point clamped inverter. The proposed topology uses low voltage semiconductor devices and floating capacitors which are balanced in every PWM switching cycle using pole voltage redundancies for every pole voltage levels. The balancing of capacitors are independent of modulation index and load power factor. The topology forms two stacks at the front-end which uses individual symmetrical reduced DC sources and each stack works only for half the fundamental period. The open loop V/f control is simulated as well as experimentally verified on induction machine using proposed inverter topology. The experimental and simulation results for transient and steady state operations are included in the paper. Further, a brief comparison of proposed topology with conventional 7-level topologies have also been included.

Item Type:	Conference Paper
Publication:	Proceedings: IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Balancing; Electric drives; Induction motors; Industrial electronics; Poles; Semiconductor devices; Topology, Active neutral point clamped; Floating capacitor; Fundamental period; Induction machines; Induction motor drive; Inverter topologies; Low-voltage semiconductors; Steady-state operation, Electric inverters
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	29 Jul 2022 09:18
Last Modified:	29 Jul 2022 09:18
URI:	https://eprints.iisc.ac.in/id/eprint/75037

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