A Single DC-Link Multilevel 42-Sided Polygonal Voltage Space Vector Generation With Lower Order Harmonic Suppression Using Switched-Capacitor Filter

Dewani, R and Gopakumar, K and Loganathan, U and Franquelo, LG and Rajashekara, K (2022) A Single DC-Link Multilevel 42-Sided Polygonal Voltage Space Vector Generation With Lower Order Harmonic Suppression Using Switched-Capacitor Filter. In: IEEE Transactions on Industrial Electronics, 69 (12). pp. 12369-12378.

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Abstract

In this work, a multilevel 42-sided polygonal space vector structure for suppression of lower order harmonics for open-end induction motor (OEIM) drive applications is proposed. The proposed power circuit topology consists of two inverters feeding an OEIM from either side. The main inverter fed with a single dc-link providing active power for motoring operation is switched at low switching frequency. The secondary inverter fed with a capacitive supply is switched at high frequency to suppress lower order harmonics upto 39th order, up to the base speed of operation allowing maximum utilization of the dc-link. The advantages of lower order harmonic suppression in motor phase voltage, for polygonal space vector structures, are combined with multilevel inverter topology. This offers various advantages like multilevel operation with low inverter switching for the main power delivery inverter and harmonic suppression throughout the modulation range. The low switching frequency primary inverter generates harmonics of the order 6*k ± 1, where k = 1, 2, 3,łdots . The harmonics are suppressed by the capacitor-fed secondary inverter, which supplies only reactive power for suppression of lower order harmonics in motor phase voltage. Use of a single dc-link facilitates four-quadrant operation of the inverter. The proposed scheme is validated for steady-state and dynamic performance by experimental results.

Item Type:	Journal Article
Publication:	IEEE Transactions on Industrial Electronics
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:	Electric drives; Electric inverters; Electric power transmission; Induction motors; Optical resonators; Pulse width modulation; Topology; Vector spaces; Vectors; Voltage control, Aerospace electronics; Flying capacitor; Harmonic suppression; Induction motor drive; Inverter; Multilevel inverter; Multilevels; Polygonal space vector structure; Power systems harmonics; Pulsewidth modulations (PWM); Space Vector; Vector structures, Harmonic analysis
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	17 Sep 2022 03:34
Last Modified:	17 Sep 2022 03:34
URI:	https://eprints.iisc.ac.in/id/eprint/76576

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