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Extending the Linear Modulation Range to Full Base Speed Independent of Load Power Factor for a Multilevel Inverter Fed im Drive

Majumder, MG and Rakesh, R and Imthias, M and Gopakumar, K and Loganathan, U and Jarzyna, W (2020) Extending the Linear Modulation Range to Full Base Speed Independent of Load Power Factor for a Multilevel Inverter Fed im Drive. In: IEEE Transactions on Industrial Electronics, 67 (11). pp. 9143-9152.

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Official URL: https://dx.doi.org/10.1109/TIE.2019.2956373


In this article, a method is proposed for the first time, to increase the linear modulation range till full base speed irrespective of load power factor for a multilevel inverter fed induction motor drive. A five-level inverter with a single dc source is used for the proposed scheme. Using this method, linear pulsewidth modulation (PWM) operation of the inverter can be achieved till peak phase fundamental voltage of 0.637 Vdc without exceeding machine phase voltage rating. This method eliminates all the lower order harmonics from machine phase voltage till the full speed range of operation. The proposed five-level inverter scheme is realized by cascading a two-level inverter with a capacitor fed H-bridge, feeding open-end induction motor drive from one end and a capacitor fed two-level inverter from the other end. The proposed scheme uses space vector redundancy to balance all the capacitors during its operation. Operation of the proposed drive is analyzed extensively for normal five-level operation as well as during the extended modulation range. Experimental results for steady state and transient state operation are presented to validate the proposed scheme © 1982-2012 IEEE.

Item Type: Journal Article
Publication: IEEE Transactions on Industrial Electronics
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: Copy right for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords: Bridge circuits; Electric drives; Electric motors; Electric power factor; Induction motors; Pulse width modulation; Vector spaces, Five level inverter; Induction motor drive; Linear modulations; Load power factor; Lower order harmonics; Multilevel inverter; Steady state and transients; Two-level inverters, Electric inverters
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 13 Mar 2021 06:51
Last Modified: 13 Mar 2021 06:51
URI: http://eprints.iisc.ac.in/id/eprint/66351

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