E-Type Asymmetric Multilevel Inverter Based Transformer less Traction Drive
Ashok Kumar Mohapatra1, Minakhi Behera2, Nanda Kishore Ray3

1Ashok Kumar Mohapatral, M. Tech in Power Electronics & Drives from College of Engineering & Technology in 2018.
2Minakhi Behera, Assistant Professor at College of Engineering & Technology, Bhubaneswar.
3Nanda Kishore Ray, Assistant Professor at Centurion University, Odisha.

Manuscript received on 11 July 2019 | Revised Manuscript received on 17 July 2019 | Manuscript published on 30 August 2019 | PP: 2579-2589 | Volume-8 Issue-10, August 2019 | Retrieval Number: J92930881019/19©BEIESP | DOI: 10.35940/ijitee.J9293.0881019
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: To overcome the limitations of conventional multilevel inverter such as of more no. of power semiconductor switches, large no. of capacitors, more switching loss etc., a new topology of Envelope type (E-type) MLI is used. This E-type Module has some preferable features like reduced no. of components and low switching frequency. This E-type asymmetric converter uses four unequal DC sources and ten switches to generate 13 level of output voltage. SHE modulation technique is used to achieve high quality output voltage with low harmonic content. This E-type converter configuration will be used in transformer less traction drive. Nowadays Induction motors are used as electric drives for most of the electric railways. A transformer less connection is used for feeding Induction motor. This converter-inverter configuration will convert single phase AC voltage to DC and again this DC voltage will be converted into three phase AC. The output of the E-type Multi level inverter will be used to drive the Induction motors.
Index Terms: MLI, E-type, Asymmetric, SHE, Transformer less.
Scope of the Article: Networked-Driven Multicourse Chips