Performance Enhancement of PPMIM Drives by using 3 Three-Phase Four-Leg Inverters

Bhimireddy, Prathap Reddy Reddy and Iqbal, Atif and K, Siva Kumar and Alhitmi, M.A. and Hasan, Anwarul and Mehrjerdi, H and Paraprath, Asokan and Shakoor, Abdul (2021) Performance Enhancement of PPMIM Drives by using 3 Three-Phase Four-Leg Inverters. IEEE Transactions on Industry Applications. p. 1. ISSN 0093-9994

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In this paper, a multilevel inverter (MLI) scheme is proposed for 9-phase pole phase modulated induction motor (PPMIM) drives. The proposed inverter scheme is realized with the help of 3 three-phase four-leg inverters. In 3-phase 12-pole mode (3PH-12PO), the proposed MLI supplies a 3-level voltage for each phase winding of the PPMIM drive with an improved harmonic profile, which results in better torque ripple. In this mode, the PPMIM drive performance is analyzed with a level shifted as well as phase shifted carrier based space vector pulse width modulation (SVPWM). In 3PH-12PO mode, for getting the same performance the PPMIM drive w.r.t torque ripple the conventional 3-level 9-phase MLI's requires 40 switches, while the proposed MLI requires only 24 switches, which means the switch count is reduced by 40%. On the other hand, the phase grouping will give the flexibility to use the 3-phase SVPWM that enhances the linear modulation of the 9-phase PPMIM drives by 15.4% in 9-phase 4-pole mode (9PH-4PO). The 4th leg present in each three-phase four-leg inverter is used effectively for suppressing the circulating currents in 9PH-4PO operation. The proposed MLI is efficient to operate the machine in both normal as well as fault condition with rated power/torque. The proposed MLI fed PPMIM drive performance with open circuit switch/source fault conditions is analyzed. The proposed MLI scheme is validated with the Ansys Maxwell FEM as well as laboratory testbed on a 5hp 9-phase PPMIM drive under normal as well as open circuit switch/source fault conditions IEEE.

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IITH CreatorsORCiD
Item Type: Article
Uncontrolled Keywords: Circuit faults, Finite element Method, Harmonic analysis, Linear modulation, Multi, level inverters, PPMIM drives, Space vector pulse width modulation, SVPWM, Switches,Topology, Torque measurement, Windings
Subjects: Electrical Engineering
Electrical Engineering > Automation & Control Systems
Electrical Engineering > Electrical and Electronic
Divisions: Department of Electrical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 08 Mar 2021 06:59
Last Modified: 08 Mar 2021 06:59
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