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AuthorReddy, B. Prathap
AuthorMeraj, Mohammad
AuthorIqbal, Atif
AuthorKeerthipati, Sivakumar
AuthorBhaskar, Mahajan Sagar
Available date2022-03-06T05:21:56Z
Publication Date2021
Publication NameIEEE Transactions on Industrial Electronics
AbstractIn pole-phase modulation, the phase order is coming down by pole ratio times in high pole mode, which results in the higher magnitude of spatial harmonics as well as higher torque ripple. In this article, the available three identical voltage-fed windings per effective phase in three-phase 12-pole (3PH-12PO) mode are used to develop the simple multilevel inverter (MLI) configuration for minimizing torque ripple. The proposed MLI scheme is realized with three five-leg inverter modules. Each five-leg inverter module will generate three-level voltage across the phase, thereby resultant voltage seen by each phase winding is five-level voltage in 3PH-12PO mode. This multilevel voltage will improve the torque ripple profile of the motor drive. In addition, the proposed MLI scheme along with phase grouping will enrich the linear modulation range of the pole-phase-modulated induction motor (PPMIM) drive in nine-phase four-pole (9PH-4PO) mode. The switches used to generate a multilevel voltage in 3PH-12PO mode are effectively utilized for blocking the flow of circulating currents. As compared with other conventional nine-phase five-level inverters the proposed five-level inverter requires only 30 switches and it does not require extra clamping diodes/capacitors and extra bidirectional switches for isolating neutrals in 9PH-4PO operation. The validation of proposed MLI scheme is done on a 5-hp nine-phase IM with Ansys Maxwell as well as laboratory prototype for entire modulation range using V/f = constant control.
SponsorQU High Impact (Grant Number: QUHI-CENG-19/20-2)
PublisherInstitute of Electrical and Electronics Engineers Inc.
SubjectCarrier-based space vector pulsewidth modulation (SVPWM)
linear modulation range
multilevel inverter (MLI)
multiphase induction motor (MIM) drives
pole phase modulation
torque ripple profile (TRP)
TitleA Hybrid Multilevel Inverter Scheme for Nine-Phase PPMIM Drive by Using Three-Phase Five-Leg Inverters
Issue Number3
Volume Number68

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