
handle: 10576/27623
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-I2PO), the proposed MLI supplies a 3-level voltage for each phase winding of the PPMIM drive with an improved harmonic profile. This will minimize the amplitude of spatial harmonics in the airgap MMF, which results in better torque ripple in 3PH-I2PO operation. In this mode, for getting the same performance the PPMIM drive in 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 windings of the 9-phase PPMIM drive are rearranged into 3 sets of three phase winding groups, where each phase group has three balanced 1200 phase displaced windings. This phase grouping will give the flexibility to use the 3-phase space vector pulse width modulation (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 denying the circulating currents in phase windings in 9PH-4PO operation. The proposed MLI scheme is validated with the Ansys Maxwell FEM electromagnetic tool on a 5hp 9-phase PPMIM drive.
Finite element method, space vector pulse width modulation (SVPWM), pole phase modulated induction motor (PPMIM) drives, linear modulation, multilevel inverters (MLIs)
Finite element method, space vector pulse width modulation (SVPWM), pole phase modulated induction motor (PPMIM) drives, linear modulation, multilevel inverters (MLIs)
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 5 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
