Optimal PWM in Three Level Inverter FED Induction Motor Drives with Quarter Wave Symmetry Relaxed

Rai, Neerparaj; Maheshwari, Ashish; Rai, Bijay

doi:10.1109/icctct.2018.8550847

2018 International Conference on Current Trends Towards Converging Technologies (ICCTCT) 2018

DOI: 10.1109/icctct.2018.8550847

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Optimal PWM in Three Level Inverter FED Induction Motor Drives with Quarter Wave Symmetry Relaxed

Neerparaj Rai

Ashish Maheshwari

Bijay Rai

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2022

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Cited by 1 publication

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Optimal PWM in Three-Level Inverter for THD Minimization with Quarter Wave Symmetry Relaxed

Rai

Chakravorty

2022

EEENG

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Background: Previous works on total harmonic distortion (THD) minimization for multilevel inverters (MLI’s) has made a symmetrical approach that imposes Quarter Wave Symmetry (QWS) and Half Wave Symmetry (HWS) with the aim to restrict the computational difficulties to solve the finalized non-linear expressions. Objective: However, QWS constraint can be abolished, which leads to more generalized formulations and multiple solutions corresponding to minimum THD for complete modulation index-range. Methods: A systematic search approach using MATLAB in-build function is adopted to investigate ideal angles of switching related to three-level, three-phase inverter restricted to only HWS as a constraint for two and three (i.e., N= 2 and 3) switching transitions per quarter cycle. Results: On account of the effective minimization of the dominant low-order odd line voltage harmonics, the proposed pulse-width-modulation (PWM) scheme proved its superiority based on minimum THD% performance compared to the previously reported PWM techniques with both HWS and QWS being retained. Conclusion: The simulation, as well as experimental results to confirm the efficacy of the proposed non-symmetrical PWM scheme over the traditional PWM method restricted to QWS and HWS symmetries over the entire modulation-index range with added advantage of general formulation and multiple solutions.

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Optimal PWM in Three-Level Inverter for THD Minimization with Quarter Wave Symmetry Relaxed

Rai

Chakravorty

2022

EEENG

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Optimal PWM in Three Level Inverter FED Induction Motor Drives with Quarter Wave Symmetry Relaxed

Cited by 1 publication

References 7 publications

Optimal PWM in Three-Level Inverter for THD Minimization with Quarter Wave Symmetry Relaxed

Optimal PWM in Three-Level Inverter for THD Minimization with Quarter Wave Symmetry Relaxed

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