Title: Induction motor current ripple minimisation with PV based SEPIC-cascaded inverter

Authors: Walid Emar; Zayed Huneiti; Zakaria Al-Omari

Addresses: Faculty of Engineering, Electrical Department, Isra University, Amman, 11622, Jordan ' Faculty of Engineering Technology, Electrical Engineering Department, Al-Balqa Applied University, Amman 11134, Jordan ' Faculty of Engineering, Electrical Department, Isra University, Amman, 11622, Jordan

Abstract: In this study, an induction motor is supplied from a SEPIC converter that is extracting a direct current from a photovoltaic solar cell system. The DC output voltage of the SEPIC is converted to a five-level AC output voltage using a cascaded H-bridge inverter. To minimise the harmonic content generated at the induction motor and inverter output, a new topology of "Multi-Carrier PWM techniques" known as the hybrid trapezoidal technique (HTrap) is used to control the switching of the five-level cascaded inverter (MLCI). HTrap technique ensures maximum efficiency of the whole set (PV based SEPIC-inverter-motor) and the lowest total harmonic distortion (THD), harmonic factor (HF), and crest factor (KF). This study also deals with the SEPIC converter performance within the region of discontinuity. Computer simulations using Simplorer 7 or Matlab and Excel have been done to validate the concepts of SEPIC converter and the MLCI with AC motors.

Keywords: induction motor control; SEPIC converter; harmonic content; five-level cascaded H-bridge three-phase inverter; HTrap; hybrid trapezoidal carrier PWM technique; generic block diagram; solar power generation; PWM; pulse width modulation; induction motor drives; harmonic distortion.

DOI: 10.1504/IJMIC.2020.113719

International Journal of Modelling, Identification and Control, 2020 Vol.35 No.2, pp.151 - 165

Received: 17 Feb 2020
Accepted: 25 Mar 2020
Published online: 19 Mar 2021 *

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