Abstract
Traction inverter has been the subject of many studies due to its essential role in the proper performance of the drive system. With the recent trend in increasing the input voltage in battery-powered electric vehicles, multilevel inverters have been proposed in the literature as a promising substitute for conventional two-level traction inverters. A critical aspect of utilizing multilevel structures is employing proper control and modulation techniques. The control system structure must be capable of handling a number of key issues, like capacitor voltage balancing and equal power loss sharing, which arise in multilevel topologies. This paper presents a review of the present-day traction drive systems in the industry, control and modulation techniques for multilevel structures in the inverters, as well as the principal challenges that need to be addressed in the control stage of the multilevel traction inverter. A comparison has been made between different methods based on the most important criteria and requirements of the traction drive system. Finally, future trends in this application are presented and some suggestions have been made for the next generation of traction drives.
Highlights
This paper aims at presenting a literature review and comparison of control and modulation techniques for multilevel drives in this specific application, as well as predicting future trends and challenges
DISCONTINUOUS PULSE WIDTH MODULATION The discontinuous pulse width modulation (DPWM) scheme, which was first proposed for two-level inverters, is capable of reducing switching losses considerably by eliminating switchings at the peak of the sinusoidal currents
Integration of the inverter and on-board charger (OBC) is one of the proposed solutions in this regard that enabled a single power electronic converter for both purposes [127]. This idea has been applied to the case of two-level structures in present-day traction drives, it requires accurate control and modulation techniques in the case of multilevel inverters to ensure equal voltage balancing on the capacitors in both operation modes
Summary
Electric vehicles (EVs) are the ultimate replacement of internal combustion engine vehicles (ICEVs) due to the reduced. Higher DC-link voltage in an electric traction drive reduces the recharging time of the batteries by enabling extreme fast charging (XFC). It can reduce the cables’ size and weight, increase the overall system power density, and reduce the conduction losses in the inverter [7]–[9]. This paper aims at presenting a literature review and comparison of control and modulation techniques for multilevel drives in this specific application, as well as predicting future trends and challenges. Some of the manufacturers have chosen higher battery voltages due to some advantages like reducing the recharging time, reducing the conduction loss, and increasing the power density of the drive system. New BMS designs, capable of protecting and balancing the larger number of cells in series are required
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
