Three-Level Reduced Switch AC/DC/AC Power Conversion System for High Voltage Electric Vehicles

Zahra Sadeghi, Mahdi Shahparasti, Amirhossein Rajaei and Hannu Laaksonen
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Zahra Sadeghi: Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
Mahdi Shahparasti: School of Technology and Innovations, University of Vaasa, 65200 Vaasa, Finland
Amirhossein Rajaei: Department of Electrical and Electronics Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran
Hannu Laaksonen: School of Technology and Innovations, University of Vaasa, 65200 Vaasa, Finland

Sustainability, 2022, vol. 14, issue 3, 1-15

Abstract: Two of the main challenges of recent electric vehicles (EVs) are the charging time and high initial cost. To solve the problem associated with long charging time, the car manufacturers are moving from 400 V battery EV (BEV) to 800 V BEV, which enables the utilization of multi-level converters in EV applications. This paper presents a power conversion system consisting of a Vienna rectifier and a two/three level hybrid inverter as a machine-side inverter to drive a permanent-magnet synchronous motor (PMSM). The Vienna rectifier improves the quality of the grid-side current and provides a regulated DC-link voltage. The proposed inverter, known as a 10-switch inverter, offers high output current quality with a lower number of active switches, making it compact and cost-effective. The field-oriented control (FOC), along with the SPWM modulation, is implemented to control the system. A reliable and cost-effective PMSM drive system demands sensorless control; therefore, a sliding mode observer (SMO) is used to estimate the rotor position and velocity. The accuracy of the proposed system was proved through the simulation results from MATLAB/Simulink.

Keywords: electric vehicle; fast charging; two/three level inverter; PMSM (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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