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.
Highlights
Based on sustainable development goals, governments have forced industry to produce more green products to prevent rapid climate change and global warming [1]
The simulation results were obtained for three modes, including the motoring operation of the permanent-magnet synchronous motor (PMSM), regenerative braking, and static charging operation in which the inverter and the PMSM are not working
One phase can be modulated by three-level modulation, and the two other phases may be modulated as two-level
Summary
Based on sustainable development goals, governments have forced industry to produce more green products to prevent rapid climate change and global warming [1]. High voltage EVs with fast charging capabilities require a cost-effective and reliable charger to enhance the power factor and current quality on the grid-side and provide a regulated DC-link voltage. [27] reviews several isolated and non-isolated converters that are suitable for the charging infrastructure of EVs. multi-level topologies such as the NPC rectifier and Vienna rectifier are presented for fast charging applications because their dual output structure provides a higher voltage and a low voltage stress across switching devices. The rest of the paper is organized as follows: in Section 2, the proposed PCS is discussed in terms of inverter topology, modulation method, and losses Following this discussion, a three-phase three-level Vienna rectifier is described as a battery charger.
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