Abstract
Electric vehicle charging technology has recently witnessed massive developments due to its significant role in the ever-growing number of electric vehicles on the market. The integrated on-board charger technology (IOBC) represents an effective and attractive solution to reduce EV size, cost, and weight. IOBC technology employs propulsion components, such as the motor and its converter, in the charging process. The main objective of IOBC is to achieve the maximum charging current with zero average/pulsating torque so that mechanical interlocking can be dispensed. Recently, some of the IOBC topologies have adopted machines with six-phase stators to exploit the many advantages of multiphase-based systems. This paper investigates the effect of the winding design, namely, chorded or un-chorded designs, as well as the winding configuration, namely, dual three-phase, asymmetrical, or symmetrical winding configurations, on the current quality of a six-phase-based non-isolated IOBC. The relation between the winding design and the induced low order harmonics in the charging current is first clarified. The required current controller structure is then proposed, which ensures balanced grid line currents with high quality, under either healthy or one-phase fault conditions. Finally, a comparative study between all available designs with the proposed current controller is carried out to validate the theoretical findings.
Highlights
A clean, energy-based transportation is globally required as a major step to hold back climate change and the greenhouse effect
Extensive investments are focusing on developing Electric vehicles (EVs)-based technologies and their components, such as electric motor design, converter design, innovative control techniques, batteries, and battery chargers [1]
This paper investigates a six-phase induction machine (SPIM)-based integrated onboard charger technology (IOBC) with the three available winding configurations, namely, D3P, ASP, and S6P, under both healthy case (HC) and single open phase fault (1OPF) case
Summary
A clean, energy-based transportation is globally required as a major step to hold back climate change and the greenhouse effect. Electric vehicles (EVs) impose themselves as a promising alternative to the conventional diesel engine vehicles. Extensive investments are focusing on developing EV-based technologies and their components, such as electric motor design, converter design, innovative control techniques, batteries, and battery chargers [1]. One of the major challenges that has curbed the use of EVs widely is the limited range that car can go on one charge [2]. This, in turn, sheds light on developing different charging technologies of EVs, starting from battery design and ending up with charger types. In this context, EV chargers are classified into two main categories: off-board and on-board chargers [3]
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