###### Abstract  
Electric vehicles usage and adoption have expanded rapidly over the last decade, as the global energy demand is shifting away from fossil fuels. The recent development of electric vehicle charging technology, which is a fast charging mode, enables an electric vehicle to be fully charged within 10 minutes. However, the generated harmonics, control complexity, and cost of fast charging are the main challenges that need to be addressed to further expand the electric vehicle fast charging technologies. In this manuscript, a new electric vehicle fast charger was designed by introducing the three-stage converters based on the integration between internal model controller with synchronized decoupled controller algorithms. The proposed charger can provide two types of charging approaches, namely alternating current (AC) fast charging and direct current (DC) fast charging. To verify the effectiveness of the proposed charger, the model is developed and simulated in MATLAB/Simulink 2018a platform. Additionally, experimental verification, which utilizes a digital signal processor (TMS320F28335), is conducted to further support the design concept and the simulation findings. These research results have indicated that the proposed charger is applicable for fast AC and DC charging. Moreover, the total harmonic distortion value for the input current is 1.55%, where it has constantly been maintained within the standard limits, thus showing the effectiveness of proposed charger in performing the charging process without causing any significant impact to the grid. EV fast charging; internal model controller; decoupled controller; total harmonic distortion 2020 10 4179 10.3390/app10124179 10. (50 kW or higher) [2]. The main challenge of slow charging is that it takes a longer time to fully charge the battery, typically around 8 to 12 h.  
Nowadays, an EV with lithium-ion battery is sustainable for 100 kilometers range, where the battery could be fully charged within 30 min by using a fast charging approach. In this respect, a real implementation of EVs fast charging station equipped with an energy storage system is briefly presented in [3], where multiple EV charging stations with AC distribution network has been analyzed accordingly. In order to decrease the high energy demanded from the grid for EV fast charging, a renewable energy can be installed in the charging stations [4]. The modeling of a high-power density, efficient, and reliable fast charging has become a major challenge of expanding the number of EVs globally. In other words, one of the main issues with EV fast charging is the usage of power electronics devices; such as rectifiers, inverters, and converters that potentially generate harmonics distortion into the electricity grid. These harmonics have a major impact on the stability and power quality of the electricity grid. In addition, the charging currents and voltages with high total harmonic distortion (THD) can eventually damage other electrical and electronic devices around the charger station, such as conductors and transformers [5]. Recently, the THD that are generated through an EV charging process is standardized by IEC 1000-3-2 and SAE J2894/1 standards, where these standards are highlight the limit of THD allowed by EV charging [6]. One of the commonly used approach to eliminate these harmonics distortion is by using a passive filter, where this approach provides a low impedance path to the harmonics currents Several researchers generally utilized passive filter in order to reduce THD of EV fast charging stations [7; 8; 9], and most typical ones is a single tuned filter. The single tuned filter is designed to mitigate a specific harmonic component from the charging system by a properly sized inductance, capacitance, and resistance values [10]. The authors in [11] proposed a band-pass inductor-capacitor (LC) filter integrated into an asymmetric synchronous reference of an EV charger connected to the grid to mitigate the 5 th and 7 th harmonic components.