Unidirectional voltage converter for battery electric vehicle ultrafast charger
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REVIEW PAPER
Unidirectional voltage converter for battery electric vehicle ultrafast charger Jerzy Ryszard Szymanski1
•
Marta Zurek-Mortka1 • Dulal Acharjee2
Received: 24 August 2020 / Accepted: 5 September 2020 Ó The Author(s) 2020
Abstract This paper proposes the use of a frequency converter used in the AC motor drives to build a fast charging battery converter for electric vehicles (EV). The possibility of using semiconductor integrated modules with two-level inverters and diode rectifiers for the construction of high power voltage DC/DC converters has been demonstrated. The DC voltage of the EV battery during charging is obtained by rectifying the three-phase voltage of the PWM inverter. A 600 V DC microgrid was used to power the inverter. Simulation tests of the DC/DC converter model were carried out. The results of simulation tests were verified experimentally on a laboratory stand.
1 Introduction The infrastructure for fast charging of large-capacity batteries of autonomous work machines is an important factor for their widespread use in industry. Lack of air pollution, quiet operation and limited heating of the environment are the basic features enabling the use of mobile machines powered by energy accumulated in the battery in many industries. The location of the fast battery charging station in the immediate surroundings of the workplace of work machines reduces the time required to charge their battery. It is expected that the participation of people and classic machines powered by internal combustion engines in the principles of mining, agriculture and many other onerous workplaces will be replaced by electric autonomous work machines. Battery powered electric machines meet stringent ecological requirements, safety and unattended operation. The use of artificial intelligence and machine learning algorithms to control work machines is already found even in household appliances. & Jerzy Ryszard Szymanski [email protected] Marta Zurek-Mortka [email protected] Dulal Acharjee [email protected] 1
Kazimierz Pulaski University of Technology and Humanities, Radom, Poland
2
Applied Computer Technology, Kolkata, India
In industry, drive frequency converters (FCs) are commonly used to power induction motors of adjustable speed. Low-voltage FCs reach powers of 2 MW and are located in the vicinity of motors, e.g. of pumps, belt conveyors, fans, etc. (Danfoss 2016). Usually, each high-power motor is powered by an individual frequency converter (Danfoss 2020). It can be argued that drive FCs are evenly distributed over the entire working surface of an industrial plant. The plant’s AC network supplies energy to these converters and is equipped with safeguards appropriate for their nominal power. The authors decided to use the existing industrial plant power supply system to develop a battery charging station for autonomous mobile work machines. For this purpose, the functionality of drive FCs was expanded to the function of fast charging according
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