Unidirectional voltage converter for battery electric vehicle ultrafast charger

Szymański, J.; Żurek-Mortka, Marta; Acharjee, Dulal

doi:10.1007/s00542-020-05038-7

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…250–300 Hz or 900–1000 Hz, depending on the properties of the drive converter. The presented solution is described in detail in 1 , 2 , other types of converters used in the EV battery charging stations are presented in 3 . The basic harmonics of the phase voltage of PWM inverter reaches the frequency up to kilohertz 4 (this is inverter switching frequency) when the PWM amplitude modulation factor is near zero.…”

Section: Introductionmentioning

confidence: 99%

The resistive ground fault of PWM voltage inverter in the EV charging station

Żurek-Mortka

Szymański

2021

Sci Rep

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During the direct touch of the inverter output voltage or with the ungrounded shield of the cable connecting the inverter to the motor or other type of load, the nonsinusoidal ground currents with a basic harmonic frequency between 1.5 and 16 kHz, flow via a human’s body. Here was proved that Residual Current Device (RCD) ($$I_{\triangle n}$$ I ▵ n = 30 mA) does not switch off the power supply when a ground current with a value of about some hundred milliamps occurs. Because RCDs do not disconnect the power supply, the touch on the inverter’s voltage is dangerous to health and life. For the authors, the RCD usage in the Voltage Frequency Converters (VFCs) is not a good engineer practice when high-frequency common-mode distortion currents flow through it. The paper presents tests of RCD operation in the event of a resistance ground fault (via human body) during EV battery charging where the PWM voltage inverter is connected to the external rectifier to provide DC charging battery voltage. Finally, the authors propose a method of eliminating common-mode (CM) current from short protection system by using a separate circuit in which the parasitic leakage current omits an RCD.

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Section: Introductionmentioning

confidence: 99%

The resistive ground fault of PWM voltage inverter in the EV charging station

Żurek-Mortka

Szymański

2021

Sci Rep

Self Cite

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“…The employment of soft switching techniques; losses of the converter are reduced [153] Electronics 2021, 10, x FOR PEER REVIEW 27 of 46 [153] C2…”

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confidence: 99%

Electric Vehicles Charging Stations’ Architectures, Criteria, Power Converters, and Control Strategies in Microgrids

Abraham

Verma

Kanagaraj³

et al. 2021

Electronics

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The usage of electric vehicles (EV) has been increasing over the last few years due to a rise in fossil fuel prices and the rate of increasing carbon dioxide (CO2) emissions. EV-charging stations are powered by existing utility power grid systems, increasing the stress on the utility grid and the load demand at the distribution side. DC grid-based EV charging is more efficient than AC distribution because of its higher reliability, power conversion efficiency, simple interfacing with renewable energy sources (RESs), and integration of energy storage units (ESU). RES-generated power storage in local ESU is an alternative solution for managing the utility grid demand. In addition, to maintain the EV charging demand at the microgrid levels, energy management and control strategies must carefully power the EV battery charging unit. In addition, charging stations require dedicated converter topologies, control strategies, and need to follow set levels and standards. Based on EV, ESU, and RES accessibility, different types of microgrid architecture and control strategies are used to ensure optimum operation at the EV-charging point. Based on the above said merits, this review paper presents different RES-connected architecture and control strategies used in EV-charging stations. It highlights the importance of different charging station architectures with current power converter topologies proposed in the literature. In addition, a comparison of microgrid-based charging station architecture with its energy management, control strategies, and charging converter controls are also presented. The different levels and types of charging stations used for EV charging, in addition to controls and connectors used, are also discussed. An experiment-based energy management strategy was developed to control power flow among the available sources and charging terminals for the effective utilization of generated renewable power. The main motive of the EMS and its control is to maximize the usage of RES consumption. This review also provides the challenges and opportunities in EV-charging, and parameters in selecting appropriate charging stations.

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Effect of leakage inductance on solar panel based multiple output inverter for induction heating system

Bhaumik

Sadhu

2022

Microsyst Technol

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Unidirectional voltage converter for battery electric vehicle ultrafast charger

Cited by 6 publications

References 6 publications

The resistive ground fault of PWM voltage inverter in the EV charging station

The resistive ground fault of PWM voltage inverter in the EV charging station

Electric Vehicles Charging Stations’ Architectures, Criteria, Power Converters, and Control Strategies in Microgrids

Effect of leakage inductance on solar panel based multiple output inverter for induction heating system

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