Authors:Úrsula do Carmo Resende, Thiago Henrique Gonçalves Mello Pages: 1 - 7 Abstract: With the exponential growth of IoT (Internet of Things), Industry 4.0, and electrical vehicles, there is a growing need for flexible energy sources. Wireless energy transfer is becoming increasingly important in this context, as it enables physical devices to be more flexible and allows for the simultaneous powering of multiple loads. This study presents a wireless energy transfer system that uses solenoid coils in inductive resonant mode. The system is configured in a point multipoint setup, with a circular transmitter coil and two identical circular receiver coils placed inside the transmitter. We use mathematical modeling to develop circuit theory models and identify the most efficient topology for the system. In addition, we propose a simple and cost-effective self-oscillating electronic converter design with two switches for system supply. Our numerical and experimental results demonstrate that the proposed system is viable and functional, achieving a power output of 1.7 W and efficiency of 27%. PubDate: 2024-02-29 DOI: 10.5281/zenodo.10727727 Issue No:Vol. 6, No. 1 (2024)
Authors:Budihardja Murtianta, Demas Sabatino, Ihsan Fuadi, Ananditya Galih Samudra, Jevan Farica Pages: 8 - 13 Abstract: Electric Vehicles (EVs) as one alternative of clean transportation now has a growing market. To enhance the ecosystem of the EVs we must reduce dependencies on limited number of public batteries swapping stations or public battery charging station. This research aims to create a switched-mode power supply that specific to charge EVs battery using households electricity power especially in Indonesia, which is commonly limited to 900VA. Since electric motorcycle commonly using 80V/20Ah battery this charger design must follow the maximum rated voltage and current of the LiPo batteries. To be more specific our charger equipped with active power factor correction rectifier, with efficiency >97% and power factor >99%, and LLC dc-dc converter, with efficiency >90%, to convert input voltage 220VAC (rms) into output voltage 80VDC. The charger also designed to be deliver 800W power into the batteries, so it will not surpassed the limited household power PubDate: 2024-05-28 DOI: 10.5281/zenodo.11371870 Issue No:Vol. 6, No. 1 (2024)
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