A Development of the Fractional Order Capacitor for Wireless Power Transfer in Electric Vehicle Charging Application.
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Project details
Start date: 01/10/2023
End date: 30/09/2024
Abstract
At present, there is an awareness of the world's energy and environmental problems. In addition, the demand for energy consumption is higher. High cost of petroleum power affected has affected to the manufacturing sector, transportation systems, and public utilities of the country. For this reason, the use of electric vehicles has a tendency to increase. It is also a response to the Carbon Neutrality policy. For this reason, the development of infrastructure systems to support the expansion of the number of electric vehicle users is necessary. The most popular charging method is to plug-in the cable directly which is limited in terms of installation space and may not be able to install outdoors or use while raining. In addition, cable clutter is a limitation of the installation. This leading to the development of wireless power transfer (WPT) systems. At present, it has been developed continuously and the efficiency of WPT system is slightly lower than the power transmission through the plug-in.
The limitation of WPT for electric vehicles or wireless charging for electric vehicles is the large of misalignment position of the transmitter and receiver conditions which will not be able to maintain the current on the secondary side or the electric vehicle side. The secondary current will decrease according to the misalignment position. The compensation circuit is introduced to compensated this poor magnetic coupling due to the misalignment position. There are 4 types of basic compensation circuits that are commonly used, namely series-parallel circuit (SS), series-parallel circuit (SP), parallel-series circuit (PS), and parallel-parallel circuit (PP). The Constant current (CC) or constant voltage (CV) properties, both or either may occur at different frequencies which is fixed only under one of the coil positions. If the expected position moves away The primary capacitor must be replaced to compensate for the same current gain.
In this research project, the idea was to dynamically adjust the capacitor value. By the application of the Fractional Order Circuit, it acts as a virtual capacitor. The capacitance can be adjusted while conducting current. The fractional-order components are not yet standard market-oriented components, but various fractional-order capacitors and fractional-order inductors have been manufactured in the laboratory. As a result of this, the fractional-order capacitorscan improve the actual resistance and reactance, resulting in advantages such as
• Able to maintain constant current conditions and can withstand more extreme vertical and horizontal misalignment conditions.
• Adjust the total system impedance to optimize charging efficiency.
• Quality factor can be adjusted in order to cause or not to occur bifurcation phenomena. All of these can be controlled from the primary side.
It can be seen that fractional order circuit application technology or the use of fractional order capacitors is an new issue and new research problem that is very useful with uncertain system. It is also compatible with other dynamic systems as well.
Keywords
- ตัวเก็บประจุอันดับเศษส่วน
- เทคโนโลยีการอัดประจุไร้สาย
- เรโซแนนซ์อันดับเศษส่วน
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