Wireless Charging of a Supercapacitor Model Vehicle Using Magnetic Resonance Coupling

Abstract

This paper discusses the basic considerations and development of a prototype demo system for the wireless charging of supercapacitor electric vehicles, which uses magnetic resonance coupling. Considering future ubiquitous wireless vehicle stationary and dynamic charging facilities, supercapacitor could be an ideal device to store a reasonable amount of electrical energy for a relatively short period of time. The prototype system includes all the major functional components for an electric vehicle’s powertrain and wireless charging system including coils for energy emitting and receiving, a FPGA PWM input generation board, high frequency DC/AC inverter and AC/DC rectifier circuits, an on-board supercapacitor module, sensors for SOC level measurement and charging position detection, etc. All the components are integrated into a model electric vehicle. The prototype system well demonstrates the idea of the fast and frequent wireless charging of on-board supercapacitors. Promising results from initial experiments are explained; while further investigations, optimized design of components and a system-level optimization are needed.

Efficient wireless charging system for supercapacitor-based electric vehicle using inductive coupling power transfer technique

“…The values of K and M decrease with the increase in misalignment and distance between coils. The plot for M and K is shown in Figure 8 that is similar because of the relation between K and M, as shown in equation (10).…”

“…We have used supercapacitors instead of batteries because these could be more rational than batteries due to quick and incessant wireless charging and discharging without chemical reactions; large number of recharge cycles life; quick and high effective charge/discharge, precise voltagebased state-of-charge (SOC) measurement; a wide working temperature scope of -40°C to + 70°C and little spillage current and ecologically benevolent without utilizing substantial metal for its structure material. [9][10][11] Wireless power transmission (WPT) is a rapidly adopted technique in the transportation sector and various technical approaches are being used for its implementation in which different variations of certain parameters, for example, a number of coils, the shape of coils, compensation topologies, inverter design, and frequency controls are being implemented to get maximum power and efficiency. [12][13][14][15] A detailed review of recent trends in WPT techniques is presented in Sun et al, 16 in which the authors discussed different applications of WPT for EVs.…”