This paper deals with a generic methodology to evaluate the magnetic parameters of contactless power transfer systems. Neumann’s integral has been used to create a matrix method that can model the magnetics of single coils (circle, square, rectangle). The principle of superposition has been utilised to extend the theory to multi-coil geometries such as double circular, double rectangle and doub...

This report describes the design, construction and test results of an inductively coupled battery charger for robot power supplies. The system should be capable of charging several robot batteries at once from a contactless charging station. The charger should be capable of providing different charging conditions to several different kinds of battery at once. The system should be capable of cha...

Biometric authentication has been found to be an effective method for recognizing a person’s identity with a high confidence. In this field, the use of palmprint represents a recent trend. To make the palmprint-based recognition systems more user-friendly and sanitary, researchers have been investigating how to design such systems in a contactless manner. Though substantial effort has been devo...

We developed and evaluated different textile-based inductive coils for near-field wireless power transmission. The technology uses electromagnetic induction the contactless transfer of electrical energy. Therefore, we investigated various methods attachment conductive materials on a material production based QI standard. Afterwards, were examined due to their specific quality characteristics. T...

The enhanced Radio-Frequency Identification (RFID) technology called Near Field Communication (NFC), is a standards-based wireless communication technology. Passive NFC devices, such as contactless smart cards use NFC to communicate with other devices without any physical connection, or an internal battery source, deriving power inductively via the radio field generated by the NFC reader device...

The authors propose “Disk-repeater” as a new structure alternative to the conventional resonator repeater. Disk-repeater has a simple structure comprised of just copper plates and wire, non-resonant structure. First, coupling coefficients are measured as functions of disk diameter and wire length to characterize the basic performance of Disk-repeater. It is explained by several experimental evi...