Induction heating (IH) technology is nowadays the heating technology of choice in many
industrial, domestic, and medical applications due to its advantages regarding efficiency …

Wireless power transfer systems, particularly those based on inductive coupling, provide an
increasingly attractive method to safely deliver power to biomedical implants. Although there …

Epoxy resin (EP) is a typical and widely used insulating material for medium-frequency
transformers (MFTs). The dielectric loss of EP is one of the key variables in the design and …

Resonance-based wireless power delivery is an efficient technique to transfer power over a
relatively long distance. This technique typically uses four coils as opposed to two coils used …

An isolated three-port bidirectional dc-dc converter composed of three full-bridge cells and a
high-frequency transformer is proposed in this paper. Besides the phase shift control …

The number and diameter of strands to minimize loss in a litz-wire transformer winding is
determined. With fine stranding, the AC resistance factor can be decreased, but DC …

This study presents an approximate model for multi-strand wire winding, including litz-wire
winding. The proposed model is evaluated using Dowell's equation. The model takes into …

In order to achieve the highest efficiency of wireless power transfer (WPT) systems, the
quality factor of the resonant coil should be as high as possible. Due to the skin effect and …

This paper describes the ac power dissipation of coils as well as their self-capacitance, self-
resonant frequency, and quality factor Q. In the past, self-resonant frequency was rarely …

For inductive components such as coils, inductors or transformers, litz wires with isolated
strands are used to decrease conduction losses in applications with higher operating …