Design of a coil geometry for generating magnetic field to evaluate biological effects at 85 kHz

Abstract

In recent years, the use of induction‐heating systems has increased and wireless power transmission (WPT) systems have been discussed. These applications are installed close to a human body. Therefore, it is important to discuss the effects of alternating magnetic fields and to evaluate electromagnetic interference. This paper discusses the design procedure of a magnetic field generator to evaluate the electromagnetic interference at 85 kHz that is being studied in WPT systems for EV and HEV. The magnetic field generator presented in this paper consists of a single‐phase inverter circuit that uses SiC‐MOSFETs and an air–core inductor that is used as the coil for generating a magnetic field. In particular, this paper shows that the coil used for generating magnetic field needs to reduce the winding voltage to generate higher magnetic flux. In addition, this paper presents the design procedure of the proposed coil structure that can satisfy some limited conditions. The experimental results of the proposed system rated at 82 kHz and 100 A are presented.

In vivogenotoxicity of high-intensity intermediate frequency magnetic fields in somatic cells and germ cells

“…We modified the IF-MF exposure system used in previous studies [ 9 ] and constructed a new exposure system [ 10 ]. This system consisted of a power supply, inverter, capacitor and solenoid coil equipped with a chiller for cooling ( Fig.…”

“…A schematic of the IF-MF exposure system was provided by Matsubara et al. [ 10 ]. The system has an air-core coil to generate IF-MF.…”

“…We developed the high-intensity and short-term IF-MF exposure system in stages to overcome the difficulty of this process. Our existing IF-MF exposure system [ 9 ] has been improved and refurbished [ 10 ]. To investigate the biological effects of small animals on the above exposure scenarios, we need an IF-MF exposure system that mimics such IF-MF exposure.…”

Modelling, Simulation and Investigation of Wireless Power Transfer in Square-loop Chip at UHF Band for Medical/Biomedical Charging

“…The loops parameters are determined by considering the following equations, peak value V L of coil terminal voltage is expressed by [13].…”

“…The coil structure, inductance and flux density at the loop central point, targeting the optimal loop structure for the laboratory generation of magnetic field. Inductance of magnetic generation loop consists of internal inductance L in and external inductance L e and the interwinding mutual inductance M. the equations below explain the analysis parameters to determine the internal inductance, wiring length and the permeability of the vacuum [13].…”