Design and implementation of multi-frequency magnetic field generator producing sinusoidal current waveform for biological researches

Recently, induction heating systems are being widely used in many applications, and wireless power transmission systems are being introduced into commercially available electrical vehicles. These applications use time varying magnetic fields (under 100 kHz) which are in close proximity of the human body. Therefore, it should be discussed an influence of the time varying magnetic fields around 100 kHz to the human body. This paper presents design and implementation of a magnetic field generator for biological research. While conventional magnetic field generators only produce one frequency component, this paper discusses a multi-frequency range magnetic field generator with frequencies of 200 Hz and 20 kHz. In addition, actual systems with the inverter circuits for the purpose of biological evaluation are presented.