Development of a magnetic-field generator at 20 kHz using a Voltage-Source Inverter for biological research

This paper presents an alternating magnetic-field generator at 20 kHz for biological research using a single phase inverter and a series LC resonant circuit. Both single coil and multiple coil magnetic-field generators are designed and their effectiveness is confirmed by analytical and experimental results. These results demonstrate that the magnetic-field generator can produce 8 mT at a frequency of 20 kHz at the midpoint of the single-coil with low distortion of magnetic flux waveform. Additionally, the multiple-coil magnetic-field generator produces the distribution of uniform magnetic flux over a larger volume than the single-coil magnetic-field generator.