Development of two FET neutral point type down inverter

Abstract

The electronic ballast of the Two-converter system which combined the converter circuit and the inverter circuit with the input waveform improvement for fulfilling an IEC standard in a lighting field is developed. However, this system had many faults. Then, at this laboratory, from before, the neutral points boost converter which has improved the above-mentioned problem was developed, and it applied to the electronic ballast, and has contributed to the lighting field. However, although the above-mentioned converter was a boost type, it had the problem of a reason. Then, this report newly develops a neutral point type down converter circuit, and improves a problem.