A study on the operation characteristics of PFC at instantaneous power interrupt

Recently, there have been increasing demands for high power factor and low harmonic distortion in the current drawn from utility. The harmonic limits imposed by international standards. It needs the PFC techniques in order to reduce line current harmonics and comply with the standards. The average current control method that is the most proper PFC control method in a switching power supply of middle and high power has been used mostly to PFC control method. However, the switching device of PFC circuit has frequently destructed at power return after instantaneous power interrupts. Therefore, this paper has verified the cause of this problem and proposed the solution through simulation and experiment.