Abstract
A single-phase AC power control circuit generates many harmonic components in the input current and the output voltage and current. These harmonics may cause various problems in the utility's distribution and a load equipment connected to the AC power control circuit.
In this paper, as a reduction method of these harmonics, we propose a compound PWM AC power control circuit system which has greater reduction effect of these harmonics as compared with the conventional PWM control system. In this proposed circuit system, the reduction effect of harmonics is quantitatively clarified by the numerical calculations. Furthermore, the design method of the appropriate constant values of a LC filter inserted to reduce the input current harmonics is described. The reduction effect for the LC product of the filter in this system is also investigated. These simulation results are verified by the experiments.
