Abstract
New PWM technique for the current fed type PWM Converter is proposed. As the control variables, the instantaneous active and reactive power are used instead of the line current. They are proportional to the instantaneous active and reactive current vector. The switching state of the PWM converter is given by the selection method of the appropriate current vector among the 7 kinds of the current vectors with the zero current vector. The active current is controlled by the zero current vector and the reactive current depends on the kind of the selected current vector. These variables are basically controlled by PWM switching from two kinds of the hysteresis comparator. In addition to this, the compensation of the filter circuit can be automatically obtained by the PWM control based on the active and reactive current detected from the source current.
In this paper, the principle of the PWM technique for the current source PWM converter is proposed. Then, some simulation results are shown. After that, the feasibility of the system is verified by experimental results.
