Design of a near unity power factor single phase trapezoidal AC power supply for hybrid fiber/coax network

This paper presents the design and implementation aspects of a single-phase trapezoidal AC power supply based on a one-cycle reset integral control technique for hybrid fiber/coax telecommunication network applications. A performance-based comparison of various PWM techniques demonstrates the superiority of the proposed control approach. A detailed design procedure to select and rate the components of the system is illustrated by means of a design example. Further, the control circuit implementation details are also presented. Finally, the performance of the proposed topology is evaluated, experimentally, in terms of input power factor, input THD and efficiency