Simple and efficient design and control of the single phase PWM rectifier for UPS applications

This paper deals with simple design and control of single-phase PWM rectifier which plays an important task in new commercial and low cost uninterruptible power supplies (UPSs). Firstly, a simple and fast single-phase phase locked loop (PLL) is proposed which is one of the main parts of control system. Besides, an efficient design of passive elements of rectifier is proposed to reduce size and cost of hardware system. In addition, due to several benefits of digital signal processors (DSPs) such as fast calculation capability, various peripherals and serial communications, a DSP-based digital controller is adopted to control the rectifier. Several simulation and experimental results are provided to verify the effectiveness of the proposed design manner and control system.