The Research Of The APFC Circuit In On-line UPS

This paper aims to discuss the online UPS in the active power factor correction circuit of an all-digital research. Digital control technology with the continuous development, an increasing number of control strategies through the digital signal processor (DSP) can be achieved. Digital control is to support the development of key technologies for UPS. Digital control with analog control has many advantages compared to, for example, means control is simpler and more flexible control mode, the output performance of a more stable, there is no zero drift, the stability of the static operating point, can be integrated and small, and so on.In this paper, the average current mode control of active power factor correction technique based on the average current control voltage loop, current loop mathematical model, the design ideas. A digital signal processor-based control circuit. Experimental platform by the main circuit, control circuit and auxiliary power circuit is composed of three parts and so on. Boost converter main circuit topology, control circuitry for the control of the main unit by the TMS320F2407, auxiliary power supply circuit for the control circuit to provide operating voltage of the device.Use of papers in the simulation tool Matlab simulation of the algorithm to verify the correctness of the algorithm for the design of the actual system laid the foundation. In hardware and software has been designed on the basis of the experimental verification through the work of the PFC circuit theory and digital control programs of the feasibility of the design of experimental results show that the good results achieved.