Analysis of Correction of Power Factor by Sin...

Analysis of Correction of Power Factor by Single Inductor Three-Level Bridgeless Boost Converter

Author Name : Ajay Kumar, Sandeep Goyal

ABSTRACT: Energy conservation is the world's most urgent work at present. This study focuses on the research and development of the AC-DC conversion circuit for variable frequency control, which is closely related to human life. It uses the bridgeless rectifier circuit, coupled with the Interleaved Boost and “PFC” (Power Factor Correction) technology to design a high-efficiency AC/DC conversion circuit. In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of −1 to 1.In power system power factor (p.f) is an important factor of continuous quality electrical supply some time it reduces due to some reactive power disorder power factor affected and by hence the quality (voltage and efficiency) also affected. There are many methods to improve the power factor such as capacitor bank, synchronous condenser, thyristor controlled rectifier(TCR) etc. But they have losses problem so a new technique is introduced three level single inductor bridge less boost power factor correction rectifier with voltage clamp property by the MATLAB simulation technique it used bridge less three level boost topology. It consist of two different types of diode, i.e fast diode & slow diode , MOSFET, capacitor & inductor due to use of semiconductor device soft switching it has high efficiency, low device voltage stress as well as high Voltage gain. With the help of MATLAB simulation four modes of operation is processed these are (a).Charging stage in the positive half cycle and (b).discharging stage in positive half cycle (c).Charging stage in the negative half cycle and (d). Discharging stage in negative half cycle and the whole improved power factor supply is obtained in the wave form. And this output is to give the feasible input to the other electrical device such as electrical motor. It can be used in UPS for regular power supply.