کنفرانس بین المللی فناوری و مدیریت انرژی

صفحه اصلی / نهمین کنفرانس بین المللی فناوری و مدیریت انرژی

100% Power Factor Correction Using DCM Control Technique with Software Feedback

نویسندگان :

Salar Mosharkesh Barenji¹

1- K. N. Toosi University of Technology

کلمات کلیدی :

Power Factor Correction،Boost Converter،SMPS،PFC،DCM

چکیده :

The use of diode rectifiers in the primary stage of electronic circuits creates instantaneous currents that result in harmonics, leading to phase discrepancy and reduced power factor. Implementing a boost converter structure at the primary stage, coupled with the proper selection of hardware parameters and the application of an appropriate control algorithm for inductor current regulation, can nullify the phase difference between voltage and current. Thus, the use of suitable hardware and a control algorithm enables power factor correction for AC inputs. Since the output of the boost converter is DC, the type of load on the output does not affect the input power factor. However, to achieve maximum power factor correction, it is essential to thoroughly understand the system's constraints and capacities. Moreover, considering the time-varying nature of the input voltage amplitude, the sampling time, processing time, and the delay in switching devices, it is preferable to employ a control algorithm that corrects the power factor without needing to sample the input voltage waveform. Consequently, the only parameter that needs to be controlled is the output voltage amplitude of the converter, thereby simplifying the control algorithm and eliminating the impact of input noise on the converter. The independence of control parameters from the amplitude and waveform of the input voltage not only maximizes power factor correction but also enhances the system's stability against input noise and supports a broader frequency range for the input voltage.