A Scheme for Improving Input Current Zero-Crossing Distortion of Single-Phase Power-Factor-Correction Converters

2006 ◽  
Author(s):  
Xiaohui Qu ◽  
Xinbo Ruan
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Power Factor Correction ◽  
Input Current ◽  
Zero Crossing ◽  
Current Zero

Analysis of a Novel Single Phase AC-DC CUK Converter with Low Input Current, THD to Improve the Overall Power Quality Using PFC

2018 ◽  
Author(s):  
Shadman Sakib ◽  
Ahmed Jawad Kabir ◽  
Shajal Khansur ◽  
Jewel Rana
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Closed Loop ◽  
Power Factor Correction ◽  
Performance Comparison ◽  
Open Loop ◽  
Input Current ◽  
Low Input ◽  
Analysis And Design ◽  
Cuk Converter

In this paper, analysis and design of a novel single phase AC-DC CUK converter circuit has been proposed where Power Factor Correction (PFC) controller scheme has been used in order to obtain better performance than conventional converters. Closed loop technique is applied to the bridgeless converter in order to achieve low input current, Total Harmonic Distortion (THD) at input AC mains along with near unity power factor. Performance comparison between open loop and closed loop of the proposed converter is made without filtering. The problems arise with open loop is sufficiently minimized by using power factor correction controller. The performance comparison between proposed and conventional CUK AC-DC converter operating in Continuous Conduction Mode (CCM) is made based on circuit simulations using PSIM softwere.

scholarly journals Microcontroller Based Automatic Power Factor Correction for Single-Phase Lagging and Leading Loads

2020 ◽  
Vol 10 (6) ◽  
pp. 6515-6520
Author(s):  
B. M. Rija ◽  
M. K. Hussain ◽  
A. M. Vural
Keyword(s):  
Power Factor ◽  
Distribution Systems ◽  
Single Phase ◽  
Reactive Power ◽  
Power Factor Correction ◽  
Low Cost ◽  
Major Power ◽  
Zero Crossing ◽  
Phase Angle Difference ◽  
Electrical Distribution Systems

Power Factor (PF) correction is a major power quality function in electrical distribution systems. This paper proposes a low-cost Automatic Power Factor Correction (APFC) system to increase the PF of both lagging and leading single-phase loads. The Arduino Mega 2560 microcontroller was used to calculate the PF and activate the relays that connect the capacitor/inductor banks to the load in parallel. Thus, the required capacitive or inductive reactive power was produced by the APFC system by automatically connecting the capacitor/inductor banks to the load in parallel. The APFC system can also measure and display many electrical parameters of the load such as the rms voltage, the rms current, PF, and the real, reactive, and apparent power on an LCD display. Two zero-crossing detector circuits are used to find the phase angle difference between voltage and current waveforms of the load. The measurement ability of the APFC system was tested for resistive, inductive, and capacitive loads with two different sizes. The measurement results were compared with the measurements of a commercial digital power meter and a measurement error of less than 8.0% was observed. The PF correction ability of the APFC system was verified for inductive and capacitive loads with two different sizes. The experiments show that the PF increased to close to unity for both lagging and leading loads.

scholarly journals Analysis to Input Current Zero Crossing Distortion of Bridgeless Rectifier Operating under Different Power Factors

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2447 ◽  
Author(s):  
Jinqi Liu ◽  
Yizhou Liu ◽  
Yuan Zhuang ◽  
Cong Wang
Keyword(s):  
Power Factor ◽  
Harmonic Distortion ◽  
Input Current ◽  
Operating Characteristics ◽  
Unity Power Factor ◽  
Drive Mode ◽  
Zero Crossing ◽  
Piecewise Function ◽  
Simulation And Experiment ◽  
Current Zero

The principles and operating characteristics of bridgeless rectifiers under different power factors are discussed with emphasis on analyzing the input current distortion. Firstly, two driving modes are analyzed and compared. Based on the results of comparison it is concluded that the complementary drive mode is a better choice in terms of reducing the current distortion when bridgeless rectifier operates on non-unity power factor. Then, the mechanism causing input current zero-crossing distortion is analyzed. The input current during the distortion is expressed by the piecewise function when a bridgeless rectifier operates under complementary drive mode. Based on the piecewise function, the harmonic analysis is performed. Besides, the relationships between the input current Total Harmonic Distortion (THD) and the filtering inductance, the input current amplitude and the power factor angle are also investigated, which is useful when designing bridgeless rectifiers and selecting the corresponding parameters. Finally, the accuracy of the theoretical analysis is verified through the simulation and experiment.

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