A Power Factor Corrected SMPS with Improved Power Quality for Welding Applications

2015 ◽  
Vol 16 (2) ◽  
pp. 181-193
Author(s):  
Swati Narula ◽  
Bhim Singh ◽  
G. Bhuvaneswari ◽  
Rahul Pandey
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Input Power ◽  
Boost Converter ◽  
Weld Bead ◽  
Input Current ◽  
Line Load ◽  
Loop Control ◽  
Current Limit ◽  
Wide Range

Abstract This paper presents the analysis, design and implementation of a power factor corrected Arc Welding Power Supply (AWPS) with a boost converter at the front end and three full-bridge (FB) converters connected in parallel at the load end. The modular arrangement of the FB converters offers several meritorious features like usage of power devices with comparatively lower voltage and current ratings, ease of power expandability, easy maintenance, etc. The boost converter operates in continuous conduction mode minimizing the input current ripple and leading to the lowest RMS current thereby improving the input power quality. Individual control loops are designed for each power stage. A dual loop control scheme is employed to incorporate over-current limit on the proposed AWPS which ensures excellent weld bead quality. The proposed AWPS is implemented to validate its performance over a wide range of line/load variations. Test results confirm its fast parametrical response to load and source voltage variations and over-current protection leading to improved welding performance and weld bead quality. The system is found to perform extremely well with very low input current THD and unity power factor, adhering to international power quality norms.

Design and Simulation of PFC Converter for Brushless SRM Drive

2016 ◽  
Vol 7 (3) ◽  
pp. 625 ◽  
Author(s):  
M. Rama Subbamma ◽  
V. Madhusudhan ◽  
K.S.R Anjaneyulu
Keyword(s):  
Power Factor ◽  
High Efficiency ◽  
Industrial Applications ◽  
Input Power ◽  
Boost Converter ◽  
Air Conditioner ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Bridge Rectifier ◽  
Speed Response

In most of the industrial applications, Switched Reluctance Motor (SRM) is mainly employed due to the reasons like having low maintenance and high efficiency. SRM consists of windings only on its stator, but would not have any windings on rotor thus having very simple construction. The available supply is AC. But AC cannot be directly supplied to SRM when used for air-conditioner application which is employed in this paper. Also power factor in the system needs to be corrected when using a SRM drive. Thus AC supply is fed to power factor correction (PFC) converter which is Buck-Boost converter here in this paper. The output of the PFC converter is fed to SRM through a simple asymmetrical converter. This PFC circuit consists of a simple diode bridge rectifier with Buck-Boost DC-DC converter. A suitable control circuit was proposed to control the input power factor under various loading conditions. This paper gives analysis of SRM drive for air-conditioner application with Buck-Boost converter based PFC circuit. A Matlab/simulink based model is developed and simulation results are presented. Simulation is carried out for different speed response.

Simulation Study of PFC Boost Converter Based on Predicted Average Current Control

2012 ◽  
Vol 462 ◽  
pp. 738-742 ◽  
Author(s):  
Man Yuan Ye ◽  
Song Li
Keyword(s):  
Power Factor ◽  
Control Strategies ◽  
Harmonic Distortion ◽  
Input Power ◽  
Boost Converter ◽  
Current Control ◽  
Simulation Software ◽  
Voltage Control Strategy ◽  
Average Current ◽  
Average Current Control

Introduced to predict average current control PFC Boost converter structure, and analyzes its operating principle, the average current control strategies equation is given by derivation. And a model of predict average current control PFC Boost converter is gained using Matlab Simulink simulation software and SimPowerSystems toolbox. Simulation results show that the predicted average current control PFC Boost converter with control circuit is simple and reliable, high input power factor, anti-interference ability, current harmonic distortion, etc, and is forecast to average voltage control strategy for the active power factor correction provides a novel, simple and feasible control methods.

scholarly journals Design and Implementation of an Active Clamped Full Wave Quasi Resonant ZCS Boost Converter

2019 ◽  
Vol 8 (2S5) ◽  
pp. 66-72
Keyword(s):  
Power Factor ◽  
Output Voltage ◽  
Closed Loop ◽  
High Efficiency ◽  
Voltage Regulation ◽  
Boost Converter ◽  
Switching Frequency ◽  
Closed Loop Control ◽  
Loop Control ◽  
Full Wave

This paper presents a closed loop control of an active-clamped full-wave quasi-resonant boost converter with zero-current-switching (ZCS) for power factor correction. Possibility to incorporate higherswitching frequency and has some potency to reduce switching losses. Power factor improvement and high efficiency is achieved with a constant output voltage and DC output voltage is regulated by using closed loop control .The concept of the proposed switchingscheme results lesser switching loss, higher efficiency, possibility to have higher switching frequency, and has potential to reduce converter's conducted EMI. This paper also presents voltage regulation using closed loop system and the simulation results are verified.

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