power factor improvement


Improving the PF can maximize current-carrying capacity, improve voltage to equipment, reduce power losses, and lower electric bills. The simplest way to improve power factor is to add PF correction capacitors to the electrical system. PF correction capacitors act as reactive current generators.

Dead-zone digital controller for improved dynamic response of power factor preregulators
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This paper presents a simple control method for improvement of dynamic responses in a digitally controlled low-harmonic rectifier with power factor correction (PFC). The controller uses a fixed or self-adjusting dead zone in analog-to-digital conversion to eliminate the

Design of a single-phase rectifier with improved power factor and low THD using boost converter technique
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The method of using Boost type of converter was proposed for a 300W single-phase rectifier in this paper. By designing the necessary techniques and methodology, the overall Power Factor (PF) and Total Harmonic Distortion would be improved to the expectation. The cause

High performance boost PFP ( power factor pre-regulator) with an improved ZVT (Zero Voltage Transition) converter
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In this paper, the conventional ZVT PWM Boost converter is improved to minimize the switching loss of the auxiliary switch using the minimum number of the components. To reduce the switching loss and EMI noise, the saturable core and the parallel capacitor

3-Phase Power Factor Correction using Vienna rectifier approach and modular construction for improved overall performance, efficiency and reliability
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While applications for 1-Phase PFC are now familiar and prevalent, the same is not the case with 3-Phase PFC. Many equipments using kilowatts of power from 3-Phase mains should be candidates of 3-Phase power factor correction, because several advantages ensue, both

Analysis of modified diode bridge rectifier with improved power factor
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The subject of this paper is theoretical and simulation investigation of modified diode rectifier with improved power factor assembled according to proposition presented in . The modified diode rectifier with additional power electronic valves used for modelling of

A control circuit small wind turbines with low harmonic distortion and improved power factor
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This paper presents the application of average current mode control to reduce the THDi and increase the PF in a Three-Phase Boost Rectifier driving a small wind turbine. It is used as input stage of small wind turbines with permanent magnet synchronous generators

Improved Power Factor Controller for Wind Generator and Applications.
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This journal paper presents a vector control (VC) of an emerging brushless doubly-fed reluctance (BDFRG) technology for large wind turbine applications. The BDFRG has been receiving increasing attention due to its low operation and maintenance costs afforded by

A Compact Rectifier Stage with an Improved Power Factor
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The electrolytic capacitors used in rectification are usually bulkier and more expensive than the other components composing a power converter. Therefore, the compactness and cost of topologies are often sacrificed. This paper presents a new simple approach to reduce the

A multi-level switching amplifier with improved power efficiency for analog signals with high crest factor
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This paper describes a new multi-level switching amplifier concept, targeting increased power efficiency for analog signals with a very high crest factor . Interesting application fields include audio power amplifiers or line drivers in ADSL and VDSL equipment. Calculations

Improved Power Factor Correction for BLDC Drive Using Fuzzy Logic Controller
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This paper presents a DCM based PFC ( Power Factor Correction) based BL (Bridgeless)- Single phase single ended primary inductance converter (SEPIC) converter fed BLDC (Brushless DC) motor drive. The proposed converter topologies are implemented to provide

A Study of AC/DC Converter with Improved Power Factor and Low Harmonic Distortion
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AC/DC converters are widely used in industrial applications. Input AC voltage is rectified and filtered using filtering circuit which consists of large electrolytic capacitors. These capacitors draw a large amount of current and the efficiency of the converter system decreases

Improved Parallel Boost Power Converter for Power Factor Correction
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The main objective of the study is to analysis and design parallel boost power converter for power factor correction using an active filtering approach by implementing single-phase soft- switching technique with an active snubber circuit. Zero voltage transition to turn ON and

Improved Closed Loop Controlled PFC Boost Converter Fed Dc Drive with Reduced Harmonics and Unity Power Factor
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Abstractingle-phase switch mode ac-dc converters are being used as front end rectifiers for a variety of applications due to advantages of high efficiency and efficiency and power density. However, these classical converters draw non-sinusoidal input ac currents which

Electric Supply System With Improved Efficiency Through Power Factor Correction
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Proper and efficient use of electricity safeguards our country from the extinction of power resources. The above saying enlightens the necessity to reduce losses during transmission, lessen the EB billing cost and enhance the efficiency of the system supplying the loads. The

An AC LED Driver with Improved Total Harmonic Distortion and Power Factor
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AbstractIn this paper, A Bridgeless Boost converter proposed for improving power factor (PF) and total harmonic distortion (THD) of an AC LED driver. The proposed topology is integration of Boost and Buck-Boost converter. In conventional LED driver there were a bridge rectifier with

An improved Valley-Fill passive Power – Factor -Correction circuit for electronic ballast
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The paper deals with an improvement of the Valley-Fill (VF) Power Factor Correction (PFC) circuit for Electronic Ballast (EB), which reduces input harmonic current emissions in compliance with EN 61000-3-2 standard and at the same time keeps an output voltage

An Improved Zero-Voltage-Transition Technique in a Single-Phase Active Power Factor Correction Circuit
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This paper presents an improved Zero-Voltage-Transition Technique (ZVT-Technique) in a single-phase active power factor correction circuit based on a dc-dc boost converter topology and operated in a continuous-inductor-current mode with fixed-switching frequency

Hybrid Shunt Active Power Filter with Improved Power Factor and Lower Harmonics
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The electronic industry faces the harmonic distortion as one of the main problem affecting the power quality. Harmonics generated due to non sinusoidal current consumption due to the prevailing non linear loads, affect the power quality. Since the non linear electronic

Improved Power Factor Related Welding Power Supply Utilizing Zeta Converter
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A power factor corrected single stage, two-switch isolated zeta converter is proposed for arc welding. This modified zeta converter is having two switches and two clamping diodes on primary side of high frequency transformer (HFT). This, in turn, results in reduced switch

PWM Based Improved Power Factor Three Phase Rectifier Using Hysteresis Controller
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This paper presents hysteresis current controlled Pulse Width Modulated (PWM) converter. IGBT is used as switching device as it has high switching speed. PWM Rectifiers offer promising and high end performance for ac to dc conversion needs of the industry, customer
Improving the PF can maximize current-carrying capacity, improve voltage to equipment, reduce power losses, and lower electric bills. The simplest way to improve power factor is to add PF correction capacitors to the electrical system. PF correction capacitors act as reactive current generators.




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