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Dissertations / Theses on the topic 'Power correction'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Amarasinghe, Kanishka A. "Resonance mode power supplies with power factor correction." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/23672.

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There is an increasing need for AC-DC converters to draw a pure sinusoidal current at near unity power factor from the AC mains. Most conventional power factor correcting systems employ PWM techniques to overcome the poor power factor being presented to the mains. However, the need for smaller and lighter power processing equipment has motivated the use of higher internal conversion frequencies in the past. In this context, resonant converters are becoming a viable alternative to the conventional PWM controlled power supplies. The thesis presents the implementation of active power factor corre

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2

Xie, Manjing. "Digital Control for Power Factor Correction." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34258.

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This thesis focuses on the study, implementation and improvement of a digital controller for a power factor correction (PFC) converter. The development of the telecommunications industry and the Internet demands reliable, cost-effective and intelligent power. Nowadays, the telecommunication power systems have output current of up to several kilo amperes, consisting of tens of modules. The high-end server system, which holds over 100 CPUs, consumes tens of kilowatts of power. For mission-critical applications, communication between modules and system controllers is critical for reliability. Inf

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3

Yeh, Thomas. "Analysis of power factor correction converters /." Online version of thesis, 1992. http://hdl.handle.net/1850/11220.

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4

Williams, David. "Active power decoupling for a boost power factor correction circuit." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59145.

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During AC-DC conversion, the ripple power at the input of the converter must be filtered from the output. This filtering can be easily done by placing a capacitor on the DC bus. For systems with power output of hundreds of Watts or more, this capacitor must be quite high to effectively perform the filtering, and in order to be cost effective, an aluminum electrolytic capacitor (Al e-caps) needs to be used. The lifespan of Al e-caps is notoriously short, so for long lifespan systems, their use is not advisable. Film capacitors have longer lifespans than Al e-caps but are more expensive on a co

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5

Niezrecki, Christopher. "Power factor correction and power consumption characterization of piezoelectric actuators." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/42619.

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A piezoceramic actuator used for structural control behaves electrically as a nearly pure capacitance. When conventional amplifiers are used to drive these actuators, the current and voltage is close to 90 degrees out of phase. This causes the power factor (PF) of the load to be close to zero and results in excessive power requirements. This thesis reports the results of a study of the following question: What effect does applying power factor correction methods to piezoceramic actuators have on their power consumption characteristics? A subproblem we explored was to detennine the qualitative

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6

Qian, Jinrong. "Advanced Single-Stage Power Factor Correction Techniques." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30773.

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Five new single-stage power factor correction (PFC) techniques are developed for single-phase applications. These converters are: Integrated single-stage PFC converters, voltage source charge pump power factor correction (VS-CPPFC) converters, current source CPPFC converters, combined voltage source current source (VSCS) CPPFC converters, and continuous input current (CIC) CPPFC converters. Integrated single-stage PFC converters are first developed, which combine the PFC converter with a DC/DC converter into a single-stage converter. DC bus voltage stress at light load for the single-stag

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7

Jiang, Yimin. "Development of advanced power factor correction techniques." Diss., Virginia Polytechnic Institute and State University, 1994. http://hdl.handle.net/10919/53609.

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Three novel power factor correction (PFC) techniques are developed for both single-phase and three-phase applications. These techniques have advantages over the conventional approaches with regard to the converter efficiency, power density, cost, and reliability for many applications. The single-phase parallel PFC (PPFC) technique was established. Different from the conventional two-cascade-stage scheme, the PPFC technique allows 68% of input power to go to the output through only one time high frequency power conversion, but still achieves both unity power factor and tight output regulation

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8

Chan, Weng Hong. "Harmonic reduction and power factor correction in low power supply system." Thesis, University of Macau, 2002. http://umaclib3.umac.mo/record=b1445817.

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9

Tan, Benjamin H. "A Novel Arc Welding Power Supply with Improved Power Factor Correction." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2199.

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This paper presents the design and development of a novel Arc Welding Power Supply utilizing a modified two-switch forward converter topology. The proposed design improves the power quality by improving power factor to near unity and reducing total harmonic distortion. State space analysis of the proposed circuit showed that the circuit followed a boost-buck input output relationship. Simulation of the circuit was first implemented in LTspice to verify the functionality of the new topology. Hardware implementation of the proposed design was built on a scaled-down prototype for a proof-of-conce

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10

Jones, Kevin David. "Harmonic distortion correction using active power line conditioners." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA300873.

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11

Zhang, Jindong. "Advanced Integrated Single-Stage Power Factor Correction Techniques." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26480.

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This dissertation presents the in-depth study and innovative solutions of the advanced integrated single-stage power-factor-correction (S2PFC) techniques, which target at the low- to medium-level power supplies, for wide range of applications, from power adapters and computers to various communication equipment. To limit the undesirable power converter input-current-harmonicâ s impact on the power line and other electronics equipment, stringent current harmonic regulations such as IEC 61000-3-2 have already been enforced. The S2PFC techniques have been proposed and intensively studied, in or

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12

Anand, Aniket. "Power factor correction in switched reluctance motor drives." Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8125.

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13

Clark, Colin William. "Digital control techniques for power quality improvements in power factor correction applications." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42799.

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The prevalence of standards and recommended practices to meet harmonic current limits has gained, and continues to gain, momentum over recent years. To meet these requirements, power electronic rectification devices are necessitated along with their specialized control techniques. A popular power electronic circuit to obtain low-harmonic input current is the boost power factor correction (PFC) converter, and with the advent of digital control, powerful control techniques to meet these harmonic current limits are possible. The first contribution is a detailed guide to the conversion of an analo

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14

Barbosa, Peter Mantovanelli. "Three-Phase Power Factor Correction Circuits for Low-Cost Distributed Power Systems." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28651.

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Front-end converters with power factor correction (PFC) capability are widely used in distributed power systems (DPSs). Most of the front-end converters are implemented using a two-stage approach, which consists of a PFC stage followed by a DC/DC converter. The purpose of the front-end converter is to regulate the DC output voltage, supply all the load converters connected to the distributed bus, guarantee current sharing, and charge a bank of batteries to provide backup energy when the power grid breaks down. One of the main concerns of the power supply industry is to obtain a front-end conv

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15

Gamboa, Gustavo. "REALIZATION OF POWER FACTOR CORRECTION AND MAXIMUM POWER POINT TRACKING FOR LOW POWER WIND TURBINES." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4283.

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In recent years, wind energy technology has become one of the top areas of interest for energy harvesting in the power electronics world. This interest has especially peaked recently due to the increasing demand for a reliable source of renewable energy. In a recent study, the American Wind Energy Association (AWEA) ranked the U.S as the leading competitor in wind energy harvesting followed by Germany and Spain. Although the United States is the leading competitor in this area, no one has been able successfully develop an efficient, low-cost AC/DC convertor for low power turbines to be used by

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16

Durrani, Yamin Qaisar. "Analysis of silicon carbide based semiconductor power devices and their application in power factor correction." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2573.

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Recent technological advances have allowed silicon (Si) semiconductor technology to approach the theoretical limits of the Si material; however, power device requirements for many applications are at a stage that the present Si-based power devices cannot handle. The requirements include higher blocking voltages, switching frequencies, efficiency, and reliability. Material technologies superior to Si are needed for future power device developments. Silicon Carbide (SiC) based semiconductor devices offer one such alternative. SiC based power devices exhibit superior properties such as very low s

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17

Lord, Edward Michael. "Single-stage power factor correction converter topologies for low power off-line applications." Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/15234.

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Since January 2001 it has been necessary for equipment connected to the low voltage public distribution network in Europe and Japan to comply with IEC 61000-3-2. The regulation IEC 61000-3-2 specifies the level of current that can be drawn for particular harmonics. Much equipment today is fitted with a Switch Mode Power Supply (SMPS) at its input to interface between the line voltage and internal low voltage electronics. This SMPS must not only convert the line voltage, but also ensure that the input current to the device meets the IEC regulations. To meet these regulations two methods are nor

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18

Saasaa, Raed. "A single-stage interleaved resonant power factor correction converter." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59199.

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Applications requiring DC voltages vary widely, from low power, such as LED lighting, to high power, as in industrial motor drives and battery chargers. Accordingly, a unified power architecture for all applications is not practical for efficiency, size and cost optimization. The use of LED lighting system became popular due to its many advantages. The new outdoor applications such as street and flood lighting require high power (i.e. >200 W) in contrast to the low power existing LED drivers. Generally, the conventional architecture of AC/DC converters consists of two main stages; The first is

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19

Mathew, Jimson. "Design techniques for low power on-chip error correction." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492442.

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As integrated circuit density increases, digital circuits characterized by high operating frequencies and low voltage levels will be increasingly susceptible to faults. Furthermore, it has recently been shown that for many digital signature and identification schemes an attacker can inject faults into the hardware and the resulting incorrect outputs may completely expose their secrets. On-chip error masking techniques such as error correction could be one of the options to mitigate the above problems. To this end, this thesis presents a framework of techniques to design error circuits.

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20

George, Mark S. "Power factor correction using a boost quasi-resonant converter." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41901.

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<p>A steady-state analysis of a quasi-resonant zero current boost converter is performed in its application to a single-phase power factor correction circuit. The known closed-form expressions are used to design the boost converter and the multiloop control circuit. The operating characteristics are simulated by using PSPICE and are experimentally verified. Considerations for a practical design are based upon hardware operating at a maximum of 1 megahertz, with a 115 VRMS input, 200 VDC and 100 watt output.</p><br>Master of Science

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21

Wall, Simon Robert. "Control of switched-mode power converters." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362966.

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22

Zhao, Yiqing. "Single Phase Power Factor Correction Circuit with Wide Output Voltage Range." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/35764.

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The conventional power factor correction circuit has a fixed output voltage. However, in some applications, a PFC circuit with a wide output voltage range is needed. A single phase power factor correction circuit with wide output voltage range is developed in this work. After a comparison of two main power stage candidates (Buck+Boost and Sepic) in terms of efficiency, complexity, cost and device rating, the buck+boost converter is employed as the variable output PFC power stage. From the loss analysis, this topology has a high efficiency from light load to heavy load. The control syst

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23

Landin, Per. "Digital Baseband Modeling and Correction of Radio Frequency Power Amplifiers." Doctoral thesis, KTH, Signalbehandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-94762.

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Aspects related to behavioral modeling and correction of distortions for radio frequency (RF) power amplifiers (PAs) are treated in the thesis. When evaluating the performance of a behavioral model it is important to, first of all, use an evaluation criterion, and second, make sure that the criterion actually tells something about the behavior one wishes to describe. This is used in the weighted error spectral power ratio (WESPR) criterion by means of a frequency dependent weighting function. When the parameters of the models are estimated a suitable error criterion should likewise be used.

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24

Ahmed, Saeed. "Controlled on-time power factor correction circuit with input filter." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-11072008-063637/.

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25

Kalpaktsoglou, Dimitrios. "Power factor correction for stand-alone wave energy conversion buoys." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519591.

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26

Zhang, Yaping. "High-power, high-brightness laser diodes with distributed phase correction." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246369.

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27

Zhang, Jindong. "Study and Improvement of Single-Stage Power Factor Correction Techniques." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36938.

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This thesis work focuses on the study and improvement of single-stage power factor correction techniques. The generalized structures of the present pulse-width-modulation (PWM) integrated single-stage power factor correction (PFC) converters are presented. The typical PFC cells in the single-stage PFC converter are identified. After that, the necessary PFC condition is derived and verified to understand the principle of the single-stage PFC converters. As an example, the continuous current mode (CCM) current source single-stage PFC converter is studied. The circuit intuitions and design

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28

Zhou, Chen. "Design and analysis of an active power factor correction circuit." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/53729.

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The design of an active-unity power factor correction circuit with variable-hysteresis control for off-line dc-to-dc switching power supplies is described. Design equations relating the boost inductor current ripple to the circuit components selection and circuit performance arc discussed. A computer-aided design program (CADO) is developed to give the optimal circuit components selection. A 500 watt, 300 volt experimental circuit is built to verify the simulation and analysis results. The control-to-output response of the power factor circuit is verified with the experimental results.

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29

Wu, Tung-Mao, and 吳東懋. "Power Quality Correction." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/12656614688368513651.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>98<br>Due to the fast improvements of the technologies of electric power, all types of electric facilities can satisfy the needs of end users on electricity usage either in livehood or industry. However, power quality is getting worse because of diversified loading which has impacted on power system and electrical facilities. Furthermore, it has caused many problems on electricity usage and extra unnecessary power consumption which have reflected on the increasing maintenance fee and running cost. This thesis will have a series of analyses and examinations on p

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30

Huang, Kuan-Ju, and 黃冠儒. "Development of a Digital Meter with Power Factor Correction Correction Capability." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/d8q927.

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碩士<br>國立臺北科技大學<br>自動化科技研究所<br>105<br>The thesis proposed a digital meter with power factor correction capability when the measured signal contains harmonic components. By using resistor voltage divider circuit and current clamp, the input voltage and current are transferred to small voltage signals which can be processed by the microprocessor. These voltage and current waveform are digitized through an analog-to-digital convertor (ADC). Fast Fourier Transform (FFT) is applied. The Hanning Window and frequency interpolation algorithm is used to correct the voltage and current signals. As the fr

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31

Aydonat, Meric. "Power Grid Correction Using Sensitivity Analysis." Thesis, 2010. http://hdl.handle.net/1807/25415.

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Power grid voltage integrity verification requires checking if all the voltage drops on the grid are less than a certain threshold that guarantees proper circuit operation. This thesis addresses the problem of correcting the grid when some voltage drops exceed this threshold by making minor modifications to the existing design. The method uses current constraints that capture the uncertainty about the underlying circuit behavior to find the maximum voltage drop on the grid, and then to estimate the voltage drop as a function of the metal widths on the grid. It formulates a nonlinear optimizat

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Gau, Yu-Jun, and 高鈺鈞. "Low Cost Simple Power Factor Correction." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/5uw96v.

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碩士<br>遠東科技大學<br>電機工程研究所<br>107<br>This thesis proposes a low-cost simple power factor correction converter architecture. Since the commercially available power factor correctors are upgraded to 400V without lower voltage, considering the low-voltage equipment can be used, it is proposed to achieve high-efficiency circuits at low cost. This article uses the IC ICE2PCS02 in continuous conduction mode as the correction IC for this power factor corrector. This circuit simulates the boost converter simulation in the case of input 70-130Vac boost to output 200V for three different load cases. At hal

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Mishra, Pushanjeet, and Abhisek Kumar Panda. "Load balancing and power factor correction in power distribution system." Thesis, 2014. http://ethesis.nitrkl.ac.in/6395/1/E-8.pdf.

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The project presents an approach for load balancing and power factor correction. First we have considered a three phase grounded load system where the supply is a three phase balanced supply. Before balancing the load and correcting the power factor it is necessary to compensate the neutral current. We propose three schemes for neutral current balancing. After that the system becomes equivalent to ungrounded star connected load. Now to carry power factor correction and load balancing we need to convert the load to delta connected load. Hence we carry out star-delta transformation and we carry

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Fan, Yang-Dian, and 范揚典. "Comparator Implemented Digital Power Factor Correction Rectifier." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/fe7tu6.

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碩士<br>國立高雄科技大學<br>電機工程系<br>107<br>Power factor correction rectifier (PFC) is the front end of most computer power supplies. Due to the climate change, high efficiency over wide load range is highly demanded in PFCs. This drives digital controller to replace analog controller. Analog to digital converters (ADC) are the essential parts for all digital powers. Some previous researches replace the ADC with a comparator and a counter for measuring the DC value of a rippled signal. Comparator based control does not only reduces system cost, but also eliminates the sampling error of the ADC. For thos

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Dash, Roma. "Power factor correction using parallel boost converter." Thesis, 2011. http://ethesis.nitrkl.ac.in/2462/1/PFC_using_parallel_boost_converter.pdf.

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The increased use of power electronic devices has declined the power quality in terms of introduction of harmonics and lowering of power factor.This is due to their non-linear nature of operation. Hence,power factor correction (PFC) is the need of the hour.This thesis informs about the various PFC methods and focusses on PFC using parallel boost converter in particular. A design of the PFC using parallel boost converter employing average mode control in done and the results so obtained are compared with that of a single boost converter and a rectifier circuit without any PFC circuit.

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Behera, Satyasuranjeet, Sibasis Mohapatra, and Monalisa Bisoi. "Automatic power factor correction by microcontroller 8051." Thesis, 2007. http://ethesis.nitrkl.ac.in/4159/1/Automatic_Power_Factor.pdf.

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In the present technological revolution power is very precious. So we need to find out the causes of power loss and improve the power system. Due to industrialization the use of inductive load increases and hence power system losses its efficiency. So we need to improve the power factor with a suitable method. . When ever we are thinking about any programmable devices then the embedded technology comes into fore front. The embedded is now a day very much popular and most the product are developed with Microcontroller based embedded technology.Automatic power factor correction device reads powe

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Yadav, Vinod Kumar. "Power Factor Correction in Ac-Dc System." Thesis, 2017. http://ethesis.nitrkl.ac.in/8938/1/2017_MT_VKYadav.pdf.

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With the increase in demand of modern advance power electronics devises,there has been a tremendous stress on the utility power quality. The steady growth of use of electronics equipment in various industries and household application has become a significant problem as per the line current harmonic is concerned. Their adverse effects on the power system are instability problem,the increase in reactive power demand , the neutral current magnitude increase and becomes the cause of overheating of transformers and induction motors, as well as the dreadful conditions of system voltage waveforms. D

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Hsu, Yu-chun, and 許毓群. "Implementation of a Digital DC Power Supply with Power Factor Correction." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/44114013949569299375.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>96<br>The thesis implements a digital DC power supply with power factor correction. The hardware circuit includes a power factor correction circuit and a phase-shift full-bridge circuit. In the thesis, a UC3854 is used to control the power factor of the input source. In addition, a TMS320LF2407A is used to execute the closed loop control algorithms. The detailed principles and design methods are included. Finally, a DC power supply with 48V/864W, 0.99 power factor, satisfactory EN-61000-3-2 Standards is implemented. Experimental results can validate the theoretical a

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Kurma, Sai Mallika. "Topological issues in single phase power factor correction." Thesis, 2007. http://ethesis.nitrkl.ac.in/4305/1/Topological_issues_in_single_phase_power.pdf.

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The equipment connected to an electricity distribution network usually needs some kind of power conditioning, typically rectification, which produces a non-sinusoidal line current due to the nonlinear input characteristic. With the steadily increasing use of such equipment, line current harmonics have become a significant problem. Their adverse effects on the power system are well recognized. They include increased magnitudes of neutral currents in three- phase systems, overheating in transformers and induction motors, as well as the degradation of system voltage waveforms. Several internation

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Ku, Chen-wei, and 顧振維. "Design of Robust SEPIC Power Factor Correction Circuits." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/x6phvx.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>95<br>This thesis mainly studies the active power factor correction circuit using a new AC/DC Single Ended Primary Inductance Converter (SEPIC). For power factor correction, inductor current is operated in the continuous conduction mode. First of all, the converter is analyzed by state space averaging method. Furthermore, the operational principle of PFC circuit with PI control law is analyzed. A good power factor system is then developed by time-domain and frequency-domain analysis. A classical PFC circuit with PI control law has low power factor when light load.

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Wu, Chen-chia, and 吳振嘉. "Study of Active Power-Factor Correction Controller Circuits." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/74243596431118058324.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>93<br>This thesis aims at investigating the technologies of the active power-factor correction (PFC) circuit. The system originally in the article is based on a boost converter circuit as the structure, the control method is to adopt the average current mode. We doesn’t only narrate the circuit principle of the systematic circuit in the article but also use the OrCAD PSpice A/D software to simulation. Finally, we implemented make a prototype circuit and verified the proposed method. The experimental result shows that it can reach the goal for the power-factor corre

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Cheng, Kai-fang, and 鄭凱方. "Design and Modeling of Power Factor Correction Circuits." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/16884200876201526098.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>93<br>This thesis aims to investigate an active power factor correction (PFC) circuit and its mathematical model, in order to develop a reliable and efficient simulation platform. By using the PI controller, we can control the inductor current and the output voltage of the boost converter. Finally, we constructed the circuit and analyzed the results to verify that our mathematical model is valid.

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Lan, Yi-Meng, and 藍義孟. "CCM Single-Stage Power Factor Correction Electronic Ballast." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/99552950824506979014.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>92<br>This thesis presents a continuous-current-mode (CCM) single-stage power factor correction (PFC) electronic ballast, which is a combination of a boost-type PFC network and a DC/AC inverter to allow CCM operation for the PFC inductor in the boost-type PFC network. Among the PFC techniques proposed in recent years, in general, the discontinuous-current-mode (DCM) single-stage PFC electronic ballasts have such drawbacks as high electromagnetic interference (EMI), high current stress, and high switching and conduction losses. 　　The PFC capacitor of the developed

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Ikriannikov, Alexandr. "New Developments in Single Phase Power Factor Correction." Thesis, 2000. https://thesis.library.caltech.edu/6104/1/Ikriannikov_a_2000.pdf.

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<p>Power Factor Correction (PFC) is a necessary feature of many AC/DC Power Electronics products. The issues of increasing the value of the Power Factor (PF) and increasing efficiency of transferring the power in such applications motivated this thesis.</p> <p>Input rectification is needed for the most topologies in AC/DC applications for these topologies to perform however, it is pretty much one of the main causes of distortions and power losses. Diode bridge is also one the hottest components of PFC, which is an important issue in terms of thermal management.</p> <p>New approach for Po

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Wu, Hsiang-Yu, and 伍翔榆. "Battery Balancing Charger with Interleaved Power Factor Correction." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/68157200208396427624.

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碩士<br>國立彰化師範大學<br>電機工程學系<br>104<br>An interleaved battery balancing charger with power factor correction for two series-connected batteries is proposed in this thesis. The developed balancing charger is composed of a two-phase interleaved buckboost converter and a dual-output balancing charging circuit. The interleaved buckboost converter is operated in discontinuous conduction mode for power factor correction. The voltage and current of each battery are sampled and fed back to a micro-controller unit. The dual-output balancing charging circuit would be controlled with constant-current / const

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Wu, Rong-hui, and 吳榮輝. "DESIGN OF TWO-STAGE BOOST POWER FACTOR CORRECTION." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/84559969850444277906.

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碩士<br>大同大學<br>電機工程學系(所)<br>97<br>ABSTRACT This thesis presents the problem with respect to the dual boost technique of the power factor correction ( PFC ) application. In the PFC a series problem will occur when the PFC is worked in single boost ( only one section_PFC bus is 400V ) even in low mains input, it will then generate a low mains voltage of switching loss on the PFC MOSFET to reduce the efficiency in low mains input . Therefore, In order to prevent this issue happened, we need to change the design concept from single boost to two-stage boost which can improve the efficiency when the

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Che, Lin-Wei, and 林維哲. "Intelligent energy-saving clothes dryerwith power factor correction." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/49166780854980985719.

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碩士<br>崑山科技大學<br>電機工程研究所<br>100<br>The core of this paper is based on intelligent energy-saving clothes dryer with power factor correction. And design the boost power factor correction converters, BLDC motor speed control drive system and temperature control of the drive system. The power supply uses the boost converter structure and adopts average current control method to complete the active power calibration purposes. It meets the regulations of international current harmonics wave. In drying technology, a new energy-saving automatic drying control methods improved from original patent is de

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Wu, Yi-Wei, and 吳亦瑋. "Study of Digital Controller for Power Factor Correction." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/28346693759425565290.

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碩士<br>中原大學<br>電機工程研究所<br>100<br>【Abstract】 Power supply is still based on analog control IC as the main controller, the advantage of a low cost. The circuit is relatively simple. Fast response; but usually only to provide specific control functions, simple user interface, not suitable for operation in the complex power system integration, and control loop compensation is not easy to adjust. In recent years, with the rapid development of digital signal controllers, the digitization of the power system is the trend of the future development of power design, power management, and multi-function

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Tsai, Hsien-Yi, and 蔡憲逸. "Novel Soft-Switching Bridgeless Power Factor Correction Circuits." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/84640922552273594209.

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博士<br>國立臺灣大學<br>電機工程學研究所<br>99<br>Power factor correction (PFC) has become almost a must for off-line power applications nowadays. Despite intensive research in the past decade, this is still a hot-research topic among power electronic field because of the “green” push for the future electric power applications. About ten years ago, there was a PFC power-stage configuration named” Bridgeless” reported. In this configuration, the diode bridge conventionally used PFC applications can be removed and therefore resulting in lower conduction power loss for the applications. The main focus of this di

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Guo, Jia-Lin, and 郭家菱. "Bridgeless Interleaved Buck Converter for Power Factor Correction." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6yy57v.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>106<br>This thesis studies the active power factor correction. In terms of converters, this thesis proposes a novel bridgeless interleaved buck converter for power factor correction, and uses digitalized average current control method to control the AC input voltage in positive half-cycle and negative half-cycle to achieve power factor correction. The interleaved architecture not only controls simplicity, but also can effectively reduce the component current stress at high output power, improve the high current resistance of the power components, the overlarge volu

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