Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 225 for “"Power Factor"”.
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Power factor correction
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1921.
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Digital Control for Power Factor Correction
… 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 …
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Advanced Single-Stage Power Factor Correction Techniques
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 …
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Development of advanced power factor correction techniques
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 …
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Advanced Integrated Single-Stage Power Factor Correction Techniques
… 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 …
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Development of power factor correction using boost converter circuit
… Texas Instrument (interface), gate driver, power factor correction circuit in boost circuit topology and rectifier circuit, load and sensor are the main parts in this project. Texas Instrument works as the interface communication with MATLAB SIMULINK 2015a to the power factor correction …
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A new unity power factor quasi-resonant induction heater
… heating systems based upon resonant switch mode power converter techniques. The proposed three phase unity power factor induction heating system consists of two stages of power conversions. The important requirements for each stage of the power conversion of a typical induction heating system …
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A single stage power factor corrected AC/DC converter
… for AC/DC converters that require high input power factor has been traditionally implemented by two power stages. In order to provide a cost effective and high density solution for low power applications, this thesis proposes a single stage isolated converter topology designed to achieve a …
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A digital controller for a unity power factor converter
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Power factor correction using a boost quasi-resonant converter
… 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 …
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Design and implementation of a 500 kVAr hybrid power factor
… was to design, build and test a 500 kVA-hybrid power factor/current unbalance correction unit. The unit will be used to reduce the maximum demand and reactive power consumption through power factor correction of large electricity users as well as minimize power disruption and improve power …
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Design and analysis of an active power factor correction circuit
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 …
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Study and Improvement of Single-Stage Power Factor Correction Techniques
… 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 …
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Controlled on-time power factor correction circuit with input filter
An active power factor correction circuit with controlled on-time is proposed. The circuit has a simpler control scheme than the power bc10r correction circuit with hysteresis control, and yet is able to attain high power factor. A very important aspect of this work was the formulation of the …
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Power factor correction and power consumption characterization of piezoelectric actuators
… 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 …
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A single stage full bridge power factor corrected AC/DC converter
… single phase AC/DC converters use a two stage power configuration to provide a regulated DC power supply at high input power factor. Elimination of one of these stages can reduce the cost, weight, size, complexity and increase the overall reliability of this converter. This thesis proposes a …
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