Last edited by Guran
Sunday, July 12, 2020 | History

2 edition of Input-current shaped AC-to-DC converters found in the catalog.

Input-current shaped AC-to-DC converters

Input-current shaped AC-to-DC converters

semiannual status report

  • 343 Want to read
  • 25 Currently reading

Published by California Institute of Technology, Power Electronics Group, NASA Lewis Research Center, National Technical Information Service, distributor in Pasadena, CA, [Cleveland, Ohio, Springfield, Va .
Written in English


Edition Notes

Other titlesInput current shaped AC to DC converters
SeriesNASA contractor report -- NASA CR-176438
ContributionsLewis Research Center
The Physical Object
FormatMicroform
Pagination1 v
ID Numbers
Open LibraryOL14986997M

Product Title Jeobest Car Power Converter - Car Power Adapter - Ca Average rating: 1 out of 5 stars, based on 1 reviews 1 ratings Current Price $ $ 98 List List Price $ $ and disc arching increments of boost inductor current to shape a sinusoidal input current. Inductor current was controlled by means of PWM controller. The controller accepts two feed back signals, the first is the inductor current and the other is the output voltage of the AC/DC converter. The simulation results of .

  AstroAI AC to DC Converter, 10A/Vto12V DC/W/FT, Car Cigarette Lighter Socket AC/DC Power Supply Adapter Transformer for Inflator, Car Refrigerator, and Other Car Devices out of 5 stars In this paper, the impedance matching characteristics and the analysis of the operational modes of the proposed circuit are presented. The experimental results confirmed that the proposed converter enables a conversion from MHz AC to DC with the sinusoidal input current. In this operation condition, the input impedance is + j Ω.

AC/DC Converter with Active Power Factor Correction Applied to DC Motor Drive 62 Based on (13) for a given input voltage, Fig. 6(a) shows the normalized input current waveform in a half cycle for a change in the turns ratio N3/N1. It can be seen that to reduce the dead time and improve the power factor of File Size: KB. A DC-to-DC converter is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. It is a type of electric power levels range from very low (small batteries) to very high (high-voltage power transmission).


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Input-current shaped AC-to-DC converters Download PDF EPUB FB2

Input-Current Shaped Ac-to-Dc Converters {N'ASa-CE- ) IN POT-CUE BE Fl SHAPED ac TO dc CCNVEETERS Final Beport {California Inst.of Tech.) shape input current cannot also be used to provideFile Size: 1MB. Several methods of shaping the input current waveform in ac-to-dc converters were reviewed.

The simplest method is the LC filter following the rectifier. The next simplest method is the resistor emulation approach in which the inductor size is determined by the converter switching frequency and not by the line input frequency.

The problem of achieving near unity power factor while supplying power to a dc load from a single phase ac source of power is examined.

Power processors for this application must perform three functions: input current shaping, energy storage, and output voltage regulation. The methods available for performing each of these three functions are reviewed.

Input current shaping methods are either. ELG DC to AC Converters Converts DC to AC power by switching the DC input voltage (or current) in a pre-determined sequence so as to generate AC voltage (or current) output.

I DC I ac + V shape between a waveform and its fundamental component 1 2 2 1. 1 on o n V V f File Size: 1MB. There are several solutions to achieve PFC [1]-[2]. The shape of the input current can be further improved by using a combination of input and output filters [3]-[6] In the past, designers have used three passive wave shaping methods to improve the input power factor and reduce total harmonic distortion THD of conventional ac-to-dc rectifiers [7].

The active input current-shaping technique consists of one converter with two outputs: the main output is Input-current shaped AC-to-DC converters book to feed the load, and the auxiliary output is used to shape the input current [ Fig. Example 2: A single-phase diode bridge rectifier has a purely resistive load of R=15 ohms and, VS= sin t and unity transformer ratio.

Determine (a) The efficiency, (b) Form factor, (c) Ripple factor, (d) and, (d) Input power factor. V V V V t d t m dc m 2 sin 1 0 ³ S Z Z S S A RFile Size: 1MB. Generally, We can understand Input’s Alternating current to output’s direct current converts by AC-DC converter easily. AC-DC converters are such common devices that no one pays much attention to them unless they go missing and you can’t get the DC power that you need.

It’s u 3. Thus, the input current can shape in phase with the voltage source and promising high efficiency of PWM converter. Simulation and experimental results are included to verify theoretical analysis. View. Input current shaped ac-to-dc converters. by National Aeronautics and Space Administration NASA.

Kindle $ $ 7. BINZET AC to DC 12V 10A W Power Supply Adapter Converter Regulator, mm x mm DC Plug, 12Volt 10Amp Wall Power Plug for DC12V Flexible LED Strip Lights AbeBooks Books, art & collectibles: ACX Audiobook. correction circuit to shape the input current of the power supply and to meet the power factor and current THD norms such as IEC A power factor correction (PFC) circuit shapes the input current of the power supply to be in phase with the mains voltage and aids to maximize the real power drawn from the mains.

In addition, a PFC front-end. Get this from a library. Input-current shaped Ac-to-Dc converters: semiannual status report. [United States. National Aeronautics and Space Administration.;]. An ac to dc converter is an integral part of any power supply unit used in the all electronic equipments.

Also, it is used as an interface between utility and most of the power electronic equipments. These electronic equipments form a major part of load on the utility.

Generally, to convert line frequency ac to Cited by: Get this from a library. Input-current shaped Ac-to-Dc converters: final report.

[United States. National Aeronautics and Space Administration.;]. The first phase of the converter is a boost converter that will boost voltage from a 12 V battery into 30 V.

Then the 30 V is fed to an inverter that will invert 30 V into 30 Vpk-pk AC signal. Preface from the Author The function of any AC/DC or DC/DC converter module is to meet one or more of the following requirements: i: to match the secondary load to the primary power supply ii: to provide isolation between primary and secondary circuits iii: to provide protection against the effects of faults, short circuit or over heating iv: to simplify compliance with safety, performance or.

Hence, control algorithms of an AC-DC converter have to provide not only a sinusoidal shape of grid current, but also stable operation during transient states in the grid, e.g. voltage dips or. The rectified output voltage waveform of the supply-side rectifier will typically be as shown (left) in Fig.

which shows the potential of the top of the converter (i.e. at left hand end of the inductance) with respect to the bottom of the d.c. a has a substantial ripple at six times the utility frequency, and the average (d.c.) voltage is (V s).

AC to DC Converter for Low Voltage Small Scale Generator DOI: / | Page V V T T i p s i (sin2. /)S The rise time of input current is DT i L V s p i / (7) And the fall time of input current is d T i L V V f s p i /() 0 (8)File Size: 1MB.

Dc-dc power converters are employed in a variety of applications, including power supplies for personal computers, office equipment, spacecraft power systems, laptop computers, and telecommunications equipment, as well as dc motor drives.

The input to a dc-dc converter is an unregulated dc voltage Vg. The converter produces. The converter operates in four modes of operation: Mode I: This mode begins as soon as S1 is turned ON.

There are two current loops in this mode. The voltage across L p is the rectified input-line voltage V rec Because the Buck-Boost Converter is designed to operate at DCM, the inductor current i p that flows through the rectifier diodes, L p, D7 and S1increases linearly from zero with a Author: R Mayuri, K.

Purushotham, Bharathi Rao.A Novel Voltage-Fed AC-DC Full-Bridge Converter Article in PESC Record - IEEE Annual Power Electronics Specialists Conference June with 26 Reads How we measure 'reads'.ALITOVE AC to DC Converter 12V 8A 96W, VV to 12V Power Supply Adapter Car Cigarette Lighter Socket, AC/DC Transformer for Portable Cooler Warmer, Air Compressor, Heated Seat, Other Car Devices out of 5 stars