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HVDC Technology 1.Introduction The development of HVDC(High
HVDC Technology 1.Introduction The development of HVDC(High

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

... represents reactive power. Accordingly, by adjusting q-axis current, the reactive power drawn with three-phase rectifier can be cancelled. With performing this strategy, the total harmonic distortion (THD) of grid would be significantly diminished. If a selective harmonic elimination is required, we ...
PDF-4UP
PDF-4UP

... Single number (ED, ED2) often misleading for real designs ...
GD75232 MULTIPLE RS-232 DRIVERS AND RECEIVERS
GD75232 MULTIPLE RS-232 DRIVERS AND RECEIVERS

... Receiver low-level output current, IOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating ...
AD8133 - Analog Devices
AD8133 - Analog Devices

... Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operat ...
emergency power – storage batteries
emergency power – storage batteries

... Portable Generator for Emergency Power – These generators go from 1 KW to a practical weight limit of about 5 KW. Typical fuel is either gasoline or diesel. Residential Standby Systems – These generators can be wired to automatically start within 20 seconds of a commercial power grid failure. These ...
Understanding the Test Technique and Interpretation of Results
Understanding the Test Technique and Interpretation of Results

... The power-factor and watts values provide information about the quality of the insulation. The power factor measured at low voltage, below corona-inception voltage, is an indication of the inherent dielectric losses of the insulation system and its general condition. An acceptable power factor assur ...
properties of electrons apparatus
properties of electrons apparatus

Moving Charges: Current
Moving Charges: Current

synchronous balanced operation of open
synchronous balanced operation of open

SMPS AC/DC Reference Design User`s Guide
SMPS AC/DC Reference Design User`s Guide

... BLOCK DIAGRAM A conventional SMPS must implement PFC if it draws more than 75 watts from the AC Mains. The PFC circuitry draws input current in phase with the input voltage, and the Total Harmonic Distortion (THD) of the input current should be less than 5% at full load. The PFC provides a fixed DC ...
Evaluation Board User Guide UG-230
Evaluation Board User Guide UG-230

... circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentati ...
P84025
P84025

... Wheelock products must be used within their published specifications and must be PROPERLY specified, applied, installed, operated, maintained and operationally tested in accordance with these instructions at the time of installation and at least twice a year or more often and in accordance with loca ...
Short-Circuit Isolation
Short-Circuit Isolation

development of a dual sensor heat control system
development of a dual sensor heat control system

DS1083L 16MHz to 134MHz Spread-Spectrum Clock Modulator for LCD Panels General Description
DS1083L 16MHz to 134MHz Spread-Spectrum Clock Modulator for LCD Panels General Description

... dithers the output clock about its center frequency at a user-selectable magnitude. The user is required to cycle power to the device each time there is a change in the input frequency, for the PLL to lock correctly. This ensures proper output frequency and dither rate. The desired spread-spectrum m ...
Installation instructions
Installation instructions

... codes for the territory of final use. For example for USA, in line with National Electrical Code and for Canada in line with Canadian Electrical Code. They should be installed in a dry position, not in direct sunlight and where the ambient temperature is reasonably stable and will not be outside the ...
Fairford Sizing Generators for Soft Starters
Fairford Sizing Generators for Soft Starters

... voltage distortion since it is evident that the generator size is quite sharply increased over that  needed to start the motor alone.  It also shows that distortion consideration only comes into play  when the motor being started represents the major part of the total connected load.  Throughout thi ...
Pinnacle® Plus+ Pulsed-DC Power Supplies
Pinnacle® Plus+ Pulsed-DC Power Supplies

... • Wide voltage range—singletap wide impedance range • High-power operation ...
DRV601 数据资料 dataSheet 下载
DRV601 数据资料 dataSheet 下载

... DC input-blocking capacitors are required to be added in series with the audio signal into the input pins of the DRV601. These capacitors block the DC portion of the audio source and allow the DRV601 inputs to be properly biased to provide maximum performance. These capacitors form a high-pass filte ...
Solid State Transformer (SST)
Solid State Transformer (SST)

design_review
design_review

... The audio-DSP interface consists of a passive low pass anti-aliasing filter and an audio codec. The low pass filter will have a cutoff frequency of 3 kHz, corresponding to the maximum frequency of the human voice. Band-limiting the incoming signal will reduce the sampling rate necessary to meet the ...
Built in test-mode in tachometer of Fords with LCD Instrument panels
Built in test-mode in tachometer of Fords with LCD Instrument panels

... new instrument cluster. EE Displays the hexadecimal value for EE level (used when requesting assistance from hotline). If alternating flashes of FAIL and EE level are displayed replace instrument cluster. dt Displays hexadecimal coding of final manufacturing test date (used when requesting assistanc ...
001638APL_suppl
001638APL_suppl

... supported by Figure A2. For a 50 µm-ID nozzle under voltages ranging from 1.1 to 2 kV, the flow rate for drop formation ( Q ) and the filling rate of the cone ( Qc ) are approximately equal. For nozzles with larger inner diameter, the conical base emits a jet before a Taylor cone is completely forme ...
LeeVincent2012.doc - Berkeley Robotics
LeeVincent2012.doc - Berkeley Robotics

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Buck converter



A buck converter is a voltage step down and current step up converter.The simplest way to reduce the voltage of a DC supply is to use a linear regulator (such as a 7805), but linear regulators waste energy as they operate by dissipating excess power as heat. Buck converters, on the other hand, can be remarkably efficient (95% or higher for integrated circuits), making them useful for tasks such as converting the main voltage in a computer (12V in a desktop, 12-24V in a laptop) down to the 0.8-1.8V needed by the processor.
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