• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
FPGA Implementation of Maximum Power Point Tracking
FPGA Implementation of Maximum Power Point Tracking

... Solar energy is one of the important source of renewable energy.The sun radiates large amount of energy which is enough to satisfy the need of whole world.Solar energy is used for providing heating,cooling,light and for electricity.One of the important technology is Photovoltaic (PV),by photoelectri ...
Digital Control of Permanent Magnet Synchronous Motors
Digital Control of Permanent Magnet Synchronous Motors

... As with most motors the synchronous motor (SM) has two primary parts. The non-moving is called the stator and the moving — usually inside the stator — is called the rotor. Synchronous motors can be built in different structures. To enable a motor to rotate two fluxes are needed. One from the stator ...
Description
Description

... • DC voltages are usually lower, and therefore safer (e.g., 24V). • DC inputs are very fast, AC inputs require a longer on-time. • DC voltages can be connected to more electrical systems. • AC signals are more immune to noise than DC. • AC power is easier and less expensive to supply to equipment. • ...
LM26003/LM26003Q 3A Switching Regulator with High Efficiency
LM26003/LM26003Q 3A Switching Regulator with High Efficiency

... The LM26003 device is a current mode PWM buck regulator. At the beginning of each clock cycle, the internal high-side switch turns on, allowing current to ramp-up in the inductor. The inductor current is internally monitored during each switching cycle. A control signal derived from the inductor cur ...
K193 – Smart SLA Battery Charger
K193 – Smart SLA Battery Charger

... Do not insert the IC into the socket – this will be done after setting the output voltage (see below). POWER SUPPLY SPECIFICATION The minimum DC input voltage is set by the charging voltage (14.7) plus 3V regulator voltage drop plus the voltage drop (0.7) across the input and output diodes. This wor ...
MPM3606A - Monolithic Power System
MPM3606A - Monolithic Power System

... please refer to PCB guideline recommendations. For best results, connect to PGND with copper and vias. Supply Voltage. IN supplies power to the internal MOSFET and regulator. The MPM3606A operates from a +4.5V to +21V input rail. It requires a low-ESR, and lowinductance capacitor to decouple the inp ...
e) Motors
e) Motors

... /* set direction ...
PDF
PDF

... This paper tends to develop for protection for costly appliances which require three-phase AC supply for operation. Failure of any of the phases or sudden change in voltage makes the appliance prone to erratic functioning and may even lead to failure. Hence it is of paramount importance to monitor t ...
High Power NPN Bipolar Power Transistor
High Power NPN Bipolar Power Transistor

... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
High-Speed, Single-Supply, Rail-to-Rail
High-Speed, Single-Supply, Rail-to-Rail

... OPA353 series extends 100mV beyond the supply rails. This is achieved with a complementary input stage—an N-channel input differential pair in parallel with a P-channel differential pair (see Figure 2). The N-channel pair is active for input voltages close to the positive rail, typically (V+) – 1.8V ...
Go Picture These!
Go Picture These!

System reliability
System reliability

... Reactive power plays an important role in EHV transmission system planning and hence forecast of reactive power demand on an area-wise or substation-wise basis is as important as active power forecast. …………………… ……………………………………………… This will require compilation of past data in order to arrive at reaso ...
Overview - Yaskawa
Overview - Yaskawa

... Application Precautions The ideal three-phase power supply for a VFD is a grounded-Y configuration. Closed-delta configurations are also acceptable. ...
DAC8734EVM User Guide
DAC8734EVM User Guide

... The Auxiliary Analog Input pin can be further protected from over-voltage and over-driving conditions. A Schottky diode (D1) can be installed to protect the DAC8734 from an input over-voltage condition. An op amp buffer is placed on the VMON output to limit the current that passes through the pin. T ...
SPS-5 and SPS-10 Technical Sales Bulletin
SPS-5 and SPS-10 Technical Sales Bulletin

... Inputs (1-8 IN C) Eight, two position un-pluggable terminal blocks. When IN & C are shorted together, the like number output relay will energize. Each relay can also be energized by an open collector that is common to the control power, sinking 20ma for each input. Each of the C’s (common) are conne ...
Lab Title - Chabot College
Lab Title - Chabot College

... K1. Define peak-to-peak voltage, period, and frequency for AC waveforms K2. Convert peak-to-peak measurements to RMS values K3. Describe the function of the vertical, horizontal, and triggering sections of an oscilloscope S1. Measure peak-to-peak voltages, period, and frequency of AC waveforms S2. M ...
Synchronous Machines A. Preparation Demonstration C. Report B
Synchronous Machines A. Preparation Demonstration C. Report B

... field circuit of the DC Machine to cause it to generate a controllable DC voltage. Adjust the series connected rheostats in the field circuit of the DC machine as necessary to obtain and/or maintain the constant AC Machine input power (200, 450, and 700 Watts per phase) required for performance of t ...
FEATURES GENERAL DESCRIPTION ADP172 e ADP172 s
FEATURES GENERAL DESCRIPTION ADP172 e ADP172 s

... measurements. A resistor can be used as the load for the regulator. Ensure that the resistor has a power rating that is adequate to handle the power that is expected to be dissipated across it. An electronic load can also be used as an alternative. Ensure that the voltage source can supply enough cu ...
TESTING READINESS REVIEW T I R
TESTING READINESS REVIEW T I R

... must regulate to sample both the measures response integrated GeoPod channels stores the ...
Toll Free: 1-800-967-5540
Toll Free: 1-800-967-5540

motor control
motor control

... Some of the key features may not be obvious from the outside, but upon power-up the system goes into stand-by mode. This has the motor stopped, direction in positive mode and the LCD displaying RPM. Once the Start/Stop button is pressed the motor will start revolving and the LCD will display the cur ...
Bip Transistor 160V 700mA VCE(sat);500mV max. PNP Single PCP
Bip Transistor 160V 700mA VCE(sat);500mV max. PNP Single PCP

Shuswap Amateur Radio Club – Basic Qualification
Shuswap Amateur Radio Club – Basic Qualification

... Regulator ensures a constant output voltage for varying current loads and minor fluctuations of the input voltage ...
Power Requirements - Rockwell Automation Knowledgebase
Power Requirements - Rockwell Automation Knowledgebase

... NOTE: The “I/Q DP-4000” is similar to the “I/Q Data Plus” (Used until late 1997) both electrically (Same Input devices required, although connection points may be different and it provides some extra features) and mechanically (Same mounting dimensions), and it can be used as a direct substitute. 01 ...
Application Note 020 Converting a 1 Form A / 1 Form
Application Note 020 Converting a 1 Form A / 1 Form

... So, substituting these values into formula (1), a resistor value of 700Ω can be calculated. Of course, this value does not take into account any temperature fluctuations or tolerance variations. It is merely for demonstration purposes. To convert this relay to a 1 Form C relay, pins 2 & 3 should be ...
< 1 ... 579 580 581 582 583 584 585 586 587 ... 1202 >

Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report