• Study Resource
  • Explore
    • 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
Electricalengineerin.. - Engineers Institute of India
Electricalengineerin.. - Engineers Institute of India

200400045 VECTRON ELEKTRONIK MANUAL
200400045 VECTRON ELEKTRONIK MANUAL

one channel microstepping motor driver board - Inter
one channel microstepping motor driver board - Inter

Proposed Title: Multi-Function Battery Energy Storage Systems
Proposed Title: Multi-Function Battery Energy Storage Systems

NOCAP LongPlay Headphone Amplifier
NOCAP LongPlay Headphone Amplifier

... negative voltage. Thus, the internal amplifiers provide outputs referenced to Ground and the losses are reduced which helps to increase the battery life. In this NOCAP configuration, the two external heavy coupling capacitors can be removed. It offers significant space and cost savings compared to a ...
Tektronix MBD: Products > High€Voltage Differential Probes P5200
Tektronix MBD: Products > High€Voltage Differential Probes P5200

... floating voltages up to 5,600 V (DC + pk AC) safely and has a bandwidth up to 50 MHz. It is supplied with two sizes of hook tips and has an overrange visual and oral indicator which warns the user when they are exceeding the linear range of the probe. It can be used with Tektronix TEKPROBETM interfa ...
Functions Batch Controller–Presetable Counter DigiFlow 514
Functions Batch Controller–Presetable Counter DigiFlow 514

NP40 - Lumel
NP40 - Lumel

... Power quality according to EN-50160 standard or user-defined limit (registration time from 2 hours to 7 days). Registration of user-defined parameters in the 8GB internal memory (frequency of registration from 1 second up to 60 minutes, registration time from 2 h up to 1 year). Ethernet interface fo ...
Print - SDMO
Print - SDMO

GPON OLT SFP Transceiver
GPON OLT SFP Transceiver

photo voltaic microinverter control for grid-connected
photo voltaic microinverter control for grid-connected

... order to obtain a sufficient stability margin, a zerophase low-pass filter is often incorporated rather than the unity gain. This can be realized by cascading a ...
ECE Laboratory Equipment Proficiency
ECE Laboratory Equipment Proficiency

Data Analysis Example Assume that you have the following circuit
Data Analysis Example Assume that you have the following circuit

... Average C 1.05222E-06 ...
HiTek Power Technical Datasheet
HiTek Power Technical Datasheet

... and electron beam systems within a compact assembly. The design utilises IGBT technology operating at 20kHz to provide superior performance, coupled with an unrivalled resistance to damage from surges and arcs. The power converter uses a unique non-dissipative snubber which keeps the main power IGBT ...
HW2 solution
HW2 solution

... luminance signal. Second, the RGB images are correlated and sending them directly is wasteful of bandwidth. By converting the RGB representation to the YIQ representation, the resulting three components are less correlated and together they occupy narrower bandwidth. Finally, the human eye is less s ...
Design of a C-Band CMOS Class AB Power Amplifier for an Ultra
Design of a C-Band CMOS Class AB Power Amplifier for an Ultra

... important is a high output power value of typically around 20 dBm and higher. Furthermore, the architecture has to offer sufficient gain. Looking on the current climate debate, energy efficiency becomes increasingly important. Finally, the architecture should be producible with a low cost standard I ...
package ruggedness absolute maximum ratings features description
package ruggedness absolute maximum ratings features description

... Typical device performance under Class AB mode of operation and RF burst conditions of 32!s on/18!s off x 48, repeated every 24ms with VDD = 50V and IDQ = 100mA. ...
Bipolar Transistor
Bipolar Transistor

design_review
design_review

GeekTeches GM328B Transistor tester
GeekTeches GM328B Transistor tester

... Support potentiometer test,It can not distinguish between the middle pin and this pin When the potentiometer is adjusted to one end of the potentiometer. 12. Minimum resistance resolution 0.01 ohm, Maximum resistance 50M ohms. 13. Can measure a capacitor, Capacitance range 25pf~100mF, Resolution 1pF ...
Al-Balqa` Applied University Faculty of Engineering Technology
Al-Balqa` Applied University Faculty of Engineering Technology

... Investigation of three phase Squirrel Cage induction motor Variable Frequency Drive System Student’s Name: ...
SICES` parallel controllers
SICES` parallel controllers

... MPtM+MSB ...
- VanAmps
- VanAmps

... controls and how they affect the output, use small adjustments until the sound you are after is achieved. The Sole-Mate’s dwell control is very responsive so using large changes in the controls range will prevent the user to hear the important subtleties that this control can contribute to the overa ...
A new type electromagnet controller for isotope ratio mass
A new type electromagnet controller for isotope ratio mass

... current is can be made in a continuous manner by setting of the width of the current pulses. That width can be adjusted by means of precise potentiometer (voltage divider) or by a computer controlled reference voltage. The only drawback – typical for all switching controllers – is a little modulatio ...
Energy Transmission System For Artificial Heart
Energy Transmission System For Artificial Heart

... To determine input voltage Vs of the converter, the curves of Gv are simulated for the designed transformer as shown in Fig. 3.1. Although Q slightly varies as the coupling coefficient varies, Q is about eight at full load (48 W) and about two at light load (12 W). Region III is extended for the sma ...
< 1 ... 1041 1042 1043 1044 1045 1046 1047 1048 1049 ... 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