• 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
Evaluates:  MAX2754 MAX2754 Evaluation Kit General Description Features
Evaluates: MAX2754 MAX2754 Evaluation Kit General Description Features

... This section lists the recommended test equipment to verify operation of the MAX2754. It is intended as a guide only, and some substitutions are possible. ...
Distribution voltage regulators
Distribution voltage regulators

... Why the interest in voltage? ...
TT2140LS
TT2140LS

Operational Manual
Operational Manual

... carefully checked against the list to ensure that no items are missing, damaged or discarded with the packing materials. In the event that any items are missing or damaged, contact ...
LM1084 5A Low Dropout Positive Regulators (Rev. E)
LM1084 5A Low Dropout Positive Regulators (Rev. E)

... excluding Protection circuitry OUTPUT VOLTAGE The LM1084 adjustable version develops at 1.25V reference voltage, (VREF), between the output and the adjust terminal. As shown in figure 2, this voltage is applied across resistor R1 to generate a constant current I1. This constant current then flows th ...


S i 7 0 0 7 - A 1 0 H S
S i 7 0 0 7 - A 1 0 H S

050 Electronic Tuning Fork Example Project
050 Electronic Tuning Fork Example Project

... Looking at the results table above, my system operated over the specified voltage range. The quiescent supply current was higher than I was anticipating – the 555 timer data sheets suggest that the operating current of a 555 timer are 10mA at 15V, so I assumed that the overall quiescent current woul ...
EMI4184 数据资料DataSheet下载
EMI4184 数据资料DataSheet下载

... are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marki ...
DRV8837,DRV8838 - Texas Instruments
DRV8837,DRV8838 - Texas Instruments

... The DRV883x family of devices is an H-bridge driver that can drive one dc motor or other devices like solenoids. The outputs are controlled using either a PWM interface (IN1 and IN2) on the DRV8837 device or a PH-EN interface on the DRV8838 device. A low-power sleep mode is included, which can be en ...
Operational Amplifiers
Operational Amplifiers

Control of Transient Power during Unintentional Islanding of
Control of Transient Power during Unintentional Islanding of

... adjust the power set-points to match the load demand instantaneously. As a result circulating power can flow from the inverters with higher power set-points to inverters with lower set-points. It is important to note that by using common antiislanding strategy, the period from grid failure until the ...
XAPP946 - 适用于 Virtex-4 RocketIO MGT 的开关电源
XAPP946 - 适用于 Virtex-4 RocketIO MGT 的开关电源

... to use relatively quiet power supplies such as linear regulators. Easy to implement and low in cost, linear regulators typically don't generate noise great enough to affect transceiver performance, and they can filter noise from upstream supplies. However, their efficiency can be very low, especiall ...
RA60H4452M1 数据资料DataSheet下载
RA60H4452M1 数据资料DataSheet下载

... 2.RA series products (RF power amplifier modules) and RD series products (RF power transistors) are designed for consumer mobile communication terminals and were not specifically designed for use in other applications. In particular, while these products are highly reliable for their designed purpos ...
Audio Power Amplifier
Audio Power Amplifier

... • To improve performance, bypass capacitors are needed on power supply • Eliminates possible oscillations ...
Crown International, Inc. 1 Xs1200 Circuit Description and Service
Crown International, Inc. 1 Xs1200 Circuit Description and Service

Single-Shot Capture using the DSO-101 Oscilloscope
Single-Shot Capture using the DSO-101 Oscilloscope

... the timebase. The input signal was applied to this oscillator in such a way as to pull the oscillation frequency into sync with the input signal. The pull-in range is quite limited, that is, the frequency of the multivibrator must be approximately equal to the frequency (or some integer multiple of ...
MAX889 High-Frequency, Regulated, 200mA, Inverting Charge Pump General Description
MAX889 High-Frequency, Regulated, 200mA, Inverting Charge Pump General Description

... The MAX889 high-current regulated charge-pump DCDC inverter provides up to 200mA. It features the highest available output current while using small capacitors (Table 1). The three versions available differ in their switching frequencies (f OSC ) — MAX889R/ MAX889S/MAX889T with fOSC = 500kHz/1MHz/2M ...
Sensored Field Oriented Control of 3
Sensored Field Oriented Control of 3

... The goal of the FOC (also called vector control) on the synchronous and asynchronous machine is to separately control the torque producing and magnetizing the flux components. The control technique goal is to imitate the DC motor’s operation. The FOC allows you to decouple the torque and the magneti ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,

... Now a days, there is a large scarcity of electric energy in our world and at the same time the demand is also increases. Many distributed power system have been developed to meet this high demand by using renewable energy resources like solar systems, wind energy systems and other distributed energy ...
AN341 - Diodes Incorporated
AN341 - Diodes Incorporated

BD555A1AFV
BD555A1AFV

THE SYSTEM 5000™
THE SYSTEM 5000™

... >> Multiple Bipolar Modes – Micro bipolar for fine and precise coagulation. Macro bipolar for more energy intensive bipolar applications ...
AD9754 数据手册DataSheet 下载
AD9754 数据手册DataSheet 下载

... differential output configuration. The current outputs may be tied directly to an output resistor to provide two complementary, single-ended voltage outputs or fed directly into a transformer. The output voltage compliance range is 1.25 V. The on-chip reference and control amplifier are configured f ...
BB ADS831 datasheet
BB ADS831 datasheet

< 1 ... 613 614 615 616 617 618 619 620 621 ... 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 © 2026
  • DMCA
  • Privacy
  • Terms
  • Report