• 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
Power over Ethernet: IEEE 802.3af
Power over Ethernet: IEEE 802.3af

... increases the fail safety of the connected devices by the use of an uninterruptible power supply (UPS) on the other hand. PoE is mainly used by terminating equipment which consumes little power. The technology is used typically in IP telephones, cameras or wireless transmission devices such as WLAN ...
Alternating Current (AC) Circuits
Alternating Current (AC) Circuits

... output voltage in secondary coil is greater than input voltage in primary coil Transformer with N2 > N1 ...
Power Supply Sequencing Simplified
Power Supply Sequencing Simplified

... to the correct voltage in a designated amount of time. During the monitoring phase each power supply must remain within designated over- and undervoltage limits. During down-sequencing, each supply must wait its turn (often in a different order from up-sequencing), then power down within a configu ...
Asian Power Electronics Journal
Asian Power Electronics Journal

... The principal function of the inverters is to generate an AC voltage from a DC source voltage. If the DC voltage sources connected in series, it becomes possible to generate an output voltage with several steps. Multilevel inverters include an arrangement of semiconductors and DC voltage sources req ...
PLL400-864AY 5V NARROWBAND PHASE-LOCKED LOOP Features
PLL400-864AY 5V NARROWBAND PHASE-LOCKED LOOP Features

... cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. The information in this publicati ...
SIMOTICS Low-voltage motors - Siemens
SIMOTICS Low-voltage motors - Siemens

HT3213861389
HT3213861389

... the phase of the VCO. Output of the PFD is a measure of the phase difference between its two inputs. The difference voltage is then filtered by the loop filter and applied to the VCO. The control voltage on the VCO changes the frequency in a direction that reduces the phase difference between the in ...
application specific power supplies
application specific power supplies

... A resistor divider from Vcc to ground can be used to charge the capacitor up to Vcc/2 at a relatively slow rate when the power is turned on, minimizing or eliminating the pop. ...
Implementing peak current mode control of a
Implementing peak current mode control of a

... Up to 19 channels of PWM output with configurable automatic dead band Up to 8 of the 19 PWM channels can operate in high-resolution mode with a resolution as low as 150 picoseconds Integrated analog comparator and sSlope compensation reference digital-to-analog converter (DAC), tied directly to PWM ...
Low Noise Amplifier
Low Noise Amplifier

mcor30 technical manual
mcor30 technical manual

CIRCUIT FUNCTION AND BENEFITS
CIRCUIT FUNCTION AND BENEFITS

... increased, lower frequencies will be included, and the peak-topeak value will increase. At low frequencies, temperature drift and thermocouple effects become contributors to noise. These effects can be minimized by choosing components with low thermal coefficients. In this circuit, the main contribu ...
High Power Connector Overview
High Power Connector Overview

... Hirose Electric has developed a wide range of innovative products over a period of 79 years as a specialised connector supplier, and as a result, Hirose have dynamically contributed to customers’ new product developments. The need for internal and external connectivity in the high power market is ra ...
ACS755xCB-130 - Allegro Microsystems
ACS755xCB-130 - Allegro Microsystems

... ▪ Monolithic Hall IC for high reliability ▪ Single +5 V supply ▪ 3 kVRMS isolation voltage between terminals 4/5 and pins 1/2/3 for up to 1 minute ▪ 35 kHz bandwidth ▪ Automotive temperature range ▪ End-of-line factory-trimmed for gain and offset ▪ Ultra-low power loss: 100 μΩ internal conductor res ...
Adjustable Front End Overvoltage Protection Controller with
Adjustable Front End Overvoltage Protection Controller with

... The NCP392A is an overvoltage front end protection and be able to disconnect the systems from its output pin in case wrong input operating conditions are detected, up to +28 V. Due to this device using internal NMOS, no external device is necessary, reducing the system cost and the PCB area of the a ...
AD1580 数据手册DataSheet 下载
AD1580 数据手册DataSheet 下载

... Some confusion exists in the area of defining and specifying reference voltage error over temperature. Historically, references have been characterized using a maximum deviation per degree Celsius, for example, 50 ppm/°C. However, because of nonlinearities in temperature characteristics that origina ...
Product Sheet
Product Sheet

... V I S H AY I N T E R T E C H N O L O G Y, I N C . ...
BD63940EFV
BD63940EFV

... BD63940EFV,BD63960EFV are the ultra simple type that provides the minimum function for driving stepping motor and various protection circuits. As for its basic function, it is a low power consumption bipolar PWM constant current-drive driver with power supply’s rated voltage of 36V and rated output ...
Troubleshooting LED Downlights
Troubleshooting LED Downlights

... • For 10W & 15W Liton –DLV products, consult the charts in the LED Dimming Facts Guide to reference tested maximums by dimmer. • Remove the dimmer from the line to see if the problem is solved. • Change dimmer to one with a higher maximum load. • Split the circuit into multiple loads. ...
EXPERIMENTAL INVESTIGATION Laboratory test # 1/1 Direct
EXPERIMENTAL INVESTIGATION Laboratory test # 1/1 Direct

Homework 7
Homework 7

... The diagram also illustrates how to find the equivalent complex impedance. Note that the phase of the complex impedance of the resistor is 0, the phase of the complex impedance of the capacitor is -90° and the phase of the complex impedance of the inductor is 90°. Supplement. Although it is not aske ...
Very High Frequency Two-Port Characterization of
Very High Frequency Two-Port Characterization of

Model Based-Energy Control of a Solar Power Plant With a
Model Based-Energy Control of a Solar Power Plant With a

• 4- or 8-channel power amp systems—220 Watts RMS per channel
• 4- or 8-channel power amp systems—220 Watts RMS per channel

... Attenuation controls for each channel shall be located on the rear panel. A selection switch shall be provided for each channel on the rear panel to allow the enabling or bypass of a high-pass filter per channel. A gain selection switch shall be provided per channel. A rear panel circuit breaker shal ...
Advanced Mechanical, Electrical and ANNEX I APS12 Technical Teaching Equipment
Advanced Mechanical, Electrical and ANNEX I APS12 Technical Teaching Equipment

... 4. All electrical and mechanical changes done as real industrial system by using six touch screens and two panoramic screens. The APS12 control panels include up to eight screens, six of them are touch. But, What can do the user with all these screens? In a power plant the most important thing is th ...
< 1 ... 697 698 699 700 701 702 703 704 705 ... 1315 >

Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report