• 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
Interfacing Type K Thermocouples to the Chickadee XL
Interfacing Type K Thermocouples to the Chickadee XL

... being measured, or if the object is non-conductive or not grounded, a ground connection can be made with the grounding jumper shown. If a low resistance ground connection causes ground loops or other electrical problems, a 10K resistor may be used instead of the jumper. In order to span a range of 0 ...
view EM-I Question Bank
view EM-I Question Bank

Preventing HMI and Switch Damage from DC Inductive
Preventing HMI and Switch Damage from DC Inductive

... The diode needs to be placed correctly in the circuit so that during normal operation is it not activated, but during the fly-back state it becomes active and conducts current away from the rest of the circuit and back through the inductor. It should be placed as close to the inductive load as possi ...
DRV8313 2.5-A Triple 1/2-H Bridge Driver (Rev
DRV8313 2.5-A Triple 1/2-H Bridge Driver (Rev

... Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ........................ ...
CPCO - 8000 - 160mm
CPCO - 8000 - 160mm

Determination of Planck`s Constant Using the Photoelectric Effect
Determination of Planck`s Constant Using the Photoelectric Effect

... currents vs. voltages graphs one can conceive of a slightly more direct way of accounting for the effects of back current. If we treat (somewhat erroneously but reasonably) the back current as a constant negative offset on the curve in the high-voltage region of the data, where the current should be ...
RAL Template
RAL Template

3B30 数据手册DataSheet 下载
3B30 数据手册DataSheet 下载

... readily hot-swapped under full power and interchanged without disrupting field wiring. The Analog Devices 3B Series Signal Conditioning Subsystem is designed to easily handle signal conditioning problems in measurement and control applications. Some typical uses are in microcomputer-based data acqui ...
International Research Journal of Applied and Basic Sciences www.irjabs.com
International Research Journal of Applied and Basic Sciences www.irjabs.com

... phase winding and the rotor position is detected from the capacitor voltage rise time. The last one which has an AVR as the controller and uses different driver circuit structure detects the position of the rotor using the voltage phase shifting information. The strategies and their operation are st ...
transmisii pentru transformarea indirectă a miªcării, pe bază de
transmisii pentru transformarea indirectă a miªcării, pe bază de

... 4.3. Module manual command. For this transmission procedure f bits on port by means of which motor is sequencely operated; for each step on which is wanted to be worked out by motor having need by acknowledge from keyboard. The course changing of motion is achieved by two distinct keys (S and D). In ...
RT8450B - Richtek
RT8450B - Richtek

... The RT8450B is specifically designed to be operated in buck, buck -boost and boost converter applications. This device uses a fixed frequency, current mode control scheme to provide excellent line and load regulation. The control loop has a current sense amplifier to sense the voltage between the IS ...
CENTRAL STAFF TRAINING AND RESEARCH INSTITUTE  MINISTRY OF LABOUR AND EMPLOYMENT
CENTRAL STAFF TRAINING AND RESEARCH INSTITUTE MINISTRY OF LABOUR AND EMPLOYMENT

Electronic fluorescent lamp ballast
Electronic fluorescent lamp ballast

Auxiliary Relay
Auxiliary Relay

... rated voltage of 250V DC or AC. The material used for the contact tips is hard silver. At the most, 3 normally closed contacts are permissible which should be distributed evenly between two sides. The field weakening resistor is cut by means of a delayed, normally closed contact on a special contact ...
How to troubleshoot why the drive won`t follow a speed reference
How to troubleshoot why the drive won`t follow a speed reference

... P80 [Speed Mode] Default is “0 Open Loop” This could be set to some other value not allowing you to obtain the Speed Reference given. P121 [Slip RPM @ FLA] Default is “based on P44 [Motor NP RPM]” This could be set to some other value not allowing you to obtain the Speed Reference given. P147 [Curre ...
Lecture5 - UCSB ECE
Lecture5 - UCSB ECE

... Current from CMOS transistors comes from supply rails ...
Category 5 Parallel Operating
Category 5 Parallel Operating

... Protection alternatives for the various acceptable transformer connections are shown. Only one protection alternative will ultimately be used, depending on the actual transformer winding connections. VT’s for 59, 27, 81o/u and 32 are shown connected on the primary (Project side) of the power transfo ...
FX3410861090
FX3410861090

... CML buffers are used at the output of divider1 and the output from the buffer should be taken through inverter chain in order to shape and sharpen the waveform edges. In the output port of divider D1 also there must be inverter chain to shape and sharpen the output waveform edges and to produce rail ...
Electronic fluorescent lamp ballast
Electronic fluorescent lamp ballast

... It would seem that devices with a BVCES of 400V could be used - however this would mean that the devices would have a BVCEO less than the voltage applied by the mains, which is not advisable. Hence the transistors should have a BVCEO rating of 400V minimum. The same type of calculation can be used f ...
Doc - Greengineerz
Doc - Greengineerz

... The LED is used to indicate the direction and percentage of throttle and state of calibration. The LED may be one of three colors; red, orange or green. A solid green LED indicates positive output voltage equal to the input voltage of the Talon. A solid Red LED indicates an output voltage that is eq ...
Title Electrical and Thermal Characteristics of Household Appliances
Title Electrical and Thermal Characteristics of Household Appliances

... These potential impacts of harmonics mean that regulation of electromagnetic compatibility (EMC) is of crucial importance. Current EU directive on EMC, [6], repealed directive [7], regulating EU wide electrical standards in relation to electrical equipment and appliances. That directive refers to a ...
How to troubleshoot why the drive won`t follow a speed reference
How to troubleshoot why the drive won`t follow a speed reference

Voltage - Electromotive Force
Voltage - Electromotive Force

... All the above information is commonly conveyed by placing a set of plus (+) or minus (-) signs directly adjacent to the points of interest with the magnitude of the voltage given by a numerical value. If a circuit common or ground is clearly evident, the magnitude is placed directly adjacent to the ...
SVC Light® enabling strong flicker reduction from a steel plant in the
SVC Light® enabling strong flicker reduction from a steel plant in the

... gated value arising from the operation of all three plants.The main purposes of the SVC Light installation are to mitigate the flicker emission produced by the EAF, reduce the harmonic pollution, compensate the reactive power and stabilize the furnaces’ bus voltage. EAF grid impact The EAF generates ...
250mA High Speed Buffer BUF634
250mA High Speed Buffer BUF634

... bandwidths can be set by connecting a resistor in series with the bandwidth control pin—see typical curve "Quiescent Current vs Resistance" for resistor selection. Characteristics of the bandwidth control pin can be seen in the simplified circuit diagram, Figure 1. The rated output current and slew ...
< 1 ... 751 752 753 754 755 756 757 758 759 ... 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