• 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
Aalborg Universitet PMSM Drive Systems
Aalborg Universitet PMSM Drive Systems

... inverter state it is not necessary to have the possibility to switch all possible inverter states in the next sampling period in order to control the current. It is enough to be able to switch the two neighbor vectors and a zero vector, which are obtained by changing one leg state. However if the ac ...
Power Factor Correctors for Rectifiers
Power Factor Correctors for Rectifiers

PIVVIR POWERPOINT!
PIVVIR POWERPOINT!

... • What’s Pivver? Well, that’s not spelled correctly. The correct spelling is: P=IV and V=IR ...
Switches w/ Digital Control - MSU College of Engineering
Switches w/ Digital Control - MSU College of Engineering

... the calculations. The gates can be driven by the digital signal from the decoder. The best time to use these switches is when there will only be low current (<30mA) flowing through them, voltage that does not exceed ~24V, and where the R_on will not adversely affect the operation of the circuit. In ...
High Efficiency Hyperspectral Imager
High Efficiency Hyperspectral Imager

... pole, single throw switch on the side of the device to control the LED backlight ...
Difet OPA606 Wide-Bandwidth OPERATIONAL AMPLIFIER
Difet OPA606 Wide-Bandwidth OPERATIONAL AMPLIFIER

... pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI d ...
Poster
Poster

LM12CL 80W Operational Amplifier 80W Operational
LM12CL 80W Operational Amplifier 80W Operational

... low-inductance capacitors having short leads and located close to the package terminals to avoid spurious oscillation problems. Power op amps require larger bypass capacitors. The LM12 is stable with good-quality electrolytic bypass capacitors greater than 20 µF. Other considerations may require lar ...
Keysight B1505A Power Device Analyzer/Curve Tracer 1500 A/10
Keysight B1505A Power Device Analyzer/Curve Tracer 1500 A/10

... High power wafer probing support enables testing at > 200 A and 10 kV on-wafer True knob-sweep curve tracer functionality Integrated thermocouple inputs for temperature measurement Oscilloscope view (I/V) function supports output waveform monitoring Fully automated measurement & data analysis High c ...
Transformers and their Role in Transmission
Transformers and their Role in Transmission

UNIT 5 PPT
UNIT 5 PPT

... Is a thin wire made of two disimilar metals. Hence there will be two junctions (hot & cold). When the temperature at two junctions are different, a voltage is developed across the thermocouple (i.e across both junctions). This developed voltage is proportional to the difference between the two junct ...
Power Factor Correction and Harmonics
Power Factor Correction and Harmonics

... need to be, with a corresponding increase in the cost of installation. Failure to up-rate cables could cause current overload and subsequent heating or even fire in extreme cases. 4) Damage to capacitors The mains network is generally considered to be inductive and its impedance increases with frequ ...
STK5DFU340D-E Advance Information 2-in
STK5DFU340D-E Advance Information 2-in

... Power Module (IPM), 600 V, 5 A The STK5DFU340D-E is a fully-integrated PFC and inverter power stage consisting of a high-voltage driver, six motor drive IGBT’s, one PFC IGBT, one PFC rectifier and a thermistor, suitable for driving permanent magnet synchronous (PMSM) motors, brushless-DC (BLDC) moto ...
The Giraffe - Vätterbygdens Truck AB
The Giraffe - Vätterbygdens Truck AB

1 Power Supply Systems
1 Power Supply Systems

... systemis developed, but if, say, threecontrollers are eventually needed the cost of mains fed ones may exceed that of a single power supply unit feeding three low voltage controllers. However, this disadvantage may be outweighed by the advantage of being able to use common return wiring. This is pos ...
Chapter 2-AMSC
Chapter 2-AMSC

Grin Technologies SineWave Grinfineon Controller User
Grin Technologies SineWave Grinfineon Controller User

... Of the 36 possible ways to map the hall and phase wires, only 3 will spin the motor properly in the forwards direction. Another 3 combinations will spin the motor in reverse, and the remaining 30 combinations will either not turn the motor at all, or will turn it with great inefficiency. We recommen ...
Download MPU-32 Datasheet
Download MPU-32 Datasheet

... 24-Vdc source for digital input Programmable 4-20-mA analog output On-board temperature-sensor input, 100-Ω -Platinum RTD or PTC Three programmable output relays Local RS-232 communications, optional Network Communications PC-interface software (SE-Comm-RIS) 4 line x 20 character backlit LCD display ...
Presentation - IEEE Standards working groups
Presentation - IEEE Standards working groups

... • 6.3.1.1 Hand Held Detector • 6.3.1.2 Mobile E-field Detector • 6.3.1.3 Hand Held E-field Detector • 6.3.1.4 Voltmeter • 6.3.1.5 Ground Lead • 6.3.1.6 Switchable Shunt Resistor • 6.3.1.7 Ground Rod • 6.3.2 Safety Equipment ...
lecture 8 - Portal UniMAP
lecture 8 - Portal UniMAP

... Even when the bias current correcting resistor R is used, there could still be a few mV at the output when the inputs of the op-amp are grounded. To correct this problem, a small DC voltage can be applied at the input (+ve or –ve, as required) to drive the output voltage to zero. Known as input offs ...
Some hints regarding Thevenin Equivalents and Circuits with
Some hints regarding Thevenin Equivalents and Circuits with

... Normally, one can find RTH by using RTH = (VOC / ISC ). However, what is the value of 0V/0A ??? The answer: we do not know. (RTH is NOT equal to 2R || R. You can only zero out independent sources.) A different approach is needed. RTH is the resistance seen looking back into the circuit when all inde ...
A 15 GHz 256/257 Dual-Modulus Prescaler in
A 15 GHz 256/257 Dual-Modulus Prescaler in

... The significant increase of the operating speed is achieved by using merged AND-gate flip-flops. At the same time the power consumption is reduced because the two current sources required for the separate AND gates can now be omitted. This principal is shown in figure 3. The CML AND-gate is connecte ...
ZXTN2007G 30V NPN MEDIUM POWER LOW SATURATION TRANSISTOR IN SOT223 SUMMARY BV
ZXTN2007G 30V NPN MEDIUM POWER LOW SATURATION TRANSISTOR IN SOT223 SUMMARY BV

... Fax: (49) 89 45 49 49 49 [email protected] ...
IOSR Journal of Electrical And Electronics Engineering (IOSRJEEE)
IOSR Journal of Electrical And Electronics Engineering (IOSRJEEE)

W044151159
W044151159

... Isolated power systems are commonly founded in rural and remote area of the world. These systems represent the alternative to grid connection, where interconnection to a large grid is not viable due to high cost and/or geographical obstacles. Furthermore, power systems such as those onboard of ships ...
< 1 ... 942 943 944 945 946 947 948 949 950 ... 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