• 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
analog - IHS.com
analog - IHS.com

Pattern Recognition Using IR
Pattern Recognition Using IR

AD713 Quad Precision, Low Cost, High Speed, BiFET Op Amp
AD713 Quad Precision, Low Cost, High Speed, BiFET Op Amp

... or capacitive load, since all current delivered to the load comes from the power supplies. Multiple high quality bypass capacitors are recommended for each power supply line in any critical application. A 0.1 µF ceramic and a 1 µF electrolytic capacitor as shown in Figure 26 placed as close as possi ...
Design and Implementation of a Hybrid Electric Bike
Design and Implementation of a Hybrid Electric Bike

... The two stage design is also compatible with our goal of enabling regeneration, but also creating an efficient hybrid-electric solution. The two stage design enabled us to use a clutch in the system which would not have been possible in either the single stage or roller based drive system given our ...
STEVAL-ISA051V2
STEVAL-ISA051V2

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notic ...
The Novel Stator Cage Machine as Traction Drive for Electric Vehicles
The Novel Stator Cage Machine as Traction Drive for Electric Vehicles

$doc.title

Fault Tolerant Three-Phase AC Motor Drive Topologies: A
Fault Tolerant Three-Phase AC Motor Drive Topologies: A

The Two-Phase, Full-Wave Rectifier
The Two-Phase, Full-Wave Rectifier

section 26 29 13 - UNLcms - University of Nebraska–Lincoln
section 26 29 13 - UNLcms - University of Nebraska–Lincoln

Full Paper
Full Paper

... based on DFIG. The stator and rotor windings of DFIGs are connected to grid. The stator has direct connection with the grid while the rotor of the DFIG connection is made through back-to-back converters. The back-to-back converter consists of two converters namely rotor side converter (RSC) and grid ...
Load regulation - s3.amazonaws.com
Load regulation - s3.amazonaws.com

Varistors SMOV34S Datasheet
Varistors SMOV34S Datasheet

... This is the maximum continuous sinusoidal RMS voltage that may be applied. This voltage may be applied at any temperature up to the maximum operating temperature of the device. ...
7B31 数据手册DataSheet 下载
7B31 数据手册DataSheet 下载

... The 7B Series of signal conditioners feature small size, low cost and a wide output voltage range for a variety of applications including process control and factory-floor environments. The single-channel 7B modules accept inputs from a range of transducers and are fully rated over the extended -40o ...
BMS-24-40 OG
BMS-24-40 OG

... The Model BMS-24-40 is a complete battery management system for installations, which already have a primary power supply. Smart Charging with Low Voltage Disconnect maintains battery protection by preventing battery failures caused by overcharging or excessively deep discharging. Dual Schottky diode ...
Low-Power Techniques for Network Security Processors
Low-Power Techniques for Network Security Processors

Solar Power Plant Design and Interconnection
Solar Power Plant Design and Interconnection

Application of network analyzer in measuring the
Application of network analyzer in measuring the

... (1) The use of differential probes should be avoided. In the case of isolated power supplies, if possible, short the ground of secondary, primary and control circuitry. (2) While measuring for switching power supplies, the use of lowest bandwidth results in best noise rejection. For a faster sweep s ...
Technical specification and quotation on 4x500kw gas engine
Technical specification and quotation on 4x500kw gas engine

... A professional enterprise that manufactures and develops technology of gas generator. Shengdong has over 30 year's experience of providing generator sets for prime and standby power. Leading products are gas generator set and their supplementary equipments. These products have characteristics of ene ...
Analysis of an Adaptive Observer for Sensorless Control of Interior
Analysis of an Adaptive Observer for Sensorless Control of Interior

... Signal-injection methods are based on detecting the anisotropy caused by the saliency of the rotor or by magnetic saturation. These methods are well suited to low speed operations, including zero speed. However, signal injection is usually not used at higher speeds since the additional voltage neede ...
PLANT WILT SENSOR ESK 4 –B
PLANT WILT SENSOR ESK 4 –B

... anywhere for monitoring. Principle: LDR or Light Dependent Resistor is a specialized type of resistor made up of Cadmium Sulphide. Its resistance depends on the intensity of light falling on it. In dark, its resistance will be very high about 10 Meg ohms. When light falls on LDR its resistance reduc ...
Chapter 22 Outline
Chapter 22 Outline

... A battery, in the form of DC AC powers most of our lights and household appliances through wall outlets. ...
d21cc80unvtw-d - Universal Lighting Technologies
d21cc80unvtw-d - Universal Lighting Technologies

PIC DESIGN (version 1) 2/11/2009 The decision to design and
PIC DESIGN (version 1) 2/11/2009 The decision to design and

... standard Multisim library contain their physical footprint, which is used by Ultiboard to place the necessary Thru-holes. Custom components and footprints can also be defined. The user then places each component footprint in the desired location within Ultiboard. The wire traces are generally routed ...
VOLTAGE DROP - Access Hardware Supply
VOLTAGE DROP - Access Hardware Supply

... to allow cool down of the PTC. In essence, it could require a service call to reset the power supply. In addition, PTCs are very temperature sensitive. They will trip at lower current ratings as the ambient temperature goes up, and higher than specified current ratings as the ambient temperature goe ...
< 1 ... 894 895 896 897 898 899 900 901 902 ... 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