• 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
Electronic Metronome
Electronic Metronome

... Similarly, you can not put the red probe between the 200 W resistor and the LM 555 and the black probe between the 200 W resistor and the speaker because you will then force the node voltage between the 200 W resistor and the speaker to be equal to 0 V. ◦ The square wave output from the LM 555 timer ...
Development of the Klystron Modulator using a High
Development of the Klystron Modulator using a High

DETERMINATION OF EFFICIENCY (INDUCTION MACHINES)
DETERMINATION OF EFFICIENCY (INDUCTION MACHINES)

... 4. Selection of measurement points for load and no-load tests Measurement points - Clause 6.4.4.2 – Load curve test Clause 6.4.4.2 – Load curve test describes testing the motor under different loads. In the current version of IEC 60034-2-1:2007 standard, Clause 6.4.4.2 states that 6 measurement poi ...
Dual Channel Photologic Encoder Detector
Dual Channel Photologic Encoder Detector

... Two matched detectors with photolithographic control of relative position Dual Photologic® circuitry in single package provides reduced component count Open collector inverter output for flexibility of circuit interface Low cost plastic housing ...
DC Motors
DC Motors

... Given the armature coil sequence and their physical location, plot the induced AC voltages for a three phase two pole AC generator as a function of time and as phasors. ...
Optimization of control path for low-ripple fast
Optimization of control path for low-ripple fast

O A
O A

... reliability and quality of the power system (Hannan et al., 2004, Yorkshire Electricity, Benmouyal, 1999, Verma et al. 1979). However, this paper highlighted only the system configuration, load demand, duration and losses. Test Distribution System: A test distribution system is shown in Fig. 1. It c ...
Design Implementation of Three-Phase Squirrel
Design Implementation of Three-Phase Squirrel

... Abstract: In most large cities, land is scarce and consequently it is very valuable. This has led to the construction of tall building which occupies only a small area of land while providing a lot of floor space where people can live or work. So, in these buildings, the elevator become useful and a ...
PSCAD Simulation of Grid-Tied Photovoltaic Systems and Total
PSCAD Simulation of Grid-Tied Photovoltaic Systems and Total

Three Level Inverter Based Shunt Active Power Filter Using Multi
Three Level Inverter Based Shunt Active Power Filter Using Multi

... controlled voltage source. Traditionally, shunt APFs are implemented using VSI based two-level inverters. Such APFs use a transformer to meet desired voltage profile [11]. The transformer leads to increasing the losses in the system and it may saturate once the load draws any DC current. Further at ...
High-Frequency Link: A Solution for Using Only One DC Source in
High-Frequency Link: A Solution for Using Only One DC Source in

... powerful (main) H-bridges manage the 80% of the power and operate at the fundamental frequency, reducing the switching losses. Moreover, the THD is highly reduced; therefore, output filters can be eliminated, and the cable length to the motor is less restricted. However, ACHB introduces a partial la ...
Power-system protection
Power-system protection

Induction Motors
Induction Motors

... brings the following benefits:  no electrical energy is absorbed by the field excitation system and thus there are no excitation losses which means substantial increase in the efficiency,  higher torque and/or output power per volume than when using electromagnetic excitation,  better dynamic per ...
C270 Stereo Power Amplifier
C270 Stereo Power Amplifier

... tripling its single channel stereo mode continuous power rating into 8 ohms. This makes it an ideal choice for a subwoofer amplifier or part of a high powered home theatre or stereo system. Additional Features ...
A DCM Based PFC CUK Converter-Speed Adjustable BLDC
A DCM Based PFC CUK Converter-Speed Adjustable BLDC

Surges Harm ATS and Inverters
Surges Harm ATS and Inverters

DC Current Transducer DK-B020 I = 50 .. 200 A
DC Current Transducer DK-B020 I = 50 .. 200 A

SuPER Cart DC Motor Model and Ultra
SuPER Cart DC Motor Model and Ultra

DC current transducer DK
DC current transducer DK

... installation and operation of the transducer and any electrical conductor. The transducer shall be used in electric/electronic equipment with respect to applicable standards and safety requirements and in accordance with all the related systems and components manufacturer’ operating instructions Cau ...
N43068385
N43068385

... demand of using nonlinear load caused by the serious problem of power quality and the disturbance are dominated by the electronic loads. A single phase four leg converter consist of four leg, in which two legs are used for rectifying and charging purpose, and the other two legs are used for inverter ...
Class S Power Quality Analyser MI 2885 Master Q4
Class S Power Quality Analyser MI 2885 Master Q4

... of voltage events like Dips and Swells. In addition the user can set 7 optional triggers for capturing waveforms of selected quantities. A large easy-to-read graphical colour display enabling the user to detect harmonics, phasors and waveforms anomalies in the installation simply by connecting the d ...
Alternating Current (AC) vs. Direct Current (DC)
Alternating Current (AC) vs. Direct Current (DC)

... Where did the Australian rock band AC/DC get their name from? Why, Alternating Current and Direct Current, of course! Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current ...
Low-Voltage Current Sink Controls High-Voltage
Low-Voltage Current Sink Controls High-Voltage

J33 GENERAL CHARACTERISTICS
J33 GENERAL CHARACTERISTICS

... This document is not contractual - The SDMO company reserves the right to modify any of the characteristics stated in this document without notice, in a constant effort to improve the quality of its products. *ISO 8528 ...
Platforma mini robota edukacyjnego AMRobot - eCube
Platforma mini robota edukacyjnego AMRobot - eCube

... robots. Despite its small PCB dimensions (30 mm x 60 mm) it is fully equipped with features that do not exist in other controllers. It includes all important functions needed to control mini-robots. The V2 version of the controller is fully compatible with Arduino IDE programming environment. ...
< 1 ... 1075 1076 1077 1078 1079 1080 1081 1082 1083 ... 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