• 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
SCALE Driver
SCALE Driver

... otherwise latch-up of the integrated circuits LDI 00I can occur. Particular care must be taken when driving via cables or longer leads. The gate current must be limited to its maximum value by a gate resistor. At a load of 39nF in series with 5.6 : (typical load of a 1200V/100A IGBT). Maximum contin ...
AO21260268
AO21260268

... digital computer simulation. It is shown that, by application of fuzzy AVR to the power systems commendable dynamic performance can be obtained. Flexible AC Transmission Systems (FACTS), based on either Voltage or Current Source Converters (VSC/CSC), can be used to control steady-state as well as dy ...
Circuits
Circuits

... terminal of a component, we say that the component obeys the passive sign convention (PSC).  Therefore, when the passive sign convention is being obeyed, it indicates that a component is dissipating energy (or power) as charge is being displaced from a higher potential to a lower potential. ...
PHE-10 - IGNOU
PHE-10 - IGNOU

... 8 weeks and TMA-2 in 12 weeks of receiving this booklet to accomplish its purpose as a teaching-tool. We strongly recommend that you should retain a copy of your assignment response to avoid any unforeseen situation. If possible, please attach a photocopy of this assignment along with your response. ...
Thomas Jan98.qxd
Thomas Jan98.qxd

HSF-1UR - Kepco power supplies
HSF-1UR - Kepco power supplies

... Units are shipped so that the alarm will trip and shutdown will occur upon overvoltage, open sense line and fan failure (fan failure shutdown can be disabled, see “Cooling:” on page 5 and Figure 7). The alarm will also trip upon undervoltage, however shutdown may not occur, depending on the load. A ...
Multiple parameter Monitor and Control in Wind Mills
Multiple parameter Monitor and Control in Wind Mills

... measured by using the Current Transformer (CT) which is located inside the generator. The generator output voltage is measured by using the Potential Transformer (PT) which is located next to the generator output block. Vibration in the generator is measured by using piezo electric crystal. Piezo el ...
MAX2242 2.4GHz to 2.5GHz Linear Power Amplifier General Description Features
MAX2242 2.4GHz to 2.5GHz Linear Power Amplifier General Description Features

... detector provides over 20dB of dynamic range with ±0.8dB accuracy at the highest output power level. An accurate automatic level control (ALC) function can be easily implemented using this detector circuit. The PA also features an external bias control pin. Through the use of an external DAC, the cu ...
Design of a Clap Activated Switch
Design of a Clap Activated Switch

... The 555 timer is a very versatile 8-pin, which can be configured with a few external components and to build many circuits involving timing. The NE 555, used in this design is a popular version that is suitable in most cases where a 555 timer is needed. It is a dual-In -line (DIL) package. The 555 t ...
Chapter 4-AMSC
Chapter 4-AMSC

FSQ0465RS/RB Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation -
FSQ0465RS/RB Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation -

Description
Description

... (Point-to-Point Interface) Connector cables are required to transfer data from the (Point-to-Point Interface) programming device to the PLC. Communication can only take place when the two devices speak the same language or protocol. Communication between a Siemens programming device and the S7-200 i ...
MPS_Lab_Ex4-ADC
MPS_Lab_Ex4-ADC

... Before step 14. above it may be necessary to normalize the results with bit shifts in the MAC. The scaling in step 16. may be necessary if the DAC uses a different resolution than the ADC. After implementing the filter, connect the output to the oscilloscope and input different frequencies from the ...
PDF
PDF

... In order to meet the requirement for a further reduction in loss, the V1 Series has adopted the full-gate CSTBT, the low-loss version of the PCM structure, in the same manner as the prior L1 Series (Fig. 3). Figure 4 compares the results of power loss simulations for the V1 Series and the old-genera ...
capacitors and inductors
capacitors and inductors

... Xc is Capacitive reactance, in ohms. 6.28 is actually “2 x pi(3.14159…)”. F is frequency of the signal, in Hertz. C is the capacitance, in Farads. Capacitance is the opposition to a change in Voltage, and Capacitive Reactance decreases as frequency increases. If we apply a DC voltage to a capacitor, ...
Power System
Power System

Electrical Noise . . . Sources, Symptoms and Solutions
Electrical Noise . . . Sources, Symptoms and Solutions

... Power line disturbances are usually easy to solve due to the wide availability of line filtering equipment for the industry. Only the most severe situations call for an isolation transformer. Line filtering equipment is required when other devices connected to the local power line are switching larg ...
TPS71501-Q1 数据资料 dataSheet 下载
TPS71501-Q1 数据资料 dataSheet 下载

... MSP430 microcontroller. Its ultralow supply current maximizes efficiency at light loads and its high input voltage range makes it suitable for supplies such as unconditioned solar panels. V I ...
AD60100B QUADRATURE DEMODULATOR 6
AD60100B QUADRATURE DEMODULATOR 6

... 275 MHz +22 dBm +12 dBm ±0.1 dB - 2 Degrees +5 dBm +5V @ 110 mA, -5V @ 40 mA ...
dc-dc convertor structu dc convertor structu dc convertor
dc-dc convertor structu dc convertor structu dc convertor

... multilevel convertor, at which the benefits of conversion increase with the number of half bridge is used. The main advantage of this convertor is the fact that it can operate both as Buck and Boost mode using the same structure. Overall system operation, in Buck or Boost mode, is given by the direc ...
Strain Gage Load Cell for Tensile and Compression Forces
Strain Gage Load Cell for Tensile and Compression Forces

... The force being measured must be applied to the thread along the central axis of the Type 4578A... . A force distributing cap or an adapter for the particular application must be used for this purpose, and introduction of shear or torsion avoided. Lateral forces within ±2,5 ° of the perpendicular fo ...


User's Model 701921
User's Model 701921

... When the power supply voltage from the dry cells is 5 V or more, or when using an external power supply. Ambient temperature 23±5°C When the capacity of dry cells goes down LED blinks. In such a case, replace the dry cells. Also, do not install the dry cells when using an external power supply. This ...
design and development of a public address audio amplifier
design and development of a public address audio amplifier

... bulky tubes to an extensive use of micro-chip solid-state semiconductors and from miniaturization to microminiaturization with yet seeming limitless possibilities unexplored. All these development have resulted in an evasive electronic design technique with a cardinal priority to maximize speed, eff ...
PLX1602
PLX1602

... the innovations of PowerWave™ switching technology to new levels of affordability. PowerWave is much more than light weight; it’s a way of providing ample current to the audio power ...
< 1 ... 767 768 769 770 771 772 773 774 775 ... 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