• 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
R302 Receiver, made before Oct 2007
R302 Receiver, made before Oct 2007

... A complete alignment is needed whenever the frequency is changed by more than about 1 MHz. Alignment ensures that the frequency synthesizer is optimized at the center of the vco range and that all stages are tuned to resonance. Equipment needed for alignment is a sensitive dc voltmeter, a stable and ...
Programmable Solar Charge Controller with Nightlight
Programmable Solar Charge Controller with Nightlight

III. MoDeling of proposed Topology
III. MoDeling of proposed Topology

IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)

FIN1022 2 X 2 LVDS High Speed Crosspoint Switch FI N1022 2 X
FIN1022 2 X 2 LVDS High Speed Crosspoint Switch FI N1022 2 X

... 4. Fail safe protection on the outputs that draw less than 20 µA of current (worst case) on the LVDS inputs. In this condition, if the input is in fail safe selected to OUT0+/OUT0− (say) and the outputs are Enabled then OUT0+ = HIGH and OUT0− = LOW. This prevents noise from being amplified when the ...
RMS Power
RMS Power

... voltage, current, and power. So I’ve put together this explanation which uses as little math as possible, and hopefully explains the concepts in an intuitive way. The Meaning of Average Before I can proceed, it’s important to explain just what average means. Fortunately, its meaning when dealing wit ...
A TWO-STAGE 1 kW SOLID-STATE LINEAR AMPLIFIER INTRODUCTION GENERAL DESIGN CONSIDERATIONS
A TWO-STAGE 1 kW SOLID-STATE LINEAR AMPLIFIER INTRODUCTION GENERAL DESIGN CONSIDERATIONS

... in case of a slight unbalance, the total dissipation ratings may be well exceeded in a multi-device design. With high drive power available, and the power supply current limit set at much higher levels, it is always possible to have a failure in one of the push-pull modules under certain load mismat ...
Atmel LED Drivers MSL3163 and MSL3164
Atmel LED Drivers MSL3163 and MSL3164

... a 1 MHz I2C serial interface. Both interfaces support video frame-by-frame LED string intensity control for up to 16 interconnected devices to allow active area dimming. The devices include an advanced PWM engine that easily synchronizes to a video signal, and per-string phase adjustment to reduce u ...
NDT2955 P-Channel Enhancement Mode Field Effect Transistor  April 2002
NDT2955 P-Channel Enhancement Mode Field Effect Transistor April 2002

... 1. Life support devices or systems are devices or support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, o ...
LSK389 - Linear Integrated Systems, Inc.
LSK389 - Linear Integrated Systems, Inc.

motor protection tables
motor protection tables

... A motor control circuit is a circuit of a control apparatus or system that carries the electric signal directing the performance of the controller (430.71). It does not carry the main power current. A control circuit tapped on the load-side of the motor branch circuit fuse which controls the motor o ...
EMI4193 数据资料DataSheet下载
EMI4193 数据资料DataSheet下载

... ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any partic ...
Full-Text - Radioengineering
Full-Text - Radioengineering

... voltage mode circuits. Besides, VDBA has a transconductance gain, thus the proposed circuits can be employed without using any external resistors. Two new voltage-mode biquad filter configurations are presented for VDBA application. Each proposed filter employs two active elements and two or three p ...
Evaluates:  MAX17020 MAX17020 Evaluation Kit General Description Features
Evaluates: MAX17020 MAX17020 Evaluation Kit General Description Features

soft start
soft start

... • START CURVE 0 – Standard curve (Default). This curve is the most suitable curve for preventing prolonged starting and motor overheating. Note: When RVS-DN is connected Inside Delta, the RVS-DN will always use CURVE 0 regardless of the curve defined. • START CURVES 1-3 - Pump Control - Induction mo ...
Chapter 1-AMSC
Chapter 1-AMSC

Bulletin 1606 Switched Mode Power Supplies 1606-XLE960DX-3N
Bulletin 1606 Switched Mode Power Supplies 1606-XLE960DX-3N

... feature a new and innovative concept for generating an isolated DC voltage from a three-phase mains system. A semi-regulated resonant converter enables a very compact design, maximum efficiency and extremely competitive pricing with only a small compromise in the output voltage regulation, output ri ...
7-5 CurrentWatch™ Current Sensors ECS Series Current Switch
7-5 CurrentWatch™ Current Sensors ECS Series Current Switch

... The ECS can sense continuous currents from 1 to 150A and does not require any supply voltage, as the power required is induced from the monitored conductor. The output is a non-polarity-sensitive solid-state contact for switching AC and DC circuits up to 240V AC/DC. This switch also includes an LED ...
US 6545450 - Santangelo Law Offices
US 6545450 - Santangelo Law Offices

... energy storage mechanism may slow down a circuit, as the energy may be produced and metered into the magnetic field at some rate before the current can build up. The available voltage, the inductance, and the rate of change of current in a conductor may be related by the following equation, well kno ...
engineering recommendation no. 1 limits for harmonics in the
engineering recommendation no. 1 limits for harmonics in the

... ‘linear’ loads do not usually cause disturbance to other users of the supply system. Examples include lighting, heating, directly driven motors, pumps etc. Some types of loads cause a distortion of the supply voltage / current waveform due to their non-linear impedance. The most common devices causi ...
Boost Converter Design
Boost Converter Design

... This is the MOSFETs ‘Drain Source on resistance’ or Rdson. Again, this needs to be as low as possible. Now, MOSFET manufacturers reduce the ON resistance of the MOSFET by constructing many parallel conduction paths between the Drain and Source. Thus, like connecting resistors in parallel, the ON res ...
NAS3XXX SMT Non-Isolated Point-of
NAS3XXX SMT Non-Isolated Point-of

A 1-V Fully Differential Sample-and-Hold Circuit using Hybrid Cascode
A 1-V Fully Differential Sample-and-Hold Circuit using Hybrid Cascode

... folded OTA. The use of DTMOS reduces the input/output common mode requirement on the OTA input while hybrid cascode compensation yields to a higher amplification bandwidth compared to the standard Miller and compensation techniques. Preliminary post-layout simulation results in a 0.18 μm digital CMO ...
Low voltage 0.5 max dual SPDT switch, single enable with break
Low voltage 0.5 max dual SPDT switch, single enable with break

MM74C911 4-Digit Expandable Segment Display Controller
MM74C911 4-Digit Expandable Segment Display Controller

< 1 ... 516 517 518 519 520 521 522 523 524 ... 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