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Internet Resources
Internet Resources

... Actual machine design starts with the selection of the main dimensions of the machine. The term ‘main dimensions’ refers to the air-gap diameter Ds measured at the stator bore and the equivalent core length l. The equivalent length of the core takes into account the influence of the flux fringing at ...
Inter-Chip USB Supplement to the USB 2.0 Specification_1.0
Inter-Chip USB Supplement to the USB 2.0 Specification_1.0

... The core specification [USB] defines mechanical, electrical and protocol interfaces between products interconnected with cables. The mechanical part of the interface includes definitions for receptacles and plugs. USB requires a power-supply voltage VBUS, at 5.0 Volt nominal, which provides the ener ...


Design and construction of a numerical over current relay
Design and construction of a numerical over current relay

... Electrical Power System protection is required for protection of both user and the system equipment itself from fault, hence electrical power system is not allowed to operate without any protection devices installed. Power System fault is defined as undesirable condition that occurs in the power sys ...
3000 SERIES Load Banks User Manual
3000 SERIES Load Banks User Manual

... is essential that the generator be capable of operating effectively at its maximum rated output when it is required. Unfortunately, it is not so easy to be absolutely sure that this will be the case. Many generating sets operate at a fraction of their rated output for a large proportion of the time, ...
WELDING MACHINES Brandon
WELDING MACHINES Brandon

... Welding machine. This is the term used to describe the machine which converts 220-380 volt AC (alternating current) electricity to welding voltage, typically 40-70 volts AC, but also a range of DC (direct current) voltages. It generally consists of a large, heavy transformer, a voltage regulator cir ...
NFPA 79
NFPA 79

Diode - STEP
Diode - STEP

17 Generator and Generator Transformer Protection
17 Generator and Generator Transformer Protection

MP-5400 Series Electronic Positive Positioning Hydraulic Actuator
MP-5400 Series Electronic Positive Positioning Hydraulic Actuator

... proportional control of dampers, valves, or program switches which require the return to normal position upon power interruption.This series is compatible with 2 to 15 Vdc input signals from System 8000’“, NETWORK 8000@, and DMS DDC controllers. ...
AN10273 Power MOSFET single-shot and repetitive
AN10273 Power MOSFET single-shot and repetitive

... to operate under repetitive UIS conditions safely. Figure 12 shows the single-shot and repetitive avalanche SOAR curves of BUK764R0-55B, where ‘Rep. Ava’ represents the ‘repetitive avalanche SOAR curve’. ...
TEK THM 550 Service
TEK THM 550 Service

... The Tektronix PS280 and PS283 Laboratory DC Power Supplies are multifunction benchtop or portable instruments. These regulated triple output power supplies provide one fixed 5 V, 3 A output suitable for powering logic circuits and two variable 0 to 30 V outputs useful in a wide variety of test and e ...
KFE10001-E
KFE10001-E

... 3 or 4 operations to lockout (Figure 9). When the stepped spacer engages the lockout mechanism trip lever—after it has been raised the preset number of counts—it causes the recloser to lockout. One operation to lockout can be set by moving the external non-reclosing handle, located under the sleet h ...
JTAG-SMT2-NC™ Programming Module for Xilinx® FPGAs Overview
JTAG-SMT2-NC™ Programming Module for Xilinx® FPGAs Overview

... all Xilinx Tools, including iMPACT, ChipScope™, and EDK. Users can load the module directly onto a target board and reflow it like any other component. The JTAG-SMT2-NC uses a 3.3V main power supply and a separate Vref supply to drive the JTAG signals. All JTAG signals use high speed 24mA three-stat ...
PACSystems RX3i Controllers
PACSystems RX3i Controllers

... GE Intelligent Platforms Control Systems Solutions ...
NBSG11 2.5V/3.3V SiGe 1:2 Differential Clock Driver with RSECL* Outputs
NBSG11 2.5V/3.3V SiGe 1:2 Differential Clock Driver with RSECL* Outputs

... NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are guaranteed only over the declared operating temperature range. Functiona ...
2. First-Order Filters
2. First-Order Filters

... while tied to V2 . For example, if V1  V2 , C2 absorbs charge from V1 and delivers it to V2 , thus approximating a resistor. We also observe that the equivalent value of this resistor decreases as the switching is performed at a higher rate because the amount of charge delivered from V1 to V2 per u ...
4000 Series Maintenance Manual
4000 Series Maintenance Manual

... When the rotor is set in motion, the moving magnetic field induces an alternating current (AC) in the stator windings. This output current increases with the speed of the rotor. The (AC) produced in the stator is converted to direct current (DC) by the positive and negative rectifier assemblies. The ...
Low Quiescent Current, Programmable Delay Supervisory Circuit
Low Quiescent Current, Programmable Delay Supervisory Circuit

... delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 has a very low typical quiescent current of 2.4 μA, so it is well-suite ...
HEF4104B 1. General description Quad low-to-high voltage translator with 3-state outputs
HEF4104B 1. General description Quad low-to-high voltage translator with 3-state outputs

... The HEF4104B is a quad low voltage-to-high voltage translator with 3-state outputs. It provides the capability of interfacing low voltage circuits to high voltage circuits. For example low voltage Local Oxidation Complementary MOS (LOCMOS) and Transistor-Transistor Logic (TTL) to high voltage LOCMOS ...
unclassified
unclassified

... advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic concepts through self-study. The presentation of this series is not oriented to any specific rating structure, but is divided into modules containing related information organize ...
nuclear electronics laboratory manual
nuclear electronics laboratory manual

HANDBOOK OF OPERATIONAL AMPLIFIER APPLICATIONS Application Report
HANDBOOK OF OPERATIONAL AMPLIFIER APPLICATIONS Application Report

Mehta_uta_2502M_10921
Mehta_uta_2502M_10921

... an on-tag power source instead of just from an interrogator’s communication signal. As a result, semi-passive tags have greater usability in a broad range of applications. My novel circuit designs act as an additional on-tag power source and are intended to be low-cost additions to an existing passi ...
Breakers, Relays, and Disconnects
Breakers, Relays, and Disconnects

... – Except, have three positions to allow power supply for an electrical component to be transferred from one source to another • Manual transfer switches may contain internal fuse protection ...
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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.
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