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Lecture2
Lecture2

... Strictly speaking current is a basic quantity and charge is derived. However, physically the electric current is created by a movement of charged particles. ...
PPT - MakeItOrTakeIt
PPT - MakeItOrTakeIt

Modeling and Control of Renewable Source Boost Converter using
Modeling and Control of Renewable Source Boost Converter using

... renewable energy sources such as solar cell, wind mills, wind generators and fuel cell systems. Because of these advantages boost converters are more extensively used in industrial applications. Generally, DC-DC boost converters consist of power electronic circuits and semiconductor devices which ac ...
TeraOhm 5 kV - Emona Instruments
TeraOhm 5 kV - Emona Instruments

ee2.cust.edu.tw
ee2.cust.edu.tw

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

Overview
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BDTIC 900V CoolMOS™ C3 High Voltage Power MOSFET Using Charge Compensation Principle
BDTIC 900V CoolMOS™ C3 High Voltage Power MOSFET Using Charge Compensation Principle

... industry and renewable energies applications. Change of design criteria is possible as designers can allow a higher DC-link or input voltage. High power applications which uses 3-phase PFC and PWM stages with DC-link voltages up to 750V will benefit from 900V CoolMOS™ C3 offering lowest on-resistanc ...
Role of Semiconductor Devices in Portable Electronics Power
Role of Semiconductor Devices in Portable Electronics Power

... which generally consists of a transformer, a Pulse Width Modulator (PWM), a power transistor and feedback circuitry provides better regulation, efficiency and reduced size. While a conventional 265V to 12V, 60 Hz steel transformer with 12W output measures 5 in 3 and weighs 0.7 lb, a 100kHz transform ...
Twisted Pear Audio - Legato User Manual v1.0.2
Twisted Pear Audio - Legato User Manual v1.0.2

... The Legato is a discrete balanced I/V converter with an optional built in balanced to single ended signal converter. It utilizes a common base CFP amplifier which is made up of an NPN bipolar transistor and a PChannel MOSFET for each end of both channels. There is also an optional buffer which is ma ...
Instantaneous Current-Sharing Control Strategy for Parallel
Instantaneous Current-Sharing Control Strategy for Parallel

CSCI 2980: Introduction to Circuits, CAD, and Instrumentation
CSCI 2980: Introduction to Circuits, CAD, and Instrumentation

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

In conventional energy storage systems using series
In conventional energy storage systems using series

... Energy storage cells, particularly lithium-ion cells, must be operated within a safety boundary to ensure years of safe operation otherwise resulting in accelerated aging and increased risks of hazardous consequences triggering an explosion in the worst-case scenario. Accordingly, for energy storage ...
Ratioed Circuits
Ratioed Circuits

more information and higher functionality introduced by modern
more information and higher functionality introduced by modern

... For the rotor cage, the start is normally the most critical period, with enormous losses fed into the cage. Temperatures can reach levels in excess of 300°C and large thermal forces can stress the cage. For larger motors, the admissible start time is often limited by the rotor. Protection with temp ...
measurement of speed by electromagnetic pick up
measurement of speed by electromagnetic pick up

... Study of RTD as temperature measuring transducer Electrically heated oven upto 90 C RTD (PT-100) probe with protection cover 3.5 digit DPM as temperature indicator Bridge circuit for transducer Differential amplifier with feedback Lead compensation system Glass thermometer for reference MEASUREMENT ...
PICCOLO power amplifier module
PICCOLO power amplifier module

... Piccolo is an high performances power amplifier module based on the world famous LM3886 IC by National Semiconductor. Piccolo's design is centered on the following points: – high stability operation on “real” loads without inductance on output to stabilize the amp. – reduction to all paths to increa ...
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1. Using spice, draw the voltage-current graph by changing Vgs from

... Q2. Model a CMOS inverter using SPICE. Assume that the threshold voltage for the nmos transistor is 1v and that of the pmos transistor is -1v. Do not specify the other parameters so that the default parameters are used. Use a length of 1u and a width of 2u for both the nmos and pmos transistors. As ...
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II3514551462

... By different combinations of the four switches in each H-bridge, three output voltage levels can be generated, –Vc, 0, or +Vc. A hybrid multilevel inverter with n-input sources will provide 2n+1 levels to synthesize the AC output waveform. This (2n+1) level voltage waveform enables the reduction of ...
Download T2400 Datasheet
Download T2400 Datasheet

... The T2400 3-Phase Dual Overcurrent Relay includes two combined overcurrent relays, designed for protection or monitoring of generators and power transmissions. A typical application is to use one of the overcurrent functions to trip the generator circuit breaker, and the other overcurrent function t ...
TSL25x
TSL25x

... Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is cu ...
accumetric - PCB Piezotronics
accumetric - PCB Piezotronics

... slip rings and legacy FM telemetry, offering a perfect solution for applications requiring dependable data retrieval and easy installation. The AT-5000 EasyApp utilizes a small battery powered transmitter mounted using an aramid fiber strap to directly measure, digitize, and transmit true torque dat ...
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Aalborg Universitet
Aalborg Universitet

< 1 ... 1019 1020 1021 1022 1023 1024 1025 1026 1027 ... 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.
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