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4 chapter AC motors starting and protection systems
4 chapter AC motors starting and protection systems

High Frequency Conducted Disturbances
High Frequency Conducted Disturbances

A Comparative Study of Switching Loss in IGBT and
A Comparative Study of Switching Loss in IGBT and

Force Sensitive Resistor (FSR)
Force Sensitive Resistor (FSR)

... FSRs are basically a resistor that changes its resistive value (in ohms Ω) depending on how much it is pressed. These sensors are fairly low cost, and easy to use but they're rarely accurate. They also vary some from sensor to sensor perhaps 10%. So basically when you use FSRs you should only expec ...
Measurement Methods for Calculation of the Direction to a Flicker
Measurement Methods for Calculation of the Direction to a Flicker

... often affects a large number of customers. The flicker sources are devices like arc furnaces, welding machines etc. which are connected to the high voltage grid. The connection of the devices to the high voltage grid is one reason why flicker propagates widely in the network. Solutions available to ...
Soft Magnetic Materials
Soft Magnetic Materials

... Soft Magnetic Materials Soft magnetic materials are used extensively in power electronic circuits, as voltage and current transformers, saturable reactors, magnetic amplifiers, inductors, and chokes. These magnetic devices may be required to operate at only 50/60 Hz, or at frequencies down to dc or ...
Motor Nonlinearities in Electrodynamic Loudspeakers
Motor Nonlinearities in Electrodynamic Loudspeakers

MAX8791/MAX8791B Single-Phase, Synchronous MOSFET Drivers General Description Features
MAX8791/MAX8791B Single-Phase, Synchronous MOSFET Drivers General Description Features

... the load current of each phase is equal to 1/2 the peakto-peak ripple current, which is a function of the inductor value. For a battery input range of 7V to 20V, this threshold is relatively constant, with only a minor dependence on the input voltage due to the typically low duty cycles. The switchi ...
What transients are and why you need protection
What transients are and why you need protection

... All Furse ESP protectors offer such superior protection and are termed as enhanced performance SPDs (SPD*) in line with BS EN 62305. Enhanced SPDs can also satisfy more than one test class/category by handling both high-energy partial lightning currents of 10/350 µs waveshape whilst offering very lo ...
SMJE 2103 Electiral Power System
SMJE 2103 Electiral Power System

... (a) If the power system is exactly as described above in Figure (a), what will the voltage at the load be? What will the transmission line losses be? (b) Suppose a 1:10 step-up transformer is placed at the generator end of the transmission line and a 10:1 step-down transformer is placed at the load ...
MAX1968/MAX1969 Power Drivers for Peltier TEC Modules General Description Features
MAX1968/MAX1969 Power Drivers for Peltier TEC Modules General Description Features

... the TEC. On-chip FETs minimize external components while providing high efficiency. A 500kHz/1MHz switching frequency and a unique ripple cancellation scheme reduce component size and noise. The MAX1968 operates from a single supply and provides bipolar ±3A output by biasing the TEC between the outp ...
LED measurement
LED measurement

... in front of the detector and measurements using the Admesy Iliad software can be carried out right away (fig 2). Typically, flicker is rather easy to measure as it is a relative measurement. Do ensure you’re only measuring the sample under test and eliminate other (ambient) lighting that should not ...
TPS23750 Flyback-Converter Evaluation Board
TPS23750 Flyback-Converter Evaluation Board

... Making Measurements Stray magnetic fields from transformer T2 can couple noise into measurements. This noise may be noticeable when measuring a low-level signal like output ripple voltage. Keep the ground lead of the oscilloscope probe short and away from T2 to reduce the amount of noise pick-up. Gr ...
UVQ Series - power, Murata
UVQ Series - power, Murata

UVQ-5/20-D24PB-C Datasheet
UVQ-5/20-D24PB-C Datasheet

... optional mounting baseplate extends this to all practical temperature ranges at full power. UVQs achieve these impressive specifications while delivering excellent electrical performance. Overall noise is 35mVp-p (3.3V models) with fast step response (down to 50µsec). These converters offer high sta ...
FDMF6823A — Extra-Small, High-Performance, High-Frequency DrMOS Module FDMF6823A — Extra-Small, Hig Benefits
FDMF6823A — Extra-Small, High-Performance, High-Frequency DrMOS Module FDMF6823A — Extra-Small, Hig Benefits

... Charged Device Model, JESD22-C101 ...
LT6700/LT6700HV - Micropower, Low Voltage, Dual Comparator with 400mV Reference
LT6700/LT6700HV - Micropower, Low Voltage, Dual Comparator with 400mV Reference

... voltage comparators with a 400mV reference in a 6-lead SOT-23 or tiny DFN package. Operating with supplies from 1.4V up to 18V, these devices draw only 6.5µA, making them ideal for low voltage system monitoring. Hysteresis is included in the comparators, easing design requirements to insure stable o ...
Lab - Rose
Lab - Rose

New 4.5 kV IGBT and diode chip set for HVDC
New 4.5 kV IGBT and diode chip set for HVDC

... reactive-current control due to the turn-on and turn-off capability of the IGBT as well as superior performance in case of AC-grid faults. For high voltage applications a large number of semiconductors needed to be connected in series and simultaneous switching with high accuracy. Therefore a simple ...
Circuit breakers
Circuit breakers

MAX1533A/MAX1537A High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers General Description
MAX1533A/MAX1537A High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers General Description

... The MAX1533A/MAX1537A are dual step-down, switchmode power-supply (SMPS) controllers with synchronous rectification, intended for main 5V/3.3V power generation in battery-powered systems. Fixed-frequency operation with optimal interleaving minimizes input ripple current from the lowest input voltage ...
DRQ-12/50-L48 Series
DRQ-12/50-L48 Series

Aalborg Universitet kA/1.1 kV Non-Destructive Testing Equipment
Aalborg Universitet kA/1.1 kV Non-Destructive Testing Equipment

TCA 305 TCA 355 Proximity Switch
TCA 305 TCA 355 Proximity Switch

BP104
BP104

... respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. Vishay Semiconductor GmbH can certify that ...
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Electrical ballast



An electrical ballast is a device intended to limit the amount of current in an electric circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.Ballasts vary in design complexity. They can be as simple as a series resistor or inductor, capacitors, or a combination thereof or as complex as electronic ballasts used with fluorescent lamps and high-intensity discharge lamps.
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