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... In a time, when mains ac is present, Inverter provides the output as is the input mains. ...
171032401 - Katalog.we
171032401 - Katalog.we

Naim Digital to Analogue Converter
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2008 IEEE. Personal use of this material is
2008 IEEE. Personal use of this material is

... harmonic voltages and currents. GAs use biological evolution and population genetics to search and arrive at a high-quality (near) global solution. The required design variables are encoded into a binary string as a set of genes corresponding to chromosomes in biological systems. Unlike the traditio ...
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2µA Supply Current, Low IB, Zero-Drift Operational Amplifier

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SBS 1.1-COMPLIANT FUEL GAUGE WITH

... battery-pack or in-system installation. The bq34z950 measures and maintains an accurate record of available charge in Li-Ion or Li-Polymer batteries using its integrated high-performance analog peripherals. The bq34z950 monitors capacity change, battery impedance, open-circuit voltage, and other cri ...
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... are switched off. This functionality has priority over all other functions, it is not possible to switch outputs on in this state ...
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AND8123 - Power Factor Correction Stages

... to the error it senses between the actual and wished levels of the output voltage. The error amplifier bandwidth is set low so that the error amplifier output reacts very slowly and can be considered as a constant within an AC line period. ...
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WECC VGITF White Paper - Draft - Western Electricity Coordinating

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QUICKTRONIC® POWERSENSE® T5 Dimming UNV
QUICKTRONIC® POWERSENSE® T5 Dimming UNV

... office lighting or automated building applications, both in new construction and retrofit projects. For the individual office or conference room, installation can be streamlined by using a 2-wire power line dimmer; eliminating the need for additional control wires. For more advanced systems, such as ...
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MAX31913 Industrial, Octal, Digital Input Translator/Serializer General Description

... serialization allows a drastic reduction in the number of optocouplers used for isolation. The device serializer is stackable so that any number of input channels can be serialized and output through only one SPI-compatible port. This reduces the number of optocouplers needed to only three, regardle ...
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... In case of overvoltage or dv/dt due to perturbations on the mains, the SSR can turn ON without control. Generally, the low energy of this overvoltage doesn’t damage the SSR, but during few milliseconds, the load is ON without control (can be acceptable for an heating load, not for a lamp or a motor) ...
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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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