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management and control of energy flows in
management and control of energy flows in

... smart system. Both of them show positive and negative features, depending on the point of view of the analysis. The central smart systems are characterized by a main controller system that is connected to the single point by means of a dedicated connection wire. The advantage of these kind of system ...
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Pulse-Width Modulation Control Circuits

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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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