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Fuzzy Logic Controlled Dynamic Voltage Restorer for
Fuzzy Logic Controlled Dynamic Voltage Restorer for

... less tolerant to power quality problems such as voltage sags, swells and harmonics. Voltage dips are considered to be one of the most severe disturbances to the industrial equipment. Voltage support at a load can be achieved by reactive power injection at the load point of common coupling. The commo ...
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... If an electron absorbs a photon with sufficient energy, it escapes from the ...
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... It’s possible to have capacitive steps as well as inductive steps. The power is always rated according to selected nominal voltage. Possible step types: Auto, Fon (Fix on), Foff (Fix off), Defective, AL (Alarm, e.g. for fan control) MANUAL operation: Attention: In manual operation, automatic control ...
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... Adjustable precision shunt regulator Summary Description The ZR431L is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 25mA. The output voltage may be set to any chosen voltage between 1.24 and 10 volts by selection of ...
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... ground, consequently leakage currents are avoided. However with this converter it is also not possible to process reactive power. 2.3 NPC topology with decoupled output and MOSFETs In order to increase the efficiency of a converter, it is desirable to use transistors that have low switching losses a ...
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Chapter 25 Homework - Handout

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... positive power supply and operates in a synchronic way with a second circuit called PWM SERVEUR, which has the task of making the PWM control of the negative power supply. Synchronism between the two PWM generator clocks avoids the formation of residual products at low frequency which could be conve ...
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unified power quality conditioner in distribution

... through a common dc-link capacitor. It is used to mitigate both load current as well as supply voltage imperfections. The main components of a UPQC are series converter and shunt converter, DC capacitors, low-pass and high-pass passive filters, and series and shunt injecting transformers. The purpos ...
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... RC SNUBBERS (SMPS) Snubbers are energy-absorbing circuits used to suppress the voltage spikes caused by the circuit's inductance when a switch, electrical or mechanical, opens. The most common snubber circuit is a capacitor and resistor connected in series across the switch (transistor). ...
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... series circuit is zero. In other words, the voltage across the resistor plus the voltage across the inductor will add up to the source voltage. PROCEDURE In this activity the Power Amplifier provides voltage for a circuit consisting of an inductor and a resistor. The Voltage Sensors measure the volt ...
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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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