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Transformer Voltage Regulation and Efficiency
Transformer Voltage Regulation and Efficiency

... transformer with built-in voltage sensing circuitry that automatically changes taps to preserve system voltage constant ...
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... Because of the lack of fossil fills and ecological issues brought about by ordinary force era, renewable vitality, especially sun powered vitality, has turned out to be exceptionally prevalent. Sun oriented electric-vitality request has become reliably by 20%– 25% for every annum in the course of re ...
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... just by-passed and the fundamental component is enough to cause operation of the relay. In several other relays a 5th harmonic restraint is employed. (See DTH brochure at Annexure- ). ...
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... voltage exceeds the threshold, the switching pulse is immediately terminated. The FET remains off until the next switching cycle is initiated. The second consists of a fault counter. The fault counter is incremented on an over-current pulse. When the counter reaches two within three pulse, both FETs ...
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... At the beginning of the first quarter-cycle (0º to 90º) the voltage has just passed through zero and is increasing in the positive direction. Since the zero point is the steepest part of the sine wave, the voltage is changing at its greatest rate. The charge on a capacitor varies directly with the ...
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... but this is not a must; other approaches can be used as well. Repetitive control [20], which is regarded as a simple learning control method, provides an alternative to perfectly track periodic signals and/or to reject periodic disturbances in dynamic systems, using the internal model principle [21] ...
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Stepper motor



A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed.Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.
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