A TCR is a thyristor controlled inductor, connected in shunt with the line, in which the thyristor valve is controlled by partial conduction, in order to continuously vary the effective reactance of the line. TCR is a Variable impedance type static VAR generator, in which the reactor current can be varied by applying the firing […]
What is Thyristor Controlled Reactor (TCR)? Working Principle & Diagram Read More »
The Open Circuit and Short Circuit Test on Transformer can be used to determine the efficiency and regulation of a transformer at any predetermined load for that we do not have to actually load the transformer. The parameters of the equivalent circuit of a transformer can be obtained by using the open circuit (O.C.) test
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A Static VAR Compensator (SVC) is a shunt connected static VAR generator or absorber in which control of certain power system parameters are achieved by exchanging the capacitive or inductive current which is possible by adjusting its output. SVC is a common name for a thyristor-controlled or thyristor-switched reactor, and/or thyristor-switched capacitor or combination. Figure
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A buck-boost converter provides an output voltage that can be either less than or greater than the dc input voltage VS. Hence the name “buck boost”. The output voltage polarity is opposite to that of the input voltage. It is a combination of buck and boost converters.
Figure 1: Voltage Source Converter. Symbolic representation of a voltage sourced convener is as shown in figure 1. The symbol has a box with a gate tum-off device paralleled by a reverse diode, and a D.C capacitor as its voltage source.
What is Voltage Source Converter? Working Principle & Circuit Diagram Read More »
In the dc-dc buck converter, the input voltage is constant dc voltage whereas the output voltage is a variable dc voltage and the output voltage is lower than the input voltage. Hence the name dc-dc buck converter. Figure 1: Circuit Diagram of Buck Converter.
Figure 1: Basic of Switch Mode Power supply (SMPS).
What is Switch Mode Power supply (SMPS)? Working, Block Diagram & Circuit Diagram Read More »
Permanent magnet motors are similar to conventional DC motors except the use of permanent magnet to produce flux instead of field winding. The use of high energy permanent magnet in the motors which advances in the field for the purpose of simplicity and low initial cost has led to the formation of new class of
What is Permanent Magnet DC Motor (PMDC Motor)? Construction, Diagram & Applications Read More »
When the anode terminal of a diode is connected to the negative terminal of voltage source and cathode to the positive terminal then the diode is reverse biased as shown in Fig. 1 (a) and its symbolic representation in Fig. 1 (b).
What is Reverse Bias of PN Junction Diode? Read More »