The STEAM Spot

A full Wave Bridge Rectifier Another type of circuit that produces the same output waveform as the full wave rectifier circuit above, is that of the  Full Wave Bridge Rectifier . This type of single phase rectifier uses four individual rectifying diodes connected in a closed loop “bridge” configuration to produce the desired output. The main advantage of this bridge circuit is that it does not require a special centre tapped transformer, thereby reducing its size and cost. The single secondary winding is connected to one side of the diode bridge network and the load to the other side as shown below.  The Diode Bridge Rectifier The four diodes labelled  D 1  to  D 4  are arranged in “series pairs” with only two diodes conducting current during each half cycle. During the positive half cycle of the supply, diodes  D1  and  D2  conduct in series while diodes  D3  and  D4  are reverse biased and the current ...

Introduction:                                   principle of operation of an inverter     An inverter can be taken as crude form of "UPS" obviously the main use of an inverter is only for powering common electrical appliances like light, fan etc . during power failure     As the name implies the basic function of a inverter is to invert an input D.C voltage (12DCV) into a much larger magnitude of alternating voltage (generally 110ACV or 220ACV)                            FUNDAMENTAL ELEMENT OF AN INVERTER  1 . OSCILLATOR :  an oscillator converts an input d.c voltage from a lead acid batteryinto a oscillating current or square wave (A.C) which is fed into the secondary winding of a power transformer . 2. TRANSFORMER: Here the applied oscillating voltage is stepped up per ratio of...

Transformer Basics Transformers are electrical devices consisting of two or more coils of wire used to transfer electrical energy by means of a changing magnetic field One of the main reasons that we use alternating AC voltages and currents in our homes and workplace’s is that AC supplies can be easily generated at a convenient voltage, transformed (hence the name transformer) into much higher voltages and then distributed around the country using a national grid of pylons and cables over very long distances. The reason for transforming the voltage to a much higher level is that higher distribution voltages implies lower currents for the same power and therefore lower I^2*R losses along the networked grid of cables. These higher AC transmission voltages and currents can then be reduced to a much lower, safer and usable voltage level where it can be used to supply electrical equipment in our homes and workplaces, and all this is possible thanks to the basic V...

           CAPACITOR A capacitor is a two-terminal, electrical component. Along with resistors and inductors, they are one of the most fundamental passive components we use. You would have to look very hard to find a circuit which didn’t have a capacitor in it. What makes capacitors special is their ability to store energy; they’re like a fully charged electric battery. Caps, as we usually refer to them, have all sorts of critical applications in circuits. Common applications include local energy storage, voltage spike suppression, and complex signal filtering. Covered in this Tutorial In this tutorial, we’ll be examining all sorts of capacitor-related topics, including: How a capacitor is made *How a capacitor works *Units of capacitance *Types of capacitors *How to recognize capacitors *How capacitance combines in series and parallel *Common capacitor applications Symbols and Units Circuit Symbols There are two co...