Found 131 Articles for Utilization of Electrical Energy

Eddy Current HeatingWhen the heating of the charge is done by the induced eddy currents in charge, it is known as eddy current heating.To heat the charge by eddy current heating process, the charge is placed inside a current carrying coil. The current is the high frequency alternating current. For this reason, this method is also called the high frequency eddy current heating. The alternating magnetic field produced by the coil sets up eddy currents in the charge to be heated. Consequently, the charge gets heated-up. The coil used for creating the magnetic field is known as heater coil or ... Read More

Electric Resistance FurnaceThe resistance furnaces or ovens are the insulated closed chambers with a provision for ventilation. The resistance furnaces or ovens are used for heat treatment of metals, commercial or domestic heating, pottery work, etc.The different elements of the furnace can be energies from DC or AC supply of the rated voltage. The star-delta formation provides a wide variation of the temperature.In case of batch type resistance furnace, the charge is inserted in the furnace. The figure shows a typical batch type resistance furnace. Here, it is heated for a specific time at a specific temperature and then removed. ... Read More

Induction Heating FurnaceAn electrical furnace in which the heat is produced by induction heating of metal, is called the induction heating furnace. The induction heating furnaces have the capacities range from less than 1 kg to 100 tons and are used to melt various metals like iron, copper, aluminium, etc.Direct Core Type Induction FurnaceThe schematic diagram of a direct horizontal core type induction heating furnace is shown in the figure below.It works on the transformer action in which the charge to be heated forms a single-turn short-circuited secondary winding and it is magnetically coupled to the primary winding through iron ... Read More

An electric furnace is the furnace that heats materials by means of an electric arc is called the electric arc furnace (EAF).Direct Arc FurnaceThe direct arc furnace is the one in which the electric arc is struck between the electrode and the charge, to be heated, so that the arc current flows through the charge and there is a direct contact between the arc and the charge.In case of direct electric arc furnace, the heating process is faster and the heating efficiency is also high. In addition to the arc heating, some additional heat is produced by the passes of ... Read More

Metal Inert Gas (MIG) WeldingThe metal inert gas (MIG) welding is an electric arc welding process in which a continuous solid wire electrode is heated and fed into the weld pool from a welding gun. In case of MIG welding process, inert gas such as argon, helium, etc. is used as shielding gas to protect the weld pool from the atmospheric contamination.Tungsten Inert Gas (TIG) WeldingThe tungsten inert gas (TIG) welding is also an arc welding process in which the electric arc is struck between a non-consumable tungsten electrode and the workpiece. TIG welding is also known as Gas Tungsten ... Read More

Fusion WeldingThe welding process that uses heat to join (or fuse) two or more materials by heating them to their melting point is known as fusion welding. The fusion welding process may or may not require the use of filler material for welding. Examples of the fusion welding are arc welding, gas welding, resistance welding, etc.Solid State WeldingThe welding process in which two workpieces are joined under a pressure providing an intimate contact between them and at a temperature essentially below the melting point of the base materials is known as solid state welding. The materials being joined without the ... Read More

Welding is a process of melting and joining different types of materials together. There are several types of welding processes available that are used based on the types of materials being joined or melted. Two most extensively used types of welding are arc welding and gas welding. The fundamental difference between arc welding and gas welding is that arc welding uses electric current to produce heat for joining of metals, while the gas welding uses flammable gases to produce heat for welding process. Read this article to learn more about Arc Welding and Gas Welding and how they are different ... Read More

Coreless Induction FurnaceCoreless induction furnace, also known as high frequency induction furnace, is a refractory lined vessel surrounded by an electrically energized, current carrying, water-cooled copper coil. As its name implies, no core is provided in the coreless induction furnace.The electric current in the copper coil forms an electromagnetic field, generating heat energy that melts the charge.Construction of Coreless Induction FurnaceThe schematic diagram of a coreless type induction furnace is shown in the figure below.It has the following three main parts viz −Primary windingSecondary winding − The ceramic crucible containing the charge forms the secondary winding.Frame of the furnace − ... Read More

The process of heating in which a high-frequency alternating electric field or radio waves or microwave electromagnetic radiation are used to heat the dielectric materials is known as dielectric heating.Applications of Dielectric HeatingSince the dielectric heating is an expensive method of heating, therefore, it is only used where other methods of heating are not possible. Some of the applications of the dielectric heating are described as follows −Plastic IndustryThe plastic is used for making many appliances. If the pre-heating of the plastic is uniform, then the molding of plastic becomes faster and fault free. This pre-heating of the plastic is ... Read More

Induction Heating FurnaceAn electrical furnace in which the heat is produced by induction heating of metal, is called the induction heating furnace. The induction heating furnaces have the capacities range from less than 1 kg to 100 tons and are used to melt various metals like iron, copper, aluminium, etc.Vertical Core Type Induction FurnaceThe schematic diagram of the vertical core type induction furnace is shown in the figure below.The vertical core type induction furnace is also known as Ajax-Wyatt Furnace.This furnace has a vertical crucible instead of a horizontal one (as in case direct core type induction furnace) for the ... Read More