Found 177 Articles for Power Systems

An electrochemical process that removes material from a metallic workpiece is known as electropolishing. It is also known as electrochemical polishing or electrolytic polishing.Electro-polishing uses a combination of rectified current and a blended chemical electrolyte bath to remove flaws from the surface of a metal part. Electropolishing is often described as the reverse of electro-plating.Process of ElectropolishingThe schematic arrangement for the electropolishing is shown in the figure.In electro-polishing, the metallic workpiece is immersed in a temperature controlled bath of electrolyte and serves as the anode as it is connected to the positive terminal of a DC power supply.The negative terminal ... Read More

What is Electrodeposition?An electrolytic process by which one metal is deposited over other metal or non-metal is known as electrodeposition.Electrodeposition is widely used for decorative, protective and functional purposes. The process of electrodeposition includes −Electroplating − It is the process of deposition of metal over any metallic or non-metallic surfaces for protecting the metals from corrosion.Electro metallization − It is a process by which a metal can be deposited on a conducting base for decorative or protective purposes.Electro typing − It is a process used to reproduce printing, set up typing and medals, etc.Electro forming − It is a process ... Read More

Electric TractionThe action of pulling something over a surface (especially a road or a track) is known as traction. The action of drawing of vehicles by electric power derived from overhead wires, third rail, storage batteries or diesel generators mounted on the vehicles is known as electric traction. In simple words, the traction system which uses electric power for its operation is known as electric traction.The electric traction system is widely used in electric trains, tramcars, trolley buses and hybrid vehicles, etc.Advantages of Electric TractionThe major advantages of electric traction system over other types of traction (such as steam traction) ... Read More

The combination of an electric motor, energy transmitting shaft and control devices for motion control is known as electric drive. The following figure shows the block diagram of a typical electric drive.Based on their assembly, electric drives can be of the following three types −Individual DriveGroup DriveMulti-motor driveIn this article, let's check the advantages and disadvantages of using an Individual Electric Drive.What is an Individual Electric Drive?When an individual machine is fitted with its own electric motor, then the electric drive is known as individual electric drive. In case of individual electric drive, each operator has complete control on his ... Read More

What is an Electric Drive?The combination of an electric motor, energy transmitting shaft and control device for motion control is known as electric drive. The following figure shows the block diagram of a typical electric drive.Based on their assembly, electric drives can be of the following three types −Individual DriveGroup DriveMulti-motor driveIn this article, let's check where exactly the electric drives are used and what are benefits and drawbacks of using electric drives.Advantages of Electric DriveThe advantages of using electric drives are listed below −Electric drives are environment friendly as they do not produce smoke, fumes, ash, etc. Therefore, electric ... Read More

What is an Arc Lamp?An Arc Lamp is a type of electric lamp that produces light by creating an electric arc in the gap between two electrodes when the electric supply is connected to these electrodes. The first arc lamp was invented by Sir Humphry Davy in 1807.Working Principle of Arc LampIn an arc lamp, two electrodes touching each other are connected to a source of electricity so that an electric current flows through the electrodes, as shown in Figure-1.Now, if the two electrodes are separated a bit from each other, even then they carry an electric current and in ... Read More

What is Anodizing?The process of deposition of an oxide film on a metal surface is known as anodizing. The anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal workpieces.Anodizing of AluminiumAluminium alloys are anodized for the following reasons −To increase the corrosion resistance.To increase the surface hardness.To allow coloring or dyeing.To improve lubrication.To improve adhesion.When the pure aluminium is exposed to air at room temperature or any other gas containing oxygen, it self-passivates by forming a surface layer of amorphous aluminium oxide of thickness of 2 to 3 ... Read More

The combination of an electric motor, energy transmitting shaft and control devices for motion control is known as an electric drive. The following figure shows the block diagram of a typical electric drive.Based on their assembly, electric drives can be of the following three types −Individual DriveGroup DriveMulti-motor driveIn this article, let's check the advantages and disadvantages of using a multi-motor drive.Multi-motor DriveA mechanism in which separate motors are used for operating different parts of the same machine is known as a multi-motor electric drive.The block diagram of a multi motor drive is shown in the figure below.Advantages of Multimotor ... Read More

LASER stands for Light Amplification by Stimulated Emission of Radiation. A LASER is a source of light which produces a very narrow beam of light that is useful in many technologies and instruments.Construction and Working of LASERThe construction of a typical red LASER is shown in the figure.It contains a long crystal of made ruby with a flash tube (which is not shown for simplicity, instead directly pump light is shown) wrapped around it.Here, a high voltage electric power supply makes the tube flash on and off. When the tube flashes, it pumps energy into the ruby crystal. The flashes ... Read More

The irregularities formed in the given weld metal due to wrong welding process or incorrect welding patterns, etc. are known as welding defects.The following table elaborates the different types of welding defects, their causes, and how to prevent these defects −The irregularities formed in the given weld metal due to wrong welding process or incorrect welding patterns, etc. are known as welding defects.The following table elaborates the different types of welding defects, their causes, and how to prevent these defects −Welding DefectCauses of Welding DefectRemediesBlow holeToo fast cooling rate.Wet, unclear or damaged electrode.Too thick base metal.Long or short arc length.Rusted ... Read More