Technical Editor, Author at Polytechnic Hub

Energy conservation in electrical motors

Energy costs continues to increase due to ever increasing global demand for energy. Industrial sector is awakening in order to reduce cost of production after the markets has the been…

Technical Editor February 3, 2018

Electrical Articles

What is energy conservation

Energy conservation simply means to reduce the growth of energy consumption by avoiding unnecessary usage of energy. Conserving energy helps the planet and saves money—so why don’t more people make…

Technical Editor February 2, 2018

Electrical Articles

Various types of starters are as follows: Stator resistance starter. Star delta starter. Autotransformer starting. Rotor resistance starters. Variable stator frequency starting. Stator resistance starter A starter resistance is connected…

Technical Editor January 29, 2018

Electrical Articles

Comparison of Induction motor and DC motors

Parameter DC motors Induction motors Supply DC AC Maintenance Frequent Less frequent Speed Low High Size and weight Large Small Speed control Rheostatic control, field control Stator voltage control, stator…

Technical Editor January 29, 2018

Electronics Articles

Construction of 3-phase induction motor

Construction : Conversion of electrical power into mechanical power takes place in the rotating part of an electric motor. In A.C. motors, rotor receives electric power by induction in exactly…

Technical Editor January 28, 2018

Electrical Articles

Parts of induction motor

A table showing the different parts of motor, the material used for the parts and function of the parts : Parts Material Function Stator frame Case iron Supports the core,protects…

Technical Editor January 28, 2018

Electrical Articles

Wind tree

Wind Tree, as we can guess from the name, is a wind turbine that looks like a tree. But, that is just a speck of this unconventional wind turbine’s definition.…

Technical Editor January 27, 2018

Electrical Articles

Principal of CRT (Cathode ray tube)

Principal of CRT : It consists of an electron gun. The electron gun produce an electron beam. The beam is narrow and is allowed to pass down the tube, and…

Technical Editor January 27, 2018

Electrical Articles

Advantages and disadvantages of digital multimeter

Following are the advantages of digital multimeter : They are having high input impendence, So there is no loading effect. They are having higher accuracy. An unambiguous reading is obtained.…

Technical Editor January 25, 2018

Electrical Articles

Ohmmeter

The meter which measures the resistance and the continuity of the electrical circuit and their components such type of meter is known as the ohmmeter. It measures the resistance in ohms. The range…

Technical Editor January 24, 2018