Types of starters
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 in each line series with each phase
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 frequency control. Applications Lathe machine,drilling and milling
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 the same way as the secondary of
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 inner-parts. Stator core Silicon steel Houses stator
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. Noisy, Monstrous, Nauseous, giant, unpleasant, bird scaring
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 to fall on the screen. The screen
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. The output can be interfaced with external
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 of a megger may extend to more
Introduction of CRO (cathode ray oscilloscope)
The most versatile tool which can be used for the development of electronic circuits and systems is the Cathode ray oscilloscope. It allows the amplitude of electrical signals, whether they are voltage, current or power, to be
Comparison between analog wattmeter and digital wattmeter
Analog Wattmeter Digital Wattmeter Due to moving parts there are losses and friction at bearings. As there are no moving parts,mechanical losses are reduced. Accuracy is less compared to digital wattmeters. Accuracy is high as compared to