Transformer Equivalent Circuit is the electrical circuit representation of equations describing the behavior of Transformer. In fact equivalent circuit of any electrical device is necessary for its performance analysis and to find any scope of further design modification. The equivalent circuit of a transformer consists...
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June 5, 2018 admin
Electrical Machines
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Out of all the electrical machines, Induction Motor is the most used machine in industries. More than 90% of motors used in industries are squirrel cage induction motor due to its rugged and maintenance free design. Generally an Induction Motor operates at almost constant speed...
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June 5, 2018 admin
Electrical Machines
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Stator Voltage Control of Induction Motor is a method for the speed control of induction motor by changing the stator terminal voltage. Stator terminal voltage in this method is changed either by adding a series resistor, series inductor or auto transformer in stator circuit. But...
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June 2, 2018 admin
Electrical Machines
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Slip in Induction Motor is the relative speed between the rotating magnetic flux and rotor expressed in terms of per unit synchronous speed. It is a dimensionless quantity. The value of slip in induction motor is can never be zero. If Ns and Nr being...
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June 1, 2018 admin
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The main difference between step-up and step-down transformer is that, step-up transformer increases the voltage whereas a step-down transformer decreases the voltage. The secondary voltage of step-up transformer is more than that of its primary voltage whereas the secondary voltage of step-down transformer is less...
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May 31, 2018 admin
Electrical Machines
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The main difference between Core type and Shell Type Transformer is the constructional difference of their core and winding arrangement. In core type transformer, the magnetic core consists of two limbs and two yokes whereas in Shell type transformer, there are three limbs and two...
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May 30, 2018 admin
Electrical Machines
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Transformer is an electromagnetic device that transfers electric power from one circuit to another at a constant frequency. It step-up or step-down the voltage level from one circuit to another at almost constant power. As, voltage transformation take place at a constant power, there is...
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May 29, 2018 admin
Electrical Machines
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There are mainly two types of transformer from core construction point of view: Core Type Transformer and Shell Type Transformer. A transformer can be classified into various types based on core construction, winding design, application, cooling medium and power supply to which it is connected. . In core...
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May 28, 2018 admin
Electrical Machines
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Definition of Transformer: Transformer is a device which transfers electrical energy from one circuit to another through the medium of magnetic field and without change in the frequency. The electrical circuit which receives electrical power from the source is called the primary winding and another...
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May 27, 2018 admin
Electrical Machines
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Rotor resistance control is one among the various methods for the speed control of induction motor. In this method of speed control, the rotor circuit resistance is varied by connecting a variable external resistance. This method is only applicable for slip ring or wound rotor...
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May 26, 2018 admin
Electrical Machines
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