An amplidyne is an electromechanical amplifier with the characteristics of a rotating machine. It was invented prior to the second world war by Ernst Alexanderson. An amplidyne is a special-purpose DC generator. It comprises an electric motor that turns a generator on the same shaft. It supplies large currents, precisely controlled, to the large motors used to drive heavy … [Read more...] about Amplidyne – Working and Application
DC Generator
Voltage and Power Equations of DC Motor | Condition of Maximum Power
In this post, we will look at the voltage and power equation of a dc motor and the condition for maximum power in a dc motor. Voltage Equation of a DC Motor The voltage V applied across the motor armature has to overcome the back emf Eb and supply the armature ohmic drop IaRa . This is known as voltage equation of a motor. Back EMF and Its Significance in DC … [Read more...] about Voltage and Power Equations of DC Motor | Condition of Maximum Power
5 DC Generator Problems with Solution – Part 1
1. A shunt generator delivers 450 A at 230 V and the resistance of the shunt field and armature are 50 Ω and 0.03 Ω respectively. Calculate the generated e.m.f? Solution: The Generator Circuit is as shown in the figure, 2. A four pole generator having wave-wound armature winding has 51 slots, each slot containing 20 conductors. What will be the voltage generated in … [Read more...] about 5 DC Generator Problems with Solution – Part 1
Electric Potential, Potential Difference and EMF
In this article, you will study what are electric potential, the potential difference (PD) and electromotive force (emf) and the difference between them. Just as a body raised above the ground has gravitational potential energy, similarly, a charged body has electric potential energy. When a body is charged, work is done in charging the body. This work done is stored in the … [Read more...] about Electric Potential, Potential Difference and EMF
Working Principle of Alternator
The machine which produces 3 phase power from mechanical power is called an alternator or synchronous generator. The working of an alternator is based on the principle that when the flux linking a conductor changes, an emf is induced in the conductor. Alternators are the primary source of all the electrical energy we consume. These machines are the largest energy converters … [Read more...] about Working Principle of Alternator