Er. S.PradhanSpeed control of DC motors can also be achieve by varying the applied voltage to the armature. Ward-Leonard System of speed control is based on this principle. The Ward-Leonard control system was introduce in 1891 by Harry Ward Leonard. So there are two types of voltage control methods, that is multiple voltage control method and … Read more
Speed control of DC motor : The DC motor speed controller controls the speed of any common DC motor rated up to 100V. It operates on 5V to 15V. The speed of a DC motor is given by the relation, Where, N = speed of the motor V = voltage across … Read more
First of all we will understand three important characteristics of a DC motor then we will understand in detail Shunt Motor, Series Motor and Compound Motor characteristics. But before that let us know what is motor characteristics. The performance of a DC motor can be judged its characteristic curves known as motor characteristics. The characteristic … Read more
In this article we will discuss armature torque and shaft torque. But before we discuss these two torques, let us first understand how is torque generate in a DC motor? The DC machine is loaded in the form of a motor or generator, so the rotor conductors carry the current, and these conductors are located … Read more
DC Motor – It is a machine which convert electrical energy to mechanical energy. We use DC motors to run the machine such as lathe machines, milling machines, trains, cranes and elevator. This was some information about DC motor. So let’s get more information about DC motor. DC motor principle A machine that converts DC (Direct … Read more
We have read about the different types of DC generators. We use different types of DC generators for a variety of purposes. So let us discuss some important applications of DC generator in this article. Separately excited DC generator application Separately excited generators are generally more expensive than self-excited generators because they require a separate … Read more
Generator characteristics gives the relation between terminal voltage and load current. It is of great importance in judging the suitability of a generator for a particular purpose. The characteristics of DC generator are explained below. DC generator characteristics The speed of a DC machine operating as a generator is fixed by the prime mover. For … Read more
There are two types of generators, one is DC generator and other is AC generator. So here we will discuss about the DC generator Construction, Working principle, Types, EMF equation, Losses. So let’s understand in detail. Principle of a generator An electrical generator is a machine which converts mechanical energy (or power) into electrical energy … Read more
Introduction of transistor tuned amplifier – An audio amplifier amplifies a wide band of frequencies equally well and does not allow the selection of a particular desired frequency while rejecting all other frequencies. Sometimes it is desired that an amplifier should be selective that is it should select desired frequency or narrow band of frequencies … Read more
Transistor biasing is required for proper operation of transistors in any circuit. The basic purpose of biasing is to keep the base emitter junction forward biased and collector base junction is reverse biased, during the application of signal. Define faithful amplification During amplification the magnitude of signal should increase and there should be no change … Read more
