Torque Equation For DC Motor

Torque Equation for DC Motor Torque is a rotational force that helps for rotating the armature of DC motor. Torque is produced by electromagnetic effect. In simple words we can say that, when a conductor carrying current placed in a magnetic field or flux a mechanical force experienced by the conductors and conductor moves in […]

EMF Equation for DC Machine

EMF Equation for DC Machine DC machine may be either works as a dc motor or dc generator. EMF equation is important for both. In case of DC generator an induced emf is called generated emf and in case of DC motors generated emf is called Back or Counter emf  The DC generator is rotate […]

Speed Control of DC Series Motor

Speed Control of DC Series Motor The Speed control of dc series motor can be obtained by changing the field, called field control method and by changing the back emf is called armature control method. Flux or Field Control Method In this method , the speed varied by  changing the field or flux. The following […]

Speed Control of DC Shunt Motor

Speed Control of DC Shunt Motor We Know that, the operating characteristics of dc shunt motor is same as the phase induction  motors. But speed of motors can not be changed easily in case of three phase induction motors. So that, where speed control of motor is required in  that cases dc shunt motor is […]

DC Motor

DC Motor DC motor is a electrical machine which converts electrical energy into mechanical. There are three types of dc motors which are employed at various industrial applications. The dc motors are classified on the basis of connection of field winding with respect to armature. Most important application of dc motor found in traction system. […]

Characteristics of DC Series Motors

Characteristics of DC Series Motors The performance of DC motor can observe by its operating characteristics curve is called motor characteristics. In this article we will discuss about characteristics of DC series motors. Speed Armature Current (N-Ia) Characteristics The speed of a dc series motor given by the relation. Where is back emf and its […]

Characteristics of DC Shunt Motors

Characteristics of DC Shunt Motors In case of dc shunt motors, for constant supply voltage, the field current is constant. Hence, the flux in dc shunt motors is practically constant. In this article,we will discuss about various characteristics of dc shunt motor. Speed Current (N-Ia) Characteristics The speed of dc motor is directly proportional to […]

Necessity of Starter for DC Motors

Necessity of Starter for DC Motors In this article we will discuss about necessity of starter for dc motors. The starting of DC motor is not preferred with the use of starter. In case of DC motor starter contains resistance which limits the starting current and protective device such as over load relay, no volt […]

Construction of DC Machine

Construction of DC Machine DC machine consists of two main parts. One of them is armature and other is field system. The field system is stationary part of the dc machine and armature is rotating part.The construction of dc generator and dc motor is same. The Name of the parts  and function of these parts […]

Applications of DC motors

Applications of DC motors Different types of dc motors are available. These motors are used in different places. Applications of dc motors are as follows:- Separately Excited DC Motor We can obtain very accurate speed by using separately excited DC motors. So this motor is most suitable for the applications requiring speed variation from very […]