Types of Braking in a DC Motor

Hello Electrical people, you already know about the different types of motors that are available today and in this article, I shall discuss about the various techniques used to stop a DC Motor or to bring it to rest as we cut off the supply. Kindly see that the braking preferred to stop a DC … Read more

Hysteresis Motor

What is Hysteresis Motor? Hysteresis motor is defined as a synchronous motor that is having cylindrical rotor and works on hysteresis losses induced in the rotor of hardened steel with high retentivity. It is a single phase motor and its rotor is made of ferromagnetic material with non magnetic support over the shaft. What is … Read more

Variable Frequency Drive or VFD

It is interesting to know that the first A.C. drive (400 HP) based on thyratron cycloconverter-fed WRIM was installed in 1932 by F.E. Alexanderson of General Electric in the Logan Power Station of Pacific Gas and Electric Company. From then industrial drives have evolved rapidly by dedicated effort of many scientists and engineers all over … Read more

What is an Electrical Drive?

Whenever the term electric motor or electrical generator is used, we tend to think that the speed of rotation of these machines is totally controlled only by the applied voltage and frequency of the source current. But the speed of rotation of an electrical machine can be controlled precisely also by implementing the concept of … Read more

Classification of Electrical Drives or Types of Electrical Drives

The classification of electrical drives can be done depending upon the various components of the drive system. Now according to the design, the drives can be classified into three types such as single-motor drive, group motor drive and multi motor drive. The single motor types are the very basic type of drive which are mainly … Read more

Dynamics of Electrical Drives

When an electric motor rotates, it is usually connected to a load which has a rotational or translational motion. The speed of the motor may be different from that of the load. To analyze the relation among the drives and loads, the concept of dynamics of electrical drives is introduced. We can describe the dynamics … Read more

Servomechanism | Theory and Working Principle of Servo Motor

Servo Motor Working Principle Before understanding the working principle of servo motor we should understand first the basic of servomechanism. Servomechanism A servo system mainly consists of three basic components – a controlled device, a output sensor, a feedback system. This is an automatic closed loop control system. Here instead of controlling a device by … Read more

Electric Motor Power Rating

Power rating for electrical machines indicates the required supply voltage for smooth running of that machine, it also shows the permissible maximum amount of current which can easily flows through the machine and there will be a chance of breakdown in the machine if those parameters goes beyond this limit. Electric Motor Power Rating Similarly … Read more

Servo Motor Control

Servo Motor Control For understanding servo motor control let us consider an example of servomotor that we have given a signal to rotate by an angle of 45o and then stop and wait for further instruction. The shaft of the DC motor is coupled with another shaft called output shaft, with the help of gear … Read more