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

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

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

Thermal Model of a Motor

We know that when an electrical motor and drive operates, there is a generation of heat inside the motor. The amount of heat generated inside the motor should be known as accurately as possible. That’s why thermal modeling of motor is necessary. The material of the motors and the shapes and size of the motors … Read more

Motor Duty Class and its Classification

Now a days, in almost every applications, electric motors are used, and to control them electrical drives are employed. But the operating time for all motors are not the same. Some of the motors runs all the time, and some of the motor’s run time is shorter than the rest period. Depending on this, concept … Read more

DC Motor Drives

Everywhere DC motors are used in large applications, the use of drives are very necessary for the smooth running and operating of these motors. The DC motor drives are used mainly for good speed regulation, frequent starting, braking and reversing. Before enlisting the practical applications of the drives used for DC motors, we will discuss … Read more

Induction Motor Braking Regenerative Plugging Dynamic Braking of Induction Motor

Induction motors are used at various places. Speed control of induction motors is quite difficult and that’s why their use was restricted and DC motors had to be used as their speed regulation was possible. But when induction motor drives were invented and implemented, they were given preference because of many advantages over DC motors. … Read more

Induction Motor Drives | Starting Braking Speed Control of Induction Motor

Before discussing about the induction motor drives we have to understand and know about induction motors. In very simple words induction motors can be described as a three phase, self starting constant speed AC motors. The reason of describing induction motors as constant speed is because normally these motors have a constant speed depending on … Read more