Stepper motors are available in three basic configurations: 1. Universal Stepper Motor-A universal stepper motor can be connected as a bipolar or a uni-polar stepper motor. 2. Uni-polar Stepper Motor-A Uni-polar stepper motor can be used as uni-polar or a bipolar stepper motor. 3. Bipolar stepper Motor-A bipolar stepper motor can only be used as a bipolar. Bipolar Stepper Basics A bipolar…
A stepper motor drive is a circuit which is used to drive or run a stepper motor. It is often called a stepper motor driver. A stepper motor drive usually consists of a controller, a driver and the connections to the motor.A lot of drive circuits are available in the market today. Many circuits are so easy…
As the name suggests the synchronous motors rotates at synchronous speed. The main advantage of synchronous motors are that they run on 3 AC supply and DC supply is given to the rotor when they run on synchronous speed the loss is very minimal. We can say that if the synchronous motors are designed to run only…
Electrical drives have become the most essential equipment now days in the electrical motors and other rotating machines. We know that electrical drives mainly accomplishes three kinds of work, 1. Starting 2. Speed control 3. Braking It can be said that the electrical drives enable us to control the motor in every aspect. But control of electrical drives is also necessary…
A stepper motor is a type of DC motor that rotates in steps. When electrical signal is applied to it, the motor rotates in steps and the speed of rotation depends on the rate at which the electrical signals are applied and the direction of rotation is dependent on the pattern of pulses that is followed. A stepper motor…
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 of electrical drive easily by the following…
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 about the different operation…
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 the frequency of…
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. Whenever controlling of…
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 of motor duty class…