Types of speed control of dc motor

DC motor speed control can be achieved by varying flux, armature voltage. One of the important features of DC motor is that its speed can be controlled with relative ease. Series-Parallel Control Method: This type of the method can be widely used in electric traction, where two or more mechanisms coupled series motors . There are three speed control motor product groups.

Such type of control is impossible in an AC motor.

The concept of the speed regulation is different from the speed control.

In speed regulation, the speed of the motor changes naturally whereas in dc motor the speed of the motor changes manually by the operator or by some automatic control device.

The different methods of speed control in DC shunt motors are explained below, 1. This method is very frequently used because it is very simple and economic. Along with the shunt field winding an adjustable resistance is connected in . In this type (Figure 1) the field is in series with the armature. This type of DC motor is only used for direct coupling and other work where the load (or part of the load) is permanently coupled to the motor.

This will be seen from the speed -torque characteristic, which shows that on no . Direct current motor speed control is vital when consider on industrial applications. The speed controlling methods of one type of direct current motor is different one by another. Speed of direct current motors are directly . But using field and armature rheostat control method we can make it more versatile.

Field rheostat provides above normal speed and armature rheostat provides wide range of below normal speed. So applying both methods simultaneously, we can . Small DC motors are used in tools . Project on Speed control of DC Machine ( Electrical Engineering). So speed can be controlled above base speed It is constant power speed control. The torque-speed characteristic of the motor must be adapted to the type of the load it has to drive, and this requirement has given rise to three basic types . In this video the DC Shunt motor operation is explained using two methods of speed control. Field control and other one is Armature control.

In field control method the speed of the motor gets varied along with variation in field current due to variation of flux induced in field . Lecture series on Power Electronics by Prof. Gopakumar, Centre for Electronics Design and Technology, IISc Bangalore. KB offers models of Variable Speed DC Drives that cover the most popular voltages and horsepower ranges for DC Motor Speed Control , DC Drive Acccessories, and DC Motor Controllers.