The very basic construction of a dc motor contains a current carrying armature, connected to the supply end through commutator segments and brushes. In this lesson we discuss speed and position control. The armature is placed in between north pole and south pole of a permanent or an electromagnet as shown in the diagram above. Lecture 16 dc motor speed control introduction youtube. Electrical drives these are direct current dc or alternating current ac servo motors. Mod01 lec21 lecture21operating principles of dc machines.
This chapter gives the motivation behind using direct current machines and its application in various. Lecture series on basic electrical technology by prof. Mukhopadhyay, department of electrical engineering, iit kharagpur. As soon as we supply direct current in the armature, a mechanical force acts on it due to the electromagnetic effect of. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Lesson 3 understanding and using dc motor specifications. Learners study the interaction between the conductors of the stator and the armature inside a dc motor, which causes the shaft to. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. Types of dc motors dc motor are of 3 types they are 1. Working or operating principle of dc motor electrical4u.
Brushed dc motors, despite their mechanical complexity, are governed by only a few forces. Debaprasad kastha, department of electrical engineering, iit kharagpur. Subhajit bose03 shuvankar das02 binoy mourya09 sushobhan sarkar06 prosenjit debnath35 3. Understanding and using dc motor specifications gears educational systems 105 webster st. For servo drive applications, dc motors are still used, although they are also being replaced by bldc motors. Brushed dc motor fundamentals microchip technology. Lecture series on industrial automation and control by prof. An905 ds00905bpage 2 2010 microchip technology inc. First, a look at an incredibly simpli ed motor, a square loop in a magnetic eld, as shown in figure 1. Motor control rss lecture 3 monday, 7 feb 2011 prof. In this lesson aspects of starting and speed control of d. Its operation is based on the principle that when a current carrying conductor is placed in a. Let us now solve some problems on shunt, separately excited and series motors.