DC Motor Working Principle
When a current carrying conductor is placed in a magnetic field, a mechanical force acts on it, which can be determined by Fleming’s left hand rule. Due to this force the conductor becomes mobile in the direction of the force.
DC Motor Working
Imagine that a current-free conductor (which is not connected to the supply) is placed in the main magnetic field the and without the magnetic field flowing through the conductor. Assume, there is an air gap from N pole to S pole.
Current is flowing in the conductor but the magnetic effect of N pole and S pole has been removed. In this situation the conductor will maintain its own magnetic field. The magnetic field lines of force of the conductor will be clockwise according to the cork screw rule.
Current is flowing in the conductor and main magnetic field is also present. The magnetic field produced due to the current in the conductor acts along with the main field above the conductor but opposes the main field below the conductor. The result is that flux accumulates in the region above the conductor and flux density reduces in the region below.
From this it is clear that when the force is acting on the conductor, it works to push the conductor downwards. If the direction of current in the conductor is changed, the flux will accumulate downwards and will try to move the conductor upwards.
DC Motor
DC motor is a machine that converts electrical energy of direct current into mechanical energy. In a DC motor, the input electrical energy is direct current which is converted into mechanical rotation.
In this article, we will learn what is DC motor, its Diagram, Construction, Working, types, and applications. We will also compare DC and AC Motors based on various parameters.
Table of Content
- What is DC Motor?
- Construction of DC Motor
- DC Motor Working Principle
- DC Motor Characteristics
- Types of DC Motors
- AC and DC Motors
- Applications of DC Motor