Tuesday, April 24, 2012
How a DC motor works?
(Image: DC Motor Principle)
The carbon rod shown in figure starts rotate when we turn on the current. As per motor principle we need two fluxes inside the motor. Here one flux is produced by magnet called stator flux and one more is produced by when dc current flows through conductor called rotor flux. The intersection these two fluxes makes a carbon rod to rotate.
We can find the direction of rotation of motor by using fleming’s left hand rule.