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Working Principle Of Electric Motor Jan 15, 2020

Working principle of electric motor

The principle of motor rotation is based on John Ambrose Fleming's left-hand rule. When a wire is placed in a magnetic field, if the wire is energized, the wire will cut the magnetic field line and cause the wire to move. A device that generates a magnetic field when the current enters the coil, and uses the magnetic effect of the current to make the electromagnet continuously rotate in a fixed magnet, which can convert electrical energy into mechanical energy. Interacting with a permanent magnet or a magnetic field generated by another set of coils to generate power. The principle of a DC motor is that the stator does not move, and the rotor moves in the direction of the force generated by the interaction. The alternating current motor is the stator winding coils which are connected with alternating current to generate a rotating magnetic field. The rotating magnetic field attracts the rotor to rotate together. The basic structure of the direct current motor includes "armature", "field magnet", "collector ring", and "brush".

Armature: A soft iron core that can rotate around the axis to wind multiple turns of the coil. Field magnet: A strong permanent or electromagnet that generates a magnetic field. Collector ring: The two ends of the coil are connected to two semicircular collector rings, which can be used to change the direction of the current as the coil rotates. Every half turn (180 degrees), the direction of the current on the coil changes. Brush: Usually made of carbon, the slip ring contacts a fixed position of the brush to connect to the power supply.