How electric motors work: Magnetism

Electric motors are an important part of countless machines and equipment we use in our daily lives. From powering industrial machinery to driving cars and even in everyday household appliances, electric motors are at the heart of much modern technology. At the heart of how electric motors work is the fascinating and fundamental force of magnetism.


Magnets play a key role in the operation of electric motors. These powerful objects generate a magnetic field around them, and it is this magnetic field that interacts with the electric current to create motion. In particular, bar magnets and electromagnets are essential elements for the operation of electric motors.


A bar magnet is simply a straight piece of magnetic material with a north and south pole. When a bar magnet is placed near an electric current, it creates a magnetic field around it. This magnetic field interacts with the current-carrying conductors in the motor, causing them to experience a force and move accordingly.


Meanwhile, electromagnets are made by wrapping a coil around a core material, such as iron, and then passing an electric current through the coil. This creates a magnetic field around the coil, and the core material increases the strength of the magnetic field. Electromagnets are widely used in electric motors because they provide greater flexibility and control of the magnetic field.


The interaction between magnetic fields and currents is the essence of how electric motors work. Simply put, when an electric current passes through a conductor in the presence of a magnetic field, a force is exerted on the conductor, causing it to move. This motion drives the mechanical action of an electric motor, whether it’s spinning a fan, propelling a vehicle, or operating a cutting tool.


Understanding magnetism is crucial to understanding how electric motors operate. Magnetism is the force that creates the magnetic field that drives the movement of a motor. This force is also why bar magnets and electromagnets are an important part of electric motor design.


In summary, the working principle of an electric motor is based on magnetism. Whether through the use of bar magnets or electromagnets, the generation of a magnetic field and its interaction with electrical current allow an electric motor to perform its basic function. As technology continues to advance, the understanding and application of magnetism in electric machines will continue to play a central role in shaping the world around us.

Post time: Feb-02-2024