How Do Neodymium Magnets powered Motors Work?
Motors work like any other motor with a neodymium magnet, primarily based on Faraday’s law of electromagnetic induction. While there are several applications of AC motors, we will only explain how DC motors work since they form the basics for the functioning of engines in general.
The parts in a typical DC motor are:
Stator: this is the static unit that contains the winding. It is on the receiving end of the energy supply.
Rotor: this is the rotating part inside of a rotor.
Yoke: the yoke is the external frame that protects the motor’s inner parts from external force.
Poles: these are magnetic fields that fit into and are tightened to the yoke with screws.
Field Windings: these are made with copper wires. They are also known as the field coil. The windings form an electromagnet, and they can generate a filed flux when an electric current passes through them.
Armature Windings: the armature winding is attached to the rotor, and its job is to alter the magnetic field as it rotates.
DC Motor Commutator: the commutator turns the coils on and off, thereby controlling the direction of the electromagnetic field in the armature. It also converts the alternating voltage generated in the armature to DC.
Brushes (for brushed motors): only brushed motors have brushes. They are typically made of carbon or graphite, and their purpose is to bridge the space between the stator and the rotor.
A brushed DC motor has neodymium magnets on its structure, with a spinning armature on the inside.
The neodymium magnets, stationary on the outside, are part of the stator.
The armature contains an electromagnet called the rotor since it rotates.
In a brushed DC motor, when an electric current is run to the armature, the rotor spins 180 degrees. To go any further, the poles of the electromagnet must flip.
As the rotor spins, the brushes make contact with the stator, flipping the magnetic field and allowing the rotor to spin 360 degrees.
A brushless DC motor is a brushed DC motor flipped inside out but canceling the need for brushes to flip the electromagnetic field.
In a brushless DC motor, the neodymium magnets are on the rotor, while the electromagnets are on the stator. And a computer charges the electromagnets in the stator to rotate the rotor a full 360 degrees.