A motor fan works by using an electric motor to rotate a series of blades or vanes, which then circulate air within a space. The electric motor is powered by electricity, which is converted into rotational energy through the interaction of magnetic fields in the motor.
When electricity flows through the motor's coils, it creates a magnetic field that interacts with the magnetic field of the motor's permanent magnets, causing the motor's rotor (the rotating part of the motor) to turn. This rotational energy is then transferred to the fan blades, which spin and create a flow of air.
The fan blades are typically designed to have a curved shape, which allows them to move air more efficiently. As the blades rotate, they create a low-pressure area behind them, which draws air into the fan. This air is then propelled forward and out of the fan, creating a flow of air that can help cool a room or dissipate heat from a machine.
The speed at which the fan blades rotate is typically controlled by a speed controller or a series of resistors that regulate the amount of electricity supplied to the motor. This allows the fan to operate at different speeds, depending on the user's needs or the temperature of the space being cooled.