Brushless Dc Motor For Ceiling Fan Application

In a typical dc motor there are permanent magnets on the outside and a spinning armature on the inside.

Brushless dc motor for ceiling fan application.

A typical current waveform is shown in figure 2 below. Fans with brushless dc motors have their own built in permanent magnets made of rare metals. In this paper the mathematical analysis and fe analysis of brushless dc motor for ceiling fan application is carried out and the results were analyzed in the previous chapter. A brushless dc motor consists of a rotor in the form of a permanent magnet and stator in the form of polyphase armature windings.

Brushless dc motors were made possible by the development of solid state electronics in the 1960s. An electric motor develops torque by keeping the magnetic fields of the rotor the rotating part of the machine and the stator the fixed part of the machine misaligned. Because they do not require electricity to create a magnetic field they use 3 to 5 times less electricity than your typical ceiling fan that has an ac motor. The permanent magnets are stationary so they are called the stator the armature rotates so it is called the rotor.

Construction working applications of bldc brushless dc motor brushless dc motors bldc have been a much focused area for numerous motor manufacturers as these motors are increasingly the preferred choice in many applications especially in the field of motor control technology. What may not be understood is the current draw from this fan is not a dc current. Bldc motors are superior to brushed dc motors in many ways such as ability to operate at high speeds high. A dc motor uses an internal array of magnets of opposing polarity.

Brushed dc motors were invented in the 19th century and are common. The specific type of dc motor used in ceiling fans is a brushless dc motor aka synchronous dc motor. It differs from the conventional dc motor in such that it doesn t contain brushes and the commutation is done using electrically using an electronic drive to feed the stator windings. About dc motor ceiling fans.

The armature contains an electromagnet when you run electricity into this electromagnet it creates a. Fan motors that use up to 75 less electricity. This creates a magnetic field that creates the torque required to rotate the motor s rotor. Current draw by a dc fan motor.

From the analysis it is concluded that the axial flux permanent magnet brushless dc motor will consume less power for same airflow such that 30 w.