Electromagnetism : Brushless Motor

We seen many DC motors in our life. One motor you can easily find in your computer's motherboard, electronic amplifier, and any other electronic appliance. That is Brushless motor. What is DC Brushless Motor? Well you are here to find out. let's check it out!!!

Brushless DC motor are the motor run with electromagnetism without commutator and brush. So this motor can run without friction with high efficiency. 

Parts of Brushless Motor

1) Coil : Produce electromagnetic field.
2) Bearing : Reduce friction and run the motor smoothly
3) Magnet : Also know stator to produce magnetic field.
4) Hall sensor : used for switching, positioning, speed detection, and current sensing applications

how the brushless motor works?

Every brushless DC motor power by a electronic control unit to spin the motor. When the electronic control unit power the motor, it will energize the coils. the coil will produce electromagnetic field that will align with the permanent magnet. When there's too many coils are winded around the stator so the electronic control unit will energize the next coil to make spin the motor as soon it align with permanent magnet. Every time when the rotor spin according to the permanent magnet pole the next coil will energize to maintain the rotation.

 

Why brushless DC motor so efficient then brushed motor?

Brushless DC motor run without commutator and brush. So no friction,no sparks and no noise during operation of motor. This motor is less maintenance and low price. This kind of motor is used as coolant for computer,amplifier and so on. 

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