What is a BLDC motor?

A brushless DC motor (BLDC) is a motor without brushes and commutators, also known as a commutatorless motor or a synchronous DC motor. The input terminal of BLDC is direct current, but in essence, the effect of alternating current is realized by cyclically switching the main switch of the inverter, so that the coil winding generates a changing magnetic field, and the motor rotor continues to rotate under the action of continuous torque.

When it comes to DC brushless motors, it must be mentioned that there are brushed motors. Brushed motors have a more annoying disadvantage, which is noisy. Because the brushes and the commutation ring need to rub against each other all the time to power the armature.

Therefore, if you want a quiet industrial fan, a product that uses a brushed motor maybe is not a good choice.

And the brush has been used for a long time and is easy to damage. When the current is high, you can even see the brushes crackling and sparking when they change direction.

But the brushless DC motor will have none of these shortcomings which will be a good choise for a quiet industrial fan.

The biggest feature of a Brushless DC motor is brushless, which means no brushes. Just because there are no brushes, which avoids the shortcomings of brushed motors.

So the brushless DC motor main advantages are:

• Long service life

• Low noise

• High efficiency (low loss, super energy saving)

• Small size

• High stability

  
  

1. The speed range of the brushless DC motor is widely used which can run at full power at any speed.

2. Outstanding overload capacity and high operating efficiency.

3. Compared with brushed motors, brushless DC motors have a smaller size, wider application range and higher power density.

4. The driver is simpler.

5. The brushless DC motor has no mechanical commutator structure, and the inside is a fully sealed design, which will achieve dust-proof, oil-proof, smoke-proof and not burnt motor.

   

The disadvantages of BLDC motor:

The disadvantage of BLDC is that it is difficult to control and the price of the electronic speed control (ESC) is relatively high. the other one is that due to inductive reactance, BLDC will be accompanied by a jitter when starting, which is not as smooth as the start of a brushed motor. But this does not affect use.

Now electric tools and home appliances have replaced the original brushed motors with brushless motors. Brushless motors can achieve tens or hundreds of kilowatts and are widely used in many fields such as aircraft models, medical equipment, home appliances, the Industry area and electric vehicles.