The difference between brushless motor and carbon brush motor.

The difference between brushless motor and carbon brush motor.

1. Scope of application

Brushless motor: Brushless motors are usually used in equipment with high control requirements and high speed, such as aircraft models, precision instruments and meters, which strictly control the motor speed and achieve high speed.
Carbon brush motor: Carbon brush motors are commonly used in power equipment, such as hair dryers, factory motors, household range hoods, etc. In addition, series motors can also achieve high speeds, but due to the wear of carbon brushes, their service life is not as long as brushless motors.

2. Service life

Brushless motor: Brushless motors usually have a service life of tens of thousands of hours, but due to different bearings, the service life of brushless motors also varies greatly.
Carbon brush motor: Carbon brush motors usually have a continuous working life of several hundred to over 1000 hours. When the limit of use is reached, the carbon brush needs to be replaced, otherwise it is easy to cause bearing wear.

3. Usage effect

Brushless motor: Brushless motors are usually controlled by digital frequency conversion, with strong controllability. They can easily achieve speeds ranging from a few revolutions per minute to tens of thousands of revolutions per minute.
Carbon brush motor: The old carbon brush motor of the carbon brush motor generally has a constant working speed after starting, and speed regulation is not very easy. Series excited motors can also reach 20000 revolutions per minute,
But the service life will be relatively short.

4. Energy saving aspect

Relatively speaking, brushless motors controlled by variable frequency technology are much more energy-efficient than series motors, with the most typical being variable frequency air conditioners and refrigerators.

5. In terms of future maintenance, carbon brush motors need to have their carbon brushes replaced. Failure to replace them in a timely manner can cause damage to the motor, while brushless motors have a long service life, usually more than 10 times that of brushed motors. However, if they break down, the motor needs to be replaced, but daily maintenance is basically not necessary.

6. The noise aspect is not related to whether there is a brushed motor, but mainly depends on the fit between the bearings and the internal components of the motor. Brushless motor has almost no noise
7. The parameter indicators of a model brushless motor, in addition to external dimensions (outer diameter, length, shaft diameter, etc.), weight, voltage range, no-load current, ****** current, etc., also include an important indicator - KV value, which is a unique performance parameter of brushless motors and an important data for judging their performance characteristics.