Difference between brushed DC motor and brushless DC motor

2024-06-27 14:48:21 admin

1. Scope of application

Brushless motor: It is usually used in equipment with relatively high control requirements and relatively high speed, such as aircraft models, precision instruments and meters, etc., which have strict control over the motor speed and high speed.

Brushed motor: Usually, power equipment uses brushed motors, such as hair dryers, factory motors, household range hoods, etc. In addition, the speed of series motors can also reach very high, but due to the wear and tear of carbon brushes, the use of lifespan is not as good as brushless motors.

2. Service life

Brushless motor: Usually the service life is on the order of tens of thousands of hours, but the service life of brushless motors is also very different due to different bearings.

Brushed motor: Usually, the continuous working life of a brushed motor is several hundred to more than 1,000 hours. When the limit of use is reached, the carbon brush needs to be replaced, otherwise, it is easy to cause wear of the bearing.

3. Use effect

Brushless motor: usually digital frequency conversion control, strong controllability, from a few revolutions per minute to tens of thousands of revolutions per minute can be easily realized.

Brush motor: The old carbon brush motor generally works at a constant speed after starting, and the speed regulation is not very easy. The series motor can also reach 20,000 rpm, but the service life will be relatively short.

4. Energy saving

Relatively speaking, brushless motors controlled by frequency conversion technology will save a lot of energy than series motors. The most typical ones are frequency conversion air conditioners and refrigerators.

5. Future maintenance

The brushed motor needs to replace the carbon brush. If the replacement is not timely, the motor will be damaged. The brushless motor has a long service life, usually more than 10 times that of the brushed motor. However, if it is broken, the motor needs to be replaced, but the daily maintenance is basically unnecessary.

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