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Which works better, brushless motors or brushed motors?

While brushed motors offer the advantages of low cost and simple control, brushless motors present clear advantages in many applications due to their longer service life, higher efficiency, lower noise and reduced maintenance requirements.

There are many differences between brushed motors and brushless motors. The 'brush' in brushed and brushless refers to carbon brushes, which are not present in brushless motors but are used in brushed motors.

Service Life

  1. Brushless motor: Brushless motors can work continuously for about 20,000 hours, with a typical lifespan of 7-10 years.
  2. Brushed motor: Brushed motors can work continuously for about 5000 hours, with a normal lifespan of 2-3 years.

Efficiency of use

Brushless motor can run at high speed per second, with high efficiency. However, brushed motors have carbon brushes inside, so they are lower in speed and efficiency.

Energy saving aspect

Compared with brushed motors, brushless motors do not have carbon brushes, and their power consumption is only one-third of that of brushed motors. The carbon brushes of brushed motors alternate between connection and disconnection with the coil terminals, causing electrical sparks, electromagnetic interference, and disturbances to electronic devices.

Noise and Service Life

The noise of brushed electric motors is much higher than that of brushless electric motors, and as the carbon brushes wear out in the future, the noise of brushed electric motors will also increase, while brushless motors will not be affected as they do not have brushes.

Maintenance aspect

After the wear of the brushed motor, not only the carbon brushes need to be replaced, but sometimes also the accessories around the motor, such as the rotating gears, which can be more troublesome to replace. Typically, brushless motors use electronic commutation instead of mechanical commutation, which is technically superior to brushed motors. At the same time, brushless motors do not have gears or reduction gears, reducing the unreliability of motor wear. Within a certain current range, their efficiency is higher than brushed motors. In addition, brushless motors operate almost silently, and their general lifespan can exceed 10 years.


Of course, brushless motors themselves are more expensive, controllers are more complex, and costs are higher. However, currently, compared to brushed motors, brushless motors will become more and more mainstream in the market. In the actual production process, the gears of brushed DC motors are prone to wear, but brushless motors have powerful power and strong climbing ability. Brushless DC motors eliminate the hassle of replacing carbon brushes within two to three years. However, the price of brushless motor controllers is also higher. On the other hand, although brushed DC motors require carbon brush replacement, the replacement is very easy, and the motor control is relatively simple, with smooth operation and high safety factor. You can choose the appropriate brushed motor or brushless motor according to your needs.

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