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Why are Brushless Motors better than Brushed Motors?

mark-liuMark Liu wrote 11/28/2023 at 03:27 • 2 min read • Like

The reasons why brushless motors are better than brushed motors are as follows:

1. Brushless motors run faster than brushed motors

With brushed and brushless motors having the same rating, the brushless motor will be faster because it is more efficient than the brushed motor. Because the speed of a brushless motor depends on the bearings and the motor's speed controller. Since it has no brushes, it has less friction and generates less heat, which allows a brushless motor to reach optimal speeds, whereas a brushed motor's speed is limited by the motor's brushes and commutator.

2. Brushless motors are more efficient

The efficiency of brushless motors can reach more than 85% to 90%, and the efficiency of brushed motors can reach 75% to 80%. Since there are no brushes in brushless motors, mechanical energy losses are low, allowing efficient use of the supplied energy. This is why brushed motors are less efficient than brushless motors.

3. Brushless motors have longer service life

Brushless motors have over 10,000 hours of runtime. Brushed motors wear out faster than brushless motors because brushed motors contain a commutator and brushes, which cause mechanical and electrical friction between them during operation. Over time, motors and brushes experience wear due to galvanic corrosion.

4. The brushless motor makes less noise when working.

Motors with more moving parts can cause more mess or noise due to friction, loose screws, etc. Brushless motors are quieter than brushed motors due to the electrical and mechanical noise generated by friction with the commutator. In brushless motors, there are no moving parts that can cause friction or other noise. This is why brushless motors are quieter compared to other motors.

5. Brushless motors are more reliable

The service life of brushless motors is much longer than that of brushed motors. Brushless motors are more reliable because they have few moving parts and therefore have less friction, energy loss, electrical or mechanical power loss, noise, wear, etc. These are the benefits of having few moving parts in the motor, which helps extend the life of the motor and makes it smaller, more compact, lighter, more efficient, etc.

Of course, this does not necessarily mean that you must choose a brushless motor. In reality, we should choose the appropriate motor based on actual needs.

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