What is a brushless motor, and why is it marked as a good thing? Are “brushed motors” common?
In: 101
Brushed motors have a cheaper controller, but the trigger takes the full amps of the tool. A brushless motor means the controller needs a way to know the position of the rotor as it spins, so the controller can energize the proper electromagnet at the exact moment needed. They most often use Hall sensors.
This makes the brushless controller more complex and expensive, but…the best part is that the trigger can now be low voltage and low amps. When these cordless tools that are brushed will wear out, it’s most often the battery and the trigger.
Now, only the battery wears out, and even they last longer than before. Brushless tools will last longer, especially under heavy use.
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