We all use hand drills to decorate our home and take care of things. And electric drill is also divided into brush and brushless, what is difference, how to choose? Let's find out in this article.
Brush refers to a carbon brush that uses brush commutation to ensure normal motor operation; brushless does not have a carbon brush, uses a Hall sensor for commutation, and drive ensures normal operation. engine.
When a hand drill is energized, magnetic field cuts through wire and current flows through wire. The rotating magnetic field is rotor and cutting wire is stator. In order for rotor to generate a magnetic field, it is necessary to introduce an exciting current into rotor coil, and this role is played by a carbon brush.
Brush hand-held electric drills are relatively cheaper in price, simpler in structure, easier to operate, have larger starting current, faster starting, more torque at low speed, better loading effect, and stable speed regulation.
However, friction of carbon brushes easily generates electrical sparks, so in many cases they cannot be used. In addition, there is a certain amount of electromagnetic interference to outside world, it is prone to heat, efficiency is relatively low, and service life is short, frequent replacement of carbon brush is difficult.
Brushless hand drills use Hall sensors and drives instead of carbon brushes, no friction, low noise and a wide range of applications. It basically does not require any maintenance, has a relatively long service life, a relatively high control speed, and little interference to radio equipment. But price will be more expensive, and structure is more complicated than that of brush hand drill.
Both have their benefits and you can decide which one to choose according to your budget and lifespan.