The electric hand drill can be said to be a power tool that is frequently used in daily life. Although its power is relatively small, its operating accuracy is the highest among electric drills. It can drill general plastics, wood, ceramic tiles, and metals. . You can choose a lightweight hand drill with a cordless lithium battery, which is easy to carry and lightweight. Therefore, if it is only used as an electric tool for daily household use and does not require very large impact and destructive power, the hand electric drill is indeed the first choice and is very suitable for ordinary household use. Electric hand drills on the market are mainly divided into brushless and brushed ones. The brushed motor is mainly composed of a stator, a rotor, and a brush. It obtains rotational torque through a rotating magnetic field to output functions.
The difference between brushed motors and brushless motors is whether they have carbon brushes. In brushed motors, the carbon brushes and commutator are in constant contact and friction during rotation, which plays a role in conduction and phase commutation. Brushless motors use electronic commutation, the coil does not move and the magnetic pole rotates. The work of commutation in power tools is done by the control circuit in the controller, which is usually composed of a sensor and a controller, or more advanced magnetic encoder technology. Therefore, brushed motors start quickly, brake quickly, and regulate speed smoothly. However, due to the constant friction and braking between the carbon brushes and commutator plates, sparks, heat, noise and electromagnetic interference are easily generated, so the efficiency is low and the life is short. And carbon brushes are consumables and need to be replaced every once in a while.
However, it is widely used because of its low cost and high market acceptance rate. Brushless motors have the advantages of low noise, low failure rate, long service life, and can change the power switching angle to brake the motor, reverse or lock the motor, and use the brake signal to stop powering the motor. The brushless motor does not require post-processing. The maintenance cost of replacing carbon brushes is very low, and the only disadvantage may be that the price is relatively high. For ordinary consumers, after understanding this, I believe that through the above introduction, they already know what kind of electric hand drill is suitable for them. MAX POWER brand tools recommend that for household electric drills, choose one that is relatively lightweight, highly precise, has a cordless lithium battery, and is cost-effective.
