Do you often hear some words like brushless motor, brushed motor when professionals talk about electric drills? Is it very doubtful, right? What’s this? In fact, the so-called brushed and brushless electric drills refer to the difference in motors, it means brushed and brushless motors. Their working principles are different.
Brushed motor adopts mechanical commutation, the magnetic pole does not move, and the coil rotates. In short, the carbon electrode slides on the coil terminal, like a brush on the surface of the object, so it is also called carbon "brush". Sliding with each other will rub the carbon brushes and cause wear and tear. So the carbon brushes need to be replaced regularly. What’s more, the switching between the carbon brushes and the coil terminals will cause electric sparks and electromagnetic wave which interference with electronic equipment.
The brushless motor adopts electronic commutation, the coil does not move, and the magnetic pole rotates. It is a typical mechatronics product which eliminates the disadvantage of brushed motors.
Disadvantages of Brushed Motor:
1. Great Friction and Loss
After using the motor for a period of time, it is necessary to open the motor to clean the carbon brush, which is time-consuming and laborious, this is no less than a home cleaning each time.
2. Large Heat and Short Life
Due to the structure of the brushed motor, the contact resistance between the brush and the commutator is very large, which causes the overall resistance of the motor to be large and easy to generate heat. The permanent magnet is a thermal element. If the temperature is too high, the magnetic steel will demagnetize. The performance of the motor is reduced. This will affect life of brushed motor.
3. Low Efficiency and Low Output Power
The heat problem of the brushed motor mentioned above is largely caused by the current is done on the internal resistance of the motor, so the electrical energy is converted to heat to a large extent, so the output power of the brushed motor is not high and the efficiency is low.
Advantages of brushless Motor:
1. No Electric Brush and Low Interference
The brushless motor removes the brush, the most direct change is that there is no electric spark generated when the motor is running, which greatly reduces the interference of the electric spark to the remote control radio equipment.
2. Low Noise and Smooth Operation
The brushless motor has no brush, so the friction is greatly reduced during operation, it is smooth and the noise is much lower.
3. Long Life but Low Maintenance Cost
From a mechanical point of view, the brushless motor is almost a maintenance-free motor. When necessary, only needs to do some dust removal maintenance.
From all above, now you may have a clear understanding of brushed and brushless motor drill. It is clear that brushless drill has more advantages than brushed drill. But you may also curious about the price difference between these two motor types. It is obviously that the brushless drill cost more than the brushed drill. Is it cost-effective for me to get a brushless drill for home Maintenance & DIY ?
The answer is yes. You deserve a brushless cordless drill for your home very much. Because it has convenient operations, longer use time and good performance. There is a big price difference of brushless drill between different brands. Price of famous brand is much higher than smaller brands. To select a reasonable drill for your home, you can go for smaller brands for a brushless drill with better price. This will not cost much than brushed drill if you go for the right brands.