Before you discount the brushless screwdrivers as being needlessly expensive, you should find out how much they cost from various stores. Due to the increasing demand for these products, most of them will be a lot more affordable compared to the past. Besides, you can always shop for them online if you are looking for a better deal. They will definitely cost more than the regular screwdrivers, but not by much.
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Perhaps one of the biggest selling points of the brushless screwdrivers is the fact that they can automatically vary their speed to suit the type of work you are doing. For instance, if you are fastening Styrofoam, the device will note the softness of the material you are drilling into, and then reduce the speed to a more suitable level. This usually means that they end up using less power from the battery. The brushed screwdrivers dont do this; they usually run at maximum speed whatever the application they are used for.
Due to the fact that these types of screwdrivers are smarter, they end up consuming power in a more energy efficient manner compared to the brushed ones. As a result, you will find yourself not spending as much time charging them up. Conservative battery use also results in better longevity, which means that the maintenance costs of the device will be more manageable.
Brushless motors have fewer moving parts, which means that they have less power loss due to friction. As a result, they tend to be more powerful than the regular brushed screwdrivers. This in turn means that they are the better option for people who need the most out of their screwdrivers, and those who want as much precision as possible.
These are just a few of the benefits you are likely to gain from investing in the brushless screwdrivers. The key to benefitting from all the above and more is to simply make sure that you purchase a brand that has good quality.
The article How Electric Motors Work explains how brushed motors work in great detail. In a typical DC motor, there are permanent magnets on the outside and a spinning armature on the inside. The permanent magnets are stationary, so they are called the stator. The armature rotates, so it is called the rotor.
The armature contains an electromagnet. When you run electricity into this electromagnet, it creates a magnetic field in the armature that attracts and repels the magnets in the stator. So the armature spins through 180 degrees.
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To keep it spinning, you have to change the poles of the electromagnet. The brushes handle this change in polarity. They make contact with two spinning electrodes attached to the armature and flip the magnetic polarity of the electromagnet as it spins.
For more information, please visit Brushless Electric Screwdriver Manufacturer.
This setup works and is simple and cheap to manufacture, but it has a lot of problems:
The brushes eventually wear out.
Because the brushes are making/breaking connections, you get sparking and electrical noise
The brushes limit the maximum speed of the motor.
Having the electromagnet in the center of the motor makes it harder to cool.
The use of brushes puts a limit on how many poles the armature can have.
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If you are looking for more details, kindly visit Torque Electric Screwdriver.
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