Share:

Motors that utilize direct current (DC) often fall under two categories: brushed and brushless. While the two are similar in construction and function, they have different handling capacities and require different electric motor maintenance. The guide below explains their key distinguishing features. 

How Are They Built Differently?

Brushed motors have an armature, which acts as a two-pole electromagnet. A commutator reverses the magnet’s polarity twice per cycle, facilitating current flow through the armature. The magnet’s poles pull and push the magnets on the outside of the motor.

With a brushless motor, a permanent magnet is used as an external rotor. It does not have any commutators. This option also uses three phases of driving coils and a sensor to track the rotor position. The sensor sends signals to the controller, which activates the coils. 

Pros & Cons

generatorWith their simple construction, brushless motors tend to be more efficient than brushed. They can operate effectively at all speeds and have a higher speed range with less noise. Because of their lack of brushes, they also tend to require less electric motor maintenance.

Brushed motors can be easier to actuate with a DC voltage supply or battery, while brushless must be electronically commutated with a controller. Brushed motors tend to cost less to construct and can be rebuilt to extend their life span. The controller is typically inexpensive and is not needed for fixed speed operations. 

Applications 

Brushed motors are more widely-used than brushless. However, both are very versatile. Brushed motors are typically used in household appliances, including generators, cars, and some industrial applications.

Brushless motors work better than brushed in high-demand environments, including manufacturing and electric vehicles. These are also used in computing and some power tools. 

 

If you’re an Anchorage, AK, business in need of electric motor maintenance or repair, turn to United Electric Motors. For more than 20 years, this locally-owned company has served the community, fixing broken generators and motors. Call (907) 563-5232 to speak with a friendly team member about your needs or request emergency service. Visit the website to view their inventory.

tracking