Brushed Motors

Brushed motors were introduced in the 19th century with the invention of solid-state electronics technology. Brushed motors were the first equipment to produce mechanical energy with the help of electrical energy. A DC power was required to operate a brushed motor. The name brushed motors were given to such motors as these motors used a brush in its components for rotation. The structure of a brushed motor includes being armature, brushes, a commutator, a field magnet, and an axle. The structure for a brushed motor is shown in the figure below.

The brushes used in the brushed motors are used for the rotation of the commutator. The brushes used help to rotate the commutator in the opposite direction as compared to the permanent magnet polarity. To change the direction for the rotation of the motor, the polarity for the brushed is changed. Similarly, by reversing the polarity of the battery attached with the motor the direction for the rotation of the motor is also changed. 

Different properties linked with the brushed motor are determined and estimated with the help of different materials used in the structure of the motor. The speed of the DC brushed motor is changed by changing the voltage value which is provided as the input to the motor. The speed of the motor is also changed by changing the magnetic field of the motor. Different kinds of stators with permanent magnet are also used in the brushed DC motors for the rotation purpose of the motors. For the big level industrial brushed motors rotor magnets are used. 

The applications of brushed motors are numerous as they are used daily in different appliances and equipment. The brushed motors with permanent magnets are mostly used. These motors are used in the equipment demanding specific horsepower which includes different domestic and industrial appliances. Small dc brushed motors are also hugely used in toys and small robots.

Brushless Motors

As the name suggests, the brushless motors are the motors without brushes. The design of the brushless motors is more sophisticated as compared to the brushed motors. Permanents magnets are mounted in brushless motors. The number of mounted permanent magnet in brushless motors varies from the brushless motor to motor. A rotor is the main component in the brushless motors and the magnets are used only to drive the rotor. The structure and components of a brushless motor are shown in the figure below.

The brushless motors are also known as the electronically commutated motors and synchronous motors. The brushless motors are powered with the help of DC power but inside the brushless motors, an inverter is used which converts the dc power into ac which is used in the rotation of each phase of the motor. 

Brushless motors are used in every field of life due to their efficiency and reliable control. From the complex medical equipment to drones and complex robots, brushless motors are used.

Comparison

A comparisition between Brashed motors and Brushless motors by topic: