I know a brushed motor is mechanical and brushless is electric. Brushless is more efficient and creates less heat. But how does each work and why is there an advantage of one over the other?
In: 6
In short, physical contact between the rotor and the stator.
In a typical brushless motor, multpliphase power (usually 3 phase AC) is sent to stationary coils in the central stationary portion of the motor (called the stator). This produces an electromagnetic force that pulls the rotor around the outside via a bank of permanent magnets mounted to the rotor. In such a setup, the bearings physically mounting the rotor and stator together are the only point of contact between the two major components.
In a typical brushed motor, the magnets are on the stator and power is sent through coils on the rotor to create the force to turn the rotor. The contacts that transfer the current to the rotor are what we call the brushes. Insulated gaps that the brushes pass over create the different phases in the current to allow the motor to turn.
Latest Answers