The type of motor that MOST frequently does NOT use brushes is the:

The induction motor is the type of motor that most frequently does not use brushes. This characteristic is essential because induction motors operate on the principle of electromagnetic induction, where electrical energy is converted to mechanical energy without the need for direct mechanical contact between moving parts. In this setup, alternating current generates a rotating magnetic field that induces current in the rotor, enabling it to turn.

Because the rotor is not directly connected to the power supply and does not require brushes to transfer current, this design leads to reduced maintenance and increased reliability, making induction motors a popular choice in various applications. In contrast, other types of motors, such as universal and series wound DC motors, require brushes for the commutation process, where the direction of current flow in the rotor windings is reversed to maintain rotation. The synchronous motor, while it also does not always use brushes, is more specialized and depends on the system setup. Hence, the induction motor stands out as the most common type that operates without brushes.