Brushed DC Motors

Advantages: Low cost, simple control, low noise.Disadvantages: Relatively short service life; brushes require regular replacement. Performance is greatly affected by variations in load and supply voltage, resulting in poor transmission stability. Slow startup speed; incapable of rapid, successive start-stop operations. Unstable low-speed operation accompanied by creep.

Brushless DC Motors (BLDC)

Advantages: Brushless construction delivers substantially longer service life than brushed motors; low noise and constant torque output.Disadvantages: Dedicated control circuitry is required for driving. Operation is sensitive to fluctuations in load and supply voltage. Closed-loop control can be implemented, yet overall stability remains limited. Unstable low-speed performance with creep phenomenon.

AC Motors

Advantages: Low cost, low noise, long service life.Disadvantages: Low starting torque; difficult speed regulation. Operation is heavily influenced by load and supply voltage variations. Unstable low-speed running and creep occur.

Stepper Motors

Advantages: Speed is regulated by pulse signals, maintaining outstanding stability at both low and high speeds, unaffected by voltage and load fluctuations. Long service life and high positioning accuracy.Disadvantages: Higher noise level compared with other motor types. Resonance occurs at specific speeds depending on motor characteristics. A dedicated drive circuit is necessary. Low energy efficiency; under equal power rating, it produces lower torque at high speeds than other motors.