The primary difference between a and a Brushless DC (BLDC) Motor is the shape of their Back Electromotive Force (Back EMF) waveform .

: Produces a sinusoidal Back EMF, leading to smoother torque and quieter operation.

: Produces a trapezoidal Back EMF, which can result in more "torque ripple" or vibration during commutation. Key Feature Comparison What is the difference between BLDC and PMSM motors?