Question - Brushless motor Winding
Hi,
The turns or windings in a motor determine the Kv or RPMs per volt. The less turns, the higher the RPMs/v (or Kv) and the less torque.
The rotor size also determines torque by increasing the electromagnet coupling (or field) to the magnets. Larger rotors allows for larger magnets and thicker guage wire...hence the higher current rating for the 22/20/2 motor.
What's the drawback? Cost, size, weight, and current requirements. Therefor, picking a motor that is optimal for your application is always a wise choice.
These two motors are similar in some respects but have distinct differences.
What application are you thinking of using these motors in?
Regards.