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1:25 Magnetic field of a stator coil (pole number 1) 2:10 Pole pair and number of pole pairs 3:44 Apparently rotating magnetic field 5:00 Speed and number of pole pairs 6:45 Quiz Asynchronous motors have a number of poles and a number of pole pairs. What does that mean? How do you calculate them? This refers to the poles of the magnetic field that is created in the stator. From the perspective of the rotor, which is driven by the stator's magnetic field, only the magnetic poles that are inside the stator exist. Only they cause torque, and that is why only these magnetic poles are counted when talking about the number of poles. Accordingly, pole pairs do not refer to the magnetic fields of the stator coils. Only the north and south poles that are on the rotor are referred to as pole pairs. The number of pole pairs is important because it determines how high the speed and how high the torque of the motor is. Why this is the case is explained here simply and clearly with animations. There are also a few technical terms that you will be able to understand better after watching the video. You can also test yourself in a quiz that I end the video with. 3-euro donation via PayPal: https://www.paypal.com/donate?hosted_...