How can calculate the motor poles?

To calculate the number of motor poles, you can use the formula: ( P = \frac{120 \times f}{N} ), where ( P ) is the number of poles, ( f ) is the frequency in hertz, and ( N ) is the motor speed in revolutions per minute (RPM). Rearranging the formula allows you to find the number of poles if you have the frequency and RPM. For example, if a motor runs at 1800 RPM on a 60 Hz supply, the calculation would be ( P = \frac{120 \times 60}{1800} = 4 ) poles.