What is the formula for stator turns per phase?

The formula for calculating the stator turns per phase in an electric machine, such as an alternator or a motor, is not a single, universally applicable equation. This is because the calculation can depend on various factors related to the machine’s design, including the type of winding employed, the voltage required, the number of poles, and the flux per pole. However, a general approach to estimating the stator turns per phase, based on the machine’s electrical specifications, is given by the formula:

[ text{Turns per phase} = frac{(E_{ph} times 10^8)}{(4.44 times f times Phi)} ]

where:

– (E_{ph}) is the RMS voltage per phase in volts,

– (f) is the frequency in Hertz,

– (Phi) is the flux per pole in Webers.

This formula is a simplified version and is primarily applicable to synchronous machines (alternators) and assumes a sinusoidal flux distribution. The actual calculation can be more complex and may require adjustments based on the specific winding arrangements (such as delta or star connections), coil pitch, and the efficiency and power factor of the machine.

For an accurate calculation tailored to a particular design or for more complex machine types (like induction motors with squirrel-cage rotors), detailed design parameters and specific machine characteristics are needed. Moreover, the design process would typically involve additional considerations such as the core material properties, dimensions, winding