The phase of the star-connected machine is such that the voltage across any two lines is the phasor difference in the voltages of the corresponding phases. The third-order harmonic voltages of all the phases are equal in-phase and magnitude. Mainly the three-phase alternators are star-connected. Therefore, phase voltage may contain third, fifth, seventh, and higher-order harmonics. Since the positive and the negative halves of the flux density wave are identical, only odd harmonics can be present, and even harmonics are absent. In addition, to the fundamental flux, the induced voltage in a winding will contain harmonics because of the non-sinusoidal space flux density distribution.

Therefore, the n th order harmonic induced EMF per phase is given by the equation shown below: Where K cn and K dn are the coil span factor and distribution factor for the n th harmonic. The winding factor corresponding to the n th harmonic voltage is given as: After updating the table, the drop-down list below lets you select whether to display the number of slots per pole per phase, the maximum possible fundamental winding factor, the number of winding symmetries, or the least common multiple between the number of poles and the number of slots in the table.B mn is the peak value of the n th harmonic flux density Winding Factor for n th Harmonic To get started, choose the approximate range of number of poles and number of slots that you are interested in. Determine number of slots and number of poles In no event shall Emetor be liable to any party for any damages arising out of the use of information from this winding calculator. You can compare the maximum fundamental winding factor for different combinations of number of poles and number of slots, display the winding layout for different coil spans, or evaluate the harmonic spectrum of the winding factor.Įmetor specifically disclaims any warranties, including, but not limited to, the implied warranties of merchantability, accuracy, or fitness for any particular purpose. You can investigate three-phase integer-slot, fractional-slot and concentrated windings, both with single and double winding layers where appropriate. The winding calculator allows you to find the optimum winding layout for your electric motor in a fast and convenient way. Please enable JavaScript in your browser preferences, then try again. Warning! Emetor works best with JavaScript enabled.

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