Determination stator winding MMF method of frequency controlled a.c. machines for their performance investigation
In article is developed a MMF calculation method for stator winding by arbitrary alternation of currents in phases with the period Tврм , incl. alternation according the not harmonious law; for instance, their amplitudes by some part of Tврм were invariable. This method for MMF calculation is useful also for stator winding construction by different breadth of phases zones. The example of MMF calculation is given. Mathematical solution is achieved by transformation of MMF as a harmonious series (Fourier series) with two variables: space and time harmonics.