THE AIR-GAP FIELD OF POLYPHASE AC MACHINE S WITH MAGNETIC SLOT WEDGES

For the purpose of calculating higher harmonic fields produced by an m -phase winding the vector potential is computed analytically using Fou rier series for the air gap, the magnetic wedge and the slot. With reg ard to machines having a large gap the air gap field is described in c ylindrical polar coordinates. Expressing the boundary conditions betwe en the three areas and making use of Fourier analysis several sets of linear equations will be obtained, the number of which is equal to slo ts per pole and phase. The solutions yield the amplitudes of the vecto r potential.