Saturated High-Speed Homopolar Alternators at Balanced Loads

A former paper of the authors is extended to find the radial component of the magnetic induction in the airgap of homopolar alternators when supplying balanced loads. The armature currents are represented by sinusoidal current sheets at the stator bore. The partial differential equations, the boundary conditions, and the method of solution are reviewed. Numerical results were obtained for a 95 KVA, 115/200 v., 3,400 cps developmental homopolar alternator. Equations for the calculations of the armature impedances are given. A phasor diagram for the finding of the terminal voltage of the alternator at balanced loads is explained. Calculated results compare well with tests.