The cross-field theory of the capacitor motor

Analyses of the capacitor motor operation date back to the 1920´s, a pioneer effort being that of Brüderlin¹ in Europe. Work by Bloch,² Biermanns,³ and others antedates that of Morrill⁴ in this country whose analysis has been widely used. All of these have been based on the double revolving field theory, being extensions of that theory to the usual single-phase induction motor.