Transfer function of 2-phase servomotors

THE extensive use of 2-phase induction motors in servo systems has justified giving some attention to their analysis under transient conditions. Stanley1 gives stator and rotor differential equations referred to axes fixed in the stator. Neal,2 Hraba,3 and Brown4 give an experimental investigation of the problem in addition to approximating the nonlinear equations to linear ones with approximate transfer functions in the last two references. Hopkin,5 Koopman,6 and Gilfillan and Kaplan7 give solutions to the problem under certain assumptions and under certain operating conditions.