Define electromagnetic torque pulsations which occur during starting of synchronous motors; Recommends a standard equivalent circuit that can be used to analytically describe the behavior of the synchronous motor during starting; provide the definitions and information necessary to properly determine the circuit parameters in the equivalent circuit; supply equations derived from the circuit which can be used to calculate the magnitude of the torque pulsation which would occur during starting; present a uniform technique for the on-line measurement of torque pulsations during starting based on equations derived from the equivalent circuit.