The following starting method for an induction motor is inferior view of the poor starting torque per ampere of the line current drawn:

A 4-pole lap-wound DC generator has a developed power of P watts and voltage of E volts. Two adjacent brushes of the machine are removed as they are worn out. If the machine operates with the remaining brushes, the developed voltage and power that can be obtained from the machine are

A 400V/100V, 10 kVA two-winding transformer is reconnected as an autotransformer across a suitable voltage source. The maximum rating of such an arrangement could be

Starting torque can be obtained in the case of a single phase induction motor with identical main and auxiliary windings by connecting