Armature winding for dynamo-electric machine

摘要

In a three phase armature winding for a dynamo-electric machine, each phase of the winding comprises a first phase belt for (3n+2) slots and a second phase belt for (3n+1) slots. Three parallel connected circuits each constituting series connected coils per circuit. Each series coil per circuit has an upper coil piece and a lower coil piece connected thereto in series. Each of the upper and lower coil pieces has one connection side end portion and other non-connection side end portion. The first phase belt houses (3n+2) series coils of the circuits and the second phase belt houses (3n+1) series coils thereof. When the circuits in each phase are designated circuit numbers, the circuits in each phase are arranged so that a circuit sequence of the upper coil pieces in each phase belt and a circuit sequence of the lower coil pieces therein are substantially the same. A pair of jumper wires are mounted at the non-connection side end portion side of the series coils in the first phase belt whereby part of the upper coil pieces in the first phase belt and part of the lower coil pieces therein are connected so that the circuit sequence of the part of the upper coil pieces is interchanged with that of the part of the lower coil pieces.