Wiring method for increasing number of parallel-connection branches of three-phase alternating current motor double-layer stator winding

The invention relates to a wiring method for increasing the number of parallel-connection branches of three-phase alternating current motor double-layer stator winding. Minimum wiring units of the three-phase alternating current motor double-layer stator winding are single-side windings, namely, two types of wiring units including upper single-side windings and lower single-side windings, wherein a branch is composed of each upper single-side winding and each lower single-side winding through a wiring unit selecting method provided by the wiring method for increasing the number of the parallel-connection branches of the three-phase alternating current motor double-layer stator winding, the number of the parallel-connection branches of the three-phase alternating current motor double-layer stator winding is doubled on the basis of the original number of the parallel-connection branches under the premise that branches of each phase are symmetrical, and the formed three-phase alternating current motor double-lay