Patent ID: 9673674
Date: 2017-06-06
CPC Classifications: H02K

Claim:
1. A stator comprising a stator core and phase windings of a plurality of phases, wherein the stator core comprises a plurality of slots formed in the stator core and arranged along a circumferential direction of the stator core, each of the phases comprises a pair of phase windings, each of the pair of the phase windings comprises conductors electrically connected together, and the conductors are accommodated in the slots so that the conductors are accommodated from one side to the other side in each of the slots in a view from a radial direction of the stator core, and the conductors forming the pair of the phase windings are arranged with not less than two of the conductors forming a particular one of the pair of the phase windings being physically parallel to each other in each of the slots, the pair of the phase windings in each of the phases are arranged alternately in a 2n-th layer, where n is a positive integer, and a (2n−1)-th layer in the slots along the circumferential direction of the stator core, and the number of the conductors in the 2n-th layer and the (2n−1)-th layer is the same, and at least two terminals of the pair of the phase windings in each of the phases are electrically connected, the phase windings of the three phases are arranged in a star-delta composite connection, and the conductors forming the pair of the phase windings in each of the phases are accommodated in a first slot and a second slot which are adjacently arranged so that the conductor accommodated in the n-th layer is electrically connected to the conductor accommodated in the (n+1)-th layer, ascending order, per slot, and the stator further comprises a rearranging section configured to independently electrically connect each of the pair of the phase windings in each phase to form one of a star (Y) connection, a delta (Δ) connection, and to rearrange the pair of the phase windings in each phase to form a star-delta (Y-Δ) connection.