US 12,191,728 B2
Hairpin wire motor stator
Yu-Wei Chuang, Taoyuan (TW); Yao-Hsien Shao, Taoyuan (TW); and Ji Dai, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Nov. 17, 2021, as Appl. No. 17/455,412.
Claims priority of application No. 202110442901.6 (CN), filed on Apr. 23, 2021.
Prior Publication US 2022/0344994 A1, Oct. 27, 2022
Int. Cl. H02K 3/28 (2006.01)
CPC H02K 3/28 (2013.01) 15 Claims
OG exemplary drawing
 
1. A hairpin wire motor stator comprising:
a ring-shaped stator core defining a rotor accommodation space at a center of the stator core, wherein the stator core comprises an insertion side and an extension side allowing a plurality of hairpin wires to be inserted from the insertion side and protruded out from the extension side;
a plurality of slot-positions disposed on the stator core and surrounding the rotor accommodation space circumferentially, the slot-positions forming a plurality of radially-adjacent slot-position layers, the stator core comprising a plurality of polar regions, each polar region comprising a plurality of phases, each phase comprising a plurality of phase slots, the phase slots being disposed circumferentially adjacent and comprising at least a leftmost phase slot and a rightmost phase slot, each phase slot comprising the slot-positions that are radially-adjacent;
the hairpin wires configured to be disposed into the slot-positions of the phase slots of the same phases of the polar regions, the hairpin wires being connected to form a plurality of windings,
wherein the hairpin wires comprise a plurality of transpolar hairpin wires that are routed through immediately-adjacent two of the slot-position layers, all the transpolar hairpin wires that are routed the same through immediately-radially-adjacent two of the slot-position layers have a same span at the insertion side, a quotient is obtained by dividing a total number of the phase slots by a total number of the polar regions, and the span equals to the quotient plus or minus 1; and
at least a trans-layer connection wire connected between two of the windings that are routed through different immediately-radially-adjacent two of the slot-position layers, each winding comprises all the transpolar hairpin wires that are routed through the same immediately-radially-adjacent two of the slot-position layers, and each winding has two ends disposed into the leftmost phase slot and the rightmost phase slot of the phase slots of the same phases across the polar regions, wherein the trans-layer connection wire has two ends disposed into the leftmost phase slot and the rightmost phase slot of the phase slots of the same phases across the polar regions.