US 12,294,270 B2
Stator and motor having coil units annularly arranged
Hisato Amano, Nagaokakyo (JP); Mitsutoshi Natsumeda, Nagaokakyo (JP); Eiji Sakaguchi, Nagaokakyo (JP); Takashi Sakurada, Nagaokakyo (JP); Takahiro Sato, Nagaokakyo (JP); and Masashi Uno, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Nov. 25, 2022, as Appl. No. 17/994,037.
Application 17/994,037 is a continuation of application No. PCT/JP2020/046518, filed on Dec. 14, 2020.
Claims priority of application No. 2020-091535 (JP), filed on May 26, 2020.
Prior Publication US 2023/0085682 A1, Mar. 23, 2023
Int. Cl. H02K 3/52 (2006.01); H02K 21/16 (2006.01)
CPC H02K 3/522 (2013.01) [H02K 21/16 (2013.01); H02K 2203/09 (2013.01); H02K 2203/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stator comprising:
a coil unit assembly that includes coil units annularly arranged; and
a busbar provided on an outer peripheral surface of the coil unit assembly,
wherein when a direction in which an axis of the stator extends is defined as an axial direction, a direction which is orthogonal to the axial direction and in which outer peripheral surface and inner peripheral surface of the stator face each other is a radial direction, and a direction along an outer periphery of the stator when viewed from the axial direction is a circumferential direction,
wherein the coil units each include a split core that includes a tooth that extends in the radial direction, an insulator mounted to overlap at least the tooth of the split core, and a coil that includes a winding wound around the tooth of the split core with the insulator interposed therebetween, and
wherein the coil units include a first coil unit, a second coil unit, and a third coil unit annularly and repeatedly arranged in sequence along the circumferential direction.