US 12,266,986 B2
Brushless motor and electrically-powered tool
Akito Nakamura, Osaka (JP); and Kota Kitamura, Mie (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/913,401
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 5, 2021, PCT No. PCT/JP2021/004394
§ 371(c)(1), (2) Date Sep. 21, 2022,
PCT Pub. No. WO2021/192654, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-056651 (JP), filed on Mar. 26, 2020.
Prior Publication US 2023/0170768 A1, Jun. 1, 2023
Int. Cl. H02K 11/33 (2016.01); H02K 3/52 (2006.01); H02K 7/14 (2006.01)
CPC H02K 11/33 (2016.01) [H02K 3/522 (2013.01); H02K 7/145 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A brushless motor of an inner rotor type, comprising:
a plurality of phase coils of multiple phases arranged around a rotation axis; and
a plurality of terminals configured to connect the plurality of phase coils of multiple phases to a switching circuit,
the plurality of terminals being located inside an inscribed circle of the plurality of phase coils of multiple phases,
the plurality of terminals including respective wire connecting parts, each of which clamps together two coil terminals of two phase coils of the plurality of phase coils to connect the two coil terminals with each other,
the wire connecting parts of the plurality of terminals being located inside the inscribed circle of the plurality of phase coils of multiple phases,
the plurality of terminals being disposed so as to pass through one or more holes provided in a drive board on which a switching element of the switching circuit is mounted.