US 12,218,556 B2
Rotating electric machine
Yuki Takahashi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Feb. 28, 2022, as Appl. No. 17/682,585.
Application 17/682,585 is a continuation of application No. PCT/JP2020/033509, filed on Sep. 3, 2020.
Claims priority of application No. 2019-164680 (JP), filed on Sep. 10, 2019.
Prior Publication US 2022/0181959 A1, Jun. 9, 2022
Int. Cl. H02K 1/27 (2022.01); H02K 1/16 (2006.01); H02K 1/2706 (2022.01); H02K 3/18 (2006.01); H02K 21/22 (2006.01)
CPC H02K 21/227 (2013.01) [H02K 1/16 (2013.01); H02K 1/2706 (2013.01); H02K 3/18 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A rotating electric machine comprising:
a field system including a magnet section having a plurality of magnetic poles whose polarities alternate in a circumferential direction; and
an armature arranged to face the field system and including a multi-phase armature coil,
wherein
either of the field system and the armature is configured as a rotor,
the field system also includes a soft-magnetic core having at least one magnet-receiving hole in which the magnet section is received and held,
the armature coil has electrical conductor sections arranged at positions facing the field system and at predetermined intervals in the circumferential direction,
in the armature, inter-conductor members are provided between the electrical conductor sections in the circumferential direction, and
the inter-conductor members in each part of the armature corresponding to one magnetic pole are magnetically saturated by magnetic flux from one magnetic pole of the magnet section when the electrical conductor sections are not energized,
wherein
the inter-conductor members and the magnet section are configured to satisfy the following relationship: Wt×Bs<Wm×Br, where Wt is a total circumferential width of the inter-conductor members in each part of the armature corresponding to one magnetic pole, Bs is a saturation flux density of the inter-conductor members, Wm is a circumferential width of the magnet section per magnetic pole and Br is a residual flux density of the magnet section, and
wherein
each magnetic pole of the magnet section has a plurality of magnetic flux acting surfaces each of which is a peripheral surface of the magnet section on the armature side in a radial direction and constitutes a magnetic flux inflow surface or a magnetic flux outflow surface, and
the circumferential width Wm of the magnet section per magnetic pole is represented by the sum of circumferential widths of the magnetic flux acting surfaces.