US 12,170,462 B2
Rotating electrical machine with magnet unit and axially stacked restriction member
Yuki Takahashi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Aug. 9, 2021, as Appl. No. 17/397,263.
Application 17/397,263 is a continuation of application No. PCT/JP2020/002780, filed on Jan. 27, 2020.
Claims priority of application No. 2019-022100 (JP), filed on Feb. 8, 2019.
Prior Publication US 2021/0367465 A1, Nov. 25, 2021
Int. Cl. H02K 1/279 (2022.01); H02K 1/278 (2022.01); H02K 1/28 (2006.01); H02K 7/00 (2006.01); H02K 11/33 (2016.01); H02K 21/22 (2006.01); H02P 27/08 (2006.01); B60K 7/00 (2006.01); B60L 53/20 (2019.01)
CPC H02K 1/279 (2022.01) [H02K 1/278 (2013.01); H02K 1/28 (2013.01); H02K 7/006 (2013.01); H02K 11/33 (2016.01); H02K 21/22 (2013.01); H02P 27/08 (2013.01); B60K 7/0007 (2013.01); B60L 53/20 (2019.02); H02K 2213/03 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A rotating electrical machine comprising:
a magnetic field-producing unit which includes:
a magnet unit, the magnet unit being equipped with a plurality of magnetic poles arranged to have magnetic polarities located alternately in a circumferential direction of the magnetic field-producing unit, the magnet unit having opposing peripheral surfaces, one of the peripheral surfaces being an armature-side peripheral surface that is located to be radially closer to the stator an armature than the other of the peripheral surfaces; and
a magnet carrier having opposing peripheral surfaces, one of the peripheral surfaces being an armature-side peripheral surface that is located to be radially closer to the armature than the other of the peripheral surfaces, the magnet unit being mounted to the armature-side peripheral surface of the magnet carrier;
the armature which is equipped with a multi-phase winding;
a rotor which is implemented by one of the magnetic field-producing unit and the armature; and
a cylindrical restriction member mounted on the armature-side peripheral surface of the magnet unit and configured to restrict radial movement of the magnet unit relative to the magnet carrier, wherein:
the restriction member has a stacked configuration stacked in an axial direction of the rotor;
the armature has a core with a slot-less structure;
the armature winding is mounted to the core and includes conductive members that face the magnetic-field producing unit and are arranged at a given interval away from each other in the circumferential direction;
the armature has one of a first configuration and a second configuration included in the core,
the first configuration having inter-conductor members, each of the inter-conductor members being disposed between a respective adjacent two of the conductive members in the circumferential direction,
the second configuration having no inter-conductor member between a respective adjacent two of the conductive members in the circumferential direction;
each of the inter-conductor members is made of one of a magnetic material and a non-magnetic material; and
the magnetic material satisfies the following relation:
Wt×Bs≤Wm×Br
where:
Wt represents a total width of the inter-conductor members lying within a range of one of the magnetic poles of the magnet unit in the circumferential direction;
Bs represents a saturation magnetic flux density of the inter-conductor members;
Wm represents a dimension of a portion of the magnet unit equivalent to one of the magnetic poles of the magnet unit in the circumferential direction; and
Br represents a remanent flux density of the magnet unit.