US 11,949,292 B2
Rotor and method for manufacturing rotor
Yuki Takahashi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Mar. 22, 2021, as Appl. No. 17/208,484.
Application 17/208,484 is a continuation of application No. PCT/JP2019/034626, filed on Sep. 3, 2019.
Claims priority of application No. 2018-204071 (JP), filed on Oct. 30, 2018.
Prior Publication US 2021/0211006 A1, Jul. 8, 2021
Int. Cl. H02K 1/27 (2022.01); H02K 1/276 (2022.01); H02K 1/278 (2022.01); H02K 1/28 (2006.01); H02K 1/30 (2006.01); H02K 15/03 (2006.01)
CPC H02K 1/278 (2013.01) [H02K 1/2773 (2013.01); H02K 1/30 (2013.01); H02K 15/03 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A rotor comprising:
a magnet including a pair of shoulders;
a rotor core defining a housing hole configured to house the magnet such that the pair of shoulders are arranged in a circumferential direction of the rotor, wherein
the rotor core includes:
an inner core located radially inward of the housing hole;
a pair of supporters located radially outward of the inner core and arranged in the circumferential direction with the housing hole defined between the pair of supporters, the pair of supporters being configured to support the magnet by holding the pair of shoulders of the magnet from radially outsides of the pair of shoulders; and
a covering portion configured to connect between the pair of supporters and cover the magnet from radially outside of the magnet,
a thickness dimension of the covering portion is smaller than a thickness dimension of each of the pair of supporters,
the covering portion is connected to at least the pair of supporters,
the magnet is one of a plurality of magnets,
a q-axis is defined by an axis passing through a midpoint of adjacent magnetic poles arranged in the circumferential direction and generated by the plurality of magnets,
the rotor core includes a q-axis recessed portion recessed radially inward from an outer surface of the rotor core relative to a radial direction of the rotor that is parallel to the q-axis,
one of the pair of supporters and the q-axis recessed portion are arranged radially adjacent relative to the radial direction,
the housing hole is one of a plurality of housing holes,
the pair of supporters is one of a plurality of pairs of supporters,
the rotor core includes a connecting portion located between adjacent ones of the plurality of housing holes arranged in the circumferential direction,
each of the connecting portions connects between one of the pair of supporters and one of another pair of supporters that is adjacent to the one of the pair of supporters in the circumferential direction without passing through the magnet, and
the q-axis recessed portion has a recessed dimension that is larger than a thickness dimension of the connecting portion in the radial direction.