Rotary electric machine and pump
An aspect of a rotary electric machine of the disclosure includes: a rotor, able to rotate about a central axis as a center; a stator, opposite to the rotor, with a gap being interposed between the rotor and the stator; a substrate, electrically connected with the stator; a first housing, formed of metal, being open on a side in an axial direction, and accommodating the stator; a second housing, fixed, on the side in the axial direction, to the first housing, accommodating the substrate, and having an insulating property; and a conductor, electrically connected with the substrate and the first housing. The substrate has a grounding pattern. The conductor has: a first connector, electrically connected with the first housing inside the first housing; and a second connector, electrically connected with the grounding pattern.
1 . A rotary electric machine, comprising:
a rotor, able to rotate about a central axis as a center;
a stator, opposite to the rotor, with a gap being interposed between the rotor and the stator;
a substrate, electrically connected with the stator;
a first housing, formed of metal, being open on a side in an axial direction, and accommodating the stator;
a second housing, fixed, on the side in the axial direction, to the first housing, accommodating the substrate, and having an insulating property; and
a conductor, electrically connected with the substrate and the first housing,
wherein
the substrate has a grounding pattern, and
the conductor has:
a first connector, electrically connected with the first housing inside the first housing; and
a second connector, electrically connected with the grounding pattern.
2 . The rotary electric machine as claimed in claim 1 ,
wherein the first housing has:
a first housing body, accommodating the stator; and
an installer, protruding from the first housing body toward a radially outer side.
3 . The rotary electric machine as claimed in claim 1 ,
wherein the second housing has a bottom located between the substrate and the stator in the axial direction,
the bottom supports a coil lead wire drawn out from a coil of the stator or a terminal member electrically connected with the coil lead wire, and
the conductor penetrates through the bottom in the axial direction.
4 . The rotary electric machine as claimed in claim 3 ,
wherein the bottom has:
a first through hole, which penetrates through the bottom in the axial direction, and through which the conductor passes; and
an elastic holder, having at least a portion located inside the first through hole, and being elastically deformable,
wherein the conductor contacts the elastic holder and an inner surface of the first through hole.
5 . The rotary electric machine as claimed in claim 1 ,
wherein the conductor has:
a first member, having the first connector;
a second member, having the second connector and contacting the first member in the axial direction.
6 . The rotary electric machine as claimed in claim 5 ,
wherein at least one of the first member and the second member has an elastic part elastically deformable in the axial direction, and
the first member and the second member contact each other via the elastic part.
7 . The rotary electric machine as claimed in claim 6 ,
wherein the second housing has:
a support, supporting the substrate from an other side in the axial direction;
a cover, covering the substrate from the side in the axial direction,
wherein the second member penetrates through the support in the axial direction, and is held by the support.
8 . The rotary electric machine as claimed in claim 6 , comprising:
an insulator, located, on the side of the axial direction, at a stator core in the stator,
wherein the insulator is located inside the first housing,
a gap is provided between the insulator and the first housing in a radial direction,
the first member is supported by the insulator from an other side in the axial direction and contacts a radially outer surface of the insulator, and
the first connector is elastically deformable in the radial direction, located between the radially outer surface of the insulator and a radially inner surface of the first housing in the radial direction, and contacts the radially inner surface of the first housing.
9 . The rotary electric machine as claimed in claim 8 ,
wherein the first member has:
a supported part, contacting the insulator in the axial direction and the radial direction;
the elastic part, protruding from a radially inner end of the supported part toward the side in the axial direction; and
a protrusion, protruding from a radially outer end of the supported part toward the side in the axial direction.
10 . The rotary electric machine as claimed in claim 9 ,
wherein a groove open on a radially outer side and extending in the radial direction is provided on a surface of the insulator on the side in the axial direction, and
at least a portion of the supported part is fit into the groove.
11 . The rotary electric machine as claimed in claim 1 ,
wherein the conductor is a single component.
12 . The rotary electric machine as claimed in claim 1 ,
wherein the conductor has:
a fixer, having the first connector and being fixed to the first housing; and
a cable, connecting the fixer and the second connector.
13 . The rotary electric machine as claimed in claim 1 ,
wherein the first housing has a hole open in an inside of the first housing, and
the first connector is pressed into the hole.
14 . The rotary electric machine as claimed in claim 13 ,
wherein the hole is open on the side in the axial direction, and
the second housing has a contactor contacting a portion of the conductor from the side in the axial direction.
15 . The rotary electric machine as claimed in claim 1 ,
wherein the first connector is fixed to an inner surface of the first housing by a bolt.
16 . The rotary electric machine as claimed in claim 15 ,
wherein the first housing has a female threaded hole which is open in an inside of the first housing and into which the bolt is tightened,
the conductor has a second through hole penetrating through the conductor, and
when viewed in a direction in which the bolt is tightened into the female threaded hole, a portion of the second through hole is overlapped with the bolt.
17 . The rotary electric machine as claimed in claim 1 ,
wherein the conductor has a curved part curved in an orientation of being convex toward a direction intersecting with the axial direction.
18 . The rotary electric machine as claimed in claim 1 ,
wherein the second connector has a plurality of connection terminals penetrating through the substrate.
19 . The rotary electric machine as claimed in claim 18 ,
wherein the connection terminals comprise:
a pair of connection terminals with circumferential positions different from each other; and
a connection terminal with a radial position different from the pair of connection terminals.
20 . A pump, comprising:
the rotary electric machine as claimed in claim 1 ; and
a pump mechanism, connected with the rotary electric machine.