# US 12,224,637 B2 · Rotary electrical machine

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- Number: US 12,224,637 B2
- Document ID: US12224637B2
- Status: Granted
- Kind: B2
- Application number: 18/084,958
- Filed: 2022-12-20
- Published: 2023-04-20
- Granted: 2025-02-11
- Earliest claimed: 2020-07-14
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Kouji Hotsuta
- Web page: https://patentgrep.com/patent/US12224637B2

## CPC

- H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32)
- H02K 1/16: Stator cores with slots for windings
- H02K 3/18: Windings for salient poles
- H02K 3/345: {between conductor and core, e.g. slot insulation}
- H02K 3/522: {for generally annular cores with salient poles}
- H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)}
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A rotary electrical machine includes a stator core having a plurality of teeth, a plurality of windings having coils wound around the teeth, a plurality of coil terminals connected to the windings, a plurality of external connection terminals connected to the coil terminals and connectable to an external power supply terminal, and a plurality of terminal holding portions attached to the stator core and holding the coil terminals. The external connection terminal has a contacted portion that extends in a direction perpendicular to the axial direction and abuts against the contact portion of the coil terminal in the axial direction. A terminal holding portion holds the coil terminal so as to be relatively movable in the directions of approaching and separating from the contacted portion.

## Claims

### Claim 1

A rotary electrical machine, comprising:
a stator core having a plurality of teeth;
a plurality of windings having coils wound around the teeth;
a plurality of coil terminals connected to the winding;
a plurality of external connection terminals connected to the coil terminal and connectable to an external power supply terminal; and
a plurality of terminal holding portions attached to the stator core and configured to hold the coil terminals;
wherein
when a direction parallel to a rotation axis of the rotary electrical machine is defined as an axial direction,
the external connection terminal has a contacted portion that extends in a direction perpendicular to the axial direction and abuts against a contact portion of the coil terminal in the axial direction, and
the terminal holding portion holds the coil terminal so as to be relatively movable in a direction of approaching and separating from the contacted portion.

### Claim 2 (depends on 1)

The rotary electrical machine according to claim 1, wherein
when a direction perpendicular to the rotation axis is defined as a radial direction, and
a contact portion between the contact portion and the contacted portion is arranged radially inward of the stator core.

### Claim 3 (depends on 1)

The rotary electrical machine according to claim 1, further comprising:
an insulator interposed between the stator core and the winding, wherein
the terminal holding portion is provided integrally with the insulator, and
the coil terminal is fitted in a fitting hole of the terminal holding portion with an intermediate fit or a clearance fit.

### Claim 4 (depends on 1)

The rotary electrical machine according to claim 1, wherein
a surface on which one of the contact portion and the contacted portion contacts the other is a convex curved surface.

### Claim 5 (depends on 1)

The rotary electrical machine according to claim 1, wherein
the coil terminal has a winding connection portion connected to the winding, and
a slack portion of the winding from the coil to the winding connection portion has slack, as long as the winding is held by the terminal holding portion within a movable range, which is from a position where the coil terminal is farthest away from the contacted portion to a position where it contacts the contacted portion.

### Claim 6 (depends on 2)

The rotary electrical machine according to claim 2, wherein
a surface on which one of the contact portion and the contacted portion contacts the other is a convex curved surface.