# US 2026/0100611 A1 · Motor

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- Number: US 2026/0100611 A1
- Document ID: US20260100611A1
- Status: Published application
- Kind: A1
- Application number: 19/110,981
- Filed: 2023-07-18
- Published: 2026-04-09
- Earliest claimed: 2022-09-14
- Assignees: MINEBEA MITSUMI Inc.
- Applicants: MINEBEA MITSUMI Inc.
- Inventors: Yasuhiro MINEMATSU
- Web page: https://patentgrep.com/patent/US20260100611A1

## CPC

- H02K 1/12: Stationary parts of the magnetic circuit
- H02K 3/522: {for generally annular cores with salient poles}
- H02K 5/00: Casings; Enclosures; Supports
- H02K 2203/03: Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

The application provides an appropriately molded motor. A motor includes a stator a substrate supported by the stator and a resin member covering the stator the substrate includes, in an axial direction, a first surface opposing the stator and a second surface at an opposite side from the first surface the first surface of the substrate is in contact with the resin member the second surface of the substrate includes an inner peripheral part an outer peripheral part and an intermediate part located between the inner peripheral part and the outer peripheral part the intermediate part is provided with at least one pad having conductivity and is formed with a recessed part surrounding the pad, and an end part of the recessed part in a radial direction is formed at an outer side in the radial direction of the inner peripheral part and at an inner side in the radial direction of the outer peripheral part

## Claims

### Claim 1

A motor comprising:
a stator;
a substrate supported by the stator; and
a resin member covering the stator,
the substrate including, in an axial direction, a first surface opposing the stator and a second surface at an opposite side from the first surface, wherein
the first surface of the substrate is in contact with the resin member,
the second surface of the substrate includes an inner peripheral part, an outer peripheral part, and an intermediate part located between the inner peripheral part and the outer peripheral part,
the intermediate part is provided with at least one pad having conductivity and formed with a recessed part surrounding the pad, and
an end part of the recessed part in a radial direction is formed at an outer side in the radial direction of the inner peripheral part and at an inner side in the radial direction of the outer peripheral part.

### Claim 2 (depends on 1)

The motor according to claim 1, wherein
the recessed part is formed in a polygonal shape or a closed curved shape, and
the pad is provided in the polygonal shape or the closed curved shape.

### Claim 3 (depends on 1)

The motor according to claim 1, wherein the recessed part is formed only at the intermediate part.

### Claim 4 (depends on 1)

The motor according to claim 1, comprising:
three pads including the pad; and
three recessed parts including the recessed part, wherein
each of the three pads corresponds to one of a U-phase, a V-phase, and a W-phase, and
each of the three recessed parts surrounds one of the three pads.

### Claim 5 (depends on 1)

The motor according to claim 1, wherein
the substrate is formed by alternately stacking a plurality of conductor layers and a plurality of insulator layers,
the outer peripheral part of the substrate is provided with a connection part electrically connected to the stator,
the pad is provided at a first layer of the conductor layers, the first layer being located at an end of the substrate in the axial direction, and
the pad and the connection part are electrically connected by other layers of the conductor layers excluding the first layer of the conductor layers.

### Claim 6 (depends on 5)

The motor according to claim 5, wherein the recessed part penetrates through the first layer of the conductor layers in the axial direction.

### Claim 7 (depends on 1)

The motor according to claim 1, wherein
on the substrate, an annular part is provided at each of the outer peripheral part and the inner peripheral part, and
an end part of the recessed part in the radial direction is provided at a side closer to the intermediate part than each annular part.