# US 12,009,709 B2 · Rotating electrical machine, stator core and rotor core set, method for manufacturing rotating electrical machine, method for manufacturing non-oriented electrical steel sheet, method for manufacturing rotor and stator of rotating electrical machine, and non-oriented electrical steel sheet set

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- Number: US 12,009,709 B2
- Document ID: US12009709B2
- Status: Granted
- Kind: B2
- Application number: 18/038,949
- Filed: 2022-03-30
- Published: 2023-11-02
- Granted: 2024-06-11
- Earliest claimed: 2021-03-31
- Assignees: Nippon Steel Corporation
- Applicants: Nippon Steel Corporation
- Inventors: Tesshu Murakawa; Yoshiaki Natori
- Web page: https://patentgrep.com/patent/US12009709B2

## CPC

- H02K 15/02: of stator or rotor bodies
- C21D 1/30: Stress-relieving
- C21D 6/008: {containing Si}
- C21D 8/1233: {Cold rolling}
- C21D 8/1261: {following hot rolling}
- C21D 9/0068: {for particular articles not mentioned below}
- C21D 9/46: for sheet metals
- C22C 38/001: {containing N}
- C22C 38/002: {containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60}
- C22C 38/004: {Very low carbon steels, i.e. having a carbon content of less than 0,01%}
- C22C 38/005: {containing rare earths, i.e. Sc, Y, Lanthanides}
- C22C 38/008: {containing tin}
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/06: containing aluminium
- C22C 38/08: containing nickel {(C22C38/105 takes precedence)}
- C22C 38/14: containing titanium or zirconium
- C22C 38/16: containing copper
- C22C 38/34: with more than 1.5% by weight of silicon
- C22C 38/38: with more than 1.5% by weight of manganese
- C22C 38/60: containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
- H01F 1/147: Alloys characterised by their composition {(treatment thereof for enhancing their electromagnetic properties C21D8/12)}
- H01F 41/02: for manufacturing cores, coils, or magnets (H01F41/14 takes precedence; for dynamo-electric machines H02K15/00)
- H02K 1/02: characterised by the magnetic material
- H02K 1/185: {to outer stators}
- H02K 15/028: Fastening stator or rotor bodies to casings, supports, shafts or hubs
- C21D 2201/05: Grain orientation
- H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which a {111}<211> orientation intensity (A) of a core material of the stator is in a range of 2 to 30, a {111}<211> orientation intensity (B) of a core material of the rotor is in a range of 1 to 15, and both the orientation intensities satisfy a relationship of an expression (1) A>B.

## Claims

### Claim 1

A rotating electrical machine comprising:
a stator;
a rotor; and
a casing that accommodates the stator and the rotor,
wherein a {111}<211> orientation intensity (A) of a core material of the stator is in a range of 2 to 30, a {111}<211> orientation intensity (B) of a core material of the rotor is in a range of 1 to 15, and both the orientation intensities satisfy a relationship of an expression (1) A>B.

### Claim 2 (depends on 1)

The rotating electrical machine according to claim 1, wherein a {411}<148> orientation intensity (C) of the core material of the rotor is less than 4.

### Claim 3 (depends on 1)

The rotating electrical machine according to claim 1, wherein a chemical composition of each of a core of the stator and a core of the rotor includes, by mass %, C: 0.0100% or less, Si: 2.6% or more and 4.5% or less, Mn: 0.10% or more and 3.00% or less, P: 0.15% or less, S: 0.0030% or less, N: 0.0040% or less, Al: 0.10% or more and 2.00% or less, one or more selected from Sn and Sb: 0% to 0.200%, Cr: 0% to 5.0%, Ni: 0% to 5.0%, Cu: 0% to 5.0%, Ca: 0% to 0.010%, Mg: 0% to 0.0100%, a rare earth element (REM): 0% to 0.010%, Ti: 0.0030% or less, B: 0.0000% to 0.0050%, O: 0.0000% to 0.0200%, and a remainder of Fe and impurities.