# US 10,873,227 B2 · Interior permanent magnet synchronous machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,227 B2 - Document ID: US10873227B2 - Status: Granted - Kind: B2 - Application number: 15/827,307 - Filed: 2017-11-30 - Published: 2019-05-30 - Granted: 2020-12-22 - Earliest claimed: 2017-11-30 - Assignees: Steering Solutions IP Holding Corporation - Applicants: Steering Solutions IP Holding Corporation - Inventors: Subhra Paul; Alejandro J. Pina Ortega - Web page: https://patentgrep.com/patent/US10873227B2 ## CPC - H02K 1/2798: where both axial sides of the stator face a rotor - H02K 1/16: Stator cores with slots for windings - H02K 1/2766: {having a flux concentration effect} - H02K 1/2773: {consisting of tangentially magnetized radial magnets} - H02K 15/03: having permanent magnets - H02K 21/024: {Radial air gap machines} - H02K 21/16: having annular armature cores with salient poles (with homopolar co-operation H02K21/20) - H02K 29/03: with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems - 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}) ## Abstract An interior permanent magnet synchronous machine includes a stator having electromagnetic windings and a rotor that is disposed concentric with the stator. The rotor has a plurality of rotor segments that include a first rotor segment and a second rotor segment. The first rotor segment is arranged to receive a first magnet set having first magnets that are disposed at a first pole-arc angle relative to each other. The second rotor segment is axially stacked relative to the first rotor segment along a rotor axis. The second rotor segment is arranged to receive a second magnet set having second magnets that are disposed at a second pole-arc angle relative to each other. The second pole-arc angle is different than the first pole-arc angle. ## Claims ### Claim 1 An interior permanent magnet synchronous machine, comprising: a stator having electromagnetic windings; and a rotor that is disposed concentric with the stator and is disposed about a rotor axis, the rotor having a plurality of rotor segments, comprising: a first rotor segment being arranged to receive a first magnet set having first magnets, arranged in a V-shape, that are disposed at a first pole-arc angle relative to each other, and a second rotor segment that is axially stacked relative to the first rotor segment along the rotor axis, the second rotor segment being arranged to receive a second magnet set having second magnets, arranged in a V-shape, that are disposed at a second pole-arc angle relative to each other, the second pole-arc angle being different than the first pole-arc angle, the second magnet set is not skewed relative to the first magnet set, each first magnet of the first magnet set being coaxial with each second magnet of the second magnet set, the each second magnet oriented at an oblique angle relative to the each first magnet. ### Claim 2 (depends on 1) The interior permanent magnet synchronous machine of claim 1, wherein the first rotor segment is disposed axially symmetric with respect to the second rotor segment such that the first magnet set at least partially covers the second magnet set. ### Claim 3 (depends on 1) The interior permanent magnet synchronous machine of claim 1, wherein the first rotor segment has a first rotor segment axial length. ### Claim 4 (depends on 3) The interior permanent magnet synchronous machine of claim 3, wherein the second rotor segment has a second rotor segment axial length. ### Claim 5 (depends on 4) The interior permanent magnet synchronous machine of claim 4, wherein the first rotor segment axial length is different from the second rotor segment axial length. ### Claim 6 (depends on 5) The interior permanent magnet synchronous machine of claim 5, wherein: the first magnets have a first magnet thickness that extends tangentially across the first magnets and the second magnets have a second magnet thickness that extends tangentially across the second magnets. ### Claim 7 (depends on 6) The interior permanent magnet synchronous machine of claim 6, wherein the first magnet thickness is different than the second magnet thickness. ### Claim 8 (depends on 5) The interior permanent magnet synchronous machine of claim 5, wherein the plurality of rotor segments has: a third rotor segment that is axially stacked relative to the first rotor segment and the second rotor segment along the rotor axis, the third rotor segment having a third rotor segment axial length that is different than the first rotor segment axial length and the second rotor segment axial length, the third rotor segment is arranged to receive a third magnet set having third magnets that are disposed at a third pole-arc angle relative to each other, the third pole-arc angle being different than the first pole-arc angle and the second pole-arc angle. ### Claim 9 (depends on 8) The interior permanent magnet synchronous machine of claim 8, wherein the rotor is disposed within the stator. ### Claim 10 (depends on 8) The interior permanent magnet synchronous machine of claim 8, wherein the rotor is disposed about the stator. ### Claim 11 A rotor for an interior permanent magnet synchronous machine, comprising: a plurality of rotor segments that are axially stacked along a rotor axis, the plurality of rotor segments, having: a first rotor segment being arranged to receive a first magnet set having first magnets that are disposed within a first magnet pocket, the first magnets, arranged in a V-shape, are disposed at a first pole-arc angle relative to each other and have a first magnet length that extends perpendicular to the rotor axis, and a second rotor segment that is axially stacked relative to the first rotor segment along the rotor axis, the second rotor segment being arranged to receive a second magnet set having second magnets that are disposed within a second magnet pocket, the second magnets, arranged in a V-shape, are disposed at a second pole-arc angle relative to each other and have a second magnet length that extends perpendicular to the rotor axis and is different than the first magnet length, the second pole-arc angle is different than the first pole-arc angle and the second magnet set is not skewed relative to the first magnet set, each first magnet of the first magnet set being coaxial with each second magnet of the second magnet set, the each second magnet oriented at an oblique angle relative to the each first magnet. ### Claim 12 (depends on 11) The rotor of claim 11, wherein the first magnets have a first magnet width that extends parallel to the rotor axis. ### Claim 13 (depends on 12) The rotor of claim 12, wherein the second magnets have a second magnet width that extends parallel to the rotor axis. ### Claim 14 (depends on 13) The rotor of claim 13, wherein the first magnet width is different than the second magnet width. ### Claim 15 (depends on 11) The rotor of claim 11, wherein the first magnets have a first magnet thickness that extends tangentially across the first magnet pocket. ### Claim 16 (depends on 15) The rotor of claim 15, wherein the second magnets have a second magnet thickness that extends tangentially across the second magnet pocket. ### Claim 17 (depends on 16) The rotor of claim 16, wherein the first magnet thickness is different than the second magnet thickness.