# US 12,184,136 B2 · Rotating electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,136 B2 - Document ID: US12184136B2 - Status: Granted - Kind: B2 - Application number: 18/008,447 - Filed: 2020-07-31 - Published: 2023-06-22 - Granted: 2024-12-31 - Earliest claimed: 2020-07-31 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Takayuki Yasumori; Takahiro Mizuta; Kosho Yamane - Web page: https://patentgrep.com/patent/US12184136B2 ## CPC - H02K 16/00: Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)} - H02K 21/44: with armature windings wound upon the magnets - H02K 1/17: Stator cores with permanent magnets - H02K 1/24: Rotor cores with salient poles {; Variable reluctance rotors} - H02K 5/161: {radially supporting the rotary shaft at both ends of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)} - H02K 5/24: specially adapted for suppression or reduction of noise or vibrations - H02K 2201/06: Magnetic cores, or permanent magnets characterised by their skew - 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 In a rotating electric machine, an axis direction width of a rotor core arranged at an end of a load side of the rotating shaft is set to be γ, an axis direction width of a rotor core arranged at an opposite side end of the load side is set to be ε, a distance from a support part at the load side to the rotor core at the load side is set to be α, and a distance from a support part at the opposite side of the load side to a rotor core at the opposite side of the load side is set to be β. In a case of α>β, γ≥ε is satisfied, and in a case of α<β, γ≤ε is satisfied. Thereby, the vibration of the rotor can be suppressed effectively. ## Claims ### Claim 1 A rotating electric machine having a stator and a rotor, the rotor provided on a rotating shaft, whose both sides are supported rotatably by support parts, and divided into a plurality of rotor cores, wherein, among the plurality of rotor cores, an axis direction width of a rotor core arranged at an end of a load side of the rotating shaft is set to be γ, an axis direction width of a rotor core arranged at an opposite side end of the load side of the rotating shaft is set to be ε, a distance from a support part at the load side to the rotor core at the load side is set to be α, and a distance from a support part at the opposite side of the load side to a rotor core at the opposite side of the load side is set to be β, further wherein, in a case of α>β, γ≥ε is satisfied, and in a case of α<β, γ≤ε is satisfied. ### Claim 2 A rotating electric machine having a stator and a rotor, the rotor provided on a rotating shaft, whose both sides are supported rotatably by support parts, and divided into three rotor cores, wherein, when axis direction widths of the three rotor cores are set to be γ, δ, and ε, from a load side of the rotating shaft, a ratio of γ+ε:δ is in a range of 2:1.6 to 2:1.9. ### Claim 3 (depends on 1) The rotating electric machine according to claim 1, wherein the stator is divided into a plurality of stator cores, in accordance with axis direction positions of the rotor cores, the stator core has slots which have openings with a regular interval at an inner periphery side, and teeth parts which protrude with a regular interval at an inner periphery side, furthermore, the stator core has permanent magnets which are separated in the axis direction, from a center of the teeth part which faces to the rotor, toward a core back part which becomes an outer periphery of the stator core, and are magnetized so that magnetic poles may face each other for every teeth part, the permanent magnets are provided, reversing their magnetic poles for every stator core divided in the axis direction, the rotor core has salient poles which are arranged at a regular angle pitch in a circumferential direction, and the position of the salient pole is deviated by ½ pitch in the circumferential direction, for every rotor core divided in the axial direction. ### Claim 4 (depends on 3) The rotating electric machine according to claim 3, wherein an axis direction gap is 4% or more of an axis direction full length of the stator core, where the axis direction gap is a space between adjacent cores among the stator cores which are divided in the axis direction. ### Claim 5 (depends on 3) The rotating electric machine according to claim 3, wherein an axis direction width of the rotor core which faces to a stator core divided in the axis direction is smaller than the axis direction width of the stator core. ### Claim 6 (depends on 3) The rotating electric machine according to claim 3, wherein axis direction end parts of respective opposing surfaces have a chamfered corner, where the respective opposing surfaces are with regard to the stator core divided in the axis direction and salient poles of the opposing rotor core. ### Claim 7 (depends on 3) The rotating electric machine according to claim 3, wherein an axis direction length of the permanent magnet provided in a stator core is shorter than an axis direction width of the stator core. ### Claim 8 (depends on 3) The rotating electric machine according to claim 3, wherein an axis direction length of the permanent magnet provided in a stator core is longer than an axis direction width of the stator core. ### Claim 9 (depends on 2) The rotating electric machine according to claim 2, wherein the stator is divided into a plurality of stator cores, in accordance with axis direction positions of the rotor cores, the stator core has slots which have openings with a regular interval at an inner periphery side, and teeth parts which protrude with a regular interval at an inner periphery side, furthermore, the stator core has permanent magnets which are separated in the axis direction, from a center of the teeth part which faces to the rotor, toward a core back part which becomes an outer periphery of the stator core, and are magnetized so that magnetic poles may face each other for every teeth part, the permanent magnets are provided, reversing their magnetic poles for every stator core divided in the axis direction, the rotor core has salient poles which are arranged at a regular angle pitch in a circumferential direction, and the position of the salient pole is deviated by ½ pitch in the circumferential direction, for every rotor core divided in the axial direction. ### Claim 10 (depends on 9) The rotating electric machine according to claim 9, wherein an axis direction gap is 4% or more of an axis direction full length of the stator core, where the axis direction gap is a space between adjacent cores among the stator cores which are divided in the axis direction. ### Claim 11 (depends on 9) The rotating electric machine according to claim 9, wherein an axis direction width of the rotor core which faces to a stator core divided in the axis direction is smaller than the axis direction width of the stator core. ### Claim 12 (depends on 9) The rotating electric machine according to claim 9, wherein axis direction end parts of respective opposing surfaces have a chamfered corner, where the respective opposing surfaces are with regard to the stator core divided in the axis direction and salient poles of the opposing rotor core. ### Claim 13 (depends on 9) The rotating electric machine according to claim 9, wherein an axis direction length of the permanent magnet provided in a stator core is shorter than an axis direction width of the stator core. ### Claim 14 (depends on 9) The rotating electric machine according to claim 9, wherein an axis direction length of the permanent magnet provided in a stator core is longer than an axis direction width of the stator core.