ROTOR CORE, ROTOR, AND ROTATING ELECTRICAL MACHINE

    公开(公告)号:US20240195241A1

    公开(公告)日:2024-06-13

    申请号:US18552918

    申请日:2022-03-28

    CPC classification number: H02K1/276

    Abstract: A rotor core has plural holes including holes in which permanent magnets are installed, the rotor core including: a high permeability portion; and a low permeability portion having a relative permeability that is smaller than a relative permeability of the high permeability portion and that is greater than a relative permeability of a vacuum, wherein an entirety of an inner peripheral bridge portion, at least part of a region of which is disposed at an inner peripheral surface side of the rotor core relative to at least one of regions where the permanent magnets are installed, is the low permeability portion.

    LAMINATED CORE AND ELECTRIC MOTOR

    公开(公告)号:US20220094218A1

    公开(公告)日:2022-03-24

    申请号:US17299886

    申请日:2019-12-17

    Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, each of the electrical steel sheets includes an annular core back part; a plurality of fastening parts are provided in the core back part at intervals in a circumferential direction; an adhesion region is formed on an outer circumferential side from the fastening parts in the core back part; and a non-adhesion region is formed on an inner circumferential side from the fastening parts in the core back part.

    CARRIER FREQUENCY SETTING METHOD, MOTOR DRIVING SYSTEM, AND CARRIER FREQUENCY SETTING DEVICE

    公开(公告)号:US20210091704A1

    公开(公告)日:2021-03-25

    申请号:US17051658

    申请日:2019-07-01

    Inventor: Yasuo OHSUGI

    Abstract: A motor can be driven so that the total loss of a loss of a motor and a loss of an inverter decreases. In a relationship between an optimum carrier frequency at which the total loss is minimized and a torque of a motor M, a lowest value of the optimum carrier frequency is derived, and a relationship between the torque of the motor M and the carrier frequency is determined to have a portion in which the carrier frequency is substantially constant or decreases as the torque of the motor M increases in a range equal to or less than the torque of the motor M corresponding to the lowest optimum carrier frequency and a portion in which the carrier frequency is substantially constant or increases as the torque of the motor M increases in a range equal to or more than the torque of the motor M corresponding to the lowest optimum carrier frequency.

    ROTOR CORE, ROTOR, AND ROTATING ELECTRICAL MACHINE

    公开(公告)号:US20240171024A1

    公开(公告)日:2024-05-23

    申请号:US18552916

    申请日:2022-03-28

    CPC classification number: H02K1/2766

    Abstract: A rotor core includes plural holes in which permanent magnets are installed, wherein: at least one of the plural holes includes a first end portion positioned on a leading side in a rotational direction, and a second end portion positioned on a trailing side in the rotational direction; the hole in which the first end portion is open has an inner space and a first outer space that communicates with the inner space, has the first end portion as one end portion of the hole in a left and right direction, and is wider than the inner space; and the first end portion is disposed off-center on the trailing side in the rotational direction relative to a circumferential direction center position of the inner space at the position where the inner space communicates with the first outer space.

    LAMINATED CORE AND ELECTRIC MOTOR

    公开(公告)号:US20220069640A1

    公开(公告)日:2022-03-03

    申请号:US17413121

    申请日:2019-12-17

    Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, the electrical steel sheet includes an annular core back part and a plurality of tooth parts that protrude from the core back part in a radial direction and are disposed at intervals in a circumferential direction of the core back part, a fastening part is provided in a portion of the core back part corresponding to the tooth part, and an adhesion part is provided in the tooth part.

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