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    Magnetorheological fluid clutch apparatus with cylindrical fluid gap
    1.
    发明授权
    Magnetorheological fluid clutch apparatus with cylindrical fluid gap 有权

    公开(公告)号：US10480594B2

    公开(公告)日：2019-11-19

    申请号：US15785916

    申请日：2016-04-21

    Applicant: EXONETIK INC.

    Inventor： Jean-Sebastien Plante ,  Marc Denninger ,  Guifre Julio ,  Patrick Chouinard ,  Pascal Larose

    IPC: F16D37/02 ,  F16D29/00 ,  B64C27/59 ,  F16D37/00

    Abstract: A magnetorheological fluid clutch apparatus comprises a stator having at least an annular wall; a first rotor rotatably mounted to the stator, the first rotor having at least one first shear surface; a second rotor rotatably mounted to the stator for rotating about a common axis with the first rotor, the second rotor having at least one second shear surface opposite the at least one first shear surface, the shear surfaces separated by at least one annular space. A magnetorheological (MR) fluid is in an MR fluid chamber including the at least one annular space, the MR fluid configured to generate a variable amount of torque transmission between the rotors when subjected to a magnetic field. An inner magnetic core and an outer magnetic core with an annular cavity therebetween receive the annular wall of the stator, the inner magnetic core and the outer magnetic core connected to at least one of the rotors to rotate therewith so as to be rotatably mounted to the stator. Outer and inner fluid gaps are between the inner magnetic core and the annular wall, and between the outer magnetic core and the annular wall, the outer and inner fluid gaps filled with at least one fluid. At least one coil is supported by the annular wall and actuatable to deliver a magnetic field through the MR fluid, the magnetic field following a path comprising the annular wall, the outer fluid gap, the outer magnetic core, the at least one first shear surface and the at least one second shear surface,the inner magnetic core and the inner fluid gap, wherein one of the rotors is adapted to be coupled to a power input and the other of the rotors is adapted to be connected to an output whereby actuation of the at least one coil results in a variation of torque transmission between the rotors.

    Magnetorheological fluid clutch apparatus with low permeability drums
    2.
    发明授权
    Magnetorheological fluid clutch apparatus with low permeability drums 有权

    公开(公告)号：US11499594B2

    公开(公告)日：2022-11-15

    申请号：US17284601

    申请日：2019-10-11

    Applicant: EXONETIK INC.

    Inventor： Jean-Sebastien Plante ,  Jérôme Marchand ,  Pascal Larose ,  Patrick Chouinard ,  Marc Denninger ,  Jean-Philippe Lucking Bigue

    IPC: F16D37/02 ,  F16D37/00

    Abstract: A magnetorheological fluid clutch apparatus comprises an input(s) having an input shear surface(s). An output(s) is rotatably mounted about the input for rotating about a common axis with the input, the output(s) having output shear surface(s), the input shear surface and the output shear surface separated annular space(s), with magnetorheological fluid, configured to generate a variable amount of torque transmission between the sets of input rotor and output rotor when subjected to a magnetic field. An electromagnet(s) delivers a magnetic field through the magnetorheological fluid, the electromagnet configured to vary the strength of the magnetic field, whereby actuation of the electromagnet results in torque transmission from the input to the output. A member(s) defining at least one of the shear surfaces is made of a low-permeability material.

    System and method for operating magnetorheological fluid clutch apparatus
    6.
    发明授权
    System and method for operating magnetorheological fluid clutch apparatus 有权

    公开(公告)号：US11911907B2

    公开(公告)日：2024-02-27

    申请号：US17047090

    申请日：2019-04-23

    Applicant: EXONETIK INC.

    Inventor： Pascal Larose ,  Patrick Chouinard ,  Jean-Sebastien Plante ,  Guifre Julio

    IPC: B25J9/16 ,  F16D37/02 ,  B60G17/015 ,  F16D37/00

    CPC classification number: B25J9/1664 ,  B25J9/1641 ,  F16D37/02 ,  B60G17/015 ,  F16D2037/001

    Abstract: A control system for controlling movements of an end effector connected to a clutch output of magnetorheological (MR) fluid clutch apparatuses. A clutch driver drives the MR fluid clutch apparatuses between a controlled slippage mode, in which slippage in the MR fluid clutch apparatuses varies, and a combined mode, in which slippage between clutch input and clutch output is maintained below a given threshold simultaneously for both of the MR fluid clutch apparatuses, the two clutch outputs resisting movement of the end effector in the same direction. A mode selector module receives signals representative of a movement parameter(s) of the end effector, to select and switch a mode based on the signals. A movement controller controls the clutch driver and the motor driver to displace the end effector based on the selected mode and on commanded movements of the end effector for the end effector to achieve the commanded movements.

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