Bi-stable electromagnetic actuator

    公开(公告)号:US12094674B2

    公开(公告)日:2024-09-17

    申请号:US17291176

    申请日:2018-11-05

    Applicant: HYDRO-QUÉBEC

    CPC classification number: H01H50/18 H01H47/22 H01H50/02 H01H50/44

    Abstract: A bistable electromagnetic actuator is described. The actuator includes a mobile assembly and a fixed assembly. The mobile assembly includes at least one pair of ferromagnetic plunger-cores, a frame integrally connecting the plunger-cores, and a guiding element. The fixed assembly includes a ferromagnetic core having cavities defined on each of its two sides configured to receive a corresponding one of the plunger-cores, at least one magnet positioned between the cavities in the core and being able to create a first magnetic flux, at least one coil operable via an excitation current to create a second magnetic flux, and a guiding element adapted to cooperate with the guiding element of the mobile assembly to allow the mobile assembly to move between a first and a second stable position. Methods for actuating the bistable electromagnetic actuator are also described.

    METHOD FOR THE PURIFICATION OF RAW CARBON NANOTUBES

    公开(公告)号:US20210107791A1

    公开(公告)日:2021-04-15

    申请号:US16498537

    申请日:2018-03-29

    Abstract: The present invention proposes a process for purifying raw carbon nanotubes to obtain an content in metallic impurities comprised between 5 ppm and 200 ppm. The process includes an increase in the bulk density of the raw carbon nanotubes via compacting to produce compacted carbon nanotubes. The process further includes sintering the compacted carbon nanotubes by undergoing thermal treatment under gaseous atmosphere in order to remove at least a portion of the metallic impurities contained in the raw carbon nanotubes, and consequently producing purified carbon nanotubes. These purified carbon nanotubes are directly usable as electronic conductors serving as basis additive to an electrode material without requiring any subsequent purification step. The electrode material can then be used to manufacture an electrode destined to a lithium-ion battery.

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