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AssigneesArtemis Intelligent Power Limited, Sauer-Danfoss ApS
InventorsWilliam Hugh Salvin Rampen, Niall James Caldwell, Uwe Bernhard Pascal Stein
Estimating the term…
The invention relates to a valve actuator (2), comprising a magnetic core (6) with an interspace (8) and at least one bifurcating branch (7), at least one variable magnetic field generating device (16), at least one permanent magnetic field generating device (13) and at least one movable magnetic component (12), wherein the bifurcating branch (7) defines a first region (4) and a second region (5) of said magnetic core (6). Said movable magnetic component (12) is movably arranged within said interspace (8) of said magnetic core (6) in such a way that a first gap (19) is formed between a first surface (23) of said movable magnetic component (12) and a first surface (22) of said interspace (8) of said magnetic core (6), a second gap (20) is formed between a second surface (24) of said movable magnetic component (12) and a second surface (25) of said interspace (8) of said magnetic core (6), and a third gap (21) is formed between a third surface (27) of said movable magnetic component (12) and a third surface (26) of said bifurcating branch (7) of said magnetic core (6). At least one of said variable magnetic field generating devices (48, 49) is associated with said first region (4) of said magnetic core (6) and at least one of said permanent magnetic field generating devices (13) is associated with said second region (5) of said magnetic core (6). Said valve actuator (2) is designed and arranged in a way that a magnetic flux, generated by at least one at least one of said variable magnetic field generating devices (16) is able to exert a force on said at least one movable magnetic component (12) and is able to cancel the magnetic flux (48, 49), generated by at least one of said permanent magnetic field generating devices (13). At least one magnetic flux limiting means (7, 12) is provided, whose magnetic flux limit can be reached or exceeded.
A valve actuator, comprising a magnetic core with an interspace and at least one bifurcating branch, at least one variable magnetic field generating device, at least one permanent magnetic field generating device and at least one movable magnetic component, wherein said bifurcating branch defines a first region and a second region of said magnetic core,
A method of operating a valve actuator, comprising a magnetic core with an interspace, at least one variable magnetic field generating device, at least one permanent magnetic field generating device and at least one movable magnetic component,
The method of operating a valve actuator according to claim 16, wherein the amount of said magnetic flux limitation is at least in part variable, and is preferably changing with the position of said movable magnetic component.
Dependencies are inferred from the claim text.