28 results about "Electropermanent magnet" patented technology

Provided is a magnet for use with an SSSV, an SSSV, a well system, and a method. The magnet, in one aspect, includes an electropermanent magnet. The magnet, in accordance with this aspect, further includes a self-powered protection circuit coupled to the electropermanent magnet, the self-powered protection circuit configured to switch the electropermanent magnet to the OFF state when the SSSV loses power.

A system in a vehicle includes a panel configured cover a portion of the vehicle through which a port extends and one or more electro permanent magnets arranged on the portion of the vehicle. The system also includes a controller to magnetize the one or more electro permanent magnets based on applying a current of a first polarity to the one or more electro permanent magnets such that the one or more electro permanent magnets on the portion of the vehicle couple to the panel, the panel being metal, or to one or more permanent magnets on a surface of the panel to lock the panel when the panel is in the closed position.

Clutch assemblies and associated methods are disclosed herein. In an example, a clutch assembly comprise a first terminal, a second terminal, a clutch body enclosing a torque transfer fluid, and one or more electropermanent magnets (EPMs), each configured to generate a respective EPM magnetic field. The clutch assembly is configured to transmit a torque between the first terminal and the second terminal with a torque capacity that is at least partially based on the EPM magnetic fields. In an example, a method of operating a clutch assembly comprises transitioning each of one or more EPMs to a fully depolarized state, a fully polarized state, or an intermediate polarization state. In an example, a method of operating a clutch assembly comprises controlling each of one or more EPMs of the clutch assembly to vary a total EPM magnetic flux generated by the one or more EPMs.

A ballast dispenser system and method for flight vehicles, such as high altitude lighter than air vehicles. The system passively retains ballast without power and deploys ballast in response to applying power. An electro-permanent magnet passively retains ballast within the dispenser. Application of power to a coil produces an opposing magnetic field that reduces the overall strength of a net magnetic field acting on the ballast. Lateral positional control of the electro-permanent magnet provides calibration and control of the retaining magnetic field strength. A collapsible silo may hold ballast prior to dispensing ballast and collapse upon landing for minimizing damage.

An electropermanent magnet array is provided. The electropermanent magnet array includes one or more of a plurality of electropermanent magnets of common length, arranged in a parallel fashion, and a planar pole piece, coupled to the first ends of the plurality of electropermanent magnets. Each electropermanent magnet includes a first and a second end opposite the first end.

A coupling device may include a first housing comprising. The coupling device may include a ferromagnetic material, a first electrical connector, and a second housing couplable to the first housing. The second housing may include a second electrical connector couplable to the first electrical connector. The coupling device may include an electro-permanent magnet electrically coupled to the second electrical connector and magnetically couplable to the ferromagnetic material; wherein the electro-permanent magnet is configured to switch between an ON state and an OFF state in response to a disconnection signal.

A coupling device may include a first housing comprising. The coupling device may include a ferromagnetic material, a first electrical connector, and a second housing couplable to the first housing. The second housing may include a second electrical connector couplable to the first electrical connector. The coupling device may include an electro-permanent magnet electrically coupled to the second electrical connector and magnetically couplable to the ferromagnetic material; wherein the electro-permanent magnet is configured to switch between an ON state and an OFF state in response to a disconnection signal.

The application discloses a falling recloser, which comprises a recloser, an inclined insulator and a tripping assembly. The tripping assembly drives a lever to separate from a rotating block through a bimetallic strip or a split coil, so that the insulator falls. A controller integrates a current transformer to take power, and a permanent magnet drives a vacuum tube to open and close. A mode switching assembly controls a micro switch through an outer rocker arm linkage inner rocker arm to switch an automatic reclosing (AUTO) mode or a direct falling (DIR) mode. The application has the functions of double-tripping redundancy, mode switching and high-stability power taking.

The invention belongs to the technical field of pressure vessel steel plate hoisting, and particularly relates to an electric permanent magnet hoisting tool for preventing hoisting damage of a hot rolling open flat plate and a using method. The electro-permanent magnet lifting appliance comprises a main beam and at least one electro-permanent magnet lifted on the main beam through an iron chain, the electro-permanent magnet is of a cuboid structure, the side faces of two long edges are each provided with a lifting assembly, the side faces of two short edges are each provided with a driving mechanism, and the driving mechanisms are connected with a transverse rod; two ends of the cross rod are respectively connected with a set of motion branch chain which is connected with the lifting assembly; the lifting assembly comprises a lifting beam, a copper plate and a lifting guide rod, the copper plate is fixed on the lower side of the lifting beam, the lifting guide rod is arranged on the upper side of the lifting beam, and the lifting guide rod and the electric permanent magnet form a lifting kinematic pair; and the driving mechanism is linked with the motion branch chain to realize up-down position switching of the lifting assembly. The low-hardness copper plate firstly makes contact with the steel plate to avoid scratching, no magnetic circuit gap exists, the magnetic force is guaranteed, stable operation is achieved through the force increasing and buffering structure, the structure is simple, and the cost is low.

Aspects of the invention include a computer peripheral device comprising an input element that operates based on a performance characteristic, an electropermanent magnet (EPM) assembly including a permanent magnet configured to generate a magnetic field and a magnetizing assembly configured to set an intensity of the magnetic field generated by the permanent magnet, and a magnetorheological (MR) material coupled to the input element. The MR material has a viscosity that changes based on the magnetic field and affects the performance characteristic of the input element.

A fluid transfer interface is provided. The fluid transfer interface includes one or more of first and second interface portions. The first interface portion includes a first portion of a fluid connector and one or more ferromagnetic surfaces. The second interface portion includes an extendable second portion of the fluid connector and one or more electropermanent magnets, laterally disposed around the second portion of the fluid connector, configured to be magnetized or demagnetized in unison. The one or more electropermanent magnets are further configured to provide attraction force to the one or more ferromagnetic surfaces when magnetized and couple the first interface portion to the second interface portion and provide no attraction force to the one or more ferromagnetic surfaces when demagnetized and allow the first interface portion to be decoupled from the second interface portion.

This invention discloses a quasi-zero stiffness vibration isolator, relating to the field of vibration isolation technology. A positive stiffness mechanism is disposed between a platform and a base, supporting the platform under external load and applying a restoring force opposite to and positively correlated with the platform's displacement direction when the platform displaces. A negative stiffness mechanism includes a mover and several electro-permanent magnet units, fixedly mounted on the base. One end of the mover is fixedly connected to the platform. The positive stiffness mechanism, the mover, and all the electro-permanent magnet units are symmetrically arranged about a symmetrical centerline, which is collinear with the direction of the external load force. The other end of the mover has a gap with each electro-permanent magnet unit in a direction perpendicular to the symmetrical centerline. The electro-permanent magnet units generate a magnetic field and apply a magnetic force to the mover in the same direction as the mover's displacement. Through the parallel connection of the positive and negative stiffness mechanisms, the vibration isolator achieves quasi-zero stiffness characteristics near its equilibrium position, thereby achieving low-frequency vibration isolation. This device can improve the reliability of the vibration isolator and extend its service life.

The disclosure herein relates to a panel including an electro-permanent magnet integrated in the panel, and an induction coil connected to the electro-permanent magnet to conduct current induced in the induction coil to the electro-permanent magnet such that the electro-permanent magnet can be switched between a magnetic state and a non-magnetic state. The disclosure herein further relates to a fastening construction, to an aircraft and to an opening device.

The proposed device (RH) is intended for providing an electrically adjustable, contactlessly operating magnetic cogging torque inhibition between an electro-permanent magnet (MAG) and a cogging torque ring (RR) which is rotatable about an axis of rotation (D) and has rotor pole shoes (PR) arranged in a distributed manner. The electro-permanent magnet comprises a magnetic core (MK), a coil (SP) surrounding said magnetic core, and a magnetic field conductor (Bo, Bu) connected to each pole end (PE) of the magnetic core. In order to provide the cogging torque inhibition, a suitable current pulse can be impressed into the coil. Both magnetic field conductors extend from the pole ends to the rotor pole shoes and form stator pole shoes at their respective ends, which stator pole shoes lie opposite the cogging torque ring having the rotor pole shoes. The two magnetic field conductors are connected to one another in a rotationally fixed manner. According to the invention, the magnetic field conductors each form a plurality of finger-shaped portions (Fo, Fu) each having a finger end piece (Eo, Eu). The finger end pieces are designed and oriented in a radial outer region (RA) of the electro-permanent magnet in such a way that the finger end pieces of one of the two magnetic field conductors engage between the finger end pieces of the other magnetic field conductor in order to form stator pole shoes having north and south poles which alternate in the circumferential direction.

The invention relates to the technical field of ship paint surface detection, and discloses a ship paint surface damage detection device which comprises a machine body, the bottom of the machine body is fixedly connected with a support, the bottom of the support is provided with a detection probe, the detection probe is connected with the machine body through a transmission line, and the two sides of the detection probe are symmetrically connected with movable blocks. The movable block is made of a material capable of being magnetically attracted, a fixed block installed on the support is arranged above the movable block, the fixed block is an electric permanent magnet, a connecting spring is arranged on one side of the fixed block, and the spring is connected with the bottom plate and the support. The magnetic thickness gauge is fixed below the camera of the ship decontamination robot, the effect of ship paint surface damage detection can be achieved while image acquisition is not affected, meanwhile, measured data can be wirelessly transmitted to a computer through the magnetic thickness gauge with a built-in Bluetooth interface, manual recording is facilitated, and the detection efficiency is improved. And accurate data can be provided for operations such as later paint make-up.

A kind of connecting mechanism based on floatable electropermanent magnet, it includes shell and multiple electropermanent magnets;Multiple electropermanent magnets are evenly arranged along annular according to the direction of magnetic pole polarity uniformity;And the magnetic pole of multiple electropermanent magnets all passes through the surface of shell;Each magnetic pole includes valley-shaped magnetic pole and ridge-shaped magnetic pole, the end of ridge-shaped magnetic pole is provided with outwardly extending protrusion, the end of valley-shaped magnetic pole is provided with inwardly extending recess, when two connecting mechanisms are docked, the protrusion of ridge-shaped magnetic pole in one connecting mechanism is inserted into the recess of valley-shaped magnetic pole in another connecting mechanism, permanent magnet is arranged on control circuit board, permanent magnet corresponds with valley-shaped magnetic pole and ridge-shaped magnetic pole respectively, the polarity towards magnetic pole side is same with the polarity of corresponding surface on the magnetic pole after magnetization.The present application combines magnetic connection and mechanical connection, and the torsion resistance and shear resistance are greatly improved.

The invention relates to the technical field of drill rod electromagnetic tooling, and discloses a drill rod electromagnetic tooling adaptive to different drill rod lengths, which comprises a main body, connectors are symmetrically connected to the bottom of the main body, a magnetizing and demagnetizing controller is mounted on each connector, the top of the main body is fixedly connected with a mechanical arm, an electric permanent magnet group is mounted at the bottom of each connector, and the electric permanent magnet group is mounted on the bottom of each connector. A sleeve shell connected to the main body is arranged above the connecting body, an inserting plate is movably inserted into the sleeve shell, a connecting block is connected to the outer end of the inserting plate, a guide plate is arranged at the top of the connecting block, an air pipe is connected to the outer side of the connecting block, and an elastic telescopic cylinder and an elastic telescopic rod are arranged in the connecting body. According to the electromagnetic tooling for the drill rod, the electric permanent magnet is arranged to be of a split structure, so that the electromagnetic tooling for the drill rod can adapt to drill rods with different outer diameters, the contact area between an electromagnetic connecting part of the tooling and the drill rod is increased, and the effect of improving the moving stability of the drill rod is achieved.

The invention provides an electric permanent magnet with a multi-axis polarity control function and a multi-axis polarity control method of the electric permanent magnet, and belongs to the technical field of electric permanent magnets. And the plurality of electromagnetic coils are integrated around the magnetic core and are used for carrying out multi-axis polarity control on the magnetic core. According to the technical scheme provided by the invention, the plurality of electromagnetic coils are integrated around the magnetic core, so that the magnetic polarity switching control of two or more shafts can be realized.

The invention provides a self-hold electromagnetic valve, and relates to the technical field of fuel system flow path on-off control. The electromagnetic valve comprises a valve seat, a coil unit, a movable iron core, a valve element, a fixed iron core, a permanent magnet and an elastic body, the bottom end of the coil unit makes contact with the valve seat, the movable iron core is movably arranged in a center shaft of the coil unit, the valve element is connected to the lower end of the movable iron core, and a flow path opening is formed in the position, opposite to the valve element, of the valve seat. The movable iron core can drive the valve element to move relative to the flow path opening, a main body of the fixed iron core is arranged in the center shaft of the coil unit and located above the movable iron core, the permanent magnet makes contact with the top end of the fixed iron core, and the two ends of the elastic body make contact with the valve seat and the movable iron core correspondingly. And if power failure occurs, the permanent magnet can also attract the movable iron core, so that the state of the electromagnetic valve is kept unchanged, the electromagnetic valve does not need continuous power supply, power consumption can be reduced, the temperature of the coil is reduced, and failure is prevented.

A device mount configured to selectively secure a device thereto. The device mount includes a housing defining an attachment portion, and an electropermanent magnet supported within the attachment portion. The electropermanent magnet is configured to emit a magnetic field that secures the device to the device mount. The device mount further includes a switch coupled to the housing and in communication with the electropermanent magnet. The switch is configured to selectively adjust the magnetic field of the electropermanent magnet to release the device from the device mount.

Provided is a magnet for use with an SSSV, an SSSV, a well system, and a method. The magnet, in one aspect, includes an electropermanent magnet. The magnet, in accordance with this aspect, further includes a self-powered protection circuit coupled to the electropermanent magnet, the self-powered protection circuit configured to switch the electropermanent magnet to the OFF state when the SSSV loses power.

A roller module includes a wheel disc, a magnetic conductor and an electro-permanent magnet assembly. The wheel disc is rotatable along a rotation axis line. The magnetic conductor is coaxially arranged and synchronously rotated with the wheel disc. The magnetic conductor includes a hub and plural spokes. The plural spokes are radially extended from the hub. The magnetic conductor is arranged between the wheel disc and the electro-permanent magnet assembly. When the electro-permanent magnet assembly is operated in the first operating status, the electro-permanent magnet assembly provides a first magnetic attraction force to at least one spoke in the axial direction. When the electro-permanent magnet assembly is operated in the second operating status, the electro-permanent magnet assembly provides a second magnetic attraction force to at least one spoke in the axial direction. The first magnetic attraction force is greater than the second magnetic attraction force.

Provided is a magnet for use with an SSSV, an SSSV, a well system, and a method. The magnet, in one aspect, includes an electropermanent magnet. The magnet, in accordance with this aspect, further includes a self-powered protection circuit coupled to the electropermanent magnet, the self-powered protection circuit configured to switch the electropermanent magnet to the OFF state when the SSSV loses power.

The system can include a valve cap positioned over an opening of the sterile container, the opening of the sterile container being sized to receive the valve cap. The system includes a valve frame attached to the lid of the sterile container and an electro-permanent magnet (EPM) assembly releasably magnetically coupled to the valve cap, the EPM assembly configured to orient the valve cap in an open position with a magnetic field and to orient the valve cap in a closed position by neutralizing the magnetic field in response to receiving an electric current.

A system can include a valve cap that is positioned above an opening of a sterilization container, the opening of the sterilization container being sized to receive the valve cap. The system includes a valve frame that is affixed to a lid of the sterilization container, and an electro-permanent magnet (EPM) assembly that is releasably and magnetically coupled to the valve cap, the EPM assembly being configured to orient the valve cap in an open configuration via a magnetic field and orient the valve cap in a closed configuration by neutralizing the magnetic field in response to receiving an electrical current.

A peripheral device may include a body. The device may include a scroll wheel rotatably coupled with the body. The scroll wheel may include a ferromagnetic rotor. The rotor may be generally annular and may define an open interior. The rotor may define a first plurality of teeth arranged about a periphery of the open interior. The device may include a stator disposed within the open interior. The stator may define a second plurality of teeth that are alignable with the first plurality of teeth. The stator may include a plurality of electro-permanent magnets. Each of the electro-permanent magnets may be disposed within a conductive coil. The device may include a position sensor that is configured to detect an angular position of the rotor. The device may include control circuitry that controls delivery of current to the electro-permanent magnets of the stator to controls a speed of the scroll wheel.

Provided is a magnet for use with an SSSV, an SSSV, a well system, and a method. The magnet, in one aspect, includes an electropermanent magnet. The magnet, in accordance with this aspect, further includes a self-powered protection circuit coupled to the electropermanent magnet, the self-powered protection circuit configured to switch the electropermanent magnet to the OFF state when the SSSV loses power.

The invention belongs to the technical field of electromagnetic control, and provides an electro permanent magnet controller which comprises a main control unit, a programmable magnetizing and demagnetizing drive circuit, a multi-channel state detection circuit and a cluster control interface. The cluster control interface receives a magnetizing instruction, a demagnetizing instruction, an unlocking signal and control information containing target magnetic force parameters, and outputs a magnetizing completion signal, a demagnetizing completion signal and an alarm signal; the main control unit allows magnetization and demagnetization after receiving the unlocking signal, and generates a driving control signal according to the target magnetic force parameter; the programmable magnetizing and demagnetizing driving circuit outputs a pulse current waveform determined by a pre-stored magnetizing step sequence program or a demagnetizing step sequence program so as to adjust the magnetic force; the multi-channel state detection circuit samples loop current, terminal voltage of the electro-permanent magnet and on-off characteristics and feeds back the loop current, the terminal voltage and the on-off characteristics to the main control unit, and the main control unit judges whether preset completion conditions are met or not, stops output and gives an alarm when not met or abnormal. The problems that in the prior art, magnetic force cannot be adjusted or the adjusting capacity is insufficient, state feedback in the magnetizing and demagnetizing process is lacked, a fault protection mechanism is imperfect, and integration and extension with an automatic system are difficult are solved.