Abstract: A passive magnetic constant-force apparatus comprises a geometry and arrangement of permanent magnets, ferromagnetic components, and non-magnetic structural components. The apparatus is easily and precisely adjustable, cost-effective, with a high load capacity, and with minimal parasitic forces. The apparatus is suitable for use as a counterbalance for vertical linear motion applications and may be integrated with or attached to a linear motion stage.

Abstract: The present invention discloses an intelligent circuit breaker capable of automatically releasing and tripping in power failure, with an electromagnetic force capable of controllably changing a current direction arranged between a permanent magnetic field force and a mechanical spring force, and three forces are designed on a straight line, the permanent magnet static iron core, the electromagnetic moving iron core and the electromagnetic coil are respectively fixed on the electromagnetic coil framework through a first shaft hole, a second shaft hole and a wire slot, a tripping energy storage spring is sleeved on the tripping transmission rod, a permanent magnet attraction reset shifting fork is arranged in a shifting groove of the tripping transmission rod, and one end of the tripping transmission rod is provided with a tripping connecting rod.

Abstract: A motor for a laundry appliance includes a drive shaft coupled to a drum at a first end. The rotor frame is coupled proximate the second end of the drive shaft, where the rotor frame includes at least one polymeric material. A central hub includes a core and a perimetrical ring that extends circumferentially around the core. A plurality of recesses are defined within a planar surface of the perimetrical ring, wherein a portion of the polymeric material is received within the plurality of recesses to secure the rotor frame to the central hub.

Abstract: Apparatus and associated methods relate to a valve having an actuator configured to translate a mass in a plane and a valve element located out of the first plane and configured to translate along a first linear axis. In an illustrative example, at least one of the mass and the valve element may include a magnetic source providing a persistent magnetic field and the other may include a non-magnetized, magnetically permeable mass. Reluctance-induced forces may, for example, translate the valve element towards the mass along the first linear axis when the mass is brought into register with a second linear axis. The first linear axis and the second linear axis may, for example, be colinear. Various embodiments may advantageously provide a valve requiring low energy input for operation.

Abstract: An on-off switchable magnet assembly is disclosed which has first and second magnets. The poles of the first magnet are aligned to first and second ferrous members. The second magnets move to align its poles to the first and second ferrous members so that flux from the same or different pole flows through the first and second members to switch the assembly on or off as a magnet assembly.

Abstract: The method for manufacturing the Halbach magnet array comprises a) magnetizing at least one first magnetic material piece and at least one second magnetic material piece in a direction parallel to a first direction, and b) magnetizing a third magnetic material piece in a direction parallel to a second direction perpendicular to the first direction, in this order. The first magnetic material piece and the second magnetic material piece are alternately arranged in the second direction with the third magnetic material piece interposed therebetween. The first magnetic material piece adheres to the adjacent third magnetic material piece via a non-magnetic layer with a thickness t1, the second magnetic material piece adhere to the adjacent third magnetic material piece via a non-magnetic layer with a thickness t2, and t1 and t2 satisfy a formula t1<t2.

Abstract: A linear actuator includes an electromagnetic coil and a stator cover extending over the electromagnetic coil. A set of magnets are disposed end-to-end to form a ring. The magnets are adjacent the electromagnetic coil but offset from the center of the coil. A ferromagnetic central ring disposed within the coil at the inner diameter thereof and next to the magnets. A non-ferromagnetic ring disposed within the coil at the inner diameter thereof extending between the central ring and the other side of the stator cover. A translator is disposed between the magnets and the central axis. The translator is latchable between two positions within the linear actuator depending on the magnetic flux and the direction in which the electric current is flowing.

Abstract: A magnetic assembly includes magnets arranged in a Halbach array. The magnets include a first magnet and a second magnet positioned adjacent the first magnet. The first magnet and the second magnet have adjacent surfaces. A cavity is formed in the each of the adjacent surfaces and is aligned with the cavity formed in the adjacent surface of the adjacent magnet. The magnetic assembly also includes a ferromagnetic pin positioned within the aligning cavities to connect the first magnet and the second magnet. The ferromagnetic pin has a size, a shape, and a magnetic permeability that facilitate a magnetic force between the first surface and the second surface inducing a magnetic flux path through the ferromagnetic pin such that an apparent magnetic force between the first surface and the second surface is one of i) a repelling force less than 5 newtons (N) and ii) an attracting force.

Abstract: Generally, a system for generating a magnetic field having a desired magnetic field strength and/or a desired magnetic field direction is provided. The system can include a plurality of magnetic segments and/or a plurality of ferromagnetic segments. Each magnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. Each ferromagnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. In various embodiments, a size, shape, positioning and/or number of magnetic segments and/or ferromagnetic segments in the system, as well as a magnetization direction of the magnetic segments can be predetermined based on, for example, predetermined parameters of the system (e.g., a desired magnetic field strength, direction and/or uniformity of the magnetic field, a desired elimination of a magnetic fringe field and/or total weight of the system) and/or based on a desired application of the system (e.g.

Abstract: An electrical switch includes a coil assembly, an armature rotatable about an axis of rotation and driven by the coil assembly, and a contact assembly having a contact spring directly connected to the armature. The contact spring is a spring pack including a plurality of springs. At least one of the springs of the spring pack is formed of a first material and at least another one of the springs of the spring pack is formed of a second material different from the first material.

Abstract: A magnet system for use in a nuclear magnetic resonance (“NMR”) apparatus includes a first magnet and a second magnet located on a backplane to form a gap therebetween, wherein the first magnet and the second magnet are each shaped to form trapezoidal prisms with dimensions selected to optimize a magnetic field at a target region in space external to the magnet system.

Abstract: An electronic lock device according to one embodiment includes a first magnetometer, a second magnetometer, a dynamic ferromagnetic component positioned between the first magnetometer and the second magnetometer, a processor, and a memory comprising a plurality of instructions stored thereon that, in response to execution by the processor, causes the electronic lock device to read sensor data from the first magnetometer and the second magnetometer, modify the sensor data to generate compensated sensor data that compensates for magnetic noise generated by the dynamic ferromagnetic component, and determine whether the door is in a closed state or an open state based on the compensated sensor data.

Abstract: An object is to provide a lifting-magnet attachment magnetic pole unit, a lifting magnet, a steel material conveying method, and a steel plate manufacturing method with which only one or a desired pieces of steel materials can be held. The present invention is a lifting-magnet attachment magnetic pole unit for a lifting magnet used to lift and convey a steel material with magnetic force. The lifting-magnet attachment magnetic pole unit includes a first split magnetic pole that is in contact with an iron core of the lifting magnet and has a branched structure, and a second split magnetic pole that is in contact with a yoke of the lifting magnet and has a branched structure. The first and second split magnetic poles are alternately arranged.

Abstract: Provided is a magnetic clamp device that reduces a magnetic flux leaking from a magnetic circuit passing through a permanent magnet and a magnetic pole member. The magnetic clamp device includes: a permanent magnet 20 surrounding a magnetic pole member 10 and disposed on a surface of a plate PL made of a magnetic body that magnetically clamps a mold in a magnetized state; and a reversible magnet 16 capable of reversing polarity and disposed at the rear of the permanent magnet 20. The magnetic pole member 10 is constituted by a plurality of magnetic pole pieces 101, 102, 103, and 104. Each of the magnetic pole pieces has a first lateral surface R with a shape corresponding to the opposite permanent magnet 20, and a second lateral surface T at which adjacent magnetic pole pieces oppose each other. The magnetic pole member 10 moves as the first lateral surfaces R are suction-adsorbed by the permanent magnet 20 without the second lateral surfaces T interfering with each other.

Abstract: A control device includes a moving portion, a magnetic element coupled to the moving portion, at least one magnetic sensing circuit responsive to magnetic fields, and at least one magnetic flux pipe structure. The magnetic element may comprise alternating positive and negative sections configured to generate a magnetic field. The magnetic element may be any shape, such as circular, linear, etc. The magnetic sensing circuit may be radially offset from the magnetic element, and the magnetic flux pipe structure may be configured to conduct the magnetic field generated by the magnetic element towards the magnetic sensing circuit. The magnetic element may generate the magnetic field in a first plane, and the magnetic sensing may be responsive to magnetic fields in a second direction that is angularly offset from the first plane. The magnetic flux pipe structure may redirect the magnetic field towards the magnetic sensing circuit in the second direction.

Abstract: A device for guiding charge carriers and uses of the device are proposed, wherein the charge carriers are guided by means of a magnetic field along a curved or angled main path in a two-dimensional electron gas, in a thin superconducting layer or in a modification of carbon with a hexagonal crystal structure, so that a different presence density is produced at electrical connections.

Abstract: Magnet array structure includes a first linear magnet array and a second linear magnet array having a first and a second arrangement of magnets, respectively, in which the first and the second arrangement of magnets are repeated along respective lengths of the first and second linear magnet array. The first and second arrangement of magnets include respective individual first and second magnet elements arranged along the respective length of the first and second linear magnet array so that no net magnetic forces parallel to the length of the first and second linear magnet array result on the first and second arrangement of magnets, respectively. The first arrangement of magnets is offset from the second arrangement of magnets so that the first arrangement of magnets and the second arrangement of magnets partially overlap.

Abstract: Disclosed is a design approach for intrinsically safe electromagnetic devices such as electrically actuated valves, motors, generators, or transformers intended for and capable of safe operation in explosive atmospheres or environments. The design employs a plurality of electrically insulated, intrinsically safe circuits cooperating to induce, or in the case of a generator, create a relatively large magnetic flux in the ferromagnetic core, or iron, of these devices. A method to construct such intrinsically safe devices is disclosed. These devices can be practically used in machines, mechanisms, valves, and manned or unmanned vehicles intended for safe operation in hazardous environments, for example underground coal mines or ATEX or EX classified facilities.

Abstract: The present disclosure provides a displacement detection circuit of a maglev rotor system and a displacement self-sensing system thereof.

Abstract: A decorative magnetic cover for use in attachment to a non-metallic surface such as window or screen is provided. The decorative magnetic cover includes a magnetized first half and a magnetized second half shaped substantially identical to the magnetized first half. Imprints are formed on outer surfaces of the first and second halves. There is also disclosed a method of forming a magnetic cover such that an inner surface of a first half of the magnetic cover has a first polarity and an inner surface of a second half of the magnetic cover has a second polarity opposite the first polarity to hold the magnetized first and second halve together about a surface.