10 results about "Flux concentration" patented technology

Concentrator (100) for detecting defects in a ferromagnetic object (112) comprises flux concentrator (106), typically fixed in a center of the device (100), which has two or more magnet assemblies (104) disposed at each end of flux concentrator (106) for saturating the ferromagnetic object (112) passing through the device (100) or where device (100) is passing over the ferromagnetic object (112). Leaked flux emanated from the ferromagnetic objects (112) due to defects in the ferromagnetic object (112) is captured by the flux concentrator (106) and channelized onto sensors (202 and 204) embedded in the flux concentrator (106). Data gathered by the sensors (202 and 204) may be processed for exploring nature and characteristics of the defects in the ferromagnetic object (112).

The invention relates to a unique configuration of magnets or electromagnets arranged on the inside surface of a spherical housing. Using two hemispherical housings with attached electromagnets wound with tapered cylindrical windings mounted together to form a full spherically configured magnetic flux concentrator is presented with calculated flux lines. Tapered cylindrical wound electromagnets fulfill two needs, one is to help with the flux concentration and the other is to fit the coil on the inside of the spherical housing, maximizing mounting space and use of available volume. A coil gun is presented as a practical application using three concentrators ganged together.

A SERF atomic magnetometer measuring device integrating a flux guide-concentrator is disclosed. Placing the flux guide-concentrator at the front end of the SERF atomic magnetometer amplifies weak magnetic fields at a distance. Guiding the amplified magnetic field through the gas cell of the SERF atomic magnetometer improves the magnetometer's response signal, thereby increasing the signal-to-noise ratio of the magnetic measurement device. Furthermore, by designing the shape of the contact magnetic field surface, flux concentration amplification of the measured magnetic field within a specific range can be achieved, thus improving spatial resolution. The device is characterized by including a flux guide-concentrator set on the magnetic field input interface of the magnetometer probe. The combination of the flux guide-concentrator and the magnetometer probe constitutes a magnetometer head with sub-millimeter spatial resolution. The magnetometer head is connected to a three-dimensional displacement stage via a connecting rod.

The invention provides a method for preparing a magnetic flux collector in the vertical direction of a chip and a corresponding magnetic flux collector, and the method comprises the steps: preparing a preparation region with a trumpet-shaped or trapezoidal front view and a truncated cone-shaped three-dimensional structure at the bottom of a silicon substrate through the photoetching and etching technology, the bottom of the preparation region is wider than the top of the preparation region, and the preparation region does not penetrate through the silicon substrate; the bottom of the silicon substrate is arranged on the chip plane; depositing a magnetic flux concentrator material in the flared region to form a first magnetic flux concentrating unit; preparing a magnetic sensitive unit at the top of the silicon substrate by micro-nano processing, wherein the magnetic sensitive unit is positioned right above the first magnetic flux gathering unit; and preparing a second magnetic flux gathering unit symmetrical to the first magnetic flux gathering unit at the top of the magnetic sensitive unit. The magnetic flux collector is integrated in the z-axis direction of the chip to gather the magnetic flux, and the sensitivity of the magnetic sensitive unit with perpendicular anisotropy and the sensitivity of the sensor with the in-plane magnetic sensitive unit can be enhanced through the design.

This application relates to the field of high-power high-frequency power supply technology, and discloses a method and device for high-frequency application of planar transformers based on nanocrystalline magnetic cores. The method first establishes a simulation model and collects multi-physics field measured data, fusing them to form a full-dimensional multi-field dataset to accurately locate flux concentration areas, loss hotspot areas, and stress distortion areas. Then, it extracts flux features, constructs a magnetic domain-flux-loss coupling feature vector, and locates abnormal regions. Subsequently, it prepares a gradient nanocrystalline magnetic core based on the abnormal data, optimizes the core structure and winding topology to match the current and flux distribution. Next, it integrates the core and windings, adjusts the magnetic domain flux distribution, and debugs the matching state. Finally, it verifies the optimization effect through retesting, iteratively updates parameters, and solidifies a standardized parameter system. This application can effectively suppress high-frequency eddy current losses, improve uneven flux distribution and local overheating problems, enhance transformer operating efficiency and reliability, and achieve low-loss, high-stability high-frequency operating performance.

Concentrator for detecting defects in a ferromagnetic object comprises flux concentrator, typically fixed in a center of the device, which has two or more magnet assemblies disposed at each end of flux concentrator for saturating the ferromagnetic object passing through the device or where device is passing over the ferromagnetic object. Leaked flux emanated from the ferromagnetic objects due to defects in the ferromagnetic object is captured by the flux concentrator and channelized onto sensors embedded in the flux concentrator. Data gathered by the sensors may be processed for exploring nature and characteristics of the defects in the ferromagnetic object.

A transducer system has a magnetic core that includes a gap between two end surfaces of the magnetic core. A first cover structure is arranged adjacent to the first end surface, and a second cover structure is arranged adjacent to the second end surface. The first and second cover structures each include a material having a higher magnetic permeability than air. The first cover structure includes a first flux concentration surface, and the second cover structure includes a second flux concentration surface facing the first flux concentration surface. A magnetic flux measuring device is positioned between the first and second flux concentration surfaces. The cover structures concentrate the magnetic flux in the magnetic core onto the respective concentration surfaces. The concentration surfaces enable more accurate measurement of the magnetic flux.

The present subject matter relates to devices, systems, and methods for identifying the position of a movable component. A position sensor system is provided in which a Hall effect sensor is coupled to a fixed housing, and a plurality of magnets is coupled to a movable component that is movable to a sensing position at which the plurality of magnets is proximal to the Hall effect sensor. In this configuration, the plurality of magnets is arranged to produce an aggregate magnetic field having a flux concentration directed toward the Hall effect sensor when the plurality of magnets is in the sensing position.

The present subject matter relates to devices, systems, and methods for identifying the position of a movable component. A position sensor system is provided in which a Hall effect sensor is coupled to a fixed housing, and a plurality of magnets is coupled to a movable component that is movable to a sensing position at which the plurality of magnets is proximal to the Hall effect sensor. In this configuration, the plurality of magnets is arranged to produce an aggregate magnetic field having a flux concentration directed toward the Hall effect sensor when the plurality of magnets is in the sensing position.