49 results about "Flux concentration" patented technology

A permanent magnet synchronous machine includes a stator, and a rotor which defines with the stator an air gap. The stator includes a plurality of teeth which are disposed in spaced-apart circumferential relationship and separated from one another by a tooth pitch. Each of the teeth has a shaft which terminates in a tooth head adjacent the air gap, with the tooth heads of neighboring teeth being separated from one another by a slot. The tooth heads are constructed to prevent saturation. The rotor has permanent magnets which are aligned in flux concentration direction and arranged to define a pole pitch, wherein a pitch ratio of tooth pitch to pole pitch is ≧2.5.

A method of forming a ferromagnetic liner on conductive lines of magnetic memory devices and a structure thereof. The ferromagnetic liner increases the flux concentration of current run through the conductive lines, reducing the amount of write current needed to switch magnetic memory cells. The conductive lines are formed in a plate-up method, and the ferromagnetic liner is selectively formed on the plated conductive lines. The ferromagnetic liner may also be formed over conductive lines and a top portion of vias in a peripheral region of the workpiece.

The invention relates to an electric machine comprising a stator (10, 40) provided with a plurality of teeth (11, 41), each tooth supporting at lest one individual coil (13, 46, 47), an external rotor (30) which is radially arranged outside the stator and provided with constant magnets, an internal rotor (20) radially arranged inside the stator, provided with constant magnets and connected to the external rotor (30). At least one of the external (30) and internal (20) rotors is disposed in a flux concentration.

A method of forming a ferromagnetic liner on conductive lines of magnetic memory devices and a structure thereof. The ferromagnetic liner increases the flux concentration of current run through the conductive lines, reducing the amount of write current needed to switch magnetic memory cells. The conductive lines are formed in a plate-up method, and the ferromagnetic liner is selectively formed on the plated conductive lines. The ferromagnetic liner may also be formed over conductive lines and a top portion of vias in a peripheral region of the workpiece.

Methods of forming ferromagnetic liners on the top surface and sidewalls of conductive lines of magnetic memory devices. The ferromagnetic liners increase the flux concentration of current run through the conductive lines, reducing the amount of write current needed to switch magnetic memory cells. In one embodiment, an in-bound pole is formed at the bottom edge of conductive lines, further concentrating the flux.

The present embodiments provide methods and systems to homogenize illumination on a target. Some embodiments provide rotational symmetric dual-reflector solar concentrators that include a concave primary reflector with an aim-direction directed toward the sun to receive optical radiation in a far-field angle within an angle of acceptance and redirect radiation upward and centrally generating flux concentration, a secondary reflector positioned coaxial with said primary reflector to receive said redirected radiation and redirect radiation downward and centrally generating flux concentration solar rays, and a central target zone receiving said concentrated solar rays, where cross sections of said primary and secondary reflectors both further comprise a multiplicity of segments that establish a correspondence between pairs of segments, each of said segments of said primary reflector such as to image said angle of acceptance onto said corresponding segment of said secondary reflector to image onto said target zone.

A permanent magnet synchronous machine includes a stator, and a rotor which defines with the stator an air gap. The stator includes a plurality of teeth which are disposed in spaced-apart circumferential relationship and separated from one another by a tooth pitch. Each of the teeth has a shaft which terminates in a tooth head adjacent the air gap, with the tooth heads of neighboring teeth being separated from one another by a slot. The tooth heads are constructed to prevent saturation. The rotor has permanent magnets which are aligned in flux concentration direction and arranged to define a pole pitch, wherein a pitch ratio of tooth pitch to pole pitch is ≧2.5.

The present invention relates to a rotor (1) for rotating an electric machine having permanent magnets (7) and flux concentration, comprising: a shaft (2) extending along the rotational axis (X) of the rotor (1), a rotor body (3) placed on the shaft (2), the rotor body (3) comprising: - a central opening (4) for the mounting thereof on the shaft (2); - radially oriented recesses (5) wherein the permanent magnets (7) are placed; and in at least one angular space (40) separating two consecutive recesses (5), at least one cavity (6) leading neither to the central opening (4) nor to the two consecutive recesses (5), said cavity or cavities (6) located in said space occupying an angular area (a) around the rotational axis (X) of the rotor (1) greater than or equal to half of the angular area (ss) of said space (40).

A linear generator and a method for generating power using the same are provided. The linear generator includes a magnet module including magnets located between a plurality of flux concentration blocks, the magnets located on both sides of each of the flux concentration blocks being arranged such that the magnets having the same pole face each other, and a magnetic flux generated from the magnets is induced into both ends of each of the flux concentration blocks; and core modules including coils and located on both sides of the magnet module to generate induced electromotive forces in the coils by the magnetic flux as the core modules move

The invention relates to a rotor (1) of a rotating electric machine, having permanent magnets (7) and flux concentration. The rotor comprises a rotor casing (3) having radially oriented housings (5) in which the permanent magnets (7) are disposed. The width of each housing (5) over at least one portion that is in contact with the magnet (7) decreases extending away from the axis of the rotor (1). Moreover, each housing (5) opens at its radially inner end into a hole (6) extending from both sides of a midplane (M) of the housing (5).

A system for concentrating solar radiation onto a space debris object to vaporize includes a focusing system, an object tracking system and a positioning system. The focusing system has a total focal length fT, and includes a first focusing device and a second focusing device. The first focusing devices change from a compact state to a deployed state, and the compact surface area is less than the deployed surface area. The object tracking system determines the location of the object. The positioning system orients the focusing system such that solar radiation focuses on the space debris object.

Methods of forming ferromagnetic liners on the top surface and sidewalls of conductive lines of magnetic memory devices. The ferromagnetic liners increase the flux concentration of current run through the conductive lines, reducing the amount of write current needed to switch magnetic memory cells. In one embodiment, an in-bound pole is formed at the bottom edge of conductive lines, further concentrating the flux.

In order to allow a rotating electrical machine, which uses a permanent-magnet rotor with a flux-concentration construction for a rated power of more than 100 kW, to be assembled as easily as possible, two mutually adjacent half-yokes of two poles as well as magnets arranged between them in each case form a pole element which can be fixed on its own on the rotor body.

A magnetic layer for writing incorporates: a pole layer having an end face located in a medium facing surface; and an upper yoke layer. A first magnetic layer for flux concentration is connected to the pole layer at a location away from the medium facing surface, and allows a magnetic flux corresponding to a magnetic field generated by a first coil to pass. A second magnetic layer for flux concentration is connected to the upper yoke layer at a location away from the medium facing surface, and allows a magnetic flux corresponding to a magnetic field generated by a second coil to pass. When seen in the direction orthogonal to the interface between the second magnetic layer and the upper yoke layer, this interface is disposed at a location that does not coincide with the interface between the first magnetic layer and the pole layer.

A flux concentration-type motor includes a ring-shaped stator, in which coils are wound on a plurality of teeth radially arranged; and a rotor, located at the center of the stator, having a plurality of magnets arranged in a circumferential direction such that poles, having the same polarity, of the magnets face each other, and rotated by the interaction with the stator, so as to prevent the leakage of magnetic flux of the magnets, thereby improving the torque compared to a conventional surface mounted permanent magnet-type motor having the same volume, reducing the production costs, and facilitating the miniaturization of products.

A magnetic field sensor apparatus for determining two or three components of a magnetic field includes at least one Wheatstone bridge with two half-bridges, wherein each half-bridge includes at least two bridge resistors, and at least one of the two bridge resistors is a magnetic-field-sensitive resistor with respect to a magnetic field component in an X / Y magnetic field sensor plane, Arranged symmetrically between the two magnetic-field-sensitive bridge resistors is a ferromagnetic flux concentration element which generates magnetic field components which are anti-symmetric with respect to a Z magnetic field component oriented perpendicular to the X / Y magnetic field sensor plane and are in the X / Y magnetic field sensor plane. A coordinate aspect proposes a method for determining a two-dimensional three-dimensional orientation of an external magnetic field by such a magnetic field sensor apparatus.

The invention discloses a double-sided flux switching permanent magnet linear motor. The double-sided flux switching permanent magnet linear motor comprises a motor primary side and a motor secondary side, wherein the motor primary side comprises primary cores, armature windings and permanent magnets, a serrated groove structure is formed by the scattered arrangement of the primary cores, the adjacent permanent magnets are respectively arranged next to the two sides of the primary cores alternately, trunkings are formed in an upper-lower alternating way, the magnetizing directions of the adjacent permanent magnets are opposite, the armature windings are arranged in the trunkings, and a concentrated winding structure is formed through the spanning arrangement of a coil of one armature winding over one permanent magnet and two primary cores; the motor secondary side comprises secondary cores and secondary salient poles, the positions of the secondary salient poles are staggered, and a clearance is arranged between the motor primary side and the motor secondary side. A yoke core is not required by the motor primary side so that the weight of the motor primary side is lowered. The dynamic performance of a system can be improved through the moving primary side structure. Both the armature windings and the permanent magnets are arranged at the motor primary side, thereby facilitating the cooling of the motor. The waveform of motor parameters, such as induction potential can be optimized. The flux concentration effect of the permanent magnets can be utilized by the motor, and the power density of the motor can be improved.

A permanently excited synchronous machine includes a stator; a winding system arranged in grooves of a laminated core of the stator and forming winding overhangs on end faces of the laminated core, and a rotor connected in fixed rotative engagement to the shaft and having ferrite magnets which extend axially beyond the end faces of the laminated core. The rotor electromagnetically interacts with the stator across an air gap there between during operation of the permanently excited synchronous machine to cause a rotation about an axis of rotation. A flux concentration element is provided radially across each of the ferrite magnets of a magnetic pole and bundles magnetic field lines of the ferrite magnet onto an axial length of the laminated core of the stator. The flux concentration elements and held by a fixing element on the ferrite magnets of a magnetic pole.

A thermal flux steering device and method for steering thermal flux into a concentrated area is provided. The thermal flux steering device includes a matrix impregnated with a plurality of thermally conductive inclusions. The thermally conductive inclusions are angled so as to steer thermal flux into a concentrated area such as a thermal energy sink in communication with the matrix. The thermally conductive inclusions may be filler fibers or thermally conductive particles impregnated within the matrix. Orientation of the thermally conductive inclusions may be determined by detecting the thermal flux of the thermal energy source, the thermodynamic properties of the matrix and the thermally conductive inclusions, and the location of the flux concentration area.

A system for concentrating solar radiation onto a space debris object to vaporize includes a focusing system, an object tracking system and a positioning system. The focusing system has a total focal length fT, and includes a first focusing device and a second focusing device. The first focusing devices change from a compact state to a deployed state, and the compact surface area is less than the deployed surface area. The object tracking system determines the location of the object. The positioning system orients the focusing system such that solar radiation focuses on the space debris object.

A magnetic layer for writing incorporates: a pole layer having an end face located in a medium facing surface; and an upper yoke layer. A first magnetic layer for flux concentration is connected to the pole layer at a location away from the medium facing surface, and allows a magnetic flux corresponding to a magnetic field generated by a first coil to pass. A second magnetic layer for flux concentration is connected to the upper yoke layer at a location away from the medium facing surface, and allows a magnetic flux corresponding to a magnetic field generated by a second coil to pass. When seen in the direction orthogonal to the interface between the second magnetic layer and the upper yoke layer, this interface is disposed at a location that does not coincide with the interface between the first magnetic layer and the pole layer.

A geophone utilizing an Alnico-9 magnet and having an improved sensitivity over Alnico-9 geophones of prior art through the lengthening of the parasitic air gap between the upper and lower pole pieces which, results in less magnetic flux leakage. The flux concentration through the geophone coils is increased and shifted towards the ends of the magnet. The increase of sensitivity of geophone of the present invention over prior art geophones may exceed 3 dB. The axial length of the coil bobbin is increased, and the positions of the electrical coils are moved towards the ends of the magnet to align with the shifted magnetic flux.