120results about How to "Reduced eddy current effect" patented technology

Disclosed is a system for assisting in preventing over heating of the internal electrical components of a computer in the event of a failure of one of the adjacent fans of an array of fans employed to circulate cooling air over the components. The fans include openings through which air is forced from their inlet sides to their outlet sides. The system includes a vent for each fan arranged adjacent to and aligned with the fan opening at its outlet side. The vents are open and closed by vanes, having hinged slats construction to allow them to fall downwardly by their own weight or additional assistance. The vanes are kept open by the airflow created by the fans. Upon the failure of a fan, the absence of airflow through the opening thereof allows the slats of the vane to drop to close off the fan opening and prevent airflow into the fan opening from its outlet side.

An NFC card includes an antenna circuit including an antenna coil having at least one magnetic axis, and at least one integrated circuit linked to the antenna circuit. The magnetic axis of the antenna coil is substantially parallel to the plane of the card, and is at an angle of 45°±25° with respect to a longitudinal axis LX of the card. Embodiments of the invention are applicable in particular to SIM-NFC card and SD-NFC cards.

An NFC card includes an antenna circuit including an antenna coil having at least one magnetic axis, and at least one integrated circuit linked to the antenna circuit. The magnetic axis of the antenna coil is substantially parallel to at least one side of the card, and the card further includes at least one electrically conductive screen extending near the antenna coil, which does not cross the magnetic axis. The card does not include any magnetically permeable material between the at least one conductive screen and the antenna coil. Embodiments of the invention are applicable in particular to SIM-NFC card and SD-NFC cards.

The invention discloses a wave power generation device based on a linear magnetic gear motor. The wave power generation device comprises a motor stator core, a motor converter, a magnetism regulating ring, a magnetic gear low-speed moving part, an inner floating barrel and an outer floating barrel. The motor stator core is sleeved with the motor converter, the motor converter is sleeved with the magnetism regulating ring, the magnetism regulating ring is sleeved with the magnetic gear low-speed moving part, the magnetic gear low-speed moving part is sleeved with the inner floating barrel, and the inner floating barrel is sleeved with the outer floating barrel. A first air gap is formed between the motor stator core and the motor converter, a second air gap is formed between the motor converter and the magnetism regulating ring, and a third air gap is formed between the magnetism regulating ring and the magnetic gear low-speed moving part. A motor stator shaft and the magnetism regulating ring are fixed in position, and the magnetic gear low-speed moving part and the inner floating barrel are fixed in position. The wave power generation device has the advantages that no huge speeders need to be additionally arranged, the size is small, energy capture and power generation efficiency is high, and convenience is brought to design, debugging and maintenance of an electrical control system through the whole floating suspended structure.

The invention relates to the field of magnetic isolation material, and discloses a magnetic isolation material and a preparation method and application thereof. The magnetic isolation material comprises a magnetic layer and protective films and an off-type films arranged on different sides of the magnetic layer, wherein the magnetic layer comprises at least one magnetic material sheet layer. The magnetic material sheet layer comprises a plurality of magnetic material chips and the gap between the magnetic material chips are at least partially filled with air; a first glue layer is arranged between the protective film and the magnetic layer and a second glue layer is arranged between the off-type film and the magnetic layer. The preparation method overcomes the problems of complex preparation process of the magnetic isolation material in the prior art, and the prepared magnetic isolation material is with better performance.

The invention provides a design method for chip spiral inductor with gradual-change metal conductor linewidth and span. Wherein, it calculates the linewidth wn and nearby conductor span sn by following formula: for odd N, wN+w1=wN-1+w2=...=2w(N+1) / 2=2w, sN-1+s1=sN-2+s2 =...=s(N+1) / 2+s(N-1) / 2=2s; for even N, wN+w1=wN-1+w2=...=w(N / 2)+1+wN / 2=2w, sN-1+s1= sN-2+s2=...=2sN / 2=2s; and wn+1>wn, sn+1>sn. This invention reduces vortex effect and near effect generated by spiral inductor at HF to decreases serial equivalent resistance and energy loss.

The invention discloses a plane spiral inductor; the width of a lead wire of the plane spiral inductor is gradually increased from interior to exterior, the distance between the lead wires is gradually reduced from an inner ring to an outer ring; compared with the inductor with the traditional structure, eddy effect and proximity effect of the plane spiral inductor are reduced at high frequency, the series resistance of inductor coil lead wires is reduced, so as to improve the quality factor Q value of the inductor on the premise of not changing the domain area and the size of inner diameter; a preparation process of the plane spiral inductor is compatible to the conventional CMOS process, and the performance of an important functional unit at the CMOS radio-frequency front end can be improved.

The invention discloses an axial magnetic flux hybrid excitation memory motor which comprises a stator disc and a rotor disc of a Halbach structure, the stator disc is composed of a stator core and three-phase armature windings, the stator core comprises a stator yoke and stator teeth, a stator groove is formed between every two adjacent stator teeth, and the three-phase armature windings are wound on the stator teeth; the rotor disc meets a Halbach composite array, the outer side of the rotor disc is composed of a plurality of aluminum-nickel-cobalt permanent magnets and a plurality of pulseexcitation windings connected in series, the magnetizing directions of every two adjacent aluminum-nickel-cobalt permanent magnets are opposite, a soft magnetic material is arranged between every twoadjacent aluminum-nickel-cobalt permanent magnets, and the pulse excitation windings are wound on the aluminum-nickel-cobalt permanent magnets; neodymium-iron-boron permanent magnets are attached to the inner side of the rotor disc in a surface-mounted mode at a certain angle, and the magnetizing directions of every two adjacent neodymium-iron-boron permanent magnets are opposite. The motor is compact in structure, can achieve the flexible adjustment of an air-gap magnetic field of the motor, is wider in speed adjusting range, and is low in speed and large in torque.

The invention discloses a wire distribution structure for gradient coils connected in a parallel and layered mode. At least one of a GX gradient coil, a GY gradient coil and a GZ gradient coil is of a structure with at least two layers, a certain layer of a certain gradient coil is adjacent to the other layer of the same kind of gradient coil or is adjacent to a certain layer of a different kind of the gradient coil in the space, main coils of all layers of the same kind of the gradient coils are connected in parallel. The invention further discloses a wire distribution method for the gradient coils connected in the parallel and layered mode. By means of the wire distribution structure and method for the gradient coils connected in the parallel and layered mode, the great difference between the GX coil performance and the GY coil performance is avoided, and the performance of the whole gradient coils is improved.

The invention discloses a broadband low-loss passive balun on chip having a laminated winding structure. The balun on chip is provided with three layers of metal conducting wires. The metal conducting wires in a first layer are secondary conducting wires, the metal conducting wires in a second layer are primary conducting wires and the metal conducting wires in a third layer are ground wires. U-shaped continuous bent winding structures are formed between the heads and tails of the conducting wires of each layer. The geometrical shapes of all U-shaped bends are completely consistent. The U-shaped bends are broken from midpoints between the heads and tails of the secondary conducting wires in the first layer to form left and right discontinuous U-shaped bend sections. Single-end signals of an unbalanced end are connected with the heads of the primary conducting wires. The tails of the primary conducting wires are connected to the ground wires. The heads and tails of the secondary conducting wires are all connected with the ground wires. Breakpoints of the conducting wires in the same sections with the heads of the secondary conducting wires are normal phase signal output ends, and the breakpoints of the conducting wires in the same sections with the tails of the secondary conducting wires are inverted signal output ends. The single-end signals of the unbalanced end are convertedinto differential signals of a balanced end for output under the coupling action of the primary and secondary conducting wires. The ground wires reduce the insertion loss of the balun and simultaneously expand a gain bandwidth and a matched bandwidth.

An intake accelerator for an engine, the intake accelerator is installed in the front end of a pipe line at an intake of an engine to increase the efficiency of the engine. The main body of the accelerator is provided therein with a plurality of vortex guiding blades extending from a periphery to the center of the wall of a pipe, thereby a vortex passage is formed between every two neighboring ones of the vortex guiding blades; these vortex passages circle in the interior of the main body of the accelerator, so that after air flow enters the main body of the accelerator, it is guided to generate a plurality of vortexes running in the same direction, this can increase the air flow of the vortexes.

The invention discloses a disc type motor rotor with a pole shoe composite magnetic pole structure, and relates to the field of motors. The disc type motor rotor comprises a rotor supporting disc, a hole is formed in the center of the rotor supporting disc, and a groove is formed in the surface of one side of the rotor supporting disc and used for installing a rotor core and composite magnetic poles; the rotor iron core is of an annular structure, is arranged at the bottom of the groove and is tightly attached to the rotor supporting disc, T-shaped baffles distributed in the radial direction are arranged on a surface of a side, away from the rotor supporting disc, of the rotor iron core, and the T-shaped baffles divide the rotor iron core into a plurality of fan-shaped spaces at equal intervals along the circumference; the composite magnetic poles are arranged in the fan-shaped spaces on the rotor iron core; the composite magnetic poles comprise permanent magnets and pole shoes, and the pole shoes made of composite soft magnetic materials are installed on the surface of the permanent magnet. The radians of the pole shoes on the surface of the permanent magnet can be adjusted, sinewave air gap flux density is generated, the output torque of a motor is smooth, the pole shoes can protect the permanent magnets against field loss under the action of a demagnetization field, the field weakening capacity of the motor is improved, and the motor is easy to machine and suitable for batch production.

The invention discloses a medium cavity substrate integration waveguide structure based on a silicon through hole technology and a manufacturing technology thereof. A TSV three-dimensional packaging technology is used to integrate the substrate integration waveguide (SIW) structure into a three-dimensional chip system with a small volume. In the structure, a silicon substrate around TSV metal conductor columns is etched and a medium between the TSV metal conductor columns is changed into a high-molecular polymer benzocyclobutene (BCB) insulation material with a low dielectric constant from a low-resistance silicon substrate so that the eddy current effect of the silicon substrate in a high frequency circuit is eliminated, the corresponding high frequency losses of the silicon substrate donot exist, the power consumption of the substrate integration waveguide (SIW) structure of the invention is further reduced and a quality factor is increased. The resonant extraction of the substrateintegration waveguide (SIW) structure of the invention is greatly improved by the introduction of low-consumption high-molecular polymer benzocyclobutene (BCB) (filled in a BCB medium cavity).

Disclosed is a shielding structure for an integrated inductor / transformer, configured under the integrated inductor or the transformer and upon a substrate. The shielding structure comprises conductive units, first connecting portions, via holes, a second connecting portion and a grounding portion. Each conductive unit comprises a first conductive portion and second conductive portions extending from the first conductive portion. The number of the second conductive portions is odd. The length of each second conductive portion progressively diminishes from a center of the first conductive portion to both of two ends of the first conductive portion. The first connecting portion connects the first conductive portions of the conductive units through via holes. The grounding portion is connected to one of the first conductive portions. The second connecting portion connects all longest second conductive portions together. Moreover, the conductive units and the second connecting portion are made of different conductive materials.

The invention discloses a breeze-starting core-free wind power generator, in particular relates to a civil wind power generator which has large caliber and light weight and is capable of being breezily started. The breeze-starting core-free wind power generator comprises blades (1), a plurality of magnets (2), a core-free coil (4), a mainshaft (24), an outer rotor rim (13) and a motor support hollow rod (9), wherein the magnets (2) are distributed on an iron ring (21) in an outer rotor on the inner wall of the outer rotor rim (13), wherein the south and north pole surfaces of each magnet (2) are parallel to the direction of a rotation axis of the outer rotor rim (13), the south and north poles of the two adjacent magnets are in reverse direction, and a clearance with a half magnet width is formed between the two adjacent magnets. The breeze-starting core-free wind power generator has the advantages of increasing the diameter of the power generator, reducing the stress at the roots of the blades, improving the security, reducing the eddy-current effect by means of the core-free coil and improving the efficiency. By means of the breeze-starting core-free power generator, the weight of the power generator without a gearbox is lightened.

The invention provides an inductor substrate isolation structure of an integrated circuit. The inductor substrate isolation structure comprises a p-type substrate, an n-type well region formed in the p-type substrate and including a plurality of n wells, a plurality of p-type active regions formed in the plurality of n wells through injection, a polycrystalline silicon shielding layer covering the n-type well region and including a plurality of strips of n-type polycrystalline silicon, a metal layer covering the polycrystalline silicon shielding layer, and an inductor covering the metal layer, wherein each strip of n-type polycrystalline silicon covers two adjacent n wells, the plurality of strips of n-type polycrystalline silicon are spaced from each other by the p-type active regions, the metal layer is of an X-shaped metal structure which is arranged in the diagonal position of the n-type well region, and the center point of the inductor coincides with the center point of the X-shaped metal structure. By adopting the inductor substrate isolation structure of the invention, the electromagnetic loss of the inductor to the substrate can be effectively reduced, the coupling capacitance between the inductor, the shielding layer and the substrate can be reduced, and the quality factor and working frequency of the inductor can be improved.

The invention discloses an integrated structure of a radio frequency identification (RFID) antenna and a mobile communication terminal. The RFID antenna is formed by printed circuit board (PCB) wires distributed on a mainboard in the terminal. Feed points of the RFID antenna are connected with antenna contacts arranged on a card seat on the mainboard by the internal PCB wires. The antenna contacts are right in contact with antenna pins of an RFID chip after a smart card integrated with the RFID chip is inserted into the card seat. The design of the antenna provided by the invention is directly finished on the mainboard in a way of adopting the PCB wires, and a structural contact way is avoided, so the connecting reliability is greatly improved. Simultaneously, the positions of the wires of the RFID antenna are determined on the surface, away from a battery, on the mainboard, thereby ensuring that a sufficient distance can be reserved between the RFID antenna and a battery core to further greatly weaken eddy effects of metals without arranging an additional ferrite film and achieve the great advantages of reduction in terminal cost.

A mechanical sealing structure of a gas lubricating end face with human pyramid-like combined groove deep grooves comprises a moving ring and a static ring which are in mechanical seal. The end face of at least one seal ring between the moving ring and the static ring is provided with a plurality of human pyramid-like combined groove deep grooves spirally evenly distributed in the circumferential direction, and the human pyramid-like combined groove deep grooves are gradually narrowed from the upstream part to the downstream part. The human pyramid-like combined groove deep grooves are composed of basic dynamic pressure grooves and human pyramid-like grooves. The bottom surfaces of the basic dynamic pressure grooves are provided with the human pyramid-like grooves, and the depths of the human pyramid-like grooves become shallow gradually from the upstream part to the downstream part. The human pyramid-like grooves are formed by splicing multiple rows of sub-grooves, the adjacent sub-grooves on the same row are separated through sealing weirs with the depths equal to that of the basic dynamic pressure grooves, the sub-grooves on one downstream side stride over the sealing weirs between two sub-grooves of adjacent rows on the upstream side and are communicated with the sub-grooves on the two sides of the sealing weirs on the upstream side, and a sealing dam is arranged on the downstream part of the end face.

The invention discloses a food waste treatment method. In order to solve the problem of poor treatment of high-hardness and low-density food wastes such as bones, the invention provides the technical scheme as follows: when the food wastes are treated, the food wastes are firstly placed, then the water is supplied for wetting the food wastes; the water flow can enable the food wastes to flow more easily; the food wastes can be ground at the moment, so that the machine cannot be stuck by the food wastes; during wet grinding, the food wastes such as bone wastes cannot be further crushed because of eddy flow effect, then the water supply is stopped for carrying out dry grinding; in the absence of the buffering of the water flow, the machine directly acts on the food wastes to crush the food wastes; the crushing effect is better; meanwhile, after the food wastes are wet ground, particles become smaller, so that the machine cannot be easily stuck; the food wastes are further crushed by dry grinding at the moment, so that the food wastes are more finely ground; the treatment effect is better; finally, the water is supplied again for washing the food wastes; and the treatment is ended; the influence of waste residues on the cleanness of the machine is avoided.

An NFC card includes an antenna circuit including an antenna coil having at least one magnetic axis, and at least one integrated circuit linked to the antenna circuit. The magnetic axis of the antenna coil is substantially parallel to the plane of the card, and is at an angle of 45°±25° with respect to a longitudinal axis LX of the card. Embodiments of the invention are applicable in particular to SIM-NFC card and SD-NFC cards.

The invention is used in the field of microelectronics, and provides an 8-shaped inductor structure integrated on a semiconductor chip, and a semiconductor structure. The inductor structure comprisesa jumper metal strip arranged on a first metal layer, a first spiral coil arranged on a second metal layer and a second spiral coil arranged on the second metal layer, wherein winding directions of the first spiral coil and the second spiral coil are the same; a coil winding number of each of the first spiral coil and the second spiral coil is at least two, a starting point of the first spiral coil is connected with the first end of the jumper metal strip, a starting point of the second spiral coil is connected with the second end of the jumper metal strip, and an end point of the first spiralcoil is connected with an end point of the second spiral coil; and the outermost coil of the first spiral coil or the second spiral coil is provided with an opening, and the coils positioned on two ends of the opening serve as an input end and an output end of the 8-shaped inductor structure separately.

The invention provides an adjustable rotating magnetic field vacuum explosion chamber. The adjustable rotating magnetic field vacuum explosion chamber comprises a pair of conductive rods, a shielding cover, a pair of disk shaped contacts, an insulation casing, a rotating magnetic field generation device and an amplitude and frequency adjustment device, wherein the insulation casing is arranged at an outer side of the shielding cover, the rotating magnetic field generation device is fixed outside the insulation casing, the rotating magnetic field generation device and the disk shaped contacts are coaxially arranged, the amplitude and frequency adjustment device is connected with the rotating magnetic field generation device, a magnetic field generated by the rotating magnetic field generation device is adjusted, the conductive rod is connected with the disk shaped contacts, and the disk shaped contacts are coaxially and oppositely arranged in the shielding cover. The adjustable rotating magnetic field vacuum explosion chamber is advantaged in that the rotating magnetic field generation device is completely disposed outside the insulation casing of the explosion chamber, gas generation possibility is avoided, the generated transverse magnetic field is more concentrated between the contacts, namely the arc portion, and closing and opening of the contacts are further facilitated.

The present invention relates to a superconducting hollow cable and a method for the production thereof. The superconducting hollow cable (1) has an outer tube (2) which has a circular inner cross-section and a cylindrical inner wall (3). In addition, the superconducting hollow cable (1) has a central cooling channel (4) of a polygonal or circular cross-section that is, however, smaller than the inner cross-section of the outer tube (2). Arranged between the outer tube (2) and the cooling channel (4) are profiled superconducting wires (5). These profiled superconducting wires (5) have a cross-sectional profile which corresponds to a key stone as known for Roman stone bridges or for groin vaults. For the purpose, the cross-sectional profile has at least one outer region (7) of curvature and an inner region (8), the outer region (7) of curvature being matched to the inner radius of the outer tube (2) and the inner region (8) being matched to the cooling channel (4). The side edges (12, 13) too can be profiled either rectilinearly towards the centre-point (11) of the cooling channel (4) or by means of an offset from that rectilinearity.

The present invention discloses an electromagnetic shielding assembly including an electromagnetic interference shielding component including a plate body and a bending portion. An included angle is formed between the plate body and the bending portion, and the plate body and the bending portion cover an input socket of a power supply. The electromagnetic interference shielding component includes at least one grounding pin disposed on the plate body or / and the bending portion and configured to ground with and screw to a housing of the power supply, and a welding pin disposed on a side of the bending portion away from the plate body and electrically connected to an auxiliary circuit board. The electromagnetic interference shielding component provides functions of EMI shielding, lightning (current) discharging and fixture, which can simplify the structure, increase the discharging speed and time, and reduce the amount of disturbance of the large current instantaneous to the ground.

The invention discloses a method for effectively correcting a main magnetic field of a magnetic resonance imaging system. During a scanning process of the magnetic resonance imaging system, imaging space of the magnetic resonance imaging system is divided into two parts by a sickbed, one is the part above the sickbed, involved in the imaging scanning process, of the imaging space, and the other one is the part under the sickbed, separated from the imaging scanning, of the imaging space. When harmonic components shaped like a Chinese character 'tian' which are larger than the target uniformity of the main magnetic field of the system exist in the part, under the sickbed, of the imaging space of the magnetic resonance imaging system, shimming can be only conducted on the part above the sickbed, involved in the imaging scanning process, of the imaging space; shimming is conducted on the whole imaging space of the magnetic resonance imaging system otherwise. According to the method for effectively correcting the main magnetic field of the magnetic resonance imaging system, a standard shimming hardware system is not changed, and the method for effectively correcting the main magnetic field of the magnetic resonance imaging system is applicable to the vast majority of the magnetic resonance imaging systems for human body imaging.

The invention discloses a wireless power transmission module, a wireless power supply transmitting terminal apparatus and an electrical apparatus. The wireless power transmission module includes a module insulation main body used for winding wires, a first shielding body which is arranged at one end surface of the module insulation body, and a second shielding body which is arranged at one end surface of the first shielding body. According to the invention, the wireless power transmission module is provided with the shielding bodies, and therefore, electromagnetic interference on other apparatuses, which are caused by the wireless power transmission module, can be avoided, and heat emission inside the electrical apparatus, which is caused by the wireless power transmission module in the electrical apparatus because of electromagnetic induction, can be avoided, and safety hidden risks in the use process of the electrical apparatus can be eliminated.

The present invention discloses a motor magnet ring and a magnet for reducing an eddy-current effect. The motor magnet ring comprises a magnet arranged in an annular shape. The magnet is provided witha cutting groove, and at least one cutting groove with two disjoint ends is arranged on the motor magnet. The invention can effectively increase the resistance of the magnet, effectively reduces theeddy-current effect in the magnet during the operation of the motor, reduces the heat generation and the thermal damage of the magnet and improves the efficiency of the motor. The invention can be widely applied to various permanent magnet motors.

The invention discloses a high-voltage isolation switch shunt system. The high-voltage isolation switch shunt system comprises a wire holder, an internal wire and a drainage wire, wherein the internal wire is arranged inside the wire holder; and the drainage wire is arranged outside the wire holder and is connected with the internal wire in parallel. The drainage wire is arranged on the outer side of an original isolation switch wire holder, the drainage wire and an original wire inside the wire holder form a parallel connection relation, a part of current passing through the original wire is shunted to the drainage wire, and the current on the original wire is correspondingly reduced, so that the calorific value of the wire holder is reduced, and the operation of the calorific value in a safe range is guaranteed. In the design, the isolation switch does not need to be replaced completely, and the wire holder also does not need to be dismantled to maintain components, so that time, troubles and money are saved, the problem of heating is thoroughly solved, and the service life is long.

The invention discloses a figure filler structure inserted about an inductor. The figure filler structure are characterized by a plurality of square metal blocks with the same height as an inductor metal coil, the square metal blocks are inserted in an inside area and an outside area of the inductor metal coil which is positioned on a top metal layer; the side length of the square metal block is equal to a first minimum design rule which is the minimum measurement allowed by the technology; the density of the figure filler structure is not less than a second minimum design rule which is the minimum value for the density of the figure filler structure; the distance between the square metal blocks can be any measurement value in the scope from a third minimum design rule to the maximum distance value which is the distance between the square metal blocks when the density of the figure filler structure is equal to the second minimum design rule; and the third minimum design rule is the minimum distance between metals allowed by the technology. The invented structure effectively enhances the quality factor of inductor.