275 results about "Field coil" patented technology

The invention belongs to the technical field of electronic parts, and provides a damping-adjustable roller structure and a damping adjusting method. The first annular shaft is fixed to the mounting base, and a plurality of first bosses are evenly arranged on the end face of the first annular shaft; the second annular shaft is rotationally arranged on the mounting base, the second annular shaft and the first annular shaft are coaxially arranged, and second bosses are evenly arranged on the surface of the end, facing the first boss, of the second annular shaft; the first annular shaft is provided with a magnetic field coil, the magnetic field coil is used for adjusting the magnetic intensity of the first annular shaft, gaps are formed between the first bosses and the second bosses, and the first bosses and the second bosses are arranged in a one-to-one correspondence mode. The magnetic field intensity of the first annular shaft is changed by adjusting the current magnitude and direction of the magnetic field coil, so that the magnetic attraction force between the first boss and the second boss is adjusted, and the damping is adjustable when the second annular shaft rotates. Meanwhile, the magnetic field coil can convert kinetic energy of the second annular shaft into electric energy to achieve the technical effect of electric energy collection.

The invention discloses a water-cooling pulsed high-intensity magnetic field coil, and belongs to the technical field of pulsed high-intensity magnetic fields. The coil adopts a laminated structure, each laminated sheet is provided with an opening and a boss, and a spiral structure is formed through electrical connection of the bosses. Each lamination is divided into a through-flow part, a water cooling part and a fixed part; the through-flow part is made of red copper, the water cooling part and the fixing part are made of stainless steel, and an integrated copper-steel composite structure is formed through welding. The water-cooling part is provided with water-cooling grooves welded and sealed by a cover plate; and the water-cooling grooves of the laminations are connected in series through water inlet and outlet holes to form a cooling flow channel. The fixing part is provided with a semicircular fixing hole used for limiting and flow guiding. And an insulating sheet is arranged between the adjacent laminations. The coil is pressed tightly through the upper and lower pressing plates and an insulated fixing stud. Through lamination partitioning and copper-steel compounding, the high-strength and efficient water-cooling capacity is achieved, and the problems of insufficient strength and cooling of the pulse high-intensity magnetic field coil under repetition frequency work are effectively solved.

The invention discloses a transfer device and a transfer method for transferring a polar field coil of a nuclear fusion device, and relates to the technical field of transfer of parts of the nuclear fusion device. The transfer device comprises a moving mechanism, a supporting mechanism, a supporting piece and a limiting piece, the supporting mechanism is fixedly arranged on the moving mechanism, and a supporting arm is formed on the supporting mechanism; the supporting pieces are in one-to-one correspondence with the supporting arms, each supporting piece is movably arranged in the extending direction of the corresponding supporting arm, and a clamping cavity used for containing at least part of the polar field coil is defined in each supporting piece; the limiting pieces correspond to the supporting arms one to one, each limiting piece is arranged on the corresponding supporting arm, the limiting pieces and the supporting pieces are connected through adjusting pieces, and the adjusting pieces are used for adjusting the distance between the supporting pieces and the limiting pieces. According to the transfer device, the transfer requirements of the polar field coil with large size, heavy weight and strict requirements can be met, it is guaranteed that the polar field coil is accurate in pose and reasonable in stress in the transfer process, and the requirements of the dynamic load coefficient and the unbalance load coefficient are met.

The invention discloses a quadrupole / octupole composite iron system for beam homogenization. The composite iron system comprises a composite magnet current control device, a composite magnet main power supply and quadrupole / octupole composite iron, the composite magnet current control device is used for controlling a composite magnet main power supply to output quadrupole field coil current and octupole field coil current of quadrupole / octupole composite iron. The quadrupole / octupole composite iron is used for simultaneously generating a dominant quadrupole magnetic field and an octupole magnetic field, so that the effects of quadrupole iron and octupole iron can be simultaneously realized by only installing one transmission element; according to the invention, a quadrupole magnetic field and an octupole magnetic field are generated in the aperture of the composite iron, focusing and homogenization of beam envelope are realized at the same time, the number of transmission elements can be reduced, the length of a transmission line can be shortened, and the construction cost of the beam transport line is reduced. The problem that traditional quadrupole iron and octupole iron cannot be simultaneously installed at the maximum beam envelope position due to the space problem and cannot play a great role of a magnet is solved.

The invention discloses a high-temperature pipeline magnetostrictive guided wave sensor and a monitoring method, and relates to the field of ultrasonic nondestructive testing. According to the sensor, a wrinkled iron-cobalt alloy belt is used as a sensitive element, and the sensor is in dry coupling contact with a to-be-detected pipeline; the high-temperature-resistant static magnetic field coil is wound on the outer side of the aluminum pre-tightening ring in a solenoid mode, and a bias pulse excitation mode is adopted. Alternately winding the bottom end of the wrinkle structure of the wrinkle-type ferrocobalt alloy belt and the back surface of the belt material, controlling the wrinkle-type ferrocobalt alloy belt to excite a guided wave signal in a pulse section, and receiving the guided wave signal in a bias section; the dynamic magnetic field and the static magnetic field generated by the two groups of coils are perpendicular in direction, and torsional mode guided waves are generated in the high-temperature pipeline based on the reverse Weidmann effect. The sensor is easy to install and stable in performance, the whole structure is resistant to high temperature for a long time, and the engineering problem of high-temperature failure is solved. The method provided by the invention comprises the steps of optimizing pre-tightening force, pulse voltage and bias current parameters, so that the transduction efficiency is improved, and the capability of detecting new defects of the pipeline in high-temperature and variable-temperature states is enhanced.

A superconductor magnet system including a superconductor magnet including a plurality of field coils connected in series, each field coil having a plurality of turns including superconductor material. The system also includes a primary electric current source connected across the plurality of the field coils for supplying a DC electric current to the field coils to generate a magnetic field. The system further includes a secondary electric current source connected in parallel with the primary electric current source across a subset of the field coils for supplying an additional DC electric current to the or each field coil in the subset to modify or correct the magnetic field.

The electromagnetic flowmeter comprises a shell and a sphere, connecting pipes are fixedly connected to the two ends of the surface of the shell, first connecting flanges are fixedly connected to the ends, away from each other, of the two connecting pipes, a fixing cylinder is fixedly connected to the center of the top of the shell, and a second connecting flange is fixedly connected to the top end of the fixing cylinder; the sphere is rotationally connected to the center in the shell, a communicating groove is horizontally formed in the shell in a penetrating mode, a rotating mechanism for rotating the sphere is arranged in the shell, and indicating mechanisms are arranged on the two symmetrical sides of the surface of the shell. Through the arrangement of the ball body, the magnetic field coil can be conveniently placed during use, meanwhile, the magnetic field coil can be conveniently protected, and in the use process, the ball body can be rotated to facilitate connection and disconnection of fluid in the shell, so that the use effect of the device is improved, and meanwhile, a rotating disc can be driven to rotate; the flow direction of the fluid of the device can be facilitated through the indicating arrow arranged on the surface of the turntable, and the mounting convenience of the device is improved.

The utility model relates to the technical field of magnetic field coil brackets, in particular to an adjustable magnetic field coil bracket, which improves the supporting stability of a magnetic field coil, improves the convenience of rotating and adjusting the magnetic field coil, and improves the convenience of supporting and fixing magnetic field coils with different sizes. Comprising a base and a guide rail, the device comprises a base, a guide rail, a driving device, a power device, a limiting device, a supporting device, two sets of sliding blocks and two sets of supporting shafts, the two sets of sliding blocks are slidably installed on the outer side wall of the guide rail, and the driving device is arranged on the base and used for driving the two sets of sliding blocks to move oppositely. The two ends of the two sets of supporting shafts are rotationally installed on the inner side walls of the two sets of sliding blocks through driving of power devices, limiting devices are arranged on the two sets of sliding blocks and used for limiting the front sides and the rear sides of the supporting shafts, and the supporting devices are arranged on the base and used for supporting and limiting the tops of the magnetic field coils.

The invention discloses a magnetic field intensity adjustable melt stirring system and a control method, and relates to the technical field of metallurgical casting, the magnetic field intensity adjustable melt stirring system comprises a crystallizer having an inner wall and an outer wall, a cooling cavity being formed between the inner wall and the outer wall; the shielding cover is fixedly arranged outside the crystallizer in a sleeving mode, and the magnetic field coil single-layer units are arranged on the inner wall of the shielding cover. The magnetic field intensity adjusting unit is electrically connected with each magnetic field coil single-layer unit and is used for dynamically adjusting the amplitude, the frequency and the waveform of the input current; the solidification interface detection module is arranged on the side wall of the crystallizer and used for detecting the melt solidification interface position in real time; the control module is in signal connection with the solidification interface detection module and the magnetic field intensity adjusting unit. The gradient magnetic field is accurately matched with the melt solidification process, dendritic crystal crushing is accurately strengthened, a traditional rotating assembly is replaced, energy loss generated by bearing friction, mechanical damping, mechanical vibration and the like is eliminated, the mechanical structure is simplified, the electromagnetic efficiency is improved, invalid power supply is avoided, and energy consumption is reduced.

The present invention discloses a DC magnetic field testing device for a magnetic field coil, comprising a device main body, a display component provided on the front end surface of the device main body, a control button provided on the front end surface of the device main body, a charging port provided on the bottom of the device main body, a probe cable fixedly connected to the top of the device main body, a Hall probe fixedly connected to the other end of the probe cable, a rectangular block fixedly connected to the outer surface of the Hall probe, a protective tube fixedly connected to the right side surface of the device main body, a storage component fixedly connected to the back of the device main body, and a charging component provided on the bottom of the device main body; the DC magnetic field testing device for a magnetic field coil can more intuitively display the remaining power of the device by providing the display component, and can issue an alarm when the power is too low to remind the user to charge; the protective component provided can protect the Hall probe after use to prevent damage to the probe.

Provided is an RF shield that achieves a balance between an improved irradiation efficiency and suppression of eddy current-induced heat by a gradient magnetic field coil, while avoiding complexity of conductor pattern design for suppressing an eddy current by the gradient magnetic field coil.A cylindrical RF shield, which is one of elements constituting a high-frequency coil unit, is formed by rolling patterned conductive thin films formed on both front and back surfaces of an insulating sheet, front and back patterns of the patterned conductive thin film are mirror-symmetrical in a central axis direction of a cylinder, the front pattern is divided into two in the central axis direction, one side of two divided patterns is further divided into two in a circumferential direction, each of three independent pattern islands has slits such that strips are formed along to the cylinder axis direction, and each of the strips has a portion connected in an up-down direction at one location.

The invention relates to the technical field of nuclear fusion device installation, and discloses a polar field coil supporting device and a polar field coil jacking method.The polar field coil supporting device comprises a base, a vertical adjusting part and a horizontal adjusting part, and the horizontal adjusting part, the vertical adjusting part and the base are arranged in the vertical direction; the horizontal adjusting part comprises a first base, a horizontal supporting seat, a first adjusting mechanism and a second adjusting mechanism, and the first base is connected with the vertical adjusting part; the horizontal supporting seat is movably arranged on the first base in the first direction and the second direction. The first adjusting mechanism is arranged on the first base and drives the horizontal supporting base to move in the first direction. The second adjusting mechanism is arranged on the first base and drives the horizontal supporting base to move in the second direction. According to the polar field coil supporting device, the positions of the polar field coil in the vertical direction and the circumferential direction can be accurately adjusted, and the installation requirement of the polar field coil at the bottom of a nuclear fusion device is met.

Field winding rotary machine, with: a stator (24) having a stator core (32) and a stator coil (34) wound around the stator core; a rotor (26) having a rotor core (42) and a rotor field coil (44) wound around the rotor core; a rectifier element (52) connected between both ends of the rotor field coil; and a capacitor (54, 502) having one end connected to one end of the rectifier element and the other end connected to any point of the rotor field coil, wherein the rotor field coil has a first field coil part (44-1) connected in parallel with the capacitor and a second field coil part (44-2) connected between the other end of the rectifier element and the other end of the capacitor.

A polarization device comprising: a spin exchange optical pump for hyperpolarizing a noble gas, the spin exchange optical pump comprising a magnetic field coil arrangement configured to provide a static uniform magnetic field used by the spin exchange optical pump within a static uniform magnetic field region; and a storage holder for storing the hyperpolarized noble gas output from the spin exchange optical pump in a gas phase, the storage holder being located outside the oven of the spin exchange optical pump and inside the static uniform magnetic field region, and providing a corresponding storage space for storing and holding the hyperpolarized noble gas generated by the spin exchange optical pump.

The invention provides an electromagnetic ultrasonic transducer probe of a HalbacH permanent magnet assembly. The electromagnetic ultrasonic transducer probe comprises a shell, a magnet set, a coil assembly and a driving mechanism. The magnet group is accommodated in the shell, is formed by arranging a plurality of magnets according to preset polarities and is used for providing a bias magnetic field, and the coil assembly is arranged outside the shell, is positioned on one side close to the test piece and is used for exciting ultrasonic waves in the bias magnetic field and receiving ultrasonic signals reflected from the test piece after pulse current is introduced; a fixing frame is arranged on the periphery of the magnet set and used for installing and fixing the magnet set, a movable interval is formed between the fixing frame and the inner wall of the shell and located on the side, away from the test piece, of the magnet set, and the driving mechanism is installed on the shell, connected with the fixing frame and used for driving the magnet set to be away from or close to the coil assembly in the direction perpendicular to the test piece. And the distances between the magnet group and the coil assembly are different. The bias magnetic field intensity acting on the test piece is adjusted by adjusting the position of the magnetic assembly.

This optically pumped magnetic sensor module comprises: a cell in which an alkali metal is sealed; and a coil unit that generates a magnetic field to act on the cell. The coil unit has a support frame body formed in a shape conforming to a rectangular parallelepiped and disposed so as to surround the cell, and a plurality of coils provided on the support frame body. The support frame body includes a pair of first surfaces facing each other in a first direction, and a pair of second surfaces facing each other in a second direction perpendicular to the first direction. The plurality of coils include a pair of first coils. One of the pair of first coils extends from one of the pair of first surfaces over both of the pair of second surfaces. The other of the pair of first coils extends from the other of the pair of first surfaces over both of the pair of second surfaces.

A stellarator comprising a non-planar magnetic field coil with a cable as well as a method for providing a cable for a non-planar magnetic field coil in a stellarator is presented. Additionally, a cable and a method for manufacturing a cable are presented. The cable comprises an inner section (100) comprising multiple layers of superconductor material (200), the multiple layers of superconductor material (200) having a first orientation (210, 210a, 210b, 210c), an outer section (300) surrounding the inner section (100), the outer section (300) having a cross-section (310) with a second orientation (320, 320a, 320b, 320c), wherein the outer section (300) comprises a first conductive material (410) which fixes the first orientation (210, 210a, 210b, 210c), wherein the first orientation (210, 210a, 210b, 210c) changes along a length (50) of the cable (40) with respect to the second orientation (320, 320a, 320b, 320c).

A method for fabricating a high-temperature superconductor HTS field coil using one or more HTS strips. Each HTS strip includes a layer of HTS material. The method includes: winding the one or more HTS strips around an axis to form a field coil comprising a winding of HTS strips; and removing material from at least a portion of the one or more windings from the axial edges of the one or more HTS strips to reduce the extent of the one or more HTS strips along the axis of the field coil.

To provide a technique capable of preventing deformation of a conductive member fixed to a rotor.SOLUTION: A winding field motor includes: a rotor that is fixed to a motor case and includes a stator that generates a magnetic field by energization, a rotor core around which a field coil is wound, and a rotor shaft to which the rotor core is assembled, is disposed on an inner diameter side of the stator and relatively rotatable with respect to the stator; and a power supply device that includes a rotor and a stator that rotate integrally with the rotor shaft, and is electrically connected to the field coil by a conductive member. The winding field motor is configured so that the conductive member extends toward an outer diameter side of the rotor, and the rotor includes: a fixing part that fixes the conductive member to the rotor; and a restricting part that restricts the movement of the conductive member in a direction away from the rotor on an inner diameter side of the fixing part.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of magnetic measurement testing, and particularly relates to a magnetic moment coil calibration device and method, which can realize that a magnetic moment coil keeps still in the calibration process, realizes the change of magnetic flux through the change of current, and then calculates the magnetic moment through the variable quantity of the magnetic flux. In the invention, the relative position between the calibrated magnetic moment coil and the standard constant magnetic field coil as the magnetic flux induction coil is always kept fixed in the calibration process, so that the problem that the magnetic axis is difficult to align accurately due to physical movement in the traditional drawing method or overturning method is thoroughly avoided; therefore, the reference alignment precision and reliability of calibration are improved. Magnetic moment coils with different sizes can be matched through the magnetic flux induction coils with different uniform area sizes, and the problem that the pulling or overturning operability of large magnetic moment coils is poor can be avoided.

A rotor (60), which is applicable to a wound-field rotating electric machine (40), includes: a rotor core (61) having main pole portions (62) provided respectively for magnetic poles aligned in a circumferential direction, each of the main pole portions protruding in a radial direction; and a field coil (70) wound on the main pole portions of the rotor core. Moreover, the field coil has a coil end part (CE) located axially outside the rotor core. An annular member (103, 104, 182) is provided, on a radially outer side of the coil end part, in such a manner as to surround the coil end part.

To cool the gradient magnetic field coil unit more effectively. [Solution] The magnetic resonance imaging apparatus of the embodiment comprises a static magnetic field magnet, a gradient magnetic field coil unit, a cooling system, and a supply unit. The static magnetic field magnet stores a refrigerant. The gradient magnetic field coil unit is provided inside the static magnetic field magnet. The cooling system cools the gradient magnetic field coil unit. The supply unit supplies the refrigerant gas discharged from the static magnetic field magnet as the refrigerant vaporizes to the cooling system.

The utility model discloses a current sensor. The current sensor comprises a skeleton; the magnetic core is arranged in the framework, a detection channel is formed in the magnetic core, and the detection channel is used for allowing a transmission wire with current to be detected to penetrate through so that the transmission wire with the current can generate an induced magnetic field under the action of electromagnetic induction; the coil comprises a wire-removing wire turn and a wire-returning wire turn, and the wire-removing wire turn and the wire-returning wire turn are arranged in a crossed manner and are wound on the framework, so that the coil generates induced current under the action of an induced magnetic field; and the detection circuit is connected to the coil and is used for detecting the induction current generated by the coil. According to the technical scheme of the utility model, the problem that the measurement result of the current sensor of the wind power plant has errors due to the fact that the Rogowski coil is easily interfered by an external magnetic field during measurement in the background technology is solved.

The application belongs to the technical field of bimetal castings, and discloses a device and method for magnetic field assisted lost foam casting of magnesium-aluminum bimetal castings. The device comprises a sand box, a cast foam pattern, a solid insert, a steady magnetic field coil, a rotating magnetic field coil and an alternating current power supply. The sand box is filled with dry sand, the cast foam pattern is arranged in the dry sand, the solid insert is embedded in the cast foam pattern, and the opposite ends of the solid insert are connected to the alternating current power supply. The steady magnetic field coil is sleeved outside the cast foam pattern, and the rotating magnetic field coil is sleeved outside the periphery of the steady magnetic field coil. The rotating magnetic field coil can produce electromagnetic stirring in the melt. The electromagnetic stirring can make the melt flow strongly, promote the migration and diffusion of high melting point precipitated phases in the melt, and thus improve the uniformity of the solidification structure of the magnesium-aluminum bimetal interface.

The invention discloses a long-stroke proportional electromagnet which solves the problems that in the prior art, the displacement control precision of a proportional electromagnet is insufficient, and hovering at any position cannot be achieved. The device comprises a coil magnetic field unit and an armature magnetic field unit, the armature magnetic field unit is slidably arranged in the coil magnetic field unit, a reset assembly is arranged between the armature magnetic field unit and the coil magnetic field unit, the coil magnetic field unit is powered on, a coil generates a magnetic field, and the coil magnetic field unit and the armature magnetic field unit act to generate displacement. When the coil magnetic field unit is powered off, the reset assembly assists the armature magnetic field to return. The device is arranged in a modular nested mode along the axis, the coil magnetic field unit provides a controllable alternating magnetic circuit, the armature magnetic field unit achieves long-stroke stepless displacement under the magnetic coupling effect, and the reset assembly provides non-lagging return after power failure. The whole device forms a closed magnetic loop through an end cover-connecting rod system, has the functions of magnetic shielding and structure supporting, and is suitable for high-humidity and high-dust industrial environments.

The invention belongs to the technical field of magnetic measurement testing, and particularly relates to an implementation method of a multi-layer magnetic field coil, which can realize the consistency of the side-to-side ratio of different layers of coil windings. According to the implementation method of the multi-layer magnetic field coil, along with the increase of the number of winding layers, the edge-to-edge ratio of the multi-layer magnetic field coil can be kept unchanged all the time, it is ensured that the technical performance of the magnetic field coil is kept unchanged, and the consistency of the edge-to-edge ratios of different layers of coil windings is achieved.

To provide a technique capable of supporting a rotor shaft in a motor case without using a bearing having a complicated shape.SOLUTION: A winding field motor includes: a stator fixed to a motor case and configured to generate a magnetic field by energization; a rotor core around which a field coil is wound; a rotor shaft to which the rotor core is attached; and a power supply device attached to the rotor shaft and electrically connected to the field coil by a conductive member, and a rotor which is disposed on an inner diameter side of the stator and is rotatable relative to the stator. The rotor shaft is supported by the motor case via a bearing by a support sleeve provided on an outer periphery of the rotor shaft. The support sleeve accommodates at least the rotor shaft and the conductive member on an inner diameter side, and a seal member for closing a gap between an outer peripheral surface of the support sleeve and the motor case is disposed on a side of the power supply device with respect to the bearing in an axial direction.SELECTED DRAWING: Figure 1

The application relates to a dual-load inverter module and an inverter system. The dual-load inverter module comprises three bridge arms and a control module, wherein the bridge arm has a first end and a second end, and a first half-bridge and a second half-bridge are connected in series between the first end and the second end; the on-off state of the first half-bridge of any bridge arm is opposite to that of the second half-bridge on the bridge arm, so that the dual-load inverter module will not be in a straight-through short circuit state at any moment. The dual-load inverter module provides a circuit for independently controlling two polar field coils based on the three bridge arms, so that the cost is greatly reduced.

The invention discloses an organosilane-polyethylene glycol conductive additive as well as a preparation method and application thereof, and belongs to the field of electrode additives, 0.01 mol of organosilane, 0.05 mol of polyethylene glycol and 20mL of dimethyl sulfoxide are taken according to the molar volume ratio, the organosilane, the polyethylene glycol and the dimethyl sulfoxide are stirred in a closed inert reaction kettle provided with an alternating magnetic field coil and a magnetic heating stirrer, and the mixture is cooled to room temperature to obtain the organosilane-polyethylene glycol conductive additive. Magnetic induction self-heating stirring heating is carried out under argon protection, the temperature is controlled through a pulse heating-constant temperature heat preservation program, and removal is carried out for 24 hours under the vacuum condition of 110 DEG C; organosilane and PEG are subjected to a condensation polymerization reaction at a controllable temperature to construct a silane-based cross-linked network, and cross-linking behaviors are compared at different reaction temperatures to optimize the process; organosilane with different functional groups is selected to regulate and control the crosslinking density and the network structure; and mixing the cross-linked product serving as a conductive additive with an active substance, a conductive agent and a binder to prepare slurry, and coating and drying to prepare the electrode.

An integrated circuit includes a first conductive path over a substrate, a coil structure over the substrate, and a ferromagnetic ring. The first conductive path is configured to generate a first time-varying magnetic field based on a first time-varying current. The coil structure is configured to generate an induced electrical potential responsive to the first time-varying magnetic field. The ferromagnetic ring includes an open portion. The first conductive path extending through the open portion of the ferromagnetic ring. The first conductive path includes a first conductive line on a first level that is below the ferromagnetic ring, a second conductive line on a second level that is above the ferromagnetic ring, and a first via on a third level that is coplanar with the ferromagnetic ring, the first via electrically coupling the first conductive line and the second conductive line together.