183 results about "Field coil" patented technology

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 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 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.

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.

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 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.

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.

The application discloses a kind of triaxial SERF atom magnetometer quadrature double frequency modulation system and method, the system utilizes signal generation module to generate frequency f m The sine quadrature modulation signal of cosine is respectively driven SERF atom magnetometer X and Y axis magnetic field generating coil, and 2nf m Frequency sine signal of driving Z axis coil, through the integral filter of 3 groups of integral period integration, the open-loop magnetic field signal of X axis, Y axis and Z axis magnetic field component is obtained, and through control module, the driving current of three-axis magnetic field coil is controlled to generate compensation magnetic field, so that the open-loop magnetic field signal of X axis, Y axis and Z axis magnetic field component is zero, at this time, the magnetic field intensity of atom chamber is zero, and the compensation current output by control module is the X, Y and Z axis magnetic field intensity signal measured by triaxial SERF atom magnetometer.The system can directly extract triaxial magnetic field calculation signal from a laser signal, and eliminate the cross-coupling effect when triaxial magnetic field is calculated, improve the measurement range and quadrature of SERF atom magnetometer, with very high engineering application value.

Various embodiments disclosed herein comprise a system. The system comprises a coil, a magnetic field sensor, and a controller. The coil generates a spatially and temporally varying magnetic field. The magnetic field sensor measures the magnetic field and a background magnetic field. The magnetic field sensor provides a magnetic field measurement and a background magnetic field measurement to the controller. The controller determines the position and orientation of the magnetic field sensor based on the magnetic field measurement and the background magnetic field measurement. The controller transfers control signaling to modify the magnetic field based on the position and orientation of the magnetic field sensor to null the background magnetic field. The coil receives the control signaling and modifies the spatially and temporally varying magnetic field based on the control signaling to null the background magnetic field.

The invention discloses a global coil-assisted triaxial magnetometer array calibration method and system. The method comprises the following steps: S1, selecting a magnetic quiet and flat horizontal ground to arrange a horizontal global coil; s2, periodically installing a three-axis magnetometer array at equal intervals, aligning three axes of the magnetometer with a geomagnetic coordinate system as much as possible during installation, and appointing a rotation matrix; s3, opening a global magnetic field coil current source, applying current in positive and negative directions, recording the previous and later readings of the triaxial magnetometer, and calculating the difference value of the two readings; s4, calculating parameters beta and gamma based on the difference value of the two readings; s5, closing the global magnetic field, and recording the reading of each magnetometer in the geomagnetic field; s6, calculating a parameter alpha; s7, calculating a coordinate system rotation matrix by using the parameters alpha, beta and gamma; s8, converting the measured value of the three-axis magnetometer into the geomagnetic coordinate; and S9, repeating the calibration operation of the steps S3-S8 on each three-axis magnetometer, and calibrating all the magnetometers. The method does not use an accelerometer, and is simple and convenient to operate and high in precision.

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. 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).

The application discloses a kind of three-dimensional magnetic field coil magnetic axis orthogonality measurement methods under geomagnetic field environment, belong to magnetometry technical field.The method does not need to construct zero magnetic environment, only utilizes scalar magnetometer and unipolar current source, through the measurement geomagnetic field scalar, single-axis different current under the synthetic magnetic field, the synthetic magnetic field of double-axis simultaneous energization, combine spatial vector mathematical model and equation set elimination method, eliminate the unknown angle interference of geomagnetic field and coil magnetic field, sequentially solve single-axis magnetic field intensity, three-axis magnetic axis angle, finally obtain magnetic axis orthogonality.The application measurement equipment is less, easy to operate, time-consuming is short, uncertainty is small, measurement precision is high, can be widely applied in magnetometry, aerospace, biological medical fields such as three-dimensional magnetic field coil orthogonality verification, calibration and test.

The invention relates to the technical field of optical atomic clocks, and discloses a multi-mode magnetic field generation and regulation device and method for a strontium atom optical clock, and the device comprises a three-dimensional magnetic field coil, a magnetic field control system, and a magneto-optical trap. The three-dimensional magnetic field coil comprises an X-direction magnetic field coil, a Y-direction magnetic field coil and a Z-direction magnetic field coil; the X-direction magnetic field coil, the Y-direction magnetic field coil and the Z-direction magnetic field coil are mutually orthogonal and are respectively arranged along opposite positions to form a cubic framework, and the magneto-optical trap is positioned in the cubic framework; the magnetic field control system is electrically connected with the X-direction magnetic field coil, the Y-direction magnetic field coil and the Z-direction magnetic field coil. The technical problems that an existing strontium atom optical clock system is complex in structure and high in power consumption and thermal load, and time sequence characteristics used by a magnetic field in the operation process of the optical clock are not fully utilized are solved.

This invention discloses a method, system, equipment, and storage medium for scale removal in a water purification device. The water purification device includes a nanofiltration unit with a magnetic field coil externally mounted on the nanofiltration unit. The scale removal method includes: obtaining target and actual parameter values ​​of the water purification device; if the actual parameter value is less than the target parameter value, reciprocatingly energizing the magnetic field coil in both forward and reverse directions to detach the scale from the nanofiltration unit; and controlling the operating state of the water purification device to discharge the scale. This invention, by winding a magnetic field coil around the outside of the nanofiltration unit, and upon detecting scale in the nanofiltration unit, reciprocatingly energizing the magnetic field coil in both directions to detach the scale, and then controlling the operating state of the water purification device to discharge the scale, can remove scale promptly and effectively, improving scale removal efficiency and effectiveness.

A stellarator with a non-planar magnetic field coil with a first plate as well as a method of winding a non-planar magnetic field coil for a stellarator is presented. The first plate (100) comprises a first surface (110) with a non-planar geometry and a first recess (120). The first recess (120) extends along a first path (130) along the first surface (110). The first recess (120) has a first cross-section (140).

An optically pumped magnetic sensor (1) comprises: a pump light source (60) that emits pump light (61); a detector (30) that outputs the result of detecting the pump light (61) emitted from the pump light source (60); two glass cells (11, 12) that are arranged so as to be aligned on the same path of the pump light from the pump light source (60) to the detector (30) and that each include gaseous atoms that are excited by the pump light; a magnetic field coil (21) that applies a first alternating-current magnetic field to one glass cell (11); a magnetic field coil (22) that applies a second alternating-current magnetic field with a phase inverted from that of the first alternating-current magnetic field to the other glass cell (12); and an output device (40) that outputs a value obtained by differentiating the output of the detector (30).

The utility model discloses an electromagnetic heating assembly for an electromagnetic heating cooking utensil and the electromagnetic heating cooking utensil. The electromagnetic heating assembly has a central axis including at least two coils and at least one connection cable. The coils are formed by winding enameled wires and used for generating an alternating magnetic field when powered on, the winding centers of the coils deviate from the central axis of the electromagnetic heating assembly so that all the coils can be distributed in the circumferential direction of the central axis, and all the coils can rotate around the central axis of the electromagnetic heating assembly as a whole. Wherein the connecting cable at least comprises a coil connecting section, a power panel connecting section and a movable section between the coil connecting section and the power panel connecting section. The coil connection section is connected with the enameled wire, and the power board connection section is connected to a power board.

The application discloses a kind of superconducting strip copper plating method and continuous thickness measuring equipment.The method comprises the following steps: S1, initial electrochemical copper plating is carried out on the strip to be processed;S2, high-precision continuous thickness measuring equipment is used to test the thickness of the coating in the length and width direction of the strip;S3, the thickness distribution data obtained by testing is used to dynamically control the subsequent electroplating process parameters;S4, the steps of copper plating and testing-control are repeated until the cumulative coating reaches the target thickness.The application combines copper plating process with testing, feedback control, breaks through the bottleneck of copper plating uniformity control caused by long production line dynamic deformation, realizes accurate control of the uniformity of the copper plating layer of superconducting strip, and is especially suitable for high-magnetic-field coil applications with extremely high coating uniformity requirements, effectively improving the winding quality and stability of electromagnetic performance.

The invention provides a hybrid damping torsional pendulum magnet, which is applied to the technical field of accelerator insert equipment and comprises a pole head, a permanent magnet and a magnet exciting coil. The multiple pole heads extend in the first direction and are arranged in two parallel rows, a magnetic gap exists between each row of pole heads and the other row of pole heads in the second direction, the cross section area of the root of one end, close to the magnetic gap, of each pole head is smaller than that of the root of the other end of each pole head, and each pole head and the other pole head with the magnetic gap have opposite polarity. The polarization direction of each row of pole heads is alternately changed along the first direction; each pair of permanent magnets is arranged in a concave space at the end part of one end, close to the magnetic gap, of each pole head, and comprises a first permanent magnet and a second permanent magnet which have opposite polarization directions; and the magnet exciting coil is wound on each pole head and wraps the permanent magnet.

The invention relates to the field of semiconductor equipment, in particular to a method for improving oxygen content uniformity in a pulling process and a pulling single crystal furnace. The invention provides a method for improving oxygen content uniformity in a pulling process, which comprises the following steps of: establishing a three-dimensional electromagnetic field model of a main magnet system formed by two main coils, and simulating the distribution condition of an electromagnetic field in a melt area; the configuration of the two main coils is optimized; the space relative position of the two main coils is optimized; and electrical parameters and windings of the two main coils are optimized. According to the technical scheme, the geometric configuration and the spatial arrangement of the main magnetic field coil are systematically optimized, and the distribution uniformity of the magnetic field in the plane of the target area, especially the melt area, is improved, so that the radial uniformity of the oxygen content of the crystal is effectively improved.

The invention provides a single light source atom magnetometer with a low measurement dead zone and a magnetic field measurement method. The single light source atom magnetometer comprises a laser, an optical fiber splitter, a first collimator, a second collimator, an alkali metal atom gas chamber, an excitation magnetic field coil, a signal processor, a first photoelectric detector and a second photoelectric detector, according to the single-light-source atom magnetometer, the same light source is divided into two beams to detect the atom gas chamber at different angles, detection signals are obtained, the detection range of the atom magnetometer reaches 360 degrees, and the detection dead zone of the atom magnetometer is greatly reduced. By applying the technical scheme of the invention, the technical problem that the sensitivity is reduced or the measurement is failed when a magnetic field in a certain direction is measured due to the inherent measurement dead zone in the operation process of the traditional magnetometer is solved.