205results about How to "Increase the number of turns" patented technology

A process for preparing the single-mode optical fibre with low polarization mode dispension features that a kneading system installed at downstream of drawing tower has a kneading wheel whose axis is periodically swinging in the plane parallel to drawing direction, and when the keading wheel is driven by high-speed moving optical fibre to show an angle, the generated torsion is transmitted to the softened glass body at upstream to generate the plastic deformation and solidify it in optical fibre, resulting in disordered non-sine torsion distribution to lower the polarization mode dispersion.

The embodiment of the invention provides a three-phase motor stator and an electric vehicle drive motor, belonging to the field of new energy vehicle motors. The three-phase motor stator comprise a stator iron core, A plurality of stator slots are formed in the stator core, wherein the stator windings are arranged in the plurality of stator slots in six layers, the number of slots per pole per phase is 3, and each phase stator coil in the three-phase stator coil is divided into three groups, and each group of stator coils occupies two adjacent stator slots side by side, wherein one stator slotis displaced between two adjacent groups of stator coils. As a result, the harmonics of the motor are effectively reduced, the AC copper consumption caused by skin effect and proximity effect is reduced, the voltage and current of the high-voltage system are matched, and the purposes of high torque, low torque ripple, low vibration noise, good heat dissipation performance and high electrical reliability are achieved.

The invention discloses a near field communication (NFC) antenna and terminal equipment. The NFC antenna comprises a substrate, a first coil and a second coil, wherein the first coil is arranged on the front surface of the substrate, the second coil is arranged on the back surface of the substrate, a feed end which is used for connecting with an antenna matching circuit is led out from one end of the first coil, the other end of the first coil is connected with one end of the second coil, and a feed end which is used for connecting with the antenna matching circuit is led out from the other end of the second coil which is not connected with the first coil. The NFC antenna and the terminal equipment have the advantages that the area of the NFC antenna can be effectively utilized; and on the premise that the total area (outer contour) of the NFC antenna is unchanged, the total antenna width is reduced, the coil turns and the effective area of the antenna are increased at the same time, the induced magnetic field intensity is enhanced, the induced electromotive force is improved and the antenna performance is improved.

The invention relates to a double-layer coil for electromagnetic formation and a manufacturing method of the double-layer coil. The double-layer coil comprises a casing; a circular groove where coils are arranged is formed in the front side of the casing; an upper layer coil body and a lower layer coil body are sequentially arranged in the groove from top to bottom; two rectangular through holes are respectively formed in two sides, close to the edge of the casing, in the groove; a step blind hole where a middle connector is arranged is formed in the middle of the groove; the middle connector is matched with the step blind hole; rectangular first blind holes are symmetrically formed in the two sides of the step blind hole; second blind holes corresponding to the first blind holes are formed in the back side of the casing; the first blind holes are communicated with the second blind holes; the beginning end of the upper layer coil body and the beginning end of the lower layer coil body are connected with the middle connector; the output end of the upper layer coil body and the output end of the lower layer coil body penetrate through the through holes and then are respectively connected with a power line in the second blind holes electrically. The double-layer coil has the advantage that the insulation and the mechanical strength of the coil are improved.

The invention relates to a roadway-hole transient electromagnetic device and a measuring method. The roadway-hole transient electromagnetic device comprises a transmitting device and a receiving device, wherein the transmitting device and the receiving device are connected with a host, a drilled hole and a roadway serve as a whole, when measurement is carried out, the transmitting device and the receiving device are arranged in the roadway and the drilled hole respectively, the host controls the transmitting device and the receiving device to be in time synchronization, and measurement is carried out on an abnormal body through a transient electromagnetic method. When measurement is carried out through the roadway-hole transient electromagnetic device, the roadway-hole transient electromagnetic device is closer to the abnormal body, influence caused by an artificial conductor on the roadway-hole transient electromagnetic device is low, and the signal to noise ratio is high; due to the fact that a transmitting coil is arranged in the roadway, compared with the narrow space of the drilled hole, the parameters such as the number of turns of the transmitting coil and the side length of the transmitting coil can be increased, the transmission magnetic moment can be increased, and the coefficient of mutual induction is almost zero; influence of the volume effect of roadway transient electromagnetic non-contact detection is effectively reduced; due to the fact that the design that a receiving coil with a plurality of components is adopted, the combination forms of the receiving coil can be multiple, and when the PCB receiving coil form is adopted, the effective receiving area can be effectively increased, the radius of detection can be increased, information of geologic bodies, within a certain range, around the drilled hole can be effectively obtained, and precision of judgment of the abnormal body is improved.

The invention discloses a Rogowski coil sensing head suitable for a Rogowski coil current sensor. The Rogowski coil sensing head is characterized in that a mounting mode that six axial loop coils and one rewinding coil are arranged on the same PCB (printed circuit board) base, and the rewinding coil is serially connected with the six axial loop coils is adopted, so larger turns per coil can be obtained in a limited area, the induced electromotive force is obviously increased, and the antijamming capability is increased. The space distribution of the six axial ring coils is a distribution taking a Rogowski coil central hole as a circle center.

There is provided a power supply for an electrical device operable in active mode and in standby mode. The power supply comprises a transformer having a primary winding on the primary side and a secondary winding on the secondary side. The primary winding is connectable to an AC voltage supply and is arranged to comprise N turns when the electrical device is in active mode and more than N turns when the electrical device is in standby mode. Circuitry on the secondary side is arranged to provide an output voltage for the electrical device during active mode.

The invention discloses a method for detecting semiwave direct current, which overcomes the defects of the conventional direct current detection method and has the advantages of simplicity, convenience, practicability and the like. The method comprises that: 1) when a power distribution system has a singlephase earth fault, the neutral voltage of a grounding transformer is set to be sinusoidal signals with the power frequency of 50Hz; 2) a direct current generator is subjected to siliconstack half wave rectification to generate direct current, the direct current is semiwave direct current which is also called pulsating direct current and is injected to the fault power distribution system, and direct current signals are wire selecting and positioning judgment signals to be detected; and 3) according to the electromagnetic field principle, the semiwave direct current generates a magnetic field, so the semiwave direct current can be detected by detecting the magnetic field generated by the semiwave direct current.

The invention provides a method for manufacturing a hardcover. The method mainly comprises the three steps of bookblock processing, book case manufacturing and assembling. The step of bookblock processing includes the procedures of paper printing, printed product detection, folding, pagination, locking with lines, bundling, gluing, bonding of front lining paper and back lining paper, and the like. The step of book case manufacturing includes the procedures of face paper printing, grey board cutting, face paper technological treatment, bonding of face paper on a grey board, siding, flattening and the like. The step of assembling includes the procedures of book case gluing, book back gluing, casing of a bookblock, flattening, turning, book groove pressing, quality inspection, and encasement. The method not only keeps the characteristic that the cover of an existing hardcover is manufactured exquisitely, but also improves the three sides except for the book back of a book through a gold stamping mode. The delicacy and grade of the hardcover are remarkably improved, the turning resistance frequency is improved, and the hardcover is easy to store.

A wire rope flaw detector comprises a back yoke (3) and excitation permanent magnets (4a, 4b), which form a main magnetic path in a predetermined section of a wire rope (1) in the axial direction; a magnetic path member (7) arranged in the predetermined section to be magnetically insulated from the back yoke (3) and the permanent magnets (4a, 4b) and making the leakage flux generated from a damaged part (10) of wire rope detour to the outside of the wire rope (1); and a detection coil (8) wound around the magnetic path member (7) for detecting leakage flux. The amount of leakage flux can be increased by providing the magnetic path member (7) and since the windable area of the detection coil (8) is increased, the number of turns of detection coil can be increased.

The invention discloses a driving mechanism for a reactor control rod of a nuclear power plant. The driving mechanism for the reactor control rod of the nuclear power plant comprises a pressure-resistant shell assembly, a falcula assembly, a driving rod assembly, a coil assembly and a rod position detector assembly, wherein the pressure-resistant shell assembly is an integrated shell, the top of the pressure-resistant shell assembly is of a blind pipe structure, and the bottom of the pressure-resistant shell assembly is connected by virtue of a screw thread and is detachably arranged on a CRDMpipe socket of a pressure vessel head in a sealing manner. Compared with the prior art, the driving mechanism for the reactor control rod of the nuclear power plant adopts the integrated pressure-resistant shell assembly, no weld joint is formed on the pressure-resistant shell assembly, and the pressure-resistant shell assembly and the CRDM pipe socket are connected by adopting the screw thread and are sealed by virtue of a pair of sealing rings, so that the risk of reactor coolant leakage can be effectively reduced. Besides, the falcula assembly adopts a double-tooth falcula structure, the wear resistance of a falcula can be greatly improved, the service life of a control rod driving mechanism is prolonged, the falcula assembly is assembled and disassembled from the bottom of the pressure-resistant shell assembly, and irradiation injury risk produced to operating personnel can be reduced.

The invention relates to a self-generating wireless mouse and a mouse pad. One or more magnets are arranged in the mouse pad; the magnets on the same horizontal line are identical in the NS pole direction; the magnets on two adjacent horizontal lines are opposite in the NS pole direction; a rectifier module, an electric energy storage module, an electromagnetic induction module and a voltage stabilizing diode are arranged on a circuit board in the wireless mouse; the positive output end and the negative output end of the rectifier module are respectively connected with the positive end and the negative end of the electric energy storage module; the output end of the electromagnetic induction module is connected with two ends of the rectifier module and the electric energy storage module after serially connecting the rectifier module and the electric energy storage module; and the positive connection end and the negative connection end of the voltage stabilizing diode are respectively connected with the positive end and the negative end of the electric energy storage module. The self-generating wireless mouse provided by the invention has the advantages of high charging efficiency, high self-generating voltage, and long service life of the power supply by adopting the non-contact power generation method and a novel rectifying and charging circuit, and can supply power by itself during normal movement of the mouse.

The invention relates to a switched reluctance motor with a stator partitioned two-phase 6/5 structure. The switched reluctance motor comprises a stator, a rotor, a winding and a motor shaft, wherein the rotor center is integrated with the motor shaft. The switched reluctance motor is characterized in that two E-shaped stators with three poles are provided, the two stators are symmetrical distributed on the periphery of the rotor and the arc center of the stators of overlaps with the center of the rotor, and the rotor is of an uneven salient pole structure with five poles. The outer diameters of the rotor poles are different, and the winding is wound on a stator yoke. The structure is simple, the design is reasonable, and installation and implement are easy. The switched reluctance motor is reliable to use, the torque ripple is reduced, and the areas with zero torque are eliminated, so that the switched reluctance motor can start automatically. The output torque of the motor is increased, the loss is reduced, and the output efficiency is increased.

A viscous clutch (30; 30') includes a stationary journal bracket (32; 32') defining a mounting shaft (32-1; 32-1'), an output member (34; 34') rotatably supported on the mounting shaft about an axis (A), an input member (34; 34') rotatably supported on the mounting shaft about the axis, and a working chamber (50; 50') defined between the input member and the output member to selectively transmit torque there between when a shear fluid is present. The mounting shaft extends axially through the viscous clutch from a front face (62; 62') of the viscous clutch to a rear face (56; 56') of the viscous clutch, with the rear face defining a mounting surface for mounting the viscous clutch at a mounting location. The front and rear faces are located at opposite sides of the viscous clutch and face in opposite directions.

An integrated gas-enhanced electrosurgical generator. The generator comprises a high frequency power module, a low frequency power module and a gas module. The high frequency power module adapted to generate an electrical energy having a band of frequencies centered around a first frequency, wherein the electrical energy has a first power as the first frequency and a second power lower than the first power at a second frequency lower than the first frequency. The low frequency power module having an input connected to an output of the high frequency module. The low frequency module comprises a resonant transformer comprising a ferrite core, a primary coil and a secondary coil, the secondary coil having a larger number of turns than the primary coil, wherein the resonant transformer has a resonant frequency equal to the second frequency. The gas module is adapted to control a flow of an inert gas.

The invention belongs to the field of doubly salient permanent magnet synchronous motors and discloses a doubly salient permanent magnet synchronous motor with unequally spaced stator poles. The doubly salient permanent magnet synchronous motor comprises a stator, a rotor, a permanent magnet, an armature winding and a rotating shaft, wherein the rotor is arranged in the stator and rotates relative to the stator; the rotating shaft is arranged in the rotor and rotates along with the rotor; the permanent magnet is symmetrically arranged at a yoke part of the stator and provides excitation for the air-gap field of the motor; the armature winding is coiled on the stator poles of the stator, and after the armature winding is energized, the magnetic field of the armature winding interacts with the magnetic field of the permanent magnet to rotate the rotor. Through the doubly salient permanent magnet synchronous motor, a problem that the motor cannot be started in a bidirectional way in the prior art is solved, and the stator poles are unequally spaced, so that the output torque is improved, and furthermore, through superposition on a multi-module structure, the output torque can be superposed, so that the toque pulsation is reduced, and the fault tolerance and the reliability are improved.

The invention discloses a roll pass optimizing method capable prolonging shaped roll service life. The method is characterized by including the steps of firstly, building a mathematic model to calculate the rolling state of a rolled piece under a target rolling process; secondly, predicting roll abrasion condition under current production process conditions, evaluating roll abrasion state, and converting roll abrasion quantity into roll repairing quantity; thirdly, optimizing roll passes and the rolling process by evaluating roll cutting quantity. By the method, roll abrasion state is effectively changed during profile rolling, roll uneven abrasion is reduced, cutting nonuniformity during roll repairing is improved, turning quantity required by each roll pass recovery is reduced by 3-10mm, roll turning times are increased by 1-2, and the service life of shaped rolls is prolonged.

The invention discloses an efficient spiral fin heat exchange device. The efficient spiral fin heat exchange device comprises a sealed shell, a spiral fin heat exchanger which is axially vertical to an air inlet, and an air outlet formed in the side, opposite to the air inlet, of the shell, wherein the air inlet connected with a boiler smoke pipeline is formed in one side of the shell; the spiral fin heat exchanger comprises a water inlet tank and a water outlet tank which are respectively connected with a water inlet pipe and a water outlet pipe; a plurality of spiral fin heat exchange tubes are arranged between the water inlet tank and the water outlet tank; the two ends of the spiral fin heat exchange tubes are respectively connected with the water inlet tank and the water outlet tank through roller bearings; the length of the spiral fin heat exchange tubes is larger than the width of the air inlet; the spiral fin heat exchange tubes comprise dynamic heat exchange tube sections opposite to the air inlet and exhaust heat exchange tube sections positioned on one side of the air inlet; and the air outlet is opposite to the exhaust heat exchange tube sections. According to the efficient spiral fin heat exchange device, the spiral fin heat exchanger can ensure that spiral fins are in full contact with boiler smoke for heat exchange, flue gas is promoted to form a turbulent current, and the heat exchange area is relatively enlarged, so that the heat exchange efficiency is improved.

The invention relates to a processing method for interturn insulation of a high-voltage motor pole coil, belonging to the technical field of motors. The processing method for interturn insulation of the high-voltage motor pole coil is characterized by comprising the following technical processes: numbering and marking paired pole core and pole coil, and conducting procedures of dismantling, annealing, cleaning, forming, edgewise winding, turn connection, insulated blanking and pad interturn insulation to the pole coil, so as to realize interturn insulation of the pole coil, and lead the pole coil to be sheathed with the pole core according to a number. The method has the advantages of simple technology, good heat dissipation effect, stable electrical performance, high heat-resisting class, capability of avoiding turn-to-turn short circuit of the pole coil, reduction of manufacturing cost for machine set transformation, and reduction of raw material consumption and the like.

The invention provides a copper coil-based full-tensor magnetic field gradient measurement device. The copper coil-based full-tensor magnetic field gradient measurement device comprises a gradiometer main body, a supporting base and a signal connection interface, wherein the gradiometer main body is used for measuring full-tensor magnetic field and magnetic field gradient information of each point in a space, and the full-tensor magnetic field and magnetic field gradient information comprises a response gradient value corresponding to five independent components in a full-tensor matrix and three magnetic field vector values of a central point; the supporting base is used for horizontal regulation operation which is required to be carried out during measurement of the magnetic field gradient of the space; the signal connection interface is used for transmitting weak voltage signals corresponding to the magnetic field gradient and central magnetic field intensity. According to the copper coil-based full-tensor magnetic field gradient measurement device provided by the invention, the technical defect that a traditional magnetic field gradient measurement device just can be used for measuring gradient information in a single direction of a magnetic field is solved, and the space consistency and the information integrity of magnetic field component measurement are increased.

The invention provides a B-dot probe based on a PCB type magnetic induction coil, and a current spatial distribution measuring system. A magnetic induction coil of the B-dot probe is clockwise or anticlockwise wired in the same direction on the circuit board, so that the PCB type magnetic induction coil is formed. Substantial advantages are achieved when an array formed by the plurality of B-dot probes is used to measure the current spatial distribution uniformity. A metal shielding cover is arranged on the top end, is buckled with a metal support ring and is fastened through fastening screws. A narrow gap is further formed in the metal shielding cover. The direction of long edges of the narrow gap is perpendicular to the plane of the magnetic induction coil. The metal shielding cover inhibits strong electromagnetic and strong radiation interference and also enables a magnetic field to be introduced to the magnetic induction coil through the narrow gap.