31results about How to "Solve the problem of flux leakage" patented technology

The invention discloses a quenching inductor for shaft parts and a quenching method, which are designed for solving the problem of poor quenching effect of shaft necks of existing shaft parts. The quenching inductor for the shaft parts is a ring-shaped body, wherein the inner surface of the quenching inductor is a conical surface, and the bottom surface of the quenching inductor is an inclined surface. A self-cooling water channel and a quenching liquid channel of the inductor are formed in a cavity. Magnet conduction layers are formed on the outer surface, the inner surface, the top surface and the bottom surface of the quenching inductor. A quenching system for the shaft parts comprises the shaft parts and the quenching inductor for the shaft parts. According to the quenching method, an included angle is formed between the inner surface and the cylindrical surface of the inductor, and an included angle is formed between the bottom surface and the lower end face of the inductor. The quenching inductor and system for the shaft parts are reasonable in structure, convenient to use and low in manufacture cost, and are suitable for the shaft parts including hollow shaft parts and thin-walled tubes. The quenching method is simple in procedure and has low requirements on hardware such as a device.

The invention discloses a bilateral magnetic flux switching permanent magnet linear motor. The linear motor comprises bilateral secondary stators and a primary rotor arranged between the stators, theprimary rotor comprises six primary rotor units, connecting bridges exist between the primary rotor units, each primary rotor unit comprises two H-shaped magnetic conductive iron cores, and a permanent magnet is arranged between the two H-shaped magnetic conductive iron cores; a plurality of secondary teeth are formed on the secondary stators at intervals, secondary grooves are formed between thesecondary teeth, yoke parts are formed at the bottoms of the secondary grooves, magnetic conductive teeth are formed on the H-shaped magnetic conductive iron core opposite to the secondary teeth, andwinding mounting grooves are formed between the magnetic conductive teeth on the same side; the bilateral secondary stators are used as fixed parts, the primary rotor is used as a moving part, and theprimary rotor does linear motion in the middle of the bilateral secondary stators to form a motor with a bilateral flat plate structure. The linear motor has the advantages of the high utilization rate, the low magnetic flux leakage and the like.

The invention discloses a normal form multi-coil magnetic gathering type wireless charging device for electric automobiles. The wireless charging device comprises an inverter, a ground system induction coil, an automobile chassis secondary coil, vehicular battery equipment, a magnetism detection sensor and a parking target tracking device. The wireless charging device is characterized in that the ground system induction coil controls the parking target tracking device according to the magnetism detection sensor to adjust a parking position in order to realize coincidence of a line between a small coil and the automobile chassis secondary coil with the normal line, induction electromotive force is acquired close to a primary winding space through inductive coupling of high-frequency alternating flux, flux leakage is reduced, wireless transmission efficiency is improved, and electric energy is provided for a vehicular battery.

The invention discloses a motor rotor, a motor and an air conditioner. The motor rotor comprises a rotating shaft sleeve ring, a plurality of iron cores that are disposed at the outer side of the rotating shaft sleeve ring and ordered in the annular manner. An inner opening and an installing groove are formed between two adjacent iron cores, wherein the installing groove is used for installing magnetic steel. A non-magnetically conductive connector is disposed between the rotating shaft sleeve ring and the plurality of the iron cores, in order to fixedly connect the rotating shaft sleeve ring with the plurality of the iron cores. The non-magnetically conductive connector is disposed between the rotating shaft sleeve ring and the plurality of the iron cores, and the magnetic steel disposed between adjacent iron cores are in abut connection with the non-magnetically conductive connector, so that the inner side of the magnetic steel is prevented from forming magnetic leakage through conduction of connection bridges at two sides of the magnetic steel, and then magnetic steel utilization of the motor rotor is facilitated.

The invention discloses a stator modular double-rotor doubly salient permanent magnet motor, which comprises an inner salient pole rotor, an outer salient pole rotor and a stator located between the inner salient pole rotor and the outer salient pole rotor, wherein independent air gaps are formed between the inner salient pole rotor and the stator and between the outer salient pole rotor and the stator respectively; the stator comprises a plurality of stator modules, each stator module comprises a stator yoke part, outer stator teeth and inner stator teeth, the outer stator teeth and the innerstator teeth are connected with the outer side and the inner side of the middle position of the stator yoke part respectively, and the stator yoke parts of the stator modules are connected through permanent magnets to form a complete stator; armature windings are wound on the outer stator teeth and the inner stator teeth of each stator module; and positive and negative alternating counter electromotive forces are induced in armature windings of the inner and outer stators of the motor along with synchronous rotation of the inner and outer rotors and change of relative positions of the stators. The problem of serious stator side flux leakage of the traditional single-rotor doubly salient permanent magnet motor is solved, and the permanent magnet utilization rate and the motor torque density are improved.

The invention discloses a segmented iron core IPM plastic package forming rotor, and relates to the field of motors. An existing IPM rotor is designed into an integral punch forming rotor iron core ofa magnetism isolating bridge structure, and greater leakage flux exists. The segmented iron core IPM plastic package forming rotor comprises a rotor iron core, magnetic shoes, a PBT and a shaft, wherein the rotor iron core consists of a plurality of same iron core segments in an encircling manner; a magnetic shoe groove and an anti-leakage flux groove for reducing leakage flux are arranged between every two adjacent iron core segments respectively; every two adjacent iron core segments are separated from each other through the corresponding anti-leakage flux groove and the corresponding magnetic shoe groove; each iron core segment is provided with a positioning structure for realizing the positioning of the corresponding iron core segment respectively; each magnetic shoe is inserted intothe corresponding magnetic shoe groove; the magnetic shoes are fixed on the rotor iron core through the PBT; and the shaft is connected with the magnetic shoes and the rotor iron core into a whole body through the PBT. Through the technical scheme, the rotor iron core is segmented into the same iron core segments, so that the magnetism isolating bridge leakage flux problem of a traditional integral rotor iron core is solved, the utilization rate of the rotor magnetic shoes is improved, and the power density of the motor is improved.

The invention provides a single-stage coil cable tension sensor based on a self-inductance principle and a test method thereof, and belongs to the technical field of structural health monitoring. The single-stage coil cable tension sensor comprises a magnetic conductive steel cable test piece, a single-stage coil cable tension sensor for cable tension measurement, a coil skeleton for winding the sensor, a loading device, a test piece fixing and clamping device, a generation circuit for generating a self-inductance coil sensor excitation signal, an amplification circuit, a filtering circuit, an effective value circuit and a digital analog conversion circuit and other circuits for analyzing and processing each signal. The steel cable test piece magnetic permeability variance is used as the intermediate quantity, and a linear relation between the cable tension value and the self-inductance variance is established so that the cable tension value can be measured. The single-stage coil cable tension sensor based on a self-inductance principle and the test method thereof can solve the problems that a traditional magnetic flux cable tension sensor has more coils and is large in volume, and is low in anti-interference capability, and have the advantages of being simple in manufacturing process, being small in volume, and being able to improve the signal to noise ratio of the sensor.

The invention provides a rotor assembly, a permanent magnet motor and a compressor, and the rotor assembly comprises a rotor iron core which comprises a through hole; the permanent magnet is arranged in the through hole, the permanent magnet is cut out through a surface perpendicular to the axis of the rotor iron core to obtain a first section, the included angle between the extension direction of the permanent magnet and the radial direction of the rotor iron core is larger than 0 degree and smaller than 90 degrees on the first section, the permanent magnet comprises a non-diffusion part, and the non-diffusion part comprises a first end and a second end in the extension direction, the first end is close to the circumferential side of the rotor core, and the second end is close to the axis of the rotor core; the first diffusion part is connected with the first end of the non-diffusion part; the first magnetic isolation bridge is connected with the first diffusion part and is positioned between the first diffusion part and the circumferential side surface of the rotor iron core; wherein the mass ratio of the heavy metal elements in the first diffusion part is greater than the mass ratio of the heavy metal elements in the non-diffusion part. According to the invention, the technical problems that the anti-demagnetization capability of the permanent magnet motor is weak and irreversible demagnetization is easy to occur are solved.

The invention provides a double-stator rotor-yoke-free oriented silicon steel sheet permanent magnet linear motor. The permanent magnet linear motor comprises U-shaped double stators, a rotor iron core and a rotor bearing plate. The U-shaped double stators have a U-shaped structure formed by two vertical plates and one transverse plate. Two rows of permanent magnets are installed on the internal walls of the two side vertical plates of the U-shaped structure. A guide rail is installed on the top part of each side vertical plate. The double-stator double-air-gap structure is used, and the rotoruses the iron core structure so that the air gap magnetic co-nergy can be enhanced and the thrust density of the motor can be effectively increased. Besides, the anisotropic magnetic performance of the oriented silicon steel sheets and the magnetic circuit characteristics of the motor are combined, and the magnetic line direction of the rotor teeth and the high magnetic performance direction of the rolling direction of the oriented silicon steel sheets are consistent; and the characteristic of great magnetic performance of the rolling direction of the oriented silicon steel sheets is utilized, the saturation working point can be enhanced and the magnetomotive force produced by the stator current can be increased so that the stator tooth magnetic flux density and the air gap magnetic fluxdensity can be enhanced and the objective of enhancing the thrust density under the unit volume of the linear motor can be achieved.

The invention relates to an underground cable comprehensive detection system which is technically characterized by comprising a high-power signal emission device, a loading coil, a signal receiving device and a display recording device, wherein an output end of the high-power signal emission device is connected with the loading coil, the loading coil is installed on a cable to be detected in a sleeved mode and produces radio-frequency signals under control of the high-power signal emission device, voltage displaying is carried out and voltage is outputted to the display recorder device after the signal receiving device receives the radio-frequency signals, and the display recording device carries out calculation on the received voltage and then outputs detection results. According to the underground cable comprehensive detection system, design is reasonable, the direct digital frequency synthesis technology is utilized, the high-power radio-frequency power emission technology is combined, control precision of frequency is higher, the frequency is more stable, meanwhile double receiving antennas are utilized to be matched with a receiving circuit, display is carried out on the display recording device, detecting difficulty is reduced, accuracy of detection is improved, and labor intensity of detecting staff is lightened.

The invention discloses a magneto-rheological damper with double annular damping gaps. The damper is characterized in that an inner cylinder barrel is arranged inside an outer cylinder barrel, and theinner cylinder barrel sequentially comprises an inner cylinder barrel upper section, an inner cylinder barrel middle section and an inner cylinder barrel lower section from top to bottom; the outer cylinder barrel, the inner cylinder barrel upper section and the inner cylinder barrel lower section are made of high-magnetic-conductive materials, and the inner cylinder barrel middle section is madeof a non-magnetic-conductive material; cylinder barrel upper covers are arranged at the upper ends of the outer cylinder barrel and the inner cylinder barrel, cylinder barrel lower covers are arranged at the lower ends, a piston rod is arranged inside the inner cylinder barrel, one end of the piston rod extends out of the cylinder barrel upper cover, and the other end of the piston rod penetratesthrough a low-carbon steel disc; a piston head is arranged on the piston rod, a damping generator is arranged between the piston head and the low-carbon steel disc, and the upper end and the lower end of the damping generator are each provided with a non-magnetic-conductive material used for isolating a magnetic field; and a high-magnetic-conductivity material and a non-magnetic-conductivity material for changing magnetic field distribution are arranged in the middle of the damping generator. According to the damper, the magnetic field utilization rate is improved, and the damping force rangeand the dynamic range are remarkably improved.

The invention discloses a planar transformer, and relates to the field of electrical elements. The planar transformer comprises a first PCB, a second PCB and a planar magnetic core, wherein the first PCB and the second PCB are stacked, and the planar magnetic core is used for fixing the first PCB and the second PCB. The first PCB and the second PCB respectively comprise a plurality of circuit layers, each circuit layer is provided with a winding, the winding is a primary winding or a secondary winding, in all the circuit layers, the circuit layers provided with the primary windings and the circuit layers provided with the secondary windings are alternately arranged, and the circuit layers provided with the primary windings and the circuit layers provided with the secondary windings are alternately arranged. And the windings of all the circuit layers are combined in series and in parallel to form a primary coil and a secondary coil of the planar transformer. The PCB planar transformer at least can solve the problem that a current PCB planar transformer is prone to a magnetic leakage phenomenon.

The invention discloses a rotor punching sheet group, a rotor iron core, a rotor and a motor. The rotor punching sheet group comprises a first rotor punching sheet and a second rotor punching sheet, a plurality of permanent magnet grooves are formed in the first rotor punching sheet and the second rotor punching sheet, and the permanent magnet grooves extend along the radial direction of the rotor punching sheets and are distributed on the rotor punching sheets in a central symmetry manner; an outer diameter magnetic isolation notch is formed between the outer end of the permanent magnet groove on the first rotor punching sheet and the outer diameter of the first rotor punching sheet; and an inner diameter magnetic isolation notch is formed between the inner end of the permanent magnet groove on the second rotor punching sheet and the inner diameter of the second rotor punching sheet. The rotor iron core is formed by laminating a plurality of the first rotor punching sheets and the second rotor punching sheets. The rotor comprises the rotor iron core and a permanent magnet, and the permanent magnet is arranged in the rotor iron core. The motor comprises the rotor. Two rotor punching sheets are laminated, so that the problem of magnetic leakage of rotor magnetic steel is effectively solved on the basis of ensuring the mechanical strength of the rotor, the magnetic leakage amount is reduced, and the use amount of the magnetic steel is saved.

The invention provides a novel inductor magnetic core. The novel inductor magnetic core comprises a first magnetic core, a second magnetic core and a columnar magnetic core, wherein the columnar magnetic core is connected between the first magnetic core and the second magnetic core, the first magnetic core, the second magnetic core and the columnar magnetic core are connected integratedly, at connection positions of the first magnetic core, the second magnetic core and the columnar magnetic core, the first magnetic core and the second magnetic core are provided with positioning holes, an end part of the columnar magnetic core is embedded into the positioning holes, gaps are arranged in the connection positions, and the hardness of an inductor is conveniently changed. The high-frequency inductor magnetic core integrates the advantages of space utilization rate and simple winding of a traditional combination inductor, the problems of magnetic leakage and difficulty in assembly and positioning also can be solved, meanwhile, the gaps are also convenient to adjust, and the hardness of the inductor is adjusted by adjusting the gaps.

The present invention relates to a magnetic microsphere with functional groups on the surface and its preparation method and application. The method comprises surface modification of polymer microspheres to obtain modified microspheres, and preparation of magnetic microspheres with functional groups on the surface. The magnetic nanoparticles are dispersed and mixed in the solvent, and the pH of the solution is adjusted so that the surface of the modified microsphere and the magnetic nanoparticle are oppositely charged, and the magnetic nanoparticle is adsorbed on the surface of the modified microsphere to form a composite microsphere, and then composite The microsphere is the nucleus. In the presence of the surfactant, the functional monomer forms a polymer layer with functional groups on the surface of the composite microsphere to obtain the magnetic microsphere. The method of the present invention effectively solves the problem of traditional magnetic microspheres. Due to the problems of magnetic flux leakage and uneven surface hydrophilicity and hydrophobicity in the preparation process, the obtained magnetic microspheres have uniform particle size, high magnetic content and good consistency, and rich surface functional groups.