26 results about "Magnetic path length" patented technology

The embodiment of the utility model discloses a heavy current coupling inductor which comprises a magnetic core and a coil, the coil comprises a first winding and a second winding, each of the first winding and the second winding comprises a body and a pin connected with the body, the magnetic core is provided with a containing cavity, the bodies are wound in the containing cavity in the circumferential direction, and the pins are wound in the containing cavity in the circumferential direction. The distance between the first winding and the second winding is shortened, magnetic leakage is reduced, the coupling coefficient is improved, the length of a magnetic circuit is shortened, under the same size condition and the same inductance value condition, the number of turns of the coil can be reduced, the DCR can be reduced, meanwhile, the copper consumption can be reduced, the cost can be reduced, the size of the inductor is the most compact, and the power density is higher.

The invention relates to a special-shaped magnetic core loss test method. The method comprises the following steps: determining an equivalent standard magnetic core based on the shape of a special-shaped magnetic core; calculating the effective sectional area, the effective magnetic path length and the effective volume of the special-shaped magnetic core based on the equivalent standard magnetic core; calculating a test working voltage required by the magnetic core loss test based on a test working frequency, a test working magnetic flux density, the effective sectional area and the number of effective coils; and performing the magnetic core loss test based on the number of the effective coils, the test working frequency, the test working voltage, the effective sectional area, the effective magnetic path length and the effective volume. Therefore, the loss test of the special-shaped magnetic core can be realized.

The invention discloses an auxiliary device and method for rapidly determining three parameters of soft magnetic composite powder, and belongs to the technical field of soft magnetic material performance testing. The invention provides a simple device and method based on a medical injector and an insulated copper wire, aiming at solving the problems that a traditional testing method depends on complex equipment, steps are tedious, the cost is high and the efficiency is low. By measuring the inductance and the resistance of the coil and combining calculation of the size of an inner cavity of the injector and the length of a magnetic circuit, the quality factor, the effective magnetic conductivity and the direct-current bias of the soft magnetic powder can be quickly and accurately calculated. The device is simple in structure, mainly comprises an injector, an insulated copper wire, soft magnetic powder and an insulated rubber tape or transparent adhesive tape, and is convenient to operate and low in cost. The method is especially suitable for rapid quality detection of a production field and preliminary performance evaluation of a laboratory, can significantly improve the test efficiency and reduce the test cost, and has the advantages of simplicity, rapidness, low cost and high applicability.

A special-shaped magnetic column structure of an electric reactor is characterized by comprising a first magnetic column set composed of two cylindrical magnetic columns and a second magnetic column set composed of two semi-arc-shaped magnetic columns, the first magnetic column set and the second magnetic column set are arranged in an orthogonal mode, the two cylindrical magnetic columns are arranged oppositely, and the two semi-arc-shaped magnetic columns are arranged oppositely. According to the utility model, the magnetic columns forming the magnetic core are designed into special-shaped structures, so that the winding space and the magnetic circuit length are effectively increased, and the load resistance of the product is effectively enhanced; the magnetic core outer column is changed from a square to a circle, and the circumference of the circle is shortest under the condition that the sectional areas of the magnetic cores are equal, so that the copper wire consumption can be reduced, and the product cost can be reduced.

The invention relates to the technical field of linear motors, and particularly discloses a short-magnetic-circuit low-magnetic-resistance efficient linear motor module which comprises a stator and a rotor moving relative to the stator, the stator comprises two groups of magnetic units, the rotor is located between the two groups of magnetic units, the magnetic units are arranged on an external guide rail, and the rotor is movably connected with the guide rail; each magnetic unit comprises a plurality of groups of magnet sheets which are arranged at equal intervals along the length direction of the stator, the rotor comprises a coil unit and a control system, the control system is electrically connected with the coil unit, the control system is used for providing current for the coil unit, and the electrified coil unit and the two groups of magnetic units attract each other through magnetic force. The coil unit comprises a support and a coil winding arranged on the support, the coil winding is inserted between the two magnetic units, and the support is in sliding fit with an external guide rail. According to the invention, the magnetic resistance is further reduced and the response speed of the motor is improved through the design that the coil windings are arranged on the straight surfaces of the magnet sheets, the magnetic circuit length is obviously shortened, and the magnetic resistance and magnetic leakage are reduced.

The high-frequency and high-voltage transformer comprises a U-shaped magnetic core and a primary winding wound on the periphery of the U-shaped magnetic core, the periphery of the U-shaped magnetic core is sequentially sleeved with an upper insulation sleeve shell part and a lower insulation sleeve shell part from top to bottom, and the primary winding is arranged in the upper insulation sleeve shell part and the lower insulation sleeve shell part. And a plurality of secondary winding mounting parts are arranged outside the upper insulating sleeve shell part and the lower insulating sleeve shell part in a sleeving and sliding manner. The invention relates to the technical field of high-frequency and high-voltage power supplies. According to the high-frequency and high-voltage transformer, the U-shaped magnetic core is adopted, the length of a magnetic circuit of the transformer is long, the leakage inductance of the transformer is reduced, high voltage is isolated through the upper insulation sleeve shell part, the lower insulation sleeve shell part and the secondary winding installation parts, the leakage inductance is further wound, and the whole device is more compact; and the distributed capacitance can be effectively reduced while the series combination of a plurality of secondary windings is facilitated.

The invention provides a quadrupole variable-angle magnetic measurement probe and a plane vector stress measurement method, and relates to the technical field of mechanical property detection. The quadrupole variable-angle magnetic measurement probe comprises a variable-angle probe excitation magnetic core, a variable-angle probe detection magnetic core and a variable-angle probe multi-layer coil, and a non-90-degree included angle is formed between the variable-angle probe excitation magnetic core and the variable-angle probe detection magnetic core. The method comprises the following steps: changing the ratio of magnetic circuit lengths in the directions of positive pressure sigma x and sigma y on the surface of a test piece through a variable-angle probe excitation magnetic core and a variable-angle probe detection magnetic core which form an included angle of non-90 degrees, changing coefficients of the positive pressure sigma x and sigma y, and performing vector stress measurement at a plane single point by using a first measurement method or a second measurement method, and obtaining vector stress values of the maximum principal stress sigma1 and the minimum principal stress sigma2 at a single point in the plane and a principal stress direction angle theta. According to the method, the plane stress state can be reflected more visually, and the problem that the absolute values of the maximum principal stress sigma 1 and the minimum principal stress sigma 2 at the plane single point cannot be obtained through an existing method is solved.

The application discloses a method, device and processor for determining magnetic property information of nanocrystalline strip. The method comprises the following steps: obtaining non-sinusoidal excitation data of the nanocrystalline strip; decomposing the non-sinusoidal excitation data into a plurality of sinusoidal harmonic data; determining a plurality of equivalent magnetic path lengths based on the plurality of sinusoidal harmonic data; and determining the magnetic property information of the nanocrystalline strip based on the plurality of equivalent magnetic path lengths, wherein the magnetic property information at least comprises magnetic property information and / or magnetostriction property information. The application solves the technical problem that the magnetic property of the nanocrystalline strip cannot be determined.

To provide a laminated coil component which is easily changed in design to have a different inductance value, and to provide a method of manufacturing the same.SOLUTION: In the multilayer coil component 1, the magnetic-path length L of the coil conductors 5 changes depending on the positions of the second wiring portions 6 and the first wiring portions 7 in the second direction D2, and the inductance value changes accordingly. At this time, since the wide pillar portion 8 is included in the plurality of pairs of pillar portions 8, the positions of the second wire portion 6 and the first wire portion 7 with respect to the D2 portion in the second direction can be changed in the range connected to the wide pillar portion 8 without changing the design of the plurality of pairs of pillar portions 8. Therefore, in the multilayer coil component 1, it is easy to change the design to make the inductance value different.SELECTED DRAWING: Figure 10

The utility model provides a snail-shaped non-intrusive current sensor which is an open current clamp and adopts a non-intrusive structure, an iron core is in a state that the front part is narrow and the rear part is wide, the narrow part at the front end is used for operation in a narrow space, and alternating current is collected in the narrow space through a sharp-mouth open gauge outfit; the wide position of the rear end is used for increasing the effective magnetic circuit length of the whole iron core, the main iron core for excitation is placed at the non-opening position, it is ensured that the magnetic circuit length of the iron core at the current signal acquisition position is small, the loop of the iron core is long during working, and the measurement accuracy of the non-intrusive current sensor is improved. And the function of high-precision measurement of an alternating current signal in a narrow space is realized. The iron cores are made of ultracrystalline materials, and the two semicircular iron cores are fixed through the bayonets, so that the operation during field use is facilitated. The device can be used for measuring the sampling current of an electric energy meter in a master control room of a transformer substation, and can also be used for measuring alternating current signals in other narrow spaces.

This invention provides a method for detecting and calculating the austenite content in steel based on a permeability meter, relating to the fields of steel and electromagnetics. Based on the theoretical differences in saturation magnetization of different phases in ferromagnetic materials, this invention establishes a theoretical calculation model and detection method for measuring austenite content using a permeability meter. A standard-prepared sample is placed in a magnetic pole shoe, and the magnetic field strength H corresponding to the maximum permeability of the ferromagnetic material is first measured. μ Then at ≥1.5H μ Under a magnetic field strength of J, the polarization intensity of the magnetic field strength at multiple points was measured at continuous intervals. m Then, based on the saturation magnetization approximation law and derivation law, the saturation magnetization Js is fitted and solved. Finally, the austenite content is determined according to the theoretical calculation model of austenite content. The method described in this invention solves the influence of the constantly changing effective magnetic path length of traditional magnetometers on the measurement results. The method for determining austenite content is simple, has a solid theoretical basis, high measurement accuracy, and strong data repeatability.

The present invention discloses a sound output device, a sound output module, and an electronic device, the sound output device including a magnetic path system having a rectangular shape and including a permeable yoke and a central magnetic portion and a side magnetic portion provided on the permeable yoke, the side magnetic portions being located outside the central magnetic portion and surrounding and forming a magnetic gap with the central magnetic portion, the magnetic path system being provided with a mounting hole penetrating the permeable yoke and the central magnetic portion, a conductive support provided in the mounting hole, a diaphragm assembly facing the magnetic path system, a voice coil having one end connected to the diaphragm assembly and the other end suspended in the magnetic gap, and a vibration system including a damper having one end electrically connected to a pad of the conductive support and the other end connected to the diaphragm assembly and electrically connected to a lead wire of the voice coil. The present invention aims to provide a sound output device that can effectively increase the magnetic path, thereby effectively improving the magnetic field strength and increasing the BL value, thereby improving acoustic performance.

The invention relates to an axial magnetic flux motor which comprises a rotor assembly and two stator assemblies, the two stator assemblies are symmetrically arranged on the two sides of the axial end face of the rotor assembly, the winding current directions of the two stator assemblies are opposite, and magnetic flux paths of the two stator assemblies flow in the axial direction of the rotor assembly. The double stators are symmetrically arranged on the two sides of the axial end face of the rotor, and the winding current directions are opposite, so that axial flow of a magnetic flux path and symmetrical counteracting of magnetic pulling force are achieved. The two stator assemblies are symmetrically arranged on the axial end face of the rotor assembly, so that a magnetic flux path is parallel to a rotating shaft, the magnetic circuit length is remarkably shortened, the magnetic resistance is reduced, the power density and the torque density are directly improved, and the problem of low power density caused by long magnetic circuit and high magnetic resistance of a radial magnetic flux motor is solved; meanwhile, the vector sum of magnetic pulling forces generated by opposite current directions of the stator assembly is zero, so that single-side magnetic pulling forces are effectively counteracted, the load of the bearing is reduced, bearing components do not need to be additionally reinforced, and the weight index of the motor is optimized.

The invention relates to the technical field of physical quantity measurement, in particular to a ferromagnetic material magnetic characteristic parameter measurement method and related device.The method comprises the steps that in the pulse excitation environment, the excitation current of an excitation coil and the capacitor voltage of an integrating capacitor are obtained; the effective cross sectional area, the integrating capacitance value, the integrating resistance value, the number of turns of a secondary winding, the number of turns of an excitation winding, the equivalent magnetic circuit length, the coil resistance of an excitation coil and the input instantaneous power of the sample piece to be measured are obtained; calculating the magnetic induction intensity according to the effective cross sectional area, the integral capacitance value, the integral resistance value, the number of turns of the secondary winding and the capacitance voltage; calculating the excitation magnetic field intensity according to the excitation current, the number of turns of the excitation winding and the equivalent magnetic circuit length; according to the exciting current, the coil resistance and the input instantaneous power, the magnetic core loss of the to-be-measured sample piece is calculated, and the technical problem that in the prior art, magnetic characteristic parameters of ferromagnetic materials under millisecond pulses are difficult to measure is solved.

The invention relates to the field of power distribution network energy-saving facilities, in particular to a 10KV intelligent power-saving device of a power distribution system, which comprises iron cores and windings with the same number, the iron cores comprise two groups of core columns and iron yokes, the core columns and the iron yokes enclose to form a three-dimensional frame-shaped structure, the windings are wound outside the two groups of core columns of the adjacent iron cores, and the windings are wound outside the two groups of core columns of the adjacent iron cores. The three iron cores are distributed in an equilateral triangle mode, the core columns and the iron yokes are integrally formed, the adjacent core columns are communicated through the iron yokes to form a three-dimensional closed magnetic circuit, and the core columns and the iron yokes are arranged in a solid geometry mode so that the lengths of three-phase magnetic circuits in the three sets of windings can be consistent. The invention has the beneficial effects that the device has the functions of low loss, three-phase balance, harmonic suppression and dynamic voltage regulation, and can adapt to a complex power grid environment and improve the utilization efficiency of electric energy.

The invention relates to the technical field of transformer assemblies, and discloses a three-dimensional roll iron core assembly of a power saving device, the three-dimensional roll iron core assembly comprises an iron core assembly and a mounting shell, the iron core assembly comprises a lower support fixedly mounted at the bottom of an inner cavity of the mounting shell, and an iron core is fixedly mounted at the top end of the lower support; an upper bracket is arranged at the top ends of the three groups of iron cores so as to fix the top ends, and meanwhile, a pull rod with a hollow structure is arranged between the lower bracket and the upper bracket. The invention relates to a three-dimensional roll iron core assembly of a power-saving device, which effectively avoids the problem that lap joints are generated in the iron cores due to the arrangement of the iron cores and structures on the iron cores, so that the phenomenon that obvious high-resistance areas exist or magnetic flux density distortion is generated at the lap joints does not exist, and the three groups of iron cores are arranged in the shape of a Chinese character'pin '. Therefore, the lengths of magnetic circuits of the iron cores are completely equal, the sum of the lengths of the magnetic circuits is the shortest, meanwhile, the magnetic circuits among the three groups of iron cores are completely symmetrical, and no-load current is completely balanced.

The invention relates to a stator block, a motor stator, a motor and electrical equipment, and belongs to the technical field of motors. The stator block is made of oriented silicon steel and comprises stator teeth, a first stator yoke and a second stator yoke; the stator tooth comprises a main body part and a connecting part which are connected, the connecting part is provided with a first connecting surface and a second connecting surface which are deviated from each other, and the distance between the first connecting surface and the second connecting surface is gradually reduced in the direction that the main body part points to the connecting part; the first stator yoke and the second stator yoke are respectively connected with one end, far away from the main body part, of the connecting part, the first stator yoke is contacted with the first connecting surface, and the second stator yoke is contacted with the second connecting surface. According to the invention, the magnetic circuit length of the motor stator can be shortened, thereby reducing the overall magnetic resistance of a magnetic induction line passing through the stator, reducing the iron loss, improving the torque and efficiency of the motor, and achieving the improvement of the performance of the motor.

The invention discloses a design method of an SF6 / N2 current transformer, and the method comprises the steps: determining a transformer structure of the SF6 / N2 current transformer according to the working principle of the current transformer; calculating the cross section of an iron core in the transformer structure according to the given rated secondary capacity of the SF6 / N2 current transformer; determining the inner diameter of the iron core, the outer diameter of the iron core and the average magnetic path length in the mutual inductor structure according to the cross section of the iron core; according to the rated transformation ratio of a current transformer in the transformer structure and the number of turns of a secondary winding, the wire length of each turn of the winding in each layer is calculated, and the internal impedance of the secondary winding is calculated according to the wire length of each turn of the winding in each layer; the SF6 / N2 current transformer is generated according to the parameter data of the transformer structure, and the parameter data comprises the iron core section, the iron core inner diameter, the iron core outer diameter, the average magnetic circuit length and the internal impedance of a secondary winding.

The invention discloses a switched reluctance motor which comprises a stator, a winding coil and a rotor, the stator and the rotor are both of a salient pole structure, the rotor is coaxially nested on the inner side of the stator, and a three-dimensional air gap is formed between the stator and the rotor; the stator comprises a stator pole and a stator yoke, the stator pole comprises an excitation pole and an auxiliary pole, and the stator yoke is composed of a plurality of modules which are mutually connected through stator mortises and tenons; the rotor comprises rotor blocks and a non-magnetic-conductive rotor sleeve, the rotor blocks with the same size and shape are concentrically embedded into the surface of the non-magnetic-conductive rotor sleeve at equal intervals, and a rotor block gap is formed between every two adjacent rotor blocks. According to the switched reluctance motor, the length of a magnetic circuit can be effectively shortened, the overlapping area of stator and rotor poles at the aligned position is increased, the magnetic flux reversal phenomenon in the stator is eliminated, magnetic coupling among phases is reduced, the output torque density and efficiency of the switched reluctance motor are improved under the condition that the size of the motor is not changed, and meanwhile the reliability and fault tolerance of the motor are enhanced.

The application relates to the technical field of transformer assembly, and discloses a power-saving device three-dimensional winding core assembly which comprises a core assembly and a mounting shell, the core assembly comprises a lower support fixedly installed at the bottom of the inner cavity of the mounting shell, the top end of the lower support is fixedly installed with a core, and an upper support is arranged at the top end of the three groups of cores to fix the top end, and a pull rod with a hollow structure is arranged between the lower support and the upper support. The power-saving device three-dimensional winding core assembly effectively avoids the problem of lap joint seams in the core, so that there is no obvious high-resistance area or the phenomenon of magnetic flux density distortion at the lap joint seams, and the magnetic path length of the three groups of cores is completely equal and the sum of the magnetic path lengths is the shortest, and the magnetic paths among the three groups of cores are completely symmetrical and the no-load current is completely balanced.

This invention discloses a modular integrated plate-type saturated reactor assembly, comprising a main body, a magnetic core, and a base. The magnetic core is fixedly mounted on the upper surface of the base, and several windings are fixedly arranged on its peripheral side. Several partition structures and busbar assemblies are provided on the magnetic core, and several guide brackets are positioned above it. A magnetically guided slider slides within each guide bracket. A driving mechanism is provided within the guide brackets to drive the magnetically guided sliders to slide along the guide brackets. When the driving mechanism is activated, the magnetically guided sliders move above two adjacent magnetic core partitions, connecting or disconnecting these two partitions in the magnetic circuit. This invention uses magnetically shielding sheets filled in the partition slots to divide the magnetic core into multiple independent partitions. Electromagnets drive the magnetically guided sliders to move above two adjacent magnetic core partitions, connecting or disconnecting these two partitions in the magnetic circuit, thereby changing the magnetic circuit length and volt-second product of the magnetic core, avoiding customized design and reducing repetitive work.

The invention relates to a design method of a magnetic integrated 12-pulse wave self-coupling transformer rectifier, and belongs to the technical field of multi-pulse wave rectification in power electronics. A magnetic integration technology is applied to a multi-pulse rectification system, and a self-coupling transformer rectifier integrating a balance reactor and a phase transformer is designed. The balance reactor is integrated in the phase-shifting transformer, so that the use of a discrete magnetic element is reduced, the size of the rectifier is effectively reduced, the loss of the rectifier is reduced, and the transmission efficiency and the power density of the whole machine are improved. The phase-shifting transformer in the magnetic integrated self-coupling transformer rectifier has the characteristics of planarization, magnet yoke balance and Y structure symmetry, and compared with a traditional EE structure phase-shifting transformer, the designed phase-shifting transformer has the same three-phase magnetic circuit length and magnetic resistance, and has the advantages of high reliability and high reliability. The problem of high content of non-characteristic sub-harmonics and total harmonics caused by asymmetry of an EE structure phase-shifting transformer in a multi-pulse rectifier can be solved.

The application discloses a switched reluctance motor, comprising a stator, winding coil and rotor, the stator and rotor are both salient pole structure, the rotor is coaxially nested in the inside of the stator, and three-dimensional air gap is formed between the stator and rotor; the stator comprises stator pole and stator yoke, the stator pole comprises excitation pole and auxiliary pole, the stator yoke is composed of several modules and is connected with each other through stator mortise and tenon; the rotor comprises rotor block and non-permeable rotor sleeve, the rotor block with same size and shape is embedded into the surface of the non-permeable rotor sleeve in concentric and equal interval, and rotor block gap is formed between adjacent rotor blocks. The application can effectively shorten the magnetic circuit length, increase the overlapping area of stator and rotor poles in alignment position, eliminate the magnetic flux reverse phenomenon in the stator, reduce the magnetic coupling between each phase, improve the output torque density and efficiency of the switched reluctance motor under the condition of not changing the motor volume, and enhance the reliability and fault tolerance of the motor.

The present invention discloses a design method for an integrated inductor and related components, relating to the field of integrated inductor design. The method includes determining the equivalent magnetic circuit of the magnetic core based on its structure; determining the magnetic flux of each phase in the magnetic core based on the equivalent magnetic circuit; determining the cross-sectional area of ​​the winding post, the cross-sectional area of ​​the common magnetic yoke, and the cross-sectional area of ​​the decoupling magnetic yoke based on the maximum magnetic flux; determining the length of the winding post for each phase based on the number of turns of the winding, the maximum DC bias current of the integrated inductor, the equivalent magnetic circuit length of the winding post, and the equivalent magnetic circuit lengths of the common magnetic yoke and the decoupling magnetic yoke; and determining the size of the integrated inductor based on the cross-sectional area of ​​the winding post, the cross-sectional area of ​​the common magnetic yoke, the cross-sectional area of ​​the decoupling magnetic yoke, and the length of the winding post for each phase. By integrating the inductors, multiple staggered parallel inductors share a single magnetic core, thereby reducing the volume and weight of the converter.

This invention provides a magnetic sensitive element, a method for measuring an external magnetic field using the same, and a magnetic sensor. The magnetic sensitive element includes first and second magnetic cores, and first and second coils. The first and second coils have equal numbers of turns, equal magnetic circuit lengths, and opposite winding directions. The first and second magnetic cores have equal permeability, and the cross-sectional areas of each section perpendicular to the magnetic circuit direction in the first and second magnetic cores are equal. Under the action of an excitation current I(t) of the same magnitude but opposite direction, the first and second coils generate a magnetic field. When the excitation current is +I... s to‑I s When the magnetic field strength varies within the range of +H, s To -H s The B-H characteristic curves of the first and second magnetic cores exhibit linear variation within a given range. This component has a simple structure, reducing the requirements for the magnetic cores and lowering costs. In actual measurements, the first and second magnetic cores operate within this linear range. By measuring the inductance values ​​of the two sets of coils, the applied external magnetic field information can be obtained. This method is simple and easy to implement, and it improves detection accuracy.