21results about How to "Increase the inductance value" patented technology

The invention relates to the technical field of microelectronics, and discloses a processing method of a passive chip for magnetic field energy collection, which comprises the following steps: S1, providing a chip with a flexible substrate, and depositing a first dielectric layer on the surface of the substrate to isolate the substrate from a coil; s2, forming a three-dimensional spiral coil structure on the dielectric layer by adopting a three-dimensional micro-nano processing technology, wherein the coils are stacked layer by layer in an asymmetric spiral form along a direction perpendicular to the substrate; and S3, in the forming process of the coil, a multi-wire-harness cross arrangement design is used, so that the inductance increment of a unit area is maximized. Through the design of the three-dimensional spiral coils and the asymmetric coils, the limitation of a traditional planar coil structure on magnetic field coupling and induction efficiency is broken through, the three-dimensional spiral coils are arranged in a multi-layer mode in the vertical direction, magnetic flux coupling between the coils is tighter, and the inductance value and the induced electromotive force are remarkably improved.

The invention relates to an integrated inductor and a preparation method and application thereof. The integrated inductor internally comprises middle-crystallization-degree magnetic powder and high-crystallization-degree magnetic powder. The crystallization degree of the middle-crystallization-degree magnetic powder is 40%-80%; the crystallization degree of the high-crystallization-degree magnetic powder is larger than 95%, and the structure of the middle-crystallization-degree magnetic powder is a structure that a nanocrystalline phase is surrounded by an amorphous phase. The high-crystallization-degree magnetic powder and the medium-crystallization-degree magnetic powder are combined together to serve as the internal magnetic powder of the integrated inductor, and the soft magnetic material prepared from the medium-crystallization-degree magnetic powder with the structure that the amorphous phase surrounds the nanocrystalline phase has the excellent loss characteristic under the high-frequency condition of MHz or above; meanwhile, the high-crystallization-degree magnetic powder has the advantage of high magnetic conductivity, and after the high-crystallization-degree magnetic powder and the high-crystallization-degree magnetic powder are subjected to optimized grading, the integrated inductor can further have the high magnetic conductivity while having the excellent loss characteristic under the high-frequency condition, namely, the integrated inductor has the high inductance value at the same time.

The invention provides a high-inductance copper-iron co-fired inductor which comprises soft magnetic metal powder, a copper conductor and a nanocrystalline strip, the copper conductor and the nanocrystalline strip are vertically connected and buried in the soft magnetic metal powder, and the two ends of the copper conductor extend out of the soft magnetic metal powder; the soft magnetic metal powder comprises mixed powder of gas atomized iron-nickel-molybdenum powder with different particle sizes, a passivating agent, a coating agent and a lubricating agent. The passivating agent is a mixed solution of oxalic acid and nitric acid; the coating agent is an acetone solution of fluorosilicone resin, titanium trifluoride, aluminum trifluoroacetyl pyruvate and nano barium titanate; the lubricant is a mixture of gas-phase aluminum oxide and niobium diselenide; the thickness of the nanocrystalline strip ranges from 1 micrometer to 1.5 micrometers, and the width of the nanocrystalline strip ranges from 2 mm to 4 mm. According to the inductor, the inductance value of the inductor reaches the highest value by utilizing the gas atomization iron-nickel-molybdenum powder with the highest magnetic conductivity in the soft magnetic metal powder, and meanwhile, the gas atomization iron-nickel-molybdenum powder has very low loss and excellent stability, so that the inductor has good loss performance and excellent reliability at the same time.

The invention discloses a loss characteristic negative temperature coefficient integrally-formed inductor and a preparation method thereof, and the method comprises the steps: preparing soft magnetic metal powder: carrying out passivation, coating, granulation and lubricant adding treatment on carbonyl iron powder and gas atomization iron nickel powder, and obtaining two kinds of soft magnetic metal powder; pressing the treated atomized iron-nickel powder to serve as a middle column of the integrally-formed inductor, and performing heat treatment; the middle column is bonded in the coil; and embedding the coil into the treated carbonyl iron powder, carrying out compression molding, and baking to obtain the iron core. The obtained integrally-formed inductor is high in inductance value, the loss of the integrally-formed inductor cannot be increased along with temperature rise, the conversion efficiency of the integrally-formed inductor at the temperature of 100 DEG C is higher than 25 DEG C, and the integrally-formed inductor has the advantages of being high in inductance and loss negative temperature coefficient.

An inductor component includes a blank, a second interlayer insulating layer (33), and an inductor wiring (50). The blank has a first main surface and contains a magnetic material. The second interlayer insulating layer (33) extends in parallel with the first main surface within the blank and is flat. The inductor wiring (50) is in contact with a surface in the second interlayer insulating layer (33) that is parallel with the first main surface. A direction from the inductor wiring (50) side toward the second interlayer insulating layer (33) side in a direction orthogonal to the first main surface is defined as a first positive direction (X1), and a direction opposite to the first positive direction (X1) is defined as a first negative direction (X2). A surface of an outer surface of the second interlayer insulating layer (33) that faces a direction parallel with the first main surface is defined as an end surface (ED). In a certain cross section orthogonal to a center line of the inductor wiring (50), the entire end surface (ED) is an inclined surface that faces the direction parallel with the first main surface and the first negative direction (X2), or the entire end surface (ED) is an inclined surface that faces the direction parallel with the first main surface and the first positive direction (X1).

This invention relates to a DC circuit breaker that adaptively adjusts the current-limiting inductor based on fault current. It includes at least two parallel branches, each branch consisting of a first current limiter, a variable inductor, and a second current limiter connected in series. A switch control circuit is connected in parallel to the first and second current limiters. One end of multiple first current limiters and one end of multiple second current limiters are connected in parallel. The anode of a thyristor is connected between the variable inductor and the second current limiter in the previous branch of the two adjacent branches, and the cathode of the thyristor is connected between the first current limiter and the variable inductor in the next branch of the two adjacent branches. This invention also discloses a current-limiting method for the DC circuit breaker that adaptively adjusts the current-limiting inductor based on fault current. This invention adaptively suppresses the current rise rate, current magnitude, and fault clearance based on the magnitude and rise rate of the fault current in the distribution line, effectively improving fault handling efficiency and the operational safety of the distribution line.

This invention provides a rod-shaped magnetic core and its preparation method, an inductor and its preparation method, and their applications, belonging to the field of non-destructive testing technology for inductor devices. The invention provides a method for preparing a rod-shaped magnetic core, comprising the following steps: filling a mold hole with nanocrystalline alloy wire along the extension direction of the mold hole; then infiltrating the gaps between the nanocrystalline alloy wire with epoxy resin for curing to obtain the rod-shaped magnetic core; the diameter of the nanocrystalline alloy wire is 0.05–0.2 mm; the diameter of the mold hole is 0.3–0.5 mm. The preparation method of this invention can prepare rod-shaped magnetic cores with a diameter of 0.2 mm or more, and the epoxy resin in this invention enhances the strength of the rod-shaped magnetic core, preventing it from breaking when wound with a coil. Furthermore, the rod-shaped magnetic core of this invention does not have the problems of uneven surface and burn-out layer, and does not reduce the relative permeability of the magnetic core.

This application relates to the field of transformer technology, specifically to a chip transformer and power module, including a ceramic substrate; the ceramic substrate includes a plurality of stacked ceramic diaphragms; conductive posts are provided on the ceramic diaphragms, the conductive posts extending perpendicularly to the ceramic diaphragms; helical coils are provided on the surface of the ceramic diaphragms, and the ends of adjacent helical coils are connected through the conductive posts; at least two helical coils are connected through the conductive posts to form a coil winding. The embodiments of this application can significantly increase the number of turns in the winding by using planar helical coils, effectively improving the inductance value and enhancing the coupling coefficient between the primary and secondary coils while achieving a miniaturized integrated design.

According to the design scheme of the electric reactor special for the high-power three-phase charger, due to the fact that the 3D printing and laser irradiation technologies are adopted for the electric reactor iron core special for the charger, and the polymer composed of the insulating ionic glue sensitive to laser and the iron-nickel-based amorphous alloy powder is doped, the electric reactor iron core has the high inductance value and the low loss; the traditional design thought that cold-rolled silicon steel sheets are subjected to heat treatment, annealing, dipping in insulating paint and then separated and overlapped through epoxy glass cloth to form gaps is changed at one stroke; the novel iron core body shaped like the Arabic numeral eight is formed by stacking a plurality of iron core sheets, and due to the fact that each iron core sheet is not provided with an obvious cutting opening, magnetic flux leakage is particularly reduced, and the energy-saving effect of the electric reactor is greatly improved. In the embodiment, the iron loss of the reactor special for the three-phase charger can be reduced to three fifths of that of a traditional reactor, the weight of the reactor is only two thirds of that of a cold-rolled silicon steel sheet, the calorific value of the reactor during working is only half of the original calorific value, and the application prospect is very wide.

An aerosol generation apparatus and an induction coil. The aerosol generation device includes: a chamber used to receive or store an aerosol generation substrate (A); an induction coil (50) used to generate a changing magnetic field; and a susceptor (30) configured to be penetrated by the changing magnetic field and generate heat, thereby heating the aerosol generation substrate (A) to generate an aerosol. The induction coil (30) is structured as a solenoid coil, and a cross section of a wire material forming the induction coil (50) has a first dimension extending along a radial direction and a second dimension extending along an axial direction, the first dimension being greater than the second dimension. The wire material of the induction coil (50) has a smaller or thinner size in the axial direction, and compared with a coil wound by a wire with a circular cross section, there are more coil turns or windings per unit length, which is beneficial to increasing the inductance value.

The invention discloses a low-loss power matching circuit of a GaN monolithic amplifier, which belongs to the technical field of amplifiers, comprises a series inductor Ls, a planar transmission line transformer unit and a lumped network unit, and solves the technical problems of low loss and impedance conversion in a broadband output matching circuit of a GaN HEMT (High Electron Mobility Transistor) power amplifier. The power loss of the circuit is reduced, the radio frequency short-circuit end of the transmission line transformer can be used as a direct current feed end to provide a drain voltage path for the transistor, and an additional direct current feed circuit is omitted, so that the circuit design is simplified, the circuit area is reduced, the spiral small planar transmission line transformer is adopted, a matching circuit is further miniaturized, and the power consumption is reduced. The chip area is reduced, and the production cost is reduced.

The invention discloses an iron-silicon-chromium soft magnetic powder material which comprises the following raw materials in percentage by mass: 2-7% of silicon, 2-10% of chromium, 0-5% of nickel and cobalt and the balance of iron, the use amount of nickel and cobalt is greater than 0, and the sum of the use amount of silicon, chromium, nickel, cobalt and iron is 100%. The iron-silicon-chromium soft magnetic powder material is high in powder apparent density and tap density, low in powder oxygen content and high in inductance value and magnetic conductivity, and can meet the high-performance requirements of electronic components on metal soft magnetic alloy powder.

The invention belongs to the technical field of electronic devices, and discloses a chip inductor. The chip inductor comprises a leading-out end layer and an inner electrode. A first conductor electrically connected with the outer electrode is arranged on the surface of the leading-out end layer; the inner electrode comprises a plurality of inductance layers stacked in sequence, leading-out end layers are arranged at the two ends of the inner electrode respectively, second conductors used for forming induction coils are arranged on the surfaces of the inductance layers, third conductors are further arranged on the surfaces of the inductance layers located at the two ends of the inner electrode, and one ends of the third conductors are connected with the second conductors. The other end of the third conductor is connected with the first conductor. According to the induction coil, the third conductor is directly formed on the inductance layer at the two ends of the inner electrode, the magnetic circuit length of the induction coil can be shortened, and the quality factor (namely the Q value) is improved.

The invention discloses a multi-port adaptive DC fault current limiter, the multi-port adaptive DC fault current limiter comprises a plurality of magnetic core units and a circuit unit, one end of each magnetic core unit is connected with a corresponding DC port through a corresponding DC circuit breaker, and the other end of each magnetic core unit is connected to a high-voltage DC bus; the circuit unit comprises a diode bridge circuit and an external follow current branch, the midpoint of each bridge arm of the diode bridge circuit is correspondingly connected with one end of each magnetic core unit, and the common cathode end and the common anode end of the diode bridge circuit are connected with the external follow current branch to form an energy consumption loop. According to the invention, bidirectional, rapid and adaptive limitation of the short-circuit fault current of the multi-port flexible DC system can be realized.

This invention relates to coil components. The invention provides a coil component capable of ensuring mode-switching characteristics and improving inductance. The coil component comprises: a core having a wound core portion; and a coil wound along the axis of the wound core portion, including a plurality of wires, the coil having a winding region wound around the wound core portion, the winding region having a stranded portion formed by twisting the plurality of wires together, and a parallel portion in which the plurality of wires are not twisted together and run parallel to each other.

The inductance element comprises the coil assembly, the coil assembly comprises an insulating main body and a coil arranged in the insulating main body, a first conductive part and a second conductive part which are arranged in a spaced mode in the first direction are arranged in the insulating main body, and the overlook plane where the winding direction of the coil is located is perpendicular to the first direction; the orthographic projection of the coil on the overlook plane is roughly a rectangular ring, and the coil is arranged between the first conductive part and the second conductive part and electrically connected in sequence. Wherein the rectangular ring is provided with an inner contour line and an outer contour line which are opposite to each other, the orthographic projection of the first conductive part on the overlook plane is an inscribed circle tangent to any two adjacent edges of the outer contour line, and the orthographic projection of the second conductive part on the overlook plane is located in the inner contour line. The single-layer coil of the coil assembly has a large inductance value and a high quality factor, so that the inductance element has the large inductance value and the high quality factor at the same time.

The invention provides an inductor and a preparation method and application thereof, the inductor comprises a coil which is spirally wound in a layered mode, and gaps between layers of the coil are filled with magnetic powder. According to the inductor provided by the invention, the gaps between the layers of the coil which is spirally wound in a layered manner are filled with the magnetic powder, so that the inductance value is improved, the direct-current resistance of the inductor is reduced, and the efficiency of the inductor is improved; according to the inductor, the problem that the efficiency of the inductor cannot be effectively improved due to the fact that the lacquering film is not resistant to high temperature is solved.

The utility model provides a planar spiral inductor, and relates to the technical field of inductors. The planar spiral inductor comprises an inductor body, an inductor arm, a bottom plate assembly and a feed assembly. The inductor body is provided with a groove with an opening in one end, the bottom plate assembly is arranged on the bottom wall, opposite to the opening, of the groove, the inductor arms are arranged on the side wall of the groove with the circumferential direction of the groove as the spiral direction, a gap is formed between every two adjacent circles of inductor arms, and the gaps are filled with media. The dielectric is a material with the relative dielectric constant of 8-12, the relative conductivity of 0.8-1.2 and the dielectric loss tangent value of 0; the feed assembly is connected with the inductance arm and used for exciting the inductance arm. According to the planar spiral inductor, the gap between every two adjacent circles of inductance arms is filled with the medium, the inductance value can be remarkably improved under the condition that the size of the inductance coil is not changed, the manufacturing mode of the planar spiral inductor is simple, materials selected by the medium are easy to obtain, and the planar spiral inductor is high in applicability and practicability.

The invention relates to the technical field of semiconductor packaging, in particular to a glass substrate with a built-in inductor, a packaging structure and a preparation method of the packaging structure. The glass substrate with the built-in inductor comprises the glass core layer and the inductor arranged in the glass core layer, three-dimensional integration of the inductor in the vertical direction is achieved, the thickness of a packaged product is greatly reduced, meanwhile, a spiral conductor structure in the inductor is wrapped, fixed and protected by the glass core layer, and the packaging quality is improved. The mechanical shock resistance, the vibration resistance and the bending resistance of the glass substrate are far better than those of a packaging process of a surface-mounted substrate surface, and the strength of the glass substrate with the built-in inductor is improved. Furthermore, a plurality of layers of glass substrates with built-in inductors are bonded to obtain a multi-turn inductor, and under the constraint of miniaturization, a high inductance value is realized, so that the utilization efficiency of the packaging structure on a magnetic field is higher, and the energy transfer or energy storage capability is stronger. And the glass substrate with the built-in inductor only needs to be produced on a traditional glass substrate, so that the risk, time and cost of process development are greatly reduced.

The present invention provides a coil component. In a common mode choke coil as an example of a coil component, good mode conversion characteristics can be obtained even if the number of turns of the wire is increased to obtain a high inductance value. A wire assembly portion (44) composed of two wires twisted together is wound around a winding core portion (45). The wire assembly portion is composed of an inner layer portion (N) that is wound in contact with the peripheral surface of the winding core portion starting from the first end portion (46) side of the winding core portion; an outer layer portion (G) that is wound on the outer peripheral side of the inner layer portion; an outward transition portion that transitions from the inner layer portion to the outer layer portion; and an inward transition portion that transitions from the outer layer portion to the inner layer portion. The wire assembly portion is drawn out from the middle position in the winding center axis direction of the inner layer portion by means of the outward transition portion to form the outer layer portion, and then returns to the above-mentioned middle position of the inner layer portion by means of the inward transition portion.