60 results about "Ac resistance" patented technology

The invention relates to a semi-analytical calculation method for loss of a Litz wire winding of a high-frequency transformer, and the method comprises the steps: extracting equivalent electromagnetic parameters of a single-turn Litz wire through finite element simulation software, taking the equivalent electromagnetic parameters as the calculation premise of an AC resistance coefficient of a homogenized Litz wire winding, and accurately improving the calculation precision for a complex Litz wire winding. Compared with three-dimensional finite element simulation, the method has the advantages that calculation speed is increased and calculation power resources are saved while calculation precision is considered, so that calculation support is provided for prediction of winding loss in subsequent optimization design of the high-power high-frequency transformer; the technical problem that in the prior art, it is difficult to balance the balance between the calculation precision and the speed due to the complex multi-strand structure of the litz wire is solved.

The invention discloses a conducting wire state evaluation method and device based on current-carrying capacity, terminal equipment and a storage medium, and belongs to the field of conducting wires, and the method comprises the steps: determining the conducting wire radiation heat dissipation power, conducting wire convection heat dissipation power and conducting wire sunlight heat absorption power of a target conducting wire according to an environment parameter, a physical attribute parameter and a real-time operation parameter; calculating the theoretical current-carrying capacity of the target wire according to the nominal alternating-current resistance value in the physical attribute parameters, the calculated convection heat dissipation power of the wire, the calculated radiation heat dissipation power of the wire and the calculated sunlight heat absorption power of the wire; and according to the theoretical current-carrying capacity, the load current, the wire convection heat dissipation power, the wire radiation heat dissipation power and the wire sunlight heat absorption power, calibrating the nominal alternating current resistance value to obtain a calibrated alternating current resistance value, and calculating the calibrated current-carrying capacity so as to evaluate the operation state of the target wire. According to the invention, the problem of inaccurate lead state evaluation in the prior art can be solved.

The application discloses a flyback transformer winding loss evaluation method, device, equipment and storage medium, and the method comprises the following steps: acquiring electrical data in a preset switching period, and actual primary side current waveform and actual secondary side current waveform of a to-be-tested flyback transformer under the electrical data, and constructing a current calculation model to obtain a primary side current change function and a secondary side current change function; then, the primary side current change function and the secondary side current change function are subjected to Fourier decomposition to obtain a primary side DC component, a primary side harmonic component, a secondary side DC component and a secondary side harmonic component; then, selected primary side harmonic components, selected primary side harmonic frequencies, selected secondary side harmonic components and selected secondary side harmonic frequencies are determined; subsequently, the primary side AC resistance, the primary side DC resistance, the secondary side AC resistance and the secondary side DC resistance of the flyback transformer are acquired; finally, the winding loss value of the to-be-tested flyback transformer is calculated. Through implementation of the application, the winding loss of the flyback transformer can be quantitatively calculated.

The embodiment of the invention provides a cable alternating current resistance measuring system, method and equipment. The system comprises a power supply unit, a zero-phase closing switch unit, a transition loop unit, a to-be-measured cable and a cable measurement loop unit, and the zero-phase closing switch unit is connected with the transition loop unit and the cable measurement loop unit and used for controlling connection or disconnection between the transition loop unit or the cable measurement loop unit and the power supply unit. The power supply unit is connected with the zero-phase closing switch unit and is used for supplying power to the transition loop unit or the cable measurement loop unit, and the transition loop unit is connected with the zero-phase closing switch unit and is used for stably transitioning closing overvoltage generated by the power supply unit to preset voltage; and the cable measurement loop unit is connected with the zero-phase closing switch and the cable to be measured and is used for determining the alternating-current resistance of the cable to be measured. According to the technical scheme, the influence of switching-on overvoltage in a loop can be avoided, and the alternating-current resistance of the to-be-tested cable can be accurately obtained.

The application provides an MCR-WPT system micro-plane coil structure parameter optimization method based on a kingfisher optimization algorithm, which comprises the following steps: analyzing a compensation structure network, deducing an energy transmission efficiency form of the MCR-WPT system; analyzing physical structure parameters in the micro-plane coil, calculating self-induction, mutual induction and alternating current resistance; calculating a theoretical self-induction value of the micro-plane coil; calculating a mutual induction coefficient value between the coupling coils; winding the coupling coils with Litz wires; calculating the alternating current resistance of the Litz wires under high-frequency alternating current; making the coils at the transmitting end and the receiving end have the same specifications and parameters; establishing a coupling coil structure optimization model; setting the upper and lower limits of the parameter variables; adding constraint conditions; taking the energy transmission efficiency as an optimization target of the objective function; and performing optimization calculation on the coupling coil structure optimization model by using the kingfisher optimization algorithm. The method has shorter average running time and faster operation speed.

The invention discloses a transformer winding loss calculation method and a related device. The method comprises the steps of obtaining harmonic current of an environment where a transformer winding is located; calculating the AC resistance of the transformer winding according to the harmonic current through a skin effect and a proximity effect; acquiring a non-sine-wave current of an environment where the transformer winding is located, and decomposing the non-sine-wave current into a plurality of harmonic components; after the height of the transformer winding is adjusted to be equal to the height of the magnetic core window based on a preset transformer winding design method, the frequency of each harmonic component is calculated, and the total winding loss is calculated according to the frequency of the harmonic component and the alternating-current resistance. By optimizing the structure of the winding and the loss calculation method, the operation efficiency and reliability of the medium-frequency transformer are effectively improved, and energy loss caused by the high-frequency electromagnetic effect is reduced. Therefore, the problems of loss increase caused by inaccurate winding loss calculation and winding height mismatching in a high-frequency environment and complex loss caused by harmonic current in the prior art are solved.

This application provides a method for determining a filtering device, a storage medium, and a filtering device. The method includes acquiring a first test result, which is obtained by conducting conducted EMI interference testing on a first domain controller based on a current method. Based on the first test result, a first out-of-range frequency point of the first domain controller is determined. The rated current of a common-mode inductor is determined based on the actual input current of the first domain controller. A first AC resistance of the common-mode inductor is determined based on the out-of-range value corresponding to the first out-of-range frequency point and the first out-of-range frequency point. A target size of the common-mode inductor is determined based on the spatial dimensions of the first domain controller. The common-mode inductor is then designated as the first filtering device for the first domain controller, thereby performing conducted EMI filtering on the first domain controller. This embodiment enables rapid, effective, and low-cost conducted EMI interference testing through a domain controller.

The application discloses a large-section conductor alternating current resistance automatic testing system and method, and relates to the electrical testing field.The system comprises a computer, an FPGA / real-time system, a D / A converter 1, a D / A converter 2, a D / A converter 3, an A / D converter, a voltage-controlled current source, electrodes, a GIL conductive pipe sample, a through-type high-precision current transformer, a high-precision resistor R, a lock-in amplifier and a coupling transformer with a load Z.The application eliminates the mutual inductance between a current loop and a voltage testing loop and the influence of the self-inductance of a sample, generates a 90-degree leading current voltage based on an equivalent circuit model through the FPGA and the D / A converter, and is used for compensating the voltage on the self-inductance of the sample and the mutual inductance in the voltage testing loop, reducing the phase angle between the voltage on the measured conductor and the exciting current, solving the precision problem of the large-section conductor alternating current resistance testing, and realizing the accurate and automatic measurement of the large-section conductor alternating current resistance.

The purpose of the present invention is to reduce AC resistance. In a multilayer substrate (100), a plurality of ground electrodes (41-44) are separated from each other in the thickness direction (D1) of a laminated substrate (1), and are adjacent to a plurality of signal lines (21-24) in the width direction of the plurality of signal lines (21-24). In a first transmission line region where the maximum line width of the plurality of signal lines (21-24) is minimum, the plurality of signal lines (21-24) do not overlap with any one of the plurality of ground electrodes (41-44) in the thickness direction (D1) of the laminated substrate (1). In a second transmission line region (102) in which the maximum line width of the plurality of signal lines (21-24) is the largest, one ground electrode (41) among the plurality of ground electrodes (41-44) overlaps with signal lines (22-24) other than the signal line (21) adjacent to the one ground electrode (41) among the plurality of signal lines (21-24).

The utility model discloses a low-temperature-rise inductor, which belongs to the technical field of inductors and comprises a magnetic core, a wire body and a shell, the inductor is novel in design and ingenious in device, heat can be conducted and dissipated more effectively by introducing high-heat-conductivity materials into the magnetic core and the wire body, the magnetic core and the wire body are made of high-heat-conductivity copper alloy materials, the temperature rise of the inductor is reduced, the wire body adopts the flat winding or Litz wire winding design, the surface area of the winding is increased, the heat dissipation efficiency of the winding is improved, and the service life of the inductor is prolonged. The flat winding and the Litz wire can reduce the skin effect and the proximity effect and reduce alternating current resistance, so that heating is reduced, a special heat dissipation channel is designed in the inductor, it is ensured that heat can be rapidly conducted to the outside, the heat dissipation channel can effectively guide heat to flow, heat is prevented from being accumulated in the inductor, and therefore the heat dissipation effect of the inductor is improved. By improving materials and structural design, the low-temperature-rise inductor can effectively reduce temperature rise under the high-current condition, and the overall performance and reliability are improved.

The application discloses a kind of litz wire winding intelligent design optimization methods, and the litz wire winding ac resistance and porosity are obtained by neural network and hfss, the model of litz wire winding is constructed using hfss simulation software to simulate the ac resistance of litz wire winding under different materials, different number of turns, different litz wire winding radius and different frequency, to complete the training data and test data used to litz wire winding neural network model. Manual grid division is used to simplify the solving steps and time, and the accuracy is ensured. The litz wire winding neural network model is used to automatically train and test using particle swarm optimization algorithm to improve the network model, and finally the litz wire winding neural network model can quickly and accurately obtain the required litz wire winding ac resistance. The application can be used to quickly and accurately obtain the litz wire winding ac resistance under different requirements, reduce the amount of calculation and working time, greatly improve the efficiency.

The utility model provides an antenna module and an electronic terminal device, the antenna module comprises a first radiation antenna, a second radiation antenna, a feed assembly, a grounding assembly and a substrate, the feed assembly and the grounding assembly are electrically connected with the first radiation antenna and the second radiation antenna; the first radiating antenna and the second radiating antenna are arranged on the substrate; the second radiation antenna is arranged around the first radiation antenna; the first radiation antenna comprises a first coil and a second coil, the first coil and the second coil are attached to the two faces of the substrate respectively, the first coil and the second coil are connected in series, and the second radiation antenna surrounds the first coil and / or the second coil. The antenna module provided by the utility model not only can simplify the overall circuit of the antenna and effectively improve the net space of the antenna, but also can effectively avoid the overall resistance of the antenna by changing the wiring connection of the coil, so that the first radiating antenna can obtain larger inductance under the condition of lower alternating-current resistance.

The embodiment of the invention provides a stator winding, a motor and a motor optimization method, the stator winding comprises a multi-phase winding structure, each phase winding structure comprises at least one stator slot, each stator slot comprises at least one copper flat wire and at least one aluminum flat wire, and the copper flat wire is arranged at the notch of the corresponding stator slot; the aluminum flat wires are arranged at the bottoms of the corresponding stator grooves. Therefore, the copper flat wire and the aluminum flat wire which are connected in series and in parallel are arranged in the stator slot of each phase winding structure, the copper flat wire is arranged corresponding to the slot opening of the stator slot, and the aluminum flat wire is arranged corresponding to the slot bottom of the stator slot, so that the problem that the alternating current resistance of a copper flat wire motor in the prior art rises quickly along with the rotating speed is solved; and the motor has the characteristics of low winding resistance and high working condition efficiency in a wide speed domain range, so that the energy consumption of the motor is effectively reduced.

The utility model discloses a special alternating current resistance box for detecting a conductivity meter, which relates to the technical field of alternating current resistance boxes and comprises a resistance box main body, wiring grooves are arranged on the back of the resistance box main body at equal intervals, a wiring mechanism is arranged on the outer side of the resistance box main body, and the wiring mechanism comprises a bearing assembly and a pressing assembly. The bearing assembly and the pressing assembly are used in cooperation, the bearing assembly comprises rotating shafts, the rotating shafts are symmetrically and rotatably connected to the outer side of the resistance box body, and rotating ends are fixedly connected to the outer sides of the two rotating shafts. According to the alternating-current resistance box special for detecting the conductivity meter, due to the arrangement of the ground wiring mechanism, it can be ensured that electric wires are arranged in the wire grooves of the bearing columns in order, the electric wires are kept stable and prevented from loosening or falling off through the tension of the tension springs, the situation that the electric wires are not attached due to the toughness of the electric wires is avoided, the structure is simple, and the practicability is high. And the practicability is high.

The application relates to a flat wire stator with multi-parallel winding, comprising a stator core and a flat wire winding, the stator core has a plurality of stator slots, the number of layers of the flat wire winding in the stator slots is ten, and the flat wire winding comprises a three-phase winding; the three-phase winding is three groups of parallel winding lines, each group of winding lines is five parallel branches, and each branch comprises a plurality of PIN wire conductors arranged in the stator slots and connected in series with each other. After the winding is divided into ten layers, the thickness direction size of each layer of conductors is relatively small, the increase of high-frequency alternating current resistance can be obviously inhibited, and the design of five parallel branches per phase makes the total current be uniformly shunted to the five branches, and the current borne by each branch is only 1 / 5 of the total current. This reduces the current stress of each PIN wire conductor, allows the use of a smaller cross-sectional area of the conductor, reduces the Joule heat concentration in the branch, and improves the motor temperature rise.

Such an apparatus, having a structure to measure a battery parameter of a battery of a plurality of batteries, can be implemented in a variety of applications. The apparatus can be configured to measure an alternating current (AC) electrical impedance of a battery cell by processing a difference between the battery cell and another battery cell. The battery cell under measurement experiences an AC excitation, while the other does not, with both battery cells sharing a common load current. This differential approach can reduce sensitivity to noisy battery load currents, which are common to both battery cells. This differential approach can also eliminate or substantially reduce a large direct current (DC) offset, i.e., the battery potential itself, under which AC signal measurements are burdened.

The application discloses a cable conductor AC resistance testing device and method, which directly supplies a large current to a cable conductor, measures the temperature, current and voltage of the powered cable conductor, adopts the measured data and a function relationship between the interference voltage value and the cable conductor radius which is fitted in advance, and obtains the cable conductor AC resistance, so that the reverse current is not applied to the cable metal shielding layer, and the proximity effect between the cable conductor and the shielding layer is avoided to influence the test result.

The invention belongs to the technical field of computer-aided engineering and power electronics, and particularly relates to a rotating motor rotor overvoltage calculation method and system based on an industrial database, and the method comprises the steps: obtaining a preset motor design reference value, a preset material attribute parameter and a preset voltage change rate threshold value in the industrial database; monitoring the voltage at the input end of the motor in real time to obtain a real-time voltage change rate; performing spectral analysis on the transient voltage waveform, and calculating a dominant angular frequency; calculating dynamic alternating-current resistance and dynamic alternating-current inductance through a frequency self-adaptive parameter model; coupling the dynamic alternating-current resistor and the dynamic alternating-current inductor to an overvoltage propagation model, and calculating a rotor overvoltage waveform; generating a high-frequency impedance model, and providing the high-frequency impedance model to a frequency converter control system; according to the method, the self-adaptive model capable of adjusting the resistance and inductance parameters of the motor in real time according to the actual frequency characteristics of the transient event is constructed, so that the final overvoltage calculation result is highly consistent with the physical reality.

The invention belongs to the technical field of aviation, and particularly relates to an aviation high-power motor round wire alternating current copper loss evaluation and reduction method, which comprises the following steps of: based on a stator after wire embedding, measuring wire resistances at different frequencies and different rotor positions by adopting an alternating current resistance tester, further calculating alternating current copper loss again by using simulated phase current, and judging whether the alternating current copper loss is met or not; if yes, completing the design; and if not, optimizing the alternating current copper loss again, and repeatedly calculating the alternating current copper loss until the alternating current copper loss meets the requirement. MotorCAD software is adopted to calculate alternating current copper loss through finite elements, modeling is simple, winding subdivision is refined, and the difference between the calculation result and the actual result is small. The stator winding mode is optimized, and the ring current of the groove leakage flux on the same turn of wires located at different groove height positions is reduced; and the stator slot size is optimized, so that the slot size with relatively low alternating current copper consumption can be obtained. Part of tests prove that the alternating current copper consumption can be greatly reduced, and the motor efficiency is improved.

The invention discloses a method and a system for predicting coil parameters of a wireless power transmission system, and relates to the technical field of coil electrical parameter calculation, finite element simulation is performed based on an established two-dimensional parameterized geometric model of a circular coil to obtain training data, and the training data is used to train an improved Gaussian process regression model to obtain a prediction result. The method comprises the steps of obtaining a coil parameter prediction model, constructing an integrated learning correction model based on the coil parameter prediction model, predicting coil geometric parameters to be predicted based on the coil parameter prediction model and the integrated learning correction model, and obtaining coil electrical parameters including alternating-current resistance, self-inductance and mutual inductance. According to the method, the coil parameters under different working conditions are efficiently predicted, the time consumption of traditional finite element simulation is reduced, the accuracy of coil alternating current resistance, self inductance and mutual inductance obtained through prediction is more effectively ensured, and therefore the coil parameters of the wireless power transmission system are accurately and efficiently predicted.

An inductor has a main magnet core, a coil mounted around the main magnet core, and a residual magnet encapsulating the main magnet core and partially encapsulating the coil. The main magnet core is made of a main magnet core powder containing amorphous iron base material and nickel base material powders. The residual magnet is made of a residual magnet powder containing a main magnet powder and a soft magnet powder including an iron-silicon-chromium alloy powder and a carbonyl iron powder. Thus, through a low-loss feature of the amorphous iron base material and nickel base material powders, a loss of the main magnet core is reduced. Furthermore, a magnetic permeability of the residual magnet matches a magnetic permeability of the main magnet core. A magnetic leakage is further avoided, and the alternating current resistance is reduced. A quality factor and a conversion efficiency are enhanced.

The invention discloses a thermal evaluation method and device for a double-spliced cable line laid in a pulling and jacking pipe, and the method comprises the steps: obtaining the first AC resistance of a core wire and the second AC resistance of a metal sheath of each cable at the initial temperature of the core wire; actual transmission capacity data and thermal resistance parameters are obtained; obtaining core wire loss and circulating current loss of each cable; obtaining the mutual heating temperature rise of the kth cable to the pth cable; obtaining the self-heating temperature rise of each cable; obtaining a core wire calculation temperature of each cable according to the mutual heating temperature rise, the self-heating temperature rise and the environment boundary temperature of each cable; acquiring a temperature difference value between the core wire initial temperature and the core wire calculation temperature of at least one cable; when the temperature difference value is smaller than or equal to a preset difference value and each core wire calculation temperature is smaller than a first preset temperature, determining the core wire calculation temperature of each cable as a core wire steady-state temperature of each cable; otherwise, determining the core wire calculation temperature of each cable as the core wire initial temperature of each cable; and returning to execute the steps.

This diagnosis device may comprise: a direct current device for discharging a battery cell with a fixed current for a predetermined measurement period so as to measure a direct current resistance of the battery cell; an alternating current device for supplying an alternating current to the battery cell so as to measure an alternating current resistance of the battery cell; a voltage measurement device for measuring a voltage of the battery cell; a memory for storing, for each of a plurality of diagnosis periods, each of a plurality of resistance pairs in which the direct current resistance and the alternating current resistance are matched; and a diagnosis control circuit for calculating the direct current resistance and the alternating current resistance according to the voltage of the battery cell for each of the plurality of diagnosis periods, acquiring a graph for the plurality of resistance pairs on the basis of a plurality of dots corresponding to the plurality of resistance pairs, and determining a normal resistance range based on the graph on the basis of the graph and the uppermost dot and the lowermost dot, among the plurality of dots, that are farthest from the graph.

The application provides a power ferrite material, a preparation method thereof and an automobile electronic product, and the power ferrite material is composed of a base material and an additive; the base material comprises, in terms of mole percentage, Fe2O3 52.95-53.25 mol%; MnO 36.55-37.05 mol%; and ZnO 9.7-10.5 mol%; and the additive comprises, in terms of total mass of the base material being 100%, CaCO3 0.13-0.18%; and Co2O3 0.2-0.33%. The composition of the power ferrite material is regulated, so that the alternating current resistance (ACR) value of the power ferrite material under the condition of 25 DEG C, 200 kHz and 0.5 V is reduced, and thus the UF40 product is facilitated to be applied in the automobile field.

The invention discloses an AC resistance analytical calculation method suitable for a double-layer orthogonal DD coil, and the method comprises the steps: firstly selecting the double-layer orthogonal DD coil, and determining a conduction effect correction coefficient and a proximity effect correction coefficient; then calculating conduction resistance and internal proximity resistance of the double-layer orthogonal DD coil; mirror image processing is carried out on the double-layer orthogonal DD coil, the double-layer orthogonal DD coil and a mirror image of the double-layer orthogonal DD coil are respectively divided into a plurality of long straight conductor sections, and each conductor section is further divided into a plurality of sub-sections; for each sub-segment, calculating the external magnetic field intensity, then calculating the external proximity effect resistance of the double-layer orthogonal DD coil sub-segment according to the external magnetic field intensity and a proximity effect correction coefficient, and summing to obtain the external proximity resistance; and finally, adding the conduction resistance, the internal adjacent resistance and the external adjacent resistance to obtain the total alternating-current resistance of the double-layer orthogonal DD coil, so that the alternating-current resistance of the double-layer orthogonal DD coil can be quickly and effectively calculated.

To provide: a non-aqueous electrolyte storage element having a large initial discharge capacity, a high capacity retention rate after charge-discharge cycling, and a low alternating-current resistance after charge-discharge cycling; and a method for manufacturing such a non-aqueous electrolyte storage element.SOLUTION: A non-aqueous electrolyte storage element according to one aspect of the present invention includes a positive electrode containing a sulfur-based active material, and a non-aqueous electrolyte containing a non-aqueous solvent, where the non-aqueous solvent contains a cyclic carbonate and a fluorinated carboxylic acid ester, and the content of the fluorinated carboxylic acid ester in the non-aqueous solvent is 10 vol.% or more and 70 vol.% or less.SELECTED DRAWING: Figure 1

The invention provides a cable alternating current resistance measuring method and device and electronic equipment, and relates to the technical field of electric power measurement. The method comprises the steps that a current sampling signal and a voltage sampling signal of a cable are obtained, the current sampling signal is obtained by connecting a sampling resistor in series on the secondary side of a current transformer and measuring the voltage drop of the sampling resistor, and the voltage sampling signal is obtained by symmetrically arranging sampling points at the two ends of the cable and synchronously collecting the two ends; converting the current sampling signal and the voltage sampling signal into digital signal flows, wherein the digital signal flows comprise a current signal flow and a voltage signal flow; the digital signal flow is input into a trapezoidal integral resistance calculation model, the alternating current resistance of the cable is obtained, and the trapezoidal integral resistance calculation model is a model which is constructed based on a trapezoidal integral method and used for calculating the alternating current resistance based on the current signal flow and the voltage signal flow in the digital signal flow. According to the invention, the measurement accuracy and flexibility of the cable AC resistance are improved.

The embodiment of the invention provides a large-section cable actual AC resistance measurement method and device, a medium and a product. The method comprises the following steps: determining the total inductance in an actual alternating current resistance measurement loop through a pre-experiment; according to the total inductance, determining a compensation capacitor connected to the actual AC resistance measurement loop; adjusting the compensation capacitor through a phase difference constraint mechanism and a power supply maximum power constraint mechanism to obtain an adjusted compensation capacitor; and when the adjusted compensation capacitance enables the phase difference between the voltage and the current on the large-section cable to be within an allowable phase deviation threshold range, measuring the actual alternating-current resistance of the large-section cable by adopting a voltage and current phase method to obtain the actual alternating-current resistance. The method is used for achieving the effect of accurately measuring the actual alternating-current resistance of the large-section cable.

The invention relates to the technical field of wireless power transmission, and discloses a low-loss PCB Litz planar spiral coil and a design method thereof. According to the coil, through a three-dimensional magnetic field balance layout of region division, multi-strand parallel connection (N), circumferential segmentation (M) and interlayer rotation (theta), homogenization of current in the thickness direction and the circumferential direction is achieved, and skin and proximity effects are remarkably inhibited. The AC loss is reduced, and the quality factor is improved. The design method comprises the steps of S1, coupling coefficient optimization; s2, optimizing magnetic loss; s3, selecting the number of strands and the number of segments of a conductor; and S4, performance verification. An example shows that under the working frequency of 150 kHz, compared with a traditional PCB coil, the alternating current resistance of the structure is lower, the quality factor is higher, and the coil is suitable for a compact high-performance wireless power transmission system.

The aim is to reduce AC resistance. In the AC signal line (2) of the multilayer substrate (100), multiple signal lines (21-23) are electrically connected by multiple connecting conductors that pass through one of multiple insulating layers (11-13) in the thickness direction (D1) of the multilayer substrate (1). The multiple signal lines (21-23) include a first signal line (21) that is closest to the first main surface (101) of the multilayer substrate (1) in the thickness direction (D1), a second signal line (23) that is closest to the second main surface (102) of the multilayer substrate (1) in the thickness direction (D1), and a third signal line (22) that is located between the first signal line (21) and the second signal line (23) in the thickness direction (D1) of the multilayer substrate (1). In the thickness direction (D1) of the laminated substrate (1), at least one of the thickness (T21) of the first signal line (21) and the thickness (T23) of the second signal line (23) is thicker than the thickness (T22) of the third signal line (22).