628 results about "Coupling inductor" patented technology

The invention relates to the technical field of cable measurement, and discloses a cable length measurement method based on coupling inductance and TDC, and the method comprises the following steps: test pulse reset, channel sequential gating, threshold dynamic adjustment, TDC state configuration, channel stable waiting, test pulse generation, time difference precise capture, validity intelligent judgment and data sorting optimization. According to the cable length measurement method based on the coupling inductor and the TDC, the coupling inductor is adopted to replace an FPGA to generate narrow pulses, the TDC is adopted to replace a high-speed ADC, and the hardware cost is reduced by 60%-80%; by optimizing the pulse generation and echo detection circuit, the measurement blind area is reduced to 0.5 m, the short-distance cable measurement requirement is met, and the device has the advantage of being small in measurement blind area.

The invention relates to the technical field of artificial intelligence, and discloses a charging pile operation state management method and system based on artificial intelligence, and the method comprises the steps: constructing a dual-input single-output DC-DC conversion control circuit structure based on an input power supply, a main power switching device, a three-winding coupling inductor and a switched capacitor unit; calculating a switch time sequence control signal based on a double-input single-output DC-DC conversion control circuit structure; detecting the running state of the charging pile to obtain a multi-dimensional quantized data set, and performing data coding to obtain a standard data information sequence; performing multi-dimensional feature value extraction and fault position identification on the standard data information sequence to obtain a fault positioning result; according to the fault positioning result and the switch time sequence control signal, closed-loop regulation control is carried out on the power device conduction time sequence and the clamping circuit parameters, stable direct-current output voltage is obtained, the voltage conversion efficiency is improved, the accuracy of fault recognition is improved, and the misjudgment rate is reduced.

The invention provides a tunable circuit resonator based on a nonlinear high-order topological insulator. The tunable circuit resonator comprises a coupling inductor L1, a coupling inductor L2, a coupling capacitor C1, a coupling capacitor C2, a first subunit and a second subunit, the plurality of coupling inductors L1, the plurality of coupling inductors L2, the plurality of coupling capacitors C1, the plurality of coupling capacitors C2, the plurality of first subunits and the plurality of second subunits are periodically arranged to form a tunable circuit resonator; the capacitance value of the coupling capacitor C1 is smaller than that of the coupling capacitor C2, and the inductance value of the coupling inductor L1 is larger than that of the coupling inductor L2. Structural construction of the tunable circuit resonator is carried out based on the quadrupole moment topological insulator model, adjustability of the circuit resonator is achieved, and the circuit resonator adapts to constantly changing working conditions; the robustness of the tunable circuit resonator is improved by using the robustness of the topological angular state of the model, and the method has certain tolerance to circuit element errors; and the manufacturing cost of the tunable circuit resonator is further reduced.

The invention discloses an ultra-wideband low-noise amplifier based on a double-coupling structure, relates to the field of electronic devices, and is used for solving the problems of large occupied area and large noise coefficient of a distributed amplifier in the prior art. Comprising a broadband input matching network acting on a first-stage circuit, a transconductance enhancement coupling structure and an active bias structure; the parallel RC negative feedback structure and the series-parallel coupling inductance peaking structure act on the second-stage circuit; the transconductance enhancement coupling structure at least comprises a first transistor, a first microstrip line connected with a source electrode of the first transistor and a second microstrip line connected with a drain electrode of the first transistor, and the first microstrip line and the second microstrip line are mutually coupled. Part of drain electrode current signals are coupled to the source electrode to be secondarily amplified, the high-frequency gain of the first-stage circuit is effectively improved, post-stage noise can be restrained, meanwhile, minimum noise matching under high frequency is carried out through the source electrode degeneration inductor and the broadband input matching network, and the noise performance is excellent; and the area can be saved.

The present invention belongs to the technical field of parameter identification for permanent-magnet synchronous motors. Disclosed are a parameter identification method and apparatus for a permanent-magnet synchronous motor, and a storage medium and a device. The method comprises: using a variable step-size feedback neural network algorithm to solve a voltage equation and a d-q axis current discrete state equation, which take cross-coupled inductance into consideration, of a permanent-magnet synchronous motor in a dq coordinate system, so as to obtain intermediate parameters generated in the process of constructing the d-q axis current discrete state equation; and performing calculation on the basis of the intermediate parameters, so as to obtain the stator resistance, the d-axis inductance, the q-axis inductance, the cross-coupled inductance and the permanent-magnet flux linkage of the permanent-magnet synchronous motor, and thereby completing parameter identification. The present invention takes cross-coupled inductance into consideration and uses the variable step-size feedback neural network algorithm, such that the computational load is extremely small, the degree of complexity is reduced, rapid and effective identification can be realized, and errors can be reduced; in different convergence time periods, the algorithm adjusts the step size on the basis of the magnitude of steady-state errors, such that identification results approach stable values more quickly, thereby improving the speed and stability of convergence.

The invention relates to a three-winding coupling inductor bipolar output high-gain DC-DC converter, which is characterized in that a coupling inductor and switched capacitor boosting technology is introduced into a three-level Boost bipolar output converter, and bipolar output voltages Uo1 and Uo2 are controlled by adjusting the turn ratio of the coupling inductor and the duty ratio of a switch; and the input and output power is changed by adjusting the resistance value of the output load. The DC-DC converter is low in input current ripple, high in voltage gain and low in switching tube voltage stress, and bipolar output voltage can be flexibly adjusted through the duty ratio and the coupling inductor turn ratio.

Provided in the present invention is a magnetic element integrated with a coupled inductor and a transformer. The magnetic element comprises an upper magnetic core and a lower magnetic core, which are arranged in a fitted manner, wherein the lower magnetic core comprises a magnetic cover, M coupled inductor magnetic columns, N transformer magnetic columns and Q side columns, M, N and Q all being integers greater than or equal to 1; the coupled inductor magnetic columns are used for the winding of coupled inductor windings; the transformer magnetic columns are used for the winding of transformer primary windings and transformer secondary windings; the M coupled inductor magnetic columns and the N transformer magnetic columns are arranged in parallel on the magnetic cover; and the Q side columns are arranged on the magnetic cover. By means of the present invention, a magnetic element integrated with a coupled inductor and a transformer is used, so that the volume and weight of the magnetic element can be reduced, the efficiency and power density of a converter can be improved, and the costs of the converter can be reduced.

The present invention discloses a multi-phase converter circuit, which includes at least one two-phase converter circuit coupled between a first voltage and a second voltage, and employs switching control of at least one capacitor and at least one coupled inductor, with alternated charging phase and discharging phase, to achieve power conversion between the first voltage and the second voltage.

A method for reducing magnetic core losses in a multi-phase switching power converter including a coupled inductor. The method includes (a) generating a plurality of periodic voltage waveforms, each periodic voltage waveform being applied across a respective winding of a plurality of windings of the coupled inductor, and (b) distributing flow of changing magnetic flux in a magnetic core of the coupled inductor by controlling phase shift among the plurality of periodic voltage waveforms such that at least two consecutive peak magnitude portions of the plurality of periodic voltage waveforms are not applied to respective windings of the plurality of windings of the coupled inductor that are immediately physically adjacent to each other.

The invention discloses a dual-LLC resonant converter based on a modulatable coupling inductor. The dual-LLC resonant converter aims to meet the wide-gain application requirements of an LLC converter in the high-efficiency and high-gain power supply application fields such as a data center, energy storage conversion, direct-current adaptation and photovoltaic application. According to the invention, two connected transformers are adopted to divide a resonant cavity into two parts to form two LLC units, series connection or parallel connection application of double LLC can be realized through different switch sequences, two common resonant inductors are replaced by coupling inductors, and split capacitors are adopted as input and output filters. For the two working modes, the resonant frequency can be configured at will, and the equivalent inductance value of the coupling inductor can be changed by changing the switching sequence, thereby changing the resonant cavity parameters in different modes, and enabling the resonant cavity parameters to meet the requirements of different requirements of the converter under light load / heavy load for the parameters. Therefore, the full-range efficiency of the converter can be improved on the basis that the working modes are switched according to light and heavy load conditions to achieve wide gain.

A magnetic inductor core forms a three-dimensional figure eight pattern. An upper member of the core forms an upper half of the figure eight pattern, a lower member of the core forms a lower half of the figure eight pattern, and central portions of the upper and lower members are separated from one another in a depth dimension by a main gap that passes transversely through the core from left to right sides of the figure eight pattern. The upper and lower members are joined at top and bottom sides of the figure eight pattern by core members that extend in the depth dimension between the upper and lower members. Coupled inductor components are be formed using the core such that magnetic flux associated with electrical current flowing in the inductor windings follows the figure eight pattern of the core in opposite directions, producing a flux cancelation effect inside the core.

The invention provides a self-adaptive noise source impedance adjustable EMI filtering device and method, and belongs to the field of electromagnetic interference processing. The device comprises an EMI filter, a coupling inductor, a balance winding, a balance impedance, a balance impedance adjusting module and a self-adaptive control module; the coupling inductor, the EMI filter and the balance winding form a six-port network, and the self-adaptive control module is used for converting the six-port network into a four-port network according to scattering parameters of the six-port network, constructing a mixed-mode common-mode parameter matrix, obtaining an initial common-mode reflection coefficient according to the mixed-mode common-mode parameter matrix, and outputting the initial common-mode reflection coefficient. And based on the initial common-mode reflection coefficient and a preset target reflection coefficient, obtaining a balance impedance adjustment direction and a balance impedance adjustment amplitude which meet preset requirements so as to control an impedance adjustment module to dynamically adjust the balance impedance. According to the invention, the balance impedance is optimized and adjusted in real time to cope with the dynamic change working condition of the circuit, and the EMI filtering performance reliability is improved.

The invention discloses a transformer type differential series resonant cavity, a differential series resonant oscillator, a chip and equipment, the resonant cavity comprises a two-port transformer and a variable capacitance module, the two-port transformer comprises an inductor LP1, an inductor LP2, an inductor LS1 and an inductor LS2 which are mutually coupled, and the variable capacitance module comprises a variable capacitor CP and a variable capacitor CS; one end of the inductor LP1 is connected with the first port, and the other end is connected with the variable capacitor CP; one end of the inductor LP2 is connected with the second port, and the other end is connected with the variable capacitor CP; one end of the inductor LS1 and one end of the inductor LS2 are connected with the third port and the fourth port respectively, and the other end of the inductor LS1 and the other end of the inductor LS2 are connected with each other; two ends of the variable capacitor CS are respectively connected with the third port and the fourth port; a plurality of pole frequencies of the voltage gain function AV are set to be equal such that AV at the zero phase increases. According to the invention, the problem that a series resonant oscillator cannot realize pure differential output in the current pure CMOS process is solved.

The invention provides a bidirectional series hybrid DC circuit breaker and a control method thereof, and relates to the technical field of power equipment. The bidirectional series hybrid DC circuit breaker comprises a main branch, a charging circuit and a voltage injection unit. The main branch comprises a mechanical switch, a current-limiting inductor, a first coupling inductor and a secondary winding; the voltage injection unit comprises a capacitor, a first H-bridge unit, a second H-bridge unit, a first coupling inductor primary winding and a second coupling inductor; and one end of the charging circuit is connected with the main branch, and the other end is connected with the voltage injection unit for charging the capacitor. In addition, the invention also provides a control method of the bidirectional series hybrid DC circuit breaker. According to the bidirectional series connection type hybrid direct current circuit breaker provided by the invention, the capacitor is charged by recovering the residual exciting current in the coupling inductor, and the voltage of the capacitor and the exciting current of the coupling inductor can be recovered to the initial state, so that self-weight starting is realized, and fault current can be bidirectionally broken.

The bidirectional fast circuit breaker comprises a through-flow branch, a commutation module, a current limiting module, a buffer branch and an energy consumption branch, the through-flow branch comprises a fast mechanical switch FMS, a coupling inductor L2, a power electronic switch S1 and a power electronic switch S2, the fast mechanical switch FMS and the coupling inductor L2 are connected in series, and the power electronic switch S1 and the power electronic switch S2 are reversely connected in series. A diode D1 and a diode D2 are respectively connected in parallel with a power electronic switch S1 and a power electronic switch S2, a capacitor C0 is connected in series with the power electronic switch S2, a resistor R0 is connected in parallel with the capacitor C0, a current-limiting inductor L1 is connected in series with a coupling inductor L2, a thyristor T1 and a thyristor T2 are reversely connected in parallel and then are connected in series with a resistor R so as to be connected in parallel with the two ends of the current-limiting inductor L1, and a buffer branch is connected in parallel with the two ends of a through-current branch. The buffer branch comprises a resistor R1 and a capacitor C1 which are connected in series, and the energy consumption branch is connected to the two ends of the through-current branch in parallel.

A thin coupling inductor, a manufacturing method thereof and a power supply module are provided. The thin coupling inductor comprises a first assembly, a first magnetic core and a second magnetic core; the first assembly comprises a first winding main body, a second winding main body and a third magnetic core combination; and the first magnetic core and the second magnetic core have a thin-layer composite structure. The manufacturing method comprises the steps that a third magnetic core combination and a winding main body are arranged in the frame, and the PP material is pressed to form a stack body. The power supply module comprises a thin coupling inductor, a first switching element, a second switching element, an input capacitor and an output capacitor. The control signals of the first switching element and the second switching element are 180 degrees out of phase.

A voltage regulator includes a first portion with a first converter phase and a second portion with second and third converter phases, and a compensation inductor. The first converter phase receives an input voltage and provides an output voltage through a first inductor. The second converter phase receives the input voltage and provides the output voltage through a first primary winding of a first coupled inductor. The first coupled inductor includes a first secondary winding magnetically coupled to the first primary winding. The third converter phase receives the input voltage and provides the output voltage through a second primary winding of a second coupled inductor. The second coupled inductor includes a second secondary winding magnetically coupled to the second primary winding. The compensation inductor, first secondary winding, and of the second secondary winding are coupled in series between a ground plane.

The invention discloses a voltage-controlled oscillator with a wide frequency regulation range, relates to the technical field of radio frequency, and aims to solve the problems of narrow and discontinuous output frequency tuning range of an oscillator in the prior art. The voltage-controlled oscillator comprises a passive topology module, an active negative resistance module, a frequency regulation module and a mode switching module, the passive topology module comprises a plurality of mutually coupled inductors; the plurality of inductors are coupled together and provide a required impedance peak; the plurality of inductors comprise a splayed inductance coil, a first annular inductance coil and a second annular inductance coil; the inverted V-shaped inductance coil comprises a first inductance coil, a second inductance coil and a public inductance coil; the frequency adjusting module is used for adjusting the corresponding frequency of the impedance peak; the active negative resistance module is used for providing signal gain for the passive topology module to meet oscillation conditions, and the mode switching module is used for switching working modes of the oscillator. The oscillator has four continuous working frequency bands, and the tuning range of the output frequency is wider.

The utility model relates to a power supply circuit, a power supply chip and electronic equipment. The power supply circuit comprises a voltage conversion circuit which comprises an input end, an output end and a plurality of inductors, the input end is used for being coupled with a power supply, the output end is used for being coupled with a display driving circuit, and the voltage conversion circuit is used for converting voltage of the power supply and outputting the converted voltage to the display driving circuit to supply power to the display driving circuit; the switching circuit is coupled with at least one inductor, the switching circuit is coupled with the inductor in a one-end coupling or two-end coupling mode, the switching circuit is coupled between the input end and the output end, and the switching circuit is used for controlling the coupled inductor to be connected or disconnected between the power supply and the display driving circuit. Since the inductance affects the efficiency of the power supply circuit when the power supply current required by the display driving circuit is different, the inductance of the power supply circuit is adjusted by changing the number of the inductance between the power supply and the display driving circuit through the switching circuit, thereby improving the efficiency of the power supply circuit.

The invention belongs to the technical field of converter control, and discloses a photovoltaic power generation-battery energy storage converter with a reconfigurable function, which comprises eight switching tubes and a coupling inductor. The design of the cascaded double H bridges enables the sub-modules to flexibly work in series, parallel, boost or bypass modes, the'short plate effect 'caused by connection aging, local shadow or defects and the like of a traditional long photovoltaic string is improved, all energy conversion links of the method are integrated in one converter, and the loss during energy conversion is reduced. The invention further discloses a control method of the converter, load constant-voltage control and photovoltaic array maximum power tracking control are decoupled according to the overall thought, the harmonic component output by a system is reduced through a multi-level control strategy, and the electric energy quality is improved; the coupling inductors are additionally arranged among the modules, so that the maximum power tracking of each photovoltaic array can be realized without the aid of a traditional boost circuit, the power generation efficiency of the system is improved, and the battery pack can effectively realize power balance.

An annular-shaped spacer member is attached in a split manner in a circumferential direction of a winding shaft portion of a bobbin through which middle leg portions are inserted. The spacer member includes: a cylindrical portion on which an annular third core is placed; and flange portions provided at both ends thereof. The third core is split in the circumferential direction and mounted on the outer circumferential portion of the cylindrical portion of the spacer member in a state in which, of elements of the shape of the third core and the material characteristic of the third core, the magnitude of at least one of the elements is set so that a desired leakage inductance value is generated.

The invention discloses an on-chip active reconfigurable filter passband flatness optimization method and circuit, and belongs to the field of integrated circuits and wireless communication. The filter comprises a coupling element, negative resistance compensation units are connected to the two ends of the coupling element and connected with the coupling element in parallel, and the coupling element comprises a coupling inductor or a coupling capacitor. The invention provides a passband flatness method based on active coupling compensation by deeply analyzing the passband flatness distortion reason of the on-chip coupling filter, and designs a detailed controllable negative resistance unit to compensate the coupling (inductive coupling) loss of the base transformer, thereby greatly reducing the in-band insertion loss variation of the filter, and improving the filter performance. And the amplitude consistency of the signal after passing through the filter is improved.

The invention discloses a method for measuring and calculating parameters of a same-tower double-circuit alternating-current transmission line under high induced voltage. The method comprises the following steps: dividing the same-tower double-circuit transmission line into three groups of wiring modes; measuring the short-circuit impedance in each wiring mode and the line impedance in a mode that the tail end of the line is grounded through impedance; calculating the characteristic impedance and the propagation coefficient in the corresponding wiring mode by using the impedance measurement result of the line through impedance grounding and the line short-circuit impedance measurement result in each wiring mode, and further calculating the distribution impedance and the distribution admittance in the corresponding mode; and finally, calculating the resistance, inductance and ground capacitance of each phase lead of the same-tower double-circuit line, the inter-phase coupling capacitance and inter-phase coupling inductance of the single-circuit line, and the coupling capacitance and coupling inductance between each phase lead of the double-circuit line through the distributed impedance and distributed admittance in each wiring mode and simultaneous equations. Through the method, the induced voltage on the measured circuit can be effectively reduced, and meanwhile accurate measurement can be achieved.

The invention provides a three-phase-in-one type parallel multi-level inverter and a motor simulator, the three-phase-in-one type parallel multi-level inverter comprises three phases of inverter circuits, each phase of inverter circuit comprises a plurality of bridge arm branches which are connected in parallel with a direct current bus power supply, the number of the bridge arm branches is equal to that of the inverter circuits, and each bridge arm branch comprises two switching devices which are connected in series; the number of the three-phase one-in-one type magnetic rings is equal to that of the bridge arm branches in any phase of inverter circuit, and each three-phase one-in-one type magnetic ring is formed by spirally winding three wires on the choking coil, one end of each of three wires of each three-phase-in-one magnetic ring is connected with the midpoint of one bridge arm branch in one phase inverter circuit, and the other end of each of the three wires forms a current output end of a corresponding phase according to an in-phase connection mode. According to the inverter provided by the invention, the cascade coupling inductor topological structure of the existing motor simulator is changed, and the problem that the high-frequency circulating current is increased along with the increase of the number of the branches is effectively solved.

The invention relates to the technical field of switching power supplies, in particular to an interleaved parallel coupling inductor boost converter, a control method, a controller and a medium, and aims to solve the technical problem of how to realize a converter which better meets the requirements of a space power supply system and has stable and reliable performance. In order to achieve the purpose, the converter comprises an interleaved parallel branch and a filter inductor. The interleaved parallel branch comprises a plurality of boost bridge arms which are connected in parallel and a plurality of energy storage inductors, each boost bridge arm comprises two power electronic devices which are connected in series, and a bridge arm midpoint of each boost bridge arm is connected with a second end of one energy storage inductor; the first ends of the plurality of energy storage inductors are connected with each other and then are connected with the first end of the voltage input end. According to the converter, the interleaving parallel technology is introduced, the energy storage inductor and the filter inductor are coupled, input and output current ripples of the converter can be effectively reduced, the current stress of a power electronic device is reduced, the switching loss of the power electronic device is reduced, and the transient characteristic of the converter is improved.

A carrier reconstruction method to eliminate DC and low-frequency circulating currents in multi-parallel converters is disclosed, addressing the issue of DC and low-frequency circulating currents introduced by traditional carrier phase shift methods. By alternately setting complementary initial phase angles of carriers, this reconstruction method achieves balanced and symmetrical carriers within two periods, thereby eliminating the DC and low-frequency circulating currents caused by asymmetric carriers. The reconstructed carrier method provides a universal solution. It can solve all DC and low-frequency circulating currents issues based on traditional phase-shift carrier modulation strategies. Additionally, the carrier reconstruction method prevents core saturation in common mode inductors or coupled inductors, simplifying the design complexity of these inductors. This disclosure not only reduces inductor size and improves inductor efficiency but also enhances the overall performance of multi-parallel converters.

The invention relates to the technical field of power electronics, in particular to a portable load adaptive bidirectional charging and discharging circuit module. The module comprises a battery and a load port. The first half-bridge is composed of a gallium nitride switch, and the second half-bridge is composed of a silicon-based field effect transistor; a main winding of the coupling inductor is connected with two half-bridge switch nodes, and a secondary winding outputs induced voltage to provide bias power supply through rectification and filtering; an auxiliary resonant branch comprising an auxiliary switch and a resonant capacitor is connected in parallel to two ends of the switch, and the starting time sequence of the auxiliary switch is ahead of the first gallium nitride switch; the control unit determines a direct current and a high-frequency ripple component according to the shunt resistor and the secondary winding signal, and generates a PWM signal in combination with the port voltage to control the on and off of all the switches. According to the scheme of the invention, self-bias power supply and high-precision composite current detection are realized, the switching loss is reduced, and the energy conversion efficiency is improved.

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.

A power converter includes a first bridge arm including a first switch and a second switch connected in series such that the first switch is connected to the second switch to define a first connection point, a second bridge arm including a third switch and a fourth switch connected in series such that the third switch is connected to the fourth switch to define a second connection point, a first LC resonant cavity connected between the first connection point and the second connection point, a first rectifier and a second rectifier including switches, and a coupling inductance connected to the second switch, the third switch, the first rectifier and the second rectifier respectively, such that a center tap of the coupling inductance is connected to a load.

The invention discloses a wide-gain narrow-band bipolar LLC converter based on a coupling inductor and a control method. The wide-gain narrow-band bipolar LLC converter based on the coupling inductor comprises a first half-bridge module, a second half-bridge module, the coupling inductor, a first transformer Tr1, a second transformer Tr2 and a variable rectifier bridge. The invention aims to solve the problem of narrow voltage gain range of the existing bipolar direct-current converter for the charging station. By adopting the coupling inductor and the dual-mode control method, a wide voltage gain range can be realized in a narrow switching frequency range, the method can realize more than 6 times of voltage gain in a switching frequency range less than 2 times, and the method has the characteristics of simple topological structure and easiness in control.