479 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 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 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.

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.

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 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 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 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.

The invention relates to a coupled inductor current-limiting type hybrid direct-current circuit breaker topology and a working method. The coupled inductor current-limiting type hybrid direct-current circuit breaker comprises a current-carrying part and a breaking part, the current-carrying part is formed by connecting an ultra-fast mechanical switch UFD and a load change-over switch LCS in series, the breaking part comprises a bridge circuit, a first branch circuit, a second branch circuit, a third branch circuit, a fourth branch circuit, a fifth branch circuit and a sixth branch circuit, the fourth branch circuit is formed by connecting a thyristor, a coupling inductor and a primary side inductor in series to form a current-limiting branch circuit, and the fifth branch circuit is formed by connecting a secondary side inductor and a secondary side inductor. The sixth branch is formed by connecting a secondary side inductor of a coupling inductor with a thyristor in series and then connecting the secondary side inductor with a capacitor in parallel; the current limiting of the fault current is realized through the fourth branch, the fault breaking of the primary side inductor of the coupling inductor of the fourth branch is completed through the coupling effect of the secondary side inductor of the coupling inductor of the sixth branch, the peak value of the fault current is obviously reduced, and the breaking time is obviously shortened; the circuit breaker can quickly respond to faults of three working modes of current limiting breaking, reclosing and small current breaking; and the breaking part of the circuit breaker adopts the thyristors instead of the IGBTs, so that the cost of the circuit breaker is reduced.

The invention discloses a three-phase interleaving parallel non-contact electricity taking circuit which is composed of a power driving circuit and a sampling circuit and realizes closed-loop control through a control circuit. The power driving circuit adopts a three-phase interleaving parallel converter topology, three bidirectional half-bridge converters are interleaved in parallel, the conduction time of adjacent bridge arm switch tubes is the same, the phase difference is 120 degrees, and current ripples are effectively reduced. The sampling circuit collects voltage, current and temperature signals in real time, the control circuit dynamically adjusts the duty ratio and phase of each phase based on a digital current sharing algorithm, and current sharing control and phase number switching in an abnormal state are achieved. Obtaining the coupling coefficient gt of the magnetic coupling inductance coil at the electric appliance side; 0.9, the rated output power is 3KW. The single-body output power reaches 10KW, the efficiency is improved to 94%, the ripple current is reduced to 5%, and the power supply is suitable for a complex alternating current power supply scene.

In accordance with some embodiments of the present disclosure, a current sensing circuit includes a coupled inductor including a first winding and a second winding, a first resistor, a first capacitor including a first side coupled in series with the first resistor, where the first resistor and the first capacitor are coupled in parallel with the first winding, and a second side coupled to the outputs of the first and second windings, a second resistor a second capacitor including a first side coupled in series with the second resistor, where the second resistor and the second capacitor are coupled in parallel with the second winding, and a second side coupled to the outputs of the first and second windings, and a third capacitor including a first side coupled between the first resistor and the first capacitor, and a second side coupled between the second resistor and the second capacitor. A first voltage across the first capacitor is indicative of a first current flowing through the first winding, and a second voltage across the second capacitor is indicative of a second current flowing through the second winding.

The invention discloses a trapezoidal wave current soft switching method of an interleaving DC-DC converter, which is used for a two-phase interleaving bidirectional DC-DC converter based on a coupling inductor and a multi-phase interleaving converter thereof, and is characterized in that an inductive current adopts a trapezoidal wave mode, so that the converter works in an approximate critical conduction mode; a fixed switching frequency control or hybrid control method is adopted, so that the device can work in a Buck mode and can also work in a Boost mode. The method for realizing the soft switching is characterized in that the parasitic capacitance or the external resonant capacitor of the switching tube is discharged to be zero under the resonance action of the inductor and the capacitor in the dead zone time when the upper bridge arm switch and the lower bridge arm switch are alternately switched on, so that the zero-voltage switching-on of all the switching tubes is realized. And each phase current sharing control is adopted in the multi-phase interleaving parallel topological structure. According to the invention, the problems of large current peak value and high turn-off loss of a traditional triangular wave current mode are solved, the output ripple current is reduced, a soft switching method is provided, the switching loss is reduced, and the conversion efficiency of the converter is improved.

The invention provides a partial power processing type ultra-high voltage conversion ratio switched capacitor converter topological structure and a control method thereof, and the structure comprises a high-voltage side port which is connected with a high-voltage power supply or a load; the high-voltage side filter is used for filtering high-voltage side power input or load output; the magnetic element unit comprises a two-winding and multi-winding transformer, an autotransformer, a center tapped transformer and a coupling inductor; the switched capacitor unit comprises at least two switches and one or more capacitors, and the number of the capacitors is n; the system further comprises a high-frequency rectification inverter and a low-voltage side filter, and the low-voltage side filter is used for filtering low-voltage side power input or load output. According to the technical scheme, the switched capacitor unit and the magnetic element unit are flexibly configured, and electric energy conversion with various high voltage conversion ratios can be realized only by using open-loop control.

The invention provides a digital isolator with both high-speed communication and high common-mode transient immunity. The digital isolator comprises a transmitter, a coupling inductor and a receiver, the transmitter comprises an oscillator, a modulation capacitor assembly and a common-mode transient immunity enhancement module; the oscillator is configured to receive a data signal and generate a first differential signal based on the data signal; the modulation capacitor assembly is configured to modulate a code element 0 into a first frequency and modulate a code element 1 into a second frequency; the common-mode transient immunity enhancement module is configured to determine a bias control signal according to the first differential signal; the receiver is configured to receive the second differential signal and obtain a square wave signal based on the second differential signal; obtaining a triangular wave signal based on the square wave signal; obtaining the maximum value of a triangular wave signal according to the falling edge signal of the square wave signal; and obtaining a target data signal based on the maximum value, so as to solve the problem of low communication and common-mode transient immunity performance of the existing digital isolator.

The invention relates to the technical field of microwave radio frequency, in particular to a third-order tuning low-pass filter. Comprising an input coupling inductor L1, a first interstage coupling inductor L2, a second interstage coupling inductor L3, an output coupling inductor L4, a first tuning capacitor C1, a second tuning capacitor C2 and a third tuning capacitor C3, the first tuning capacitor C1, the second tuning capacitor C2 and the third tuning capacitor C3 are all adjustable capacitor arrays, and each tunable capacitor is composed of a plurality of capacitors and PIN diodes. By changing the control signal into a high level or a low level, the conduction or cut-off state of the PIN diode is changed, and then the equivalent capacitance value of the whole tuning capacitor is changed, so that the frequency of the filter is correspondingly changed, and different working frequency bands are obtained. The three-order tuning low-pass filter can effectively restrain third and more harmonic waves at the rear ends of the frequency hopping filter and the power amplifier, and the cut-off frequency of the three-order tuning low-pass filter can change along with control signals.

An apparatus for wireless communications includes a power amplifier, a low-noise amplifier, a power detector, and a transformer. The transformer includes a first inductor coupled to an output of the power amplifier, and a second inductor coupled to an antenna, wherein the second inductor is magnetically coupled with the first inductor. The transformer also includes a third inductor coupled to an input of the low-noise amplifier, wherein the third inductor is magnetically coupled with the second inductor. The transformer also includes a coupling inductor coupled to an input of the power detector, wherein the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.

The invention relates to the technical field of magnetic devices, and discloses a coupling inductor adjusting method, a coupling inductor and electronic equipment, the coupling inductor comprises magnetic cores, the two magnetic cores are oppositely arranged, and each magnetic core comprises a main magnet and winding middle columns arranged on the main magnet at intervals; the winding areas are arranged between the two magnetic cores at intervals, the winding middle columns and air gap pieces used for forming middle air gaps are arranged in the winding areas, and the air gap pieces are arranged between the winding middle columns of the two magnetic cores and connected with the winding middle columns respectively; at least one special-shaped winding coil is configured in the winding area, and is wound on the winding middle column; the leakage magnets are connected to the top end of the main magnet, and a top air gap is formed between the leakage magnets of the two magnetic cores. The copper loss of the coupling inductor is reduced, and the comprehensive performance of the coupling inductor is improved.

A control device includes a PWM control unit, a current detector, and a short circuit detector. The PWM control unit outputs a control signal to the driver of a multiphase power supply in which the inductors of each phase are configured by a coupled inductor, and controls an on / off of the driver. The current detector detects the current flowing through the driver. The short circuit detector detects an inter-inductor short circuit based on a switching cycle of the driver and a current value detected by the current detector. The short circuit detector determines that an inter-inductor short circuit occurs between phases including a given phase when a differential value of the current value corresponding to the given phase is positive and greater than or equal to a threshold value during an off period of the driver in the given phase.

The invention discloses a method, a device and equipment for determining the inductance of a filter inductor and a medium, and relates to the technical field of inverters. By establishing a target state equation, the dynamic change of the output voltage under different bridge arms of the inverter system and the current of the filter inductor can be known subsequently. And according to the target state equation, determining a branch current of a coupling inductance winding of each bridge arm and a target current corresponding to filtering, so that the branch current and the target current are abstracted into a mathematical expression in a circuit operation process, and the branch current and the target current are deduced and determined through a mathematical mode. And determining the ripple current variation of the filter inductor by taking the determined branch current and the target current as subsequent constraint parameters. Furthermore, the inductance value of the filter inductor is determined based on the ripple current variable quantity of the filter inductor, and is used as an important basis for selecting the filter inductor, so that the specific inductance value is determined on the basis of reducing the inductance value of the filter inductor, and the selection accuracy is improved.

This invention discloses a magnetically integrated inductor and its fabrication method, as well as a dual-channel interleaved PFC circuit. The magnetically integrated inductor includes a first inductor and a second inductor; the first inductor and the second inductor are integrated to form a magnetically integrated coupled inductor; the first inductor includes a first magnetic core and a first coil; the second inductor includes a second magnetic core and a second coil; wherein the first coil is wound on the first magnetic core to form the first inductor; the second coil is wound on the second magnetic core to form the second inductor; the first magnetic core and the second magnetic core are integrated on a single magnetic core structure. This solution reduces the inductor volume of the two PFC circuits by integrating the two independent inductors of the two-channel PFC circuit into a single coupled inductor.

An apparatus comprises: a first layer (451); a second layer (452) over the first layer (451), wherein the second layer (452) comprises a magnetic material; a third layer (453) over the second layer (452); a first winding with a first shape in the first layer (451), wherein the first winding is electrically conductive; and a second winding with a second shape in the third layer (453), wherein the second winding is electrically conductive, and wherein the second shape is an inverse of the first shape.

Disclosed are a parallel multi-converter and a capacity design method therefor. A first output current model and a second output current model are generated by respectively acquiring electrical parameters of an inductive voltage source converter and a capacitive voltage source converter, and the first output current model and the second output current model are integrated under the same output current condition, so that it may be ensured that the inductive voltage source converter and the capacitive voltage source converter have the same current generating ability; meanwhile, a coupling inductance relationship between the inductive voltage source converter and the capacitive voltage source converter is combined to further obtain the optimal capacity value of the inductive voltage source converter and the optimal capacity value of the capacitive voltage source converter. Therefore, the L-VSC and the LC-VSC have the same current generating ability, and the multi-converter has lower total voltage capacity.

The utility model relates to the technical field of inductors, and particularly discloses a duplex-winding coupling inductor which comprises an inductor body made of magnetic powder, a first coil, a second coil, two first electrode plates and two second electrode plates. The first coil and the second coil are wound together, the two first electrode plates are connected with the two ends of the first coil respectively, and the two second electrode plates are connected with the two ends of the second coil respectively; the inductor body wraps the first coil and the second coil, the two first electrode plates and the two second electrode plates extend out of the inductor body and extend to the bottom face of the inductor body, the two first electrode plates are located at one set of opposite angles of the bottom face of the inductor body, and the two second electrode plates are located at the other set of opposite angles of the bottom face of the inductor body. According to the utility model, the magnetic circuit can be prolonged, and the two electrode plates connected with the same coil are not easy to be short-circuited.

The invention relates to the technical field of inverters, and discloses a coupling inductor wide buck-boost leakage-current-free grid-connected inverter, which comprises a direct-current power supply, a first inverter circuit, a filter capacitor, a filter inductor, an alternating-current power supply, a detection circuit and a control circuit, the first inverter circuit comprises a first capacitor, a second capacitor, a first metal oxide semiconductor field effect transistor, a second metal oxide semiconductor field effect transistor, a first diode, a second diode, a third metal oxide semiconductor field effect transistor, a fourth metal oxide semiconductor field effect transistor, a first inductor and a second inductor; a third diode, a fourth diode, a fifth diode, a fifth metal oxide semiconductor field effect transistor and a sixth metal oxide semiconductor field effect transistor; a detection circuit; and a control circuit. According to the invention, the cost and the size are reduced, and the magnetic loss is reduced; common-mode leakage current is suppressed; the service life of the whole inverter is prolonged; and active and reactive current support can be provided for a power grid.

The invention discloses a multi-turn-ratio degree-of-freedom magnetic coupling direct-current boost converter, and belongs to the field of power The problems that when an existing traditional Boost converter achieves high voltage gain, the boosting capacity is limited, and the voltage stress of a switching device is large are solved. Compared with the prior art, the multi-winding coupling inductors (N1, N2 and N3) are arranged, the extra design freedom degree is provided by setting different turn ratios, the voltage gain does not only depend on the duty ratio any more, the high voltage gain can be obtained under the medium duty ratio, meanwhile, the voltage stress of the power switch tube is remarkably reduced, and the efficiency and reliability of the converter are improved. The boost converter is mainly used for boost conversion.

The present application relates to the field of electronic technology and provides a coupler, a radio frequency front-end module, and a terminal device. The coupler includes: a dielectric board, a main transmission line, and a coupling inductor; the main transmission line and the coupling inductor are arranged on the dielectric board; the first electrode of the coupling inductor is connected to a coupling end; the second electrode of the coupling inductor is connected to a reference ground via an isolation resistor; the first electrode and the second electrode are connected via a coil inside the coupling inductor; the main transmission line includes an input end, a coupling portion, and an output end; the two ends of the coupling portion are respectively connected to the input end and the output end; the coupling portion is used to generate electromagnetic coupling with the coil when transmitting radio frequency signals. The coupler is small in size.

The application relates to the technical field of switching power supply, and discloses a bridge type low-stress passive soft switching boost power factor correction circuit, which comprises a direct current input power supply, a main power switching tube, an output filter capacitor and a coupling inductor comprising a primary side and a secondary side; a passive soft switching buffer network is connected to a main circuit of the circuit, the network comprises a diode full-bridge structure and a buffer capacitor, and the leakage inductance of the secondary side of the coupling inductor is connected between the midpoints of two bridge arms of the full-bridge structure; the application utilizes the ratio difference of the coupling inductor to generate a forward potential difference, drives the buffer capacitor to reversely charge to establish a negative voltage, and further provides a discharge circuit for the parasitic junction capacitance of the main power switching tube, so that zero voltage turn-on is realized, and high-frequency switching loss is reduced; meanwhile, the highest voltage stress of the semiconductor device is clamped in the range of the direct current output voltage through the potential restriction of the full-bridge network. The application does not need auxiliary active devices, and improves conversion efficiency and reliability while simplifying the system structure.