340 results about "Coupling inductor" patented technology

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 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 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 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 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.

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.

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 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.

The invention discloses a self-voltage-sharing bipolar phase-shifted full-bridge converter based on a coupling inductor, which comprises a full-bridge circuit, a high-frequency transformer Tr, a leakage inductor Lk, a blocking capacitor Cb, a full-bridge rectifying circuit, filter inductors Lf1 and Lf2 and a bipolar output circuit, a leakage inductor and a blocking capacitor are connected in series and then connected to the primary side of the high-frequency transformer; the high-frequency transformer comprises a primary winding and a secondary winding with a center tap, and the secondary winding is connected with the full-bridge rectifier circuit; the invention further provides a control method of the bipolar phase-shifted full-bridge converter. The novel bipolar port self-voltage-equalizing method based on the coupling inductor is adopted, output port voltage balance under any load condition is achieved without adding any additional device and voltage-equalizing control, and the method has the advantages of being low in cost, easy to control and wide in adjusting range.

Various embodiments disclose a cross-inductor voltage regulator comprising a first switching circuit configuration pair, the first switching circuit configuration pair comprising a first set of switching circuits, a first compensating coupled inductor coupled to the first set of switching circuits, a second set of switching circuits, and a second compensating coupled inductor coupled to the second set of switching circuits, wherein the first compensating coupled inductor comprises a first winding of a compensating coupled transformer and the second compensating coupled inductor is a second winding of the compensating coupled transformer.

This invention proposes a quadratic dual-coupled inductor DC-DC converter, belonging to the technical field of power electronic converters. Based on a quadratic cascaded boost converter, the quadratic dual-coupled inductor DC-DC converter splits the input current into two branches on the input side, and both switching transistors are simultaneously turned on and off. Two sets of coupled inductors are introduced on the input side, and several capacitors and diodes are added on the output side to form a CLC coupled inductor voltage multiplier unit. This invention has high voltage gain and is suitable for new energy power generation systems such as fuel cells and photovoltaic cells.

The invention relates to a manufacturing method of a coupling inductor formed by assembling an E-shaped magnetic core and a T-shaped magnetic core. The problems that an existing coupling inductor is large in size and low in reliability are solved. The inductor manufactured through the manufacturing method of the coupling inductor formed by assembling the E-shaped magnetic core and the T-shaped magnetic core comprises the E-shaped magnetic core, the T-shaped magnetic core, a magnetic circuit closed magnetic core, a first coil, a second coil and soft magnetic metal powder, a middle column is arranged in the middle of the E-shaped magnetic core, vertical walls are arranged on the periphery of the E-shaped magnetic core, and the section of the T-shaped magnetic core is in a T shape. And a closing plate is arranged on the magnetic circuit closing magnetic core. By nesting and assembling the E-shaped magnetic core, the T-shaped magnetic core and the magnetic circuit closed magnetic core, the two inductance units are highly integrated in a three-dimensional space, a closed magnetic circuit is formed through hot press molding, the overall size is reduced, and the power density is improved; in addition, the distance and the position of the coil can be effectively guaranteed, the E-shaped magnetic core and the T-shaped magnetic core are pre-heated and formed firstly, it can be guaranteed that the deformation of the coil is smaller during hot press forming, and therefore the reliability of the coupling inductor is guaranteed.

This invention discloses a non-isolated modular multilevel converter for energy storage and its control method, relating to the field of medium-voltage direct transmission of energy storage. The converter includes a bridge arm composed of multiple cascaded basic module units and a three-winding coupled inductor array. The basic module unit includes a half-bridge and capacitor unit and an additional half-bridge unit. The three-winding coupled inductor array interconnects the basic module units at corresponding positions in the three-phase horizontal direction and connects them to a battery pack. This invention eliminates the need for complex circulating current suppression strategies; it only requires basic voltage and current dual closed-loop control to naturally eliminate low-frequency voltage fluctuations in submodule capacitors and second-harmonic circulating currents in the bridge arm. This significantly reduces the size of the submodule capacitors, increases the system power density, reduces switching device losses and current stress, simplifies the control system, and improves dynamic response speed and fault safety.

This invention discloses a two-phase coupled inductor, relating to the field of inductor technology. The invention includes a cylindrical housing with a support plate inside, on which the two-phase coupled inductor body is mounted. Several through holes are formed on the support plate surrounding the two-phase coupled inductor body. A fan is mounted on the bottom side of the housing, and several air inlets are formed on the bottom sidewall of the housing. A top cover is fitted onto the top of the housing, and several rings of heat dissipation holes are formed on the top cover. Each ring of heat dissipation holes includes a ring of ventilation holes on the top cover. A receiving groove is provided inside the top cover, corresponding to each ring of heat dissipation holes. This invention draws in cooling air through the fan and air inlets at the bottom of the housing. The airflow passes through the through holes on the support plate and is directly blown onto the two-phase coupled inductor body for forced cooling. The hot air rises to the top and is discharged through the rings of heat dissipation holes on the top cover. This bottom-in, top-out airflow path conforms to the principle of hot air rising, resulting in high heat dissipation efficiency.

The invention discloses a differential derivative structure circuit based on three-coupling transformation and an amplifier, and relates to the technical field of amplification circuit design. The differential derivative structure circuit comprises a three-coupling inductance network and N output parts. Through a three-coupling transformation mode, power supply of a main amplifier tube and an auxiliary amplifier tube in a differential derivative structure formed by connecting MOS tubes in parallel is integrated into an inductance matching network, so that homologous coupling of the main amplifier tube and the auxiliary amplifier tube on a radio frequency signal path is realized, physical isolation and independent bias control are also realized on a direct current path, and the power supply efficiency is improved. Therefore, a resistor does not need to be used, excessive use of a capacitor is avoided, loss caused by self impedance of the capacitor and ground parasitic capacitance loss are reduced, gain is greatly improved, extra area occupation caused by the capacitor and the resistor is effectively inhibited, and thermal noise introduced by the resistor is eliminated by utilizing the characteristic of low impedance of inductive coupling. Therefore, post-stage noise is effectively suppressed, and the noise coefficient is reduced.

This invention discloses a millimeter-wave broadband high harmonic suppression tripler, comprising an input matching network, a time-domain shaping tripler unit, and a differential common-source output stage. The proposed time-domain shaping tripler unit employs transistor pairs with different gate widths and bias voltages to superimpose two sets of voltage signals of different amplitudes in the time domain, thereby enhancing the inherent harmonic suppression of the tripler unit. Furthermore, by connecting a common-mode impedance control in series at the center tap of the primary inductor coil of the output transformer of the tripler unit, the output power of the third harmonic is further improved. The input matching network achieves single-ended to differential conversion, with its primary and secondary coil center taps grounded and open-circuited respectively in a counterintuitive manner, improving differential-mode balance and common-mode stability. Simultaneously, by using a series-coupled inductor, the quality factor of the transistor input impedance is reduced, improving the bandwidth performance of the tripler.

Systems and methods for implementing linear inductor current modeling of coupled inductors is generally described. The method for operating a multiphase power converter comprises measuring an output voltage being provided by a multi phase power converter to a load. The multi phase power converter comprises a plurality of phases. The method further comprises measuring a plurality of phase currents of the plurality of phases. The method further comprises generating a plurality of linear inductor current models for the plurality of phases based on at least one of the output voltage, the plurality of phase currents and a plurality of inductor characteristics of output inductors in the plurality of phases.

This invention discloses a multi-port series circuit breaker with a shared injection unit and its control method. The circuit breaker includes a shared voltage injection unit, a fault selection unit, an integrated coupling inductor unit, and a multi-port main current-carrying branch. Multiple DC lines share a single voltage injection unit through the fault selection unit. The voltage injection unit injects reverse voltage into the faulty line through a pulse transformer to achieve active limitation and interruption of the fault current. This invention transforms passive commutation into series active current-limiting interruption. By sharing an active injection unit across multiple ports, the number of fully controlled switching transistors is reduced, resulting in fast interruption speed, low current loss, and low cost.

The utility model relates to a filter circuit, a dielectric filter and a duplexer, and the filter circuit comprises a signal input end which is used for inputting a signal; the signal output end is used for outputting a signal; the resonance unit comprises a plurality of resonance circuits which are sequentially arranged between the signal input end and the signal output end in parallel; the coupling inductor unit is arranged between the signal input end and the grounding end and between the signal output end and the grounding end, and the coupling capacitor unit is arranged between the signal input end and the first resonance circuit and between the signal output end and the last resonance circuit. According to the utility model, the problem of large return loss in an ultra-wide passband can be solved, standing waves are effectively improved, the working efficiency of the filter is improved, and the communication effect is improved. The dielectric filter is connected with the grounding silver layer on the outer surface of the ceramic substrate through leading out a first connecting line and a second connecting line from the input port and the output port respectively, and plays a role of equivalent inductance.

The invention discloses a quasi-Z-source high-gain three-port DC-DC converter based on a coupling inductor, and belongs to the field of power electronic converters. Three ports of a fuel cell FC, a storage battery Bat and a resistive load R are arranged, on the basis of a Boost converter, a quasi-Z-source structure is adopted, meanwhile, a coupling inductor voltage-multiplying unit is combined, the connection mode of a coupling inductor and a capacitor in a circuit and the on-off condition of a diode are changed by controlling the on-off of three switching tubes, and therefore the voltage-multiplying unit can be used for converting the voltage-multiplying unit into the quasi-Z-source voltage-multiplying unit. Therefore, the voltage gain from the FC port to the R port and from the Bat port to the R port is improved. The invention has the advantages of continuous input current, high voltage gain, common ground input and output, high integration level, high stability and the like, and is suitable for new energy hybrid power generation systems such as fuel cells and photovoltaic cells.