214 results about "Choke" patented technology

The application provides a high-frequency circulating current calculation method for a motor simulator cascaded coupling parallel structure, comprising the following steps: establishing an equivalent decoupling circuit model of each branch in the cascaded coupling parallel structure based on the voltage relationship of each branch in the motor simulator cascaded coupling parallel structure, wherein the equivalent decoupling circuit of each branch comprises an equivalent voltage source and an equivalent leakage inductance connected in series, and the equivalent leakage inductance is determined based on the self-inductance and mutual inductance of each branch choke; dividing a plurality of duty cycle intervals between 0 and 1, and the number of duty cycle intervals is equal to the number of branches in the cascaded coupling parallel structure; and using the equivalent decoupling circuit model to calculate the high-frequency circulating current of each branch when the duty cycle of the modulation signal of the motor simulator is in each duty cycle interval. The method provided by the application can accurately calculate the high-frequency circulating current of the motor simulator cascaded coupling parallel structure, and provides effective support for the targeted design of a high-frequency circulating current suppression scheme.

The invention discloses a continuous wave high-isolation transceiving phased-array antenna, belongs to the technical field of phased-array antennas, and solves the problem of how to improve the isolation of the transceiving phased-array antenna. Comprising a metal floor, and a transmitting phased array, a receiving phased array and a choke groove which are arranged on the upper surface of the metal floor; the choke groove is arranged between the transmitting phased array and the receiving phased array; the choke groove comprises a first isolation plate and a second isolation plate; the first isolation plate and the second isolation plate are arranged in parallel along the y axis, a wave-absorbing material is arranged on one surface, far away from the second isolation plate, of the first isolation plate, and a wave-absorbing material is arranged on one surface, far away from the first isolation plate, of the second isolation plate; according to the invention, the isolation degree between the continuous wave transmitting and receiving array surfaces is improved by optimizing the array layout and pasting the wave absorbing material on the double-layer isolation plate, and the antenna can be widely applied to a continuous wave radar system, can meet the isolation degree requirement of the antenna in different scanning states, and has good engineering application value.

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.

Disclosed is a novel dipole antenna design having symmetric poles, each pole having a half circle resonator and an oval resonator that are electrically connected by a straight choke section; the dipole shape permits a wideband dipole response with a transition frequency between a lower and upper frequency band. A cross bar and capacitively-coupled stubs tune at the transition frequency to create a continuous impedance and gain-bandwidth. The dipole and the crossbar and stubs are formed on opposite surface or sides of a substate. Data demonstrates the novel dipole antenna can exceed the gain-bandwidth of the state-of-the-art bowtie by approximately 5 times, that is, its gain-bandwidth is 10:1 versus the standard bowtie gain-bandwidth of 2:1 at broadside.

A method of controlling the magnetic saturation of the core of a DC common mode choke comprising a magnetic core 1 and first and second coils 2, 3, comprises: determining the saturation percentage of

1. The name of the design product: plug puller (mechanical type). 2. The use of the design product: a tool for removing the plug of the end of the signal system lead, jumper wire, choke wire, etc. in the rail transit industry. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to a method, in particular a computer-assisted method, for monitoring the state of an electrical device, preferably for monitoring the short-circuit current rating of an electrical device, in particular a transformer (1) or a choke, preferably a compensation choke, wherein the electrical device comprises a solid insulation assembly (I) and a liquid and / or gaseous insulation medium which is in contact with the solid insulation assembly (I), the method having the following steps: S1) measuring operating parameters of the electrical device; S2) providing and / or creating a simulation model of the electrical device; S3) carrying out a simulation for the electrical device using the simulation model and the measured operating parameters; and S4) evaluating the state of the electrical device, in particular the short-circuit current rating of the electrical device, on the basis of the results of the simulation.

The invention relates to an electronic function module and a connector, the electronic function module comprises an insulation mold shell, a coil assembly and a choking coil assembly, the upper part of the insulation mold shell is provided with a containing cavity, and the lower part of the insulation mold shell is provided with a receding groove; the coil assembly is arranged in the accommodating cavity; the choking coil assembly is electrically connected with the coil assembly, and the choking coil assembly is arranged in the receding groove. According to the electronic function module provided by the invention, only one group of coil assemblies need to be arranged in the accommodating cavity of the insulating mold shell, so that the volume of the accommodating cavity can be reduced; through the arrangement of the abdicating groove, the complete overlapping or partial overlapping of the occupied area of the insulating module shell and the choking coil assembly on the circuit board can be realized, the occupied area of the whole electronic function module on the circuit board can be reduced, and the miniaturization arrangement of the connector can be realized.

A common mode choke device is provided with a first common mode choke and a second common mode choke, the first common mode choke and the second common mode choke are arranged in parallel such that annular iron cores are coaxial, and a pair of opposing metal rings formed as annular metal plates are attached to opposing annular surfaces of the first common mode choke and the second common mode choke. A pair of opposed metal rings is connected to a reference potential. The pair of opposing metal rings function as a capacitance of a parasitic capacitance corresponding to the area of the opposing surfaces and the distance between the opposing surfaces, and thus the common mode choke device functions as an LCL filter.

Embodiments include a choke system that passes enlarged debris despite having a relatively small diameter for an input port of the choke system. Embodiments also include systems to prevent dislodging of a choke seat when backpressure is supplied to the choke system. Embodiments also include sealing systems to prevent fluid leaks around the choke seat of the choke system.

The invention relates to the technical field of track traffic safety monitoring, in particular to a track circuit operating characteristic analysis system and method.The track circuit operating characteristic analysis system comprises a traction rail backflow monitoring module used for monitoring line parameters on a lead wire between a choke transformer and a steel rail and extracting 50 Hz components of the line parameters; when the system is used, the absolute value and the flow direction state of rail backflow current are mastered in real time, a rail transmission line mathematical model is utilized, real-time quantitative monitoring of the train shunt state is achieved, and continuous spectrum tracking of a target frequency point is achieved through sliding Fourier transform; the method achieves the purpose of monitoring traction rail backflow, dynamic shunt resistance and adjacent line interference on line at the same time, carries out comprehensive analysis based on monitoring data, facilitates the improvement of the sensitive detection capability of abnormal shunt behaviors, eliminates the influence of adjacent line interference, can achieve multi-frequency-point signal extraction only through one current transformer, and improves the detection efficiency. And the hardware complexity and cost can be reduced.

A laminate non-planar radio-frequency (RF) choke device includes a first RF choke. The first RF choke has a first winding structure including a plurality of first conductive traces and a plurality of first vias. The first conductive traces are formed on a first layer and a second layer of a laminate. The first vias are formed between the first layer and the second layer of the laminate. The first vias are stitched in a winding direction through the first conductive traces.

The embodiment of the application relates to the technical field of communication, and discloses an antenna array and a communication device, the antenna array comprises a bearing base body, a waveguide antenna unit, a choke component and a feeding structure, the waveguide antenna unit comprises a plurality of first antenna elements and a plurality of second antenna elements, the first antenna element comprises a first rectangular waveguide cavity and a first radiation aperture arranged on the first rectangular waveguide cavity, the second antenna element comprises a second rectangular waveguide cavity and a second radiation aperture arranged on the second rectangular waveguide cavity, and the choke component is arranged on the waveguide antenna unit. In the above manner, the embodiment of the application can effectively constrain electromagnetic waves to propagate in a specific path, can significantly improve energy transmission efficiency compared with an open radiation structure, effectively suppresses array interference, and provides a high-performance antenna for a 72-78 GHz frequency band communication system.

The invention relates to an LTCC (Low Temperature Co-Fired Ceramic)-based switch type band-pass filter. The filter comprises a multi-layer LTCC substrate, a resonator, a switching circuit and a control circuit are packaged into a whole through a three-dimensional integration technology, and the multi-layer LTCC substrate is formed by vertically stacking and sintering a plurality of layers of ceramic green sheets; the number of the resonators is at least two, the adjacent resonators realize electromagnetic coupling through a rectangular coupling window, and the tail ends of the resonators are connected to a bottom layer grounding plane through metalized through holes; the switching circuit comprises a plurality of PIN diodes, the diodes are embedded between the fourth layer and the fifth layer of the LTCC by flip-chip bonding, the anodes are connected with the control line through through holes, and the cathodes are directly grounded; the control circuit comprises a coplanar waveguide and a high-frequency choking coil, and the coplanar waveguide is connected with the high-frequency choking coil in series. The switch and the filter are integrally packaged, and the size is smaller than 5 mm * 3 mm * 1 mm; the switching state insertion loss is less than or equal to 2dB, and the turn-off isolation is greater than or equal to 30dB; lTCC packaging is resistant to high temperature and vibration, and is suitable for severe environments.

The present disclosure relates to a choke system for reducing common mode current in an AC drive system. The present disclosure addresses common mode current and bearing current in an alternating current (AC) drive system by using an AC choke assembly integrated with a shielded coaxial electrical cable. This design weakens common mode current and ensures electromagnetic compatibility. The AC choke assembly includes a magnetic core with an axial bore that receives a coaxial electrical cable. The cable is surrounded by a metal housing and insulated by a dielectric separator. An optional dielectric outer cover may further insulate the metal housing. Thermal interface pastes may be used to maximize heat transfer between layers of an AC choke. One side of the metal housing is connected to the first set of coaxial cable shield ends, or the other side may be connected to a traction drive unit (TDU) or a traction power inverter module (TPIM). Alternatively, the AC choke may be located in a middle section of the coaxial cable.

To mitigate magnetic saturation in a common-mode choke coil by means of a digital control unit.SOLUTION: A power conversion device includes a common-mode choke coil, a power converter that performs forward conversion or frequency conversion on AC current inputted via the common-mode choke coil, current measurement means that measures current flowing through the common-mode choke coil in a common mode, and a digital control unit that, if a measurement value of the current or a calculation value based on the measurement value exceeds a threshold, switches operation of the power converter to reduce a peak value of the current at a frequency component the same as the carrier frequency of the power converter, to be lower than that before the switching of the operation.SELECTED DRAWING: Figure 1

The utility model relates to electronic components technical field especially relates to a choke coil inductor, the utility model discloses the protrusion that extends along the radial is arranged at two corners of base body, the threading hole along the axial is seted up on the protrusion, and the both ends of coil extend to two protrusions along the radial respectively, and the one end of two electronic wires respectively passes threading hole and is electrically connected with the both ends of coil, and such design can increase the distance between the two lead ends of coil, and the insulation performance and reliability of inductor are improved significantly, and the corona discharge problem under high pressure environment is avoided.

The invention relates to a coil assembly (1) for electrical energy supply networks. Said coil assembly (1) comprises a hollow-cylindrical air-core choke coil (2) having a vertically extending coil axis (3), and also comprises a support structure (7) having an annular support body (10), which annular support body (10) defines an upper supporting plane, and which annular support body (10) is located below a lower axial end (14) of the air-core choke coil (2) and is designed to support the air-core choke coil (2) in a load-bearing manner. The support structure (7) also comprises a plurality of column-like insulators (11) which are designed to support the annular support body (10) and the air-core choke coil (2) in an electrically insulating and load-bearing manner with respect to a ground foundation or with respect to a ground level (8). The annular support body (10) comprises concrete (18), which concrete (18) is used as the material for providing the load-bearing, strength-relevant annular shape of the support body (10), wherein the concrete (18) contains a non-ferromagnetic reinforcement (19). Said non-ferromagnetic reinforcement (19) comprises fibres, rods (20) and / or mats (21) made of at least one non-ferromagnetic material embedded in the concrete (18).

A header power connector includes a header housing assembly having an outer housing with an outer wall forming a cavity and a separating wall separating the cavity into a choke chamber and a terminal chamber. The outer housing is configured to receive an upper busbar through the top and a lower busbar through the bottom. An inner housing is received in the terminal chamber and holds a terminal assembly with terminals arranged in a terminal stack configured to electrically connect the upper and lower busbars. The header power connector includes a choke received in the choke chamber between the outer wall and the separating wall. The choke has a choke body surrounding the terminal assembly. The choke body has an opening therethrough receiving the terminal assembly.

The utility model discloses a self-monitoring choke transformer which comprises a choke transformer body and a self-monitoring device, the self-monitoring device is installed on the choke transformer body, the choke transformer body and the self-monitoring device are integrally arranged in a box body of the choke transformer, and the choke transformer body comprises a traction coil and a signal coil. The traction coil and the signal coil are oppositely arranged, the self-monitoring equipment comprises a monitoring and diagnosing module and a current sensor, the monitoring and diagnosing module is connected with the current sensor, the current sensor comprises a single-head sensor and a double-head sensor, the single-head sensor is connected with the signal coil, and the double-head sensor is connected with the traction coil. The indoor side current and the steel rail side current of the trackside choke transformer equipment are collected in real time, the monitoring and diagnosis module analyzes, extracts and calculates mixed signals, basic operation data of a track circuit can be collected conveniently, and analysis and fault positioning of faults such as traction unbalanced current, steel rail insulation joint insulation damage, rail breakage and adjacent line interference are assisted.

This invention provides a high backlobe suppression horn antenna, comprising a horn antenna cavity with a choke slot. The horn antenna cavity is installed within a reflector cavity to form a high backlobe suppression horn antenna. This invention uses a simple cabin structure as the reflector cavity, which is more suitable for horn antennas compared to complex cavity structures, and can be assembled with an radome, exhibiting high installation adaptability.

In a π-type noise filter using a common-mode choke coil, a simple structure is used to suppress deterioration of electromagnetic interference caused by a grounded capacitor. A resistor (54) of a noise filter (50) is arranged between a first input terminal (51a) and a second input terminal (51b) of a common-mode choke coil (51) and a ground line (EC). The resistor (54) is arranged so that current flowing between the first input terminal (51a) and the second input terminal (51b) of the common-mode choke coil (51) and a first output terminal (51x) and a second output terminal (51y) via a first front-stage capacitor (52) or a second front-stage capacitor (53) flows through the resistor (54).

The choke includes a coil and a body. The coil defines a first axial direction and a second axial direction that are perpendicular to each other, and the coil includes multiple first, third, and fifth leads along the first axial direction, multiple second, fourth, and sixth leads along the second axial direction, and a seventh lead along the first axial direction. The first leads are respectively connected to the second leads, the second leads are respectively connected to the third leads, the third leads are respectively connected to the fourth leads, the fourth leads are respectively connected to the fifth leads, the fifth leads are respectively connected to the sixth leads, and the sixth leads are respectively connected to the seventh lead. The body includes a magnetic material and encloses the coil with the first leads arranged and exposed outside the body.

This invention provides a compact noise filter that sufficiently reduces high-frequency electromagnetic noise even when used in a power converter with a changeable number of drive phases. [Solution] The power converter comprises a common mode choke coil connected to the output side of a multi-phase power converter with a changeable number of drive phases, a variable gain circuit connected to the output side of the common mode choke coil that changes the gain according to the number of drive phases of the power converter and outputs a signal that inverts and cancels high-frequency noise, and a Y capacitor that outputs the signal from the variable gain circuit to the output side of the common mode choke coil.

The invention discloses an electric power sensor communication interference suppression method and system based on piezoelectric ceramic filtering. The method comprises the following steps: measuring the communication interference noise frequency of an electric power sensor; establishing a relation model of the geometric dimension and the resonance frequency of the piezoelectric ring; calculating the geometric dimension of the piezoelectric circular ring required for suppressing the frequency; the obtained piezoelectric circular ring is connected to an EMI filter, and a Y capacitor in the EMI filter is replaced; a common mode choke matched with the piezoelectric circular ring is added into the EMI filter to design a piezoelectric EMI filter; and acquiring an external working state in real time, and dynamically controlling a piezoelectric circular ring in the piezoelectric EMI filter according to the interference frequency center real-time monitoring model to complete automatic tuning of the center frequency of the piezoelectric EMI filter. The power sensor communication interference noise suppression method has the capability of dynamically adapting to complex working environment changes while realizing efficient suppression of the communication interference noise of the power sensor, effectively reduces the size of the filter while ensuring the filtering performance, and reduces the suppression scheme cost.

The present invention relates to an electronic unit (10) comprising a choke unit (12) which has a first choke element (14) and a second choke element (16), wherein the choke unit (12) is designed to form a common-mode choke, wherein the electronic unit (10) has a first printed circuit board unit (18) and a second printed circuit board unit (20), wherein the choke unit (12) is designed to form a signal- and / or energy-conducting connection with the first printed circuit board unit (18), wherein the second printed circuit board unit (20) has at least one recess (22), wherein the choke unit (12) projects through the recess (22) in order to space the first choke element (14) and the second choke element (16) from the first printed circuit board unit (18) and from the second printed circuit board unit (20).

The present application provides an electromagnetic compatibility (EMC) filter comprising: at least two magnetic chokes, each of which includes a first component and a second component constituting a magnetic loop, the first component of the at least two magnetic chokes being made of a first magnetic choking material and having the same shape and size, and the second component of the at least two magnetic chokes being made of a second magnetic choking material and having the same shape and size; the second parts of the at least two magnetic chokes are made of a second magnetic choking material different from the first magnetic choking material and have the same shape and size, and the first part and the second part of each magnetic choke respectively form a section of magnetic circuit of the magnetic loop. By utilizing the EMC filter provided by the invention, the number of molds required to be manufactured can be remarkably reduced, the manufacturing cost of the magnetic ring is reduced, meanwhile, the problem of mismatching of magnetic parts can be avoided, the assembly complexity is reduced, and the time required for assembly is shortened.

The utility model relates to an anti-interference wireless signal transmitting board, and belongs to the technical field of wireless signal transmitting boards, the anti-interference wireless signal transmitting board comprises a mounting board, the outer side of the mounting board is fixedly connected with a protective shell, the protective shell is internally provided with a substrate assembly, the substrate assembly comprises a double-layer PCB, the upper layer of the double-layer PCB is a signal wiring layer, and the lower layer of the double-layer PCB is a grounding layer. The beneficial effects of the utility model are that when an external signal enters the substrate assembly through the signal input line, the external signal enters the signal wiring layer after the out-of-band noise is filtered by the LC filter circuit board, the common mode choke suppresses the high-frequency common mode interference of the power supply circuit, and the nanocrystalline alloy film absorbs high-frequency electromagnetic waves through magnetic loss, so that the high-frequency interference of the power supply circuit can be suppressed. And meanwhile, the grounding layer forms a Faraday cage effect to shield low-frequency interference, so that full-band interference suppression of the substrate assembly can be realized under the synergistic effect of the nanocrystalline alloy film, the common-mode choke and the grounding layer, and signal communication can be more stable.

The goal is to miniaturize and lighten common mode choke coil devices. [Solution] A first common mode choke coil and a second common mode choke coil are arranged parallel to each other so that their annular cores are coaxial. A pair of opposing metal rings, formed as annular metal plates, are attached to the opposing annular surfaces of the first and second common mode choke coils, and the pair of opposing metal rings are connected to a reference potential. Since the pair of opposing metal rings function as capacitances with parasitic capacitances corresponding to the area of ​​the opposing surfaces and the distance between the opposing surfaces, the common mode choke coil device functions as an LCL filter.

The broadband GNSS antenna includes a top-surface slot-fed broadband patch radiator and a single-grooved vertical choke ring structure surrounding the patch radiator. The patch radiator includes a radiator ground plane, a slot-fed radiating patch, a broadband feed network, and a set of elements with vertical currents. The vertical choke ring structure includes a conductive top surface with a set of slots, a conductive bottom surface, and an adjacent vertical conductive cylinder.