138 results about "Choke" patented technology

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.

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.

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.

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.

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.

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 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 present disclosure provides a filter system including N common mode chokes, N+1 first capacitors, N+1 second capacitors and N+1 third capacitors. Each common mode choke includes a first winding, a second winding, a third winding and an auxiliary winding. In the k-th common mode choke, a second terminal of the k-th first capacitor, a second terminal of the k-th second capacitor and a second terminal of the k-th third capacitor are all electrically connected to a k-th electrical midpoint, and two terminals of the auxiliary winding of the k-th common mode choke are electrically connected to the k-th electrical midpoint and a (k+1)-th electrical midpoint respectively, N is a positive integer and k is a positive integer less than or equal to N.

The invention relates to the technical field of high-voltage direct-current power transmission, and discloses a high-voltage direct-current converter valve cooling system flow sensor anti-interference circuit design method, which comprises the following steps: constructing a three-stage collaborative anti-interference system: a front-stage signal acquisition and primary protection circuit, a common-mode choke, a TVS diode and a PPTC resettable fuse combined network, and a high-voltage direct-current converter valve cooling system flow sensor anti-interference circuit; common-mode rejection and transient overvoltage protection are carried out on the original differential signals; the intermediate signal conditioning and isolating circuit is used for realizing accurate amplification of signals, thorough cut-off of ground loop interference and deep filtering through an instrument amplifier with a high common mode rejection ratio, an isolating amplifier and a second-order active Butterworth low-pass filter in sequence; the post-stage power supply anti-interference circuit provides a clean and stable power supply for the system through the cascade design of a pi-type filter, an isolation DC-DC, a magnetic bead isolation network and an ultra-low noise linear voltage regulator. According to the invention, through the full-link and multi-layer collaborative design, the anti-interference capability, the measurement precision and the operation reliability of the sensor in an extreme electromagnetic environment are improved.

The present invention relates to a high-frequency driven high-speed diagnostic electrostatic probe system and a method thereof and, more specifically, provides a high-frequency driven high-speed diagnostic electrostatic probe system and a method thereof, wherein a high-speed diagnosis for the characteristics of plasma is enabled by using a fitting function without a high impedance choke filter after a plurality of pieces of current waveform data, which are measured by applying a high-frequency bias voltage to a probe while shifting the phase of same, are phase-retrieved and averaged and then processed in accordance with a preset methodology.

A choke coil is mechanically fixed without using an adhesive, and a fixed state is maintained for a long period of time. A fixing structure of a choke coil electrically connected to a brush that is in sliding contact with a commutator and housing a ferrite core inside includes: a bottom surface portion where the choke coil is placed; a housing wall portion erected from the bottom surface portion and forming a first space that houses the choke coil with the bottom surface portion; an elastic portion that is formed by notching a part of the housing wall portion and capable of elastic deformation; and a pressing portion that presses the choke coil via the elastic portion by biasing the elastic portion to an inside of the first space, and fixes the choke coil between the pressing portion and the inner surface of the housing wall portion.

This application discloses a charging pile and its control method, relating to the field of DC charging technology. The charging pile includes a three-phase parallel resonant converter, a controller, and a relay control circuit. The three-phase parallel resonant converter is connected to both the controller and the relay control circuit. The three-phase parallel resonant converter includes three independent and structurally identical conversion units. Each conversion unit includes an input rectifier bridge, a resonant circuit, an isolation transformer, and a rectifier circuit connected in sequence. The resonant circuit includes a choke coil, a switching transistor, a shunt capacitor, a resonant capacitor, and a resonant coil. The rectifier circuit includes a rectifier capacitor, a diode, a filter capacitor, a first filter coil, and a second filter coil. The controller is used for: soft-start control of the output voltage and output current during the startup phase, and control of the series and parallel connection state of the relay control circuit; and for performing input-side and output-side regulation and drive wave generation control during the operation phase. This application has the advantages of high power density, small size, and simple control.

Three-phase choke, which includes the following: an outer circumferential iron core (20), wherein the outer circumferential iron core (20) comprises a plurality of outer circumferential iron core units (21 to 23), and at least three iron core coils (31 to 33) that come into contact with or are connected to an inner surface of the outer circumferential iron core (20), wherein the at least three iron core coils (31 to 33) comprise corresponding iron cores (41 to 43) and corresponding windings (51 to 53) wound around the iron cores (41 to 43), each of the iron cores (41 to 43) extending in a radial direction of the outer circumferential iron core (20), the three-phase choke further comprises a plurality of intermediate coil iron cores (81 to 83) arranged between the at least three iron core coils (31 to 33), and Columns (101 to 103), which can magnetically connect the at least three iron core coils (31 to 33) and the intermediate coil iron cores (81 to 83), are formed between the at least three iron core coils (31 to 33) and the intermediate coil iron cores (81 to 83).

An antenna system for tissue ablation includes an energy transmission member, a conductive hollow coil member coupled to the energy transmission member, and a fluid cooling system coupled to the conductive hollow coil member for providing a flow of cooling fluid through a member lumen of the conductive hollow coil member for cooling the conductive hollow coil member. In some examples, at least one of the antenna body, a choke member, and a hybrid choke member includes the conductive hollow coil member. In some examples, the hybrid choke member includes a choke portion wound around a portion of the energy transmission member, an antenna body portion wound around a portion of the energy transmission member, and an insulator portion extending between the choke portion and the antenna body portion. In some examples, the antenna system includes a sheath extending over the energy transmission member and the conductive hollow coil member.

The invention relates to the technical field of antennas, in particular to a small-sized high-polarization isolation filtering antenna, which comprises a feed layer, a coupling layer, a radiation layer and a choke layer, and is characterized in that the coupling layer, the radiation layer and the choke layer are sequentially stacked above the feed layer from bottom to top; the feed layer is electrically connected with the coupling layer, and the coupling layer realizes reverse-phase feed and coupling design; the radiation layer, the eruption layer and the antenna are integrally designed, and the radiation layer and the eruption layer are matched to realize high and low frequency suppression. Miniaturization, high-polarization isolation and filtering functions of the antenna are achieved, and the requirements of satellite communication and the like for antenna performance are met.

The application provides a common-mode choke design method for reducing the effective value of motor leakage current, and faces the field of motor drive and electromagnetic compatibility. In view of the problem that the existing researches pay more attention to common-mode voltage and ignore leakage current caused by high switching frequency, the mechanism of leakage current is first clarified, the common-mode equivalent circuit is established, the influence of bearing current is evaluated, and the nonlinear link is simplified. The mathematical expression of the choke for suppressing the leakage current is derived, the secondary resistance is optimized based on the root locus, and the core parameters are adjusted. Through simulation and comparative evaluation verification, the optimized choke can significantly reduce the effective value of the leakage current and improve the system EMC, and provides a feasible scheme for precise suppression of high-frequency motor drive.

The utility model discloses an X-wave band driving amplifier which is provided with three stages of amplification paths, the first two stages of amplification paths are provided with feedback loops, and the feedback loops are formed by connecting a blocking capacitor, a feedback resistor and a feedback inductor in series and can adjust gain, restrain distortion and compensate high-frequency phase shift. And each stage of amplification path provides stable direct current bias for the transistor through an active bias circuit, a gate / drain filter capacitor and a choke inductor. The radio frequency transmission circuit integrates a pi-type attenuator, a blocking capacitor and a matching inductor / capacitor to realize impedance matching and signal amplitude adjustment. The transistor is grounded in a low-impedance mode through a grounding ground hole, high-frequency interference is reduced, stable broadband gain, high P1dB and high stability are achieved through multi-stage negative feedback, power supply filtering and a matching network, efficient signal transmission and anti-interference capacity are achieved, and the high-frequency broadband amplifier is suitable for a high-frequency scene. The problems of gain fluctuation, distortion and insufficient stability of a traditional amplifier in a broadband are solved, and the amplifier has the advantages of being compact in structure and high in practicability.

An electrically driven compressor is provided, which prevents an increase in the projection area of ​​an inverter receiving section even when a filter element is enlarged and the number of filter elements increases as a measure against electromagnetic noise.On an electrically driven compressor (1), a filter circuit unit (30) includes a first filter circuit board (31) on which several electrolytic capacitors (51) are mounted, a second filter circuit board (33) on which, among other things, a differential-mode choke coil (53) and a common-mode choke coil (55) are mounted, and a busbar element (35) comprising a busbar (351) which electrically connects the first filter circuit board (31) and the second filter circuit board (33), and a plastic retaining section (352) which holds the busbar (351), wherein the first filter circuit board (31) and the second filter circuit board (33) are received in an inverter receiving section (7) in a state in which they are stacked on top of each other such that the busbar element (35) lies between them.

The application discloses a wide-band hat-type feed antenna and belongs to the technical field of satellite communication antennas. The method adopts a light-wall shaped horn loaded with an outer corrugated slot and a choke slot, improves horn and space matching, realizes expansion of a frequency band from 1.6:1 to 2.8:1, loads a slot at the horn mouth and the edge of the choke slot, realizes equalization characteristics of a feed radiation pattern, adopts a small-size sub-reflector to reduce shielding of the reflector, loads double choke slots in the reflector, reduces diffraction of the sub-reflector, and improves antenna radiation efficiency, and uses spline parameterization of the sub-reflector and the main reflector to realize integrated optimization design, so that the frequency bandwidth of the traditional hat-type feed is expanded, and good side lobe and efficiency performance are realized.

This disclosure relates to common-mode and bearing currents in AC drive systems by using an AC choke assembly integrated into shielded electrical coaxial cables. This design reduces common-mode currents and ensures electromagnetic compatibility. The AC choke has a magnetic core with an axial bore that accommodates the electrical coaxial cables. The cables are enclosed in a metal housing and insulated by a dielectric separator. An optional dielectric outer cover can further insulate the metal housing. Thermal paste can be used to maximize heat conduction between the different layers of the AC choke. One side of the metal housing is connected to a first set of coaxial cable shields, and the other side can be connected to a traction drive unit (TDU) or a traction power inverter module (TPIM).Alternatively, the AC choke can also be located in a middle section of the coaxial cables.