410 results about "Choke" patented technology

The invention provides a high-frequency circulating current calculation method for a motor simulator cascade coupling parallel structure, and the method comprises the following steps: building an equivalent decoupling circuit model of each branch in the cascade coupling parallel structure based on the voltage relation of each branch in the motor simulator cascade coupling parallel structure, wherein the equivalent decoupling circuit of each branch comprises an equivalent voltage source and an equivalent leakage inductor which are connected in series, and the equivalent leakage inductor is determined based on self-inductance and mutual inductance of a choking coil of each branch; a plurality of duty ratio intervals are divided between 0 and 1, and the number of the duty ratio intervals is equal to the number of the branches in the cascade coupling parallel structure; and using the equivalent decoupling circuit model to calculate the high-frequency circulation of each corresponding branch when the duty ratio of the modulation signal of the motor simulator is in each duty ratio interval. According to the method provided by the invention, the high-frequency circulating current of the cascade coupling parallel structure of the motor simulator can be accurately calculated, and effective support is provided for targeted design of a high-frequency circulating current suppression scheme.

An antenna that enables dense packing of radiators includes a plurality of first radiators configured to radiate in a first frequency band and a plurality of second radiators configured to radiate in a second frequency band, the second frequency band having higher frequencies than the first frequency band. each of the plurality of first radiators includes a plurality of dipole arms. Each of the plurality of dipole arms includes a periodic pattern of inductive choke segments, and each of the dipole arms has a broken peripheral current path.

A broadband 4T4R automobile radar antenna disclosed by the present invention comprises an upper-layer radiation plate and a lower-layer feed plate, the upper-layer radiation plate is provided with a plurality of horn mouths and a plurality of EBG choke grooves, the horn mouths and the EBG choke grooves are distributed at intervals in a staggered manner, each horn mouth is internally provided with a plurality of radiation slots at unequal intervals, and the upper-layer radiation plate is provided with a plurality of feed slots. A waveguide feed port is arranged on the lower surface of the lower layer feed panel; compared with the prior art, in order to ensure the antenna gain, the choke design in the EBG form is adopted between the antenna units, the transmission of surface waves is effectively restrained, and the isolation degree between the antenna units is improved; the horizontal plane realizes a good gain effect by accurately optimizing taper pin distribution of the slot array and amplitude-phase excitation of the feed network, and has better sidelobe envelope directional diagram characteristics; and the width of the lobe on the horizontal plane is adjusted by adjusting the inclination angle of the horn mouth, so that the width reaches 63 + / -3 degrees, and the gain effect is effectively improved.

In an embodiment a choke module includes a choke with a magnetic core and at least two windings, a thermally conductive pad, and a footprint capacitor, which is a plate capacitor, and which is configured to provide a mechanical support for the choke, wherein the footprint capacitor comprises at least one first electrode layer, at least one dielectric layer and at least one second electrode layer located one above the other, wherein the choke is located on the footprint capacitor, wherein an upper surface of the footprint capacitor faces the choke, and wherein the thermally conductive pad is arranged on the upper surface of the footprint capacitor.

The invention discloses an internal-cooling-based high-frequency coupling window for a high-power cyclotron. The internal-cooling-based high-frequency coupling window is characterized in that an air knife structure is arranged at the atmosphere end of the internal-cooling-based high-frequency coupling window; two groups of conductor choke units with different lengths are arranged on two sides of a ceramic chip of the high-frequency coupling window based on internal cooling, and the two groups of conductor choke units with different lengths are equivalent to two groups of inductors and are used for forming a double-filter circuit of the high-frequency coupling window; a ceramic coating film is arranged on one side of the ceramic sheet of the high-frequency coupling window; according to the air knife structure, more heat on the surface of the ceramic chip is taken away through compressed air; on one hand, the filter unit and the conductor choke unit form a filter circuit of a high-frequency coupling window atmosphere end; according to the invention, the air knife structure is ingeniously utilized, and enhanced cooling is carried out on the ceramic wafer of the coupling window structure; the inductance value of the coupling window is adjusted by using the conductor choke unit, the standing-wave ratio coefficient of the coupling window is reduced, the surface temperature of the ceramic chip is reduced, and the risk of explosion of the coupling window is reduced.

A common mode choke is provided, including a hollow ferrite core, a plurality of coils wound around the ferrite core, and a substrate. Each of the coils has a first end and a second end. The substrate is disposed on the side of the ferrite core and has a plurality of through holes. The first and second ends of the coils are engaged in the through holes. When viewed along the central axis of the ferrite core, the first and second ends of the coils are located on the outer side the ferrite core.

The invention discloses a Q-band choke type dual-channel waveguide rotary joint which comprises a fixed end, a CH1 channel rotary end, a CH2 channel rotary end and a mounting assembly, and is characterized in that the fixed end comprises a flange plate outer conductor, waveguide mounting ports are coaxially formed in the two sides of the flange plate outer conductor, and waveguide mounting holes are formed in the two sides of the flange plate outer conductor; the mounting assembly comprises a fixing nut, a screw sleeve and a plurality of bearings, and a gasket is arranged between every two adjacent bearings; the CH1 channel rotating end and the CH2 channel rotating end are installed on the fixed end through the installation assembly, and good stability is provided during rotation in a non-contact clearance type installation mode, so that mechanical abrasion is reduced, and the service life is prolonged. The rotating end is installed in the fixed end through the installation assembly, loads are dispersed on a plurality of contact faces or supporting points of the rotating end, the stability and the load capacity of the waveguide rotating joint structure can be improved, the rotating end and the fixed end are installed in a clearance mode, and friction and abrasion caused by contact are avoided.

Transient signal suppression is provided. A system includes a choke. The choke includes an inner surface defining a cavity, the inner surface configured to surround a plurality of conductive elements. The choke includes an outer surface configured to couple with a housing for the plurality of conductive elements.

The invention relates to a device (10) for inductive energy transmission into a human body (1), having a transmitter coil (24) and / or a receiver coil (14) having a first magnetic core (26) and a resonance or choke coil (16, 34) having a second magnetic core (32), wherein the first magnetic core (26) forms a part of the second magnetic core (32).

The invention discloses an integrated three-phase Boost-LLC topology and a modulation method. The integrated three-phase Boost-LLC topology comprises a transformer, a primary side circuit and a secondary side circuit, wherein the primary side circuit and the secondary side circuit are connected to the two sides of the transformer; the primary side circuit comprises a preceding-stage three-phase staggered Boost circuit and a backward-stage three-phase LLC resonant circuit, the preceding-stage three-phase Boost circuit comprises six switching tubes and three choking coil inductors, the three inductors are connected between the input and the midpoint of a three-phase bridge arm, the six switching tubes are located between the positive electrode and the negative electrode of a middle bus, and the backward-stage three-phase LLC resonant circuit is located between the positive electrode and the negative electrode of the middle bus. Meanwhile, the six switching tubes are multiplexed to serve as inversion bridge arms of a post-stage three-phase LLC, and the post-stage LLC resonant circuit is connected behind the three-phase bridge arms; the secondary side circuit comprises a three-phase rectifier bridge, is composed of six switching tubes and is connected to the secondary side of the transformer, and the direct current output is connected with an output filter capacitor and a load. According to the invention, the number of devices is reduced through bridge arm multiplexing, a wide voltage regulation range is realized, and synchronous rectification is convenient to realize.

A choke plate assembly comprises a number of electromagnetic resonant structures and a dielectric material. The number of electromagnetic resonant structures suppresses electromagnetic waves travelling through the number of electromagnetic resonant structures. The dielectric material encompasses the number of electromagnetic resonant structures.

Disclosed is a plasma treatment device comprising: a chamber; a substrate support part; an introduction part; and a choke. The substrate support part is provided in a treatment space inside the chamber. The introduction part is configured to introduce electromagnetic waves into a plasma generation space. The choke is provided along the outer periphery of the treatment space in order to suppress propagation of the electromagnetic waves below the plasma generation space. The choke includes a dielectric member, a first portion, a second portion, and a plurality of coils. The dielectric member is arranged so that part of the dielectric member is exposed in the treatment space, and fills a slit of the first portion. Outside the first portion, the second portion provides a space that extends from the slit. The plurality of coils are arranged in the space of the second portion. Each of the plurality of coils is configured to be capable of changing an angle relative to the direction of the magnetic flux in the space of the second portion.

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 discloses a two-dimensional electric control beam scanning antenna and a beam control method, and belongs to the technical field of antennas. The beam control module is located below the feed structure, radiation units of the radiation unit array are connected with the microstrip line and are periodically distributed on the two sides of the microstrip line, the feed structure is connected with the feed probe, each radiation unit comprises a metal patch, a short-circuit metal column and an active electronic device, and the short-circuit metal column is connected with the active electronic device. The short-circuit metal column sequentially penetrates through the first dielectric substrate, the air guided wave layer, the metal slow wave ridge structure and the second dielectric substrate from top to bottom, the upper end and the lower end of the short-circuit metal column are connected with the metal patch and the direct-current bias network structure respectively, the second dielectric substrate is connected with the metal layer, and a choke structure of the direct-current bias network structure is connected with a bias line. The antenna provided by the invention has the characteristics of low loss, low cost, high gain and two-dimensional wide-angle scanning.

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 motor-driven compressor includes an inverter device. The inverter device includes a common mode choke coil. The common mode choke coil includes an annular core, two windings wound around the core, and an annular conductor that covers the two windings. The conductor is divided into a first metal plate and a second metal plate, which are combined to form an annular shape such that induced current flows in a circumferential direction of the conductor so as to hinder changes in leakage magnetic flux from the core. The second metal plate is thermally connected to the housing. The first metal plate is thermally connected to the second metal plate. At least one of an electrical resistance value or a thermal resistance value in a current path of the induced current is lower in the second metal plate than in the first metal plate.

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

A filter structure is provided. The filter structure includes a substrate, a capacitor element, and a first choke element. The capacitor element and the first choke element are disposed on the substrate. The first choke element has a first ferrite core, two first windings wound around the first ferrite core, and a first magnetic conductive member. The first ferrite core is received in the first magnetic conductive member and located adjacent to the first choke element.

The present disclosure relates to an isolated active EMI filter without an additional element on a power supply line to prevent noise emitted through a power supply line cable, the isolated active EMI filter comprising: a common mode choke disposed on a power supply side; a Y capacitor disposed on the EMI source side; a sensing winding sensing a current; an amplifying unit that amplifies the noise current; and the signal of the secondary coil is injected into the transformer of the Y capacitor as a compensation signal.

The common mode choke coil includes a base body, first to second coils, etc. The first coil includes first to third coil conductors arranged on the surfaces of first to third insulating layers, the first to third coil conductors are electrically connected and stacked on the first to third insulating layers in the height direction, the second coil includes fourth to sixth coil conductors arranged on the surfaces of fourth to sixth insulating layers, the fourth to sixth coil conductors are electrically connected and stacked on the fourth to sixth insulating layers in the height direction, the second coil conductor and the third coil conductor are electrically connected via a first outer via hole conductor arranged at a position overlapping with the outer peripheral side ends of the second and third coil conductors when viewed from the height direction, and a first dummy conductor is provided on the surface of at least one insulating layer of the first, fourth, fifth and sixth insulating layers other than between the second insulating layer and the third insulating layer, overlapping with the first outer via hole conductor when viewed from the height direction and electrically insulated from all the coil conductors.

The invention provides an antenna system and electronic equipment, and the antenna system comprises a first antenna and a second antenna which are relatively far away from each other on a frame of the electronic equipment, the first antenna and the second antenna are configured to have working frequency bands at least comprising a Bluetooth frequency band, and the antenna system also comprises at least one third antenna, the third antenna is disposed on a current conduction path of the first antenna and the second antenna, and the third antenna is configured to generate a resonant mode including a Bluetooth frequency band. According to the embodiment of the invention, the third antenna is arranged on the current conduction path of the first antenna and the second antenna, so that a choke effect is formed at the position of the third antenna when the induction current of the Bluetooth frequency band is transmitted along the metal frame, thereby improving the isolation degree of the independent Bluetooth antenna and a traditional Bluetooth / WiFi antenna, and improving the user experience. According to the embodiment of the invention, high-availability coexistence of the independent Bluetooth and the Bluetooth / WiFi antenna is realized, and the independent Bluetooth antenna is added, so that the Bluetooth performance of the electronic equipment can be effectively improved, and the Bluetooth transmission rate and stability are improved.

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.

To provide a power supply circuit that can achieve a high noise suppression effect with a relatively simple configuration, and a motor unit having the power supply circuit.SOLUTION: In a motor unit, a power supply circuit 2 for converting an AC input into a DC output includes a first capacitor 30, a common mode choke coil 10 having magnetically coupled first coil 11 and second coil 12, one end of each of the coils being electrically connected to an AC input, a rectifier circuit 60 that is electrically connected to the other end of each of the coils and rectifies the AC input into a DC output, a smoothing circuit 70 for smoothing the DC voltage output from the rectifier circuit through a pair of wires, a second capacitor 90, and a body earth terminal P5 that is electrically connected to an external metal member. The first capacitor is electrically connected between one end of the first coil and one end of the second coil, and the second capacitor is electrically connected between one wire of a pair of wires L3 and L4 and the body earth terminal, the one wire having lower potential than the other wire.SELECTED DRAWING: Figure 2

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 embodiment of the present application provides an antenna and a base station device, which relates to the field of communication technology and can reduce interference between radiation units of different frequency bands, thereby improving the coverage capability of the antenna and improving communication performance. The antenna includes: a plurality of first frequency band antenna groups; a plurality of second frequency band radiation units; a reflection plate through hole is arranged on the reflection plate; each first frequency band radiation unit includes: a first balun structure, the first balun structure passes through the reflection plate through hole; a first signal transmission structure, the first signal transmission structure passes through the reflection plate through hole; the phase shifter includes a first phase shifter cavity, a choke cavity and a first feed network signal transmission structure located in the first phase shifter cavity, and the part of the first balun structure in the first frequency band radiation unit located on the second side of the reflection plate is located in the choke cavity; in each first frequency band antenna group, the first signal transmission structure in each first frequency band radiation unit is electrically connected to the first feed network signal transmission structure.

A microwave antenna assembly is disclosed. The antenna assembly includes a feedline having an inner conductor, an outer conductor and an inner insulator disposed therebetween. A radiating portion is also included having an unbalanced dipole antenna including a proximal portion and a distal portion that are of different lengths. The proximal portion includes at least a portion of the inner conductor and the inner insulator and the distal portion includes a conductive member.

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.