305 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.

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).

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.

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 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 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.

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.

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.

An electric choke and a system and method for removing energy from the electric choke are provided. The system includes one or more magnetic cores, at least one inductive coupler, and a resistor. The one or more magnetic cores are configured to form a portion of the electric choke by generating magnetic energy. The at least one inductive coupler is operable to convert the magnetic energy into electrical energy. The resistor is electrically connected to the at least one inductive coupler and is operable to dissipate the electrical energy as heat.

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.

Compensated choke (1) with the following features: - a magnetic core (10,20,30,40), - the magnetic core (10, 20, 30, 40) has at least two legs (10, 20) which are each connected to one another at their ends by a yoke (30, 40), - each of the legs (10, 20) is formed by at least one magnetic segment (50), - a coil device (N1a, N2a, N1b, N2b) is wound around each of the legs (10, 20), wherein - a first of the legs (10) has a first coil (N1a) in an upper section (10a) and a second coil (N2a) electrically insulated from the first coil (N1a) in a lower section (10b), - a second of the legs (20) has a third coil (N2b) in an upper section (20a) and a fourth coil (N1b) in a lower section (20b), - the first coil (N1a) and the fourth coil (N1b) are connected to each other via a first electrical line (L1) or are prepared and intended to be connected to each other, and - the second coil (N2a) and third coil (N2b) are connected to each other via a second electrical line (L2) or are prepared and intended to be connected to each other.

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 provide an envelope tracking system in which changes in power amplifier supply voltage arising from envelope tracking are compensated.SOLUTION: An envelope tracking system includes a power amplifier 250 that receives power from a power amplifier supply voltage VPA and amplifies a radio frequency (RF) signal RFIN. The power amplifier includes: an envelope tracker that generates the power amplifier supply voltage based on an envelope of the RF signal; a Wilson current minor 232; and a field-effect transistor NFET 231 for amplifying the RF signal. The Wilson current mirror includes: an input that receives a reference current IREF from a reference current source 236; and an output connected to the power amplifier supply voltage. The NFET amplifies an RF input signal to generate an RF output signal RFOUT. Additionally, a gate of the NFET is biased by an internal voltage of the Wilson current mirror and a source receives a ground voltage, while a drain receives the power amplifier supply voltage from a choke inductor 235.SELECTED DRAWING: Figure 3

Technologies directed to a radio frequency (RF) boundary choke between modules in phased array antennas. An antenna module may include a circuit board having one or more conducting layers and one or more electrically insulating layers. The antenna module may include an antenna disposed on a first surface of the circuit board. The antenna module may further include radio frequency front end (RFFE) circuitry disposed on a second surface of the circuit board. The antenna module further includes a first set of vias extending between the antenna and the RFFE circuitry and a second set of vias disposed within the circuit board. Each of the second set of vias is positioned along a first axis parallel to and a first distance from a first edge of the antenna module.

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.