74 results about "Coupling (electronics)" patented technology

A wearable ultrasound device and method of using the device includes a power controller with a power source and at least one integrated circuit that delivers electrical power to an applicator. The applicator is electrically coupled to the power controller and a surface of the applicator transmits ultrasound to a wearer for a given duration. The applicator includes radio frequency (RF) drive electronics, an ultrasound transducer coupled to the drive electronics, a monitoring apparatus that includes a thermal cutoff coupled to the drive electronics, where the monitoring apparatus monitors a temperature of the applicator surface and the thermal cutoff turns off the applicator, if the temperature exceeds a pre-defined threshold, and a coupling bandage coupled to the applicator, where the bandage positions the surface of the applicator proximate to a wearer at a location on the body of a wearer.

The invention provides a middle distance flat-plate wireless power transmission system based on magnetic resonance coupling. A complanation structure is adopted by the wireless power transmission system, and the system can be processed through a plate-making mode of a printed circuit board. Coil coplanar design is further adopted by the system, by placing an exciting coil (102) and a transmitting terminal resonance coil (101) on the same side of a dielectric substrate, meanwhile, by placing a loading coil and a receiving terminal resonance coil on the same side of the dielectric substrate, a bottom layer of the printed circuit board can be used for adding adjustable electronic parts and components, matching a circuit and rectifying a voltage regulator circuit, and the integration level of the system is improved. A parasitism structure is further adopted by the system, by utilizing a parasitic coil to the resonance coils, the coupling intensity among magnetic coupling resonance coils is strengthened, the transmission efficiency is improved, and the transmission distance is increased. The invention further provides a design and application scheme of a point-to-multipoint wireless power transmission system, and the wireless charging and electricity supplying to multiple consumer electronics, communication equipment and LED lighting equipment are achieved simultaneously.

Various methods and systems are provided for a flexible, lightweight, and lowcost radio frequency (RF) coil of a magnetic resonance imaging (MRI) system. In one example, a RF coil assembly for an MRI system includes a distributed capacitance loop portion comprising at least three distributed capacitance conductor wires encapsulated and separated by a dielectric material, a coupling electronics portion including a preamplifier, and a coil-interfacing cable extending between the coupling electronics portion and an interfacing connector of the RF coil assembly.

The invention relates to an electromechanical cylinder lock that interacts with evaluation electronics for identifying access authorizations and has a housing that includes two opposing cylinder receptacles (12) in which each is rotatably accommodated A key-operated lock cylinder or a knob-shaped door handle shaft (11) connected in a rotationally fixed manner to the knob, wherein the lock cylinder and/or the knob-shaped shaft (11) is in particular connected to the bolt or to the actuating door lock The lock noses (13) of the lock lock work together, and when the key is engaged or the access authorization authentication is completed, the lock or connecting part (14) of the electromechanical transmission moves from the rest position into the effective position and produces the key or ball. Torsion-resistant connection between the door handle and the lock nose (13), characterized in that the lock nose (13) can be locked relative to the two lock cylinders or the two spherical door handles in the rest position of the locking or connecting piece (14) The shaft (11) rotates freely.

The invention discloses a double-coil coupling inductance type impedance source inverter for suppressing a direct-current link voltage peak, and belongs to the technical field of power electronics. The double-coil coupling inductance type impedance source inverter solves the problem that an existing double-coil coupling inductance type impedance source inverter is prone to causing breakdown of a switching device due to the fact that the voltage peak of a direct-current chain is too high. The inverter comprises an inverter bridge circuit, a power supply circuit and a clamping circuit, the powersupply circuit comprises a direct-current power supply Vin, an inductor Lin, a diode D1, a double-coil coupling inductor unit and a capacitor C1; the clamping circuit comprises a capacitor C2, a capacitor C3 and a diode D2; the inverter bridge circuit is used for supplying power to a power grid or a load. According to the invention, energy consumed on a switch tube in a voltage peak form can be recycled, and the efficiency of the inverter is further improved.

The invention relates to a distributor module that is used to distribute electrical power to at least two connected measuring devices (S1, S2) and to forward information sent by the at least two connected measuring devices regarding at least one physical measurement variable to at least one higher-order electronic data processing unit (NLU). For this purpose, the distributor module comprises a module housing (100) and module electronics placed inside the module housing (100). Furthermore, two or more connection units are each provided in the distributor module for one of the measuring devicesproviding measurement data, each connection unit comprising a transmitter coil connected to the module electronics and placed within the module housing to form an inductively coupled interface that transmits data and electrical energy, and at least one connection unit is provided for the at least one data processing unit, wherein each of the transmitter coils is placed within a plug-in connector element that is composed at least partially of plastic and that is used to form a plug-in connector coupling. It is further provided that the distributor module is used in a measuring system used to measure at least one physical and/or at least one chemical measurement variable.

The invention discloses a low-ripple soft-switching Cuk converter circuit and a modulation method, and belongs to the field of power electronics, and the low-ripple soft-switching Cuk converter circuit comprises a link energy storage capacitor C1, a resonant capacitor Cs, an output filter capacitor Co, a resonant branch diode Dax, main switching tubes Q1 and Q2, an auxiliary resonant switching tube Qax, an input inductor L1, an output inductor L2, a resonant inductor Lax and a coupling inductor M after the L1 and the L2 are coupled. The converter realizes zero-voltage conduction and zero-current turn-off of the main switch tube Q1, zero-voltage conduction of the main switch tube Q2 and zero-current turn-off of the anti-parallel diode DQ2 by controlling conduction and turn-off of the main switch tubes Q1 and Q2 and the auxiliary resonant switch tube Qax. The invention has the advantages that: 1) the output current ripple is small, and the power factor is high; 2) the link energy storage capacitor is designed in a critical conduction working mode, and a small-capacitance non-electrolytic capacitor can be used to replace an electrolytic capacitor; and 3) the soft switching function of main switching devices of the converter is realized, and the coupling inductance technology reduces the output ripple of the converter.

The invention discloses a high-order backward wave oscillation suppression structure for a strip beam traveling wave tube, and belongs to the technical field of microwave electronics and terahertz. The structure comprises a shell and rectangular gates arranged on the upper top face and the lower bottom face of an inner cavity of the shell in a staggered mode, the two side faces of the shell are each provided with a column of rectangular coupling waveguides which are the same in size and arranged periodically, and the two columns of rectangular coupling waveguides are staggered by half a slow wave period in the axis direction and are also designed in a staggered mode in the longitudinal direction. And one rectangular coupling waveguide corresponds to one rectangular cavity. By loading the staggered rectangular coupling waveguides on the two sides of the slow-wave structure, suppression and absorption of a high-order mode are synchronously realized on the premise of not influencing and not damaging a working mode.

The embodiment of the invention provides a self-coupling capacitor detection method and circuit, and relates to the field of electronics. The self-coupling capacitor detection method and circuit solve the problem that according to a common self-coupling capacitor detection scheme, the speed is not stable. The method specifically includes the steps of sending an emission signal with a fixed pulse number in a preset fixed cycle, receiving a first receiving signal and a second receiving signal of the emission signal which passes a load through a receiving port, judging a change value delta C of a self-coupling capacitor at the receiving port by comparing the voltage difference of the first receiving signal and the second receiving signal at a rising edge and a falling edge, and judging that a touch even occurs at a touch port connected with the receiving port when the change value delta C of the self-coupling capacitor exceeds a preset comparison value. The self-coupling capacitor detection method and circuit are used for detecting the self-coupling capacitor.

The invention relates to a voltage conversion device and a three-phase voltage conversion device, and belongs to the technical field of power electronics. The device comprises: at least a voltage input end and a voltage output end; at least one main magnetic induction assembly, provided with a first notch; at least one auxiliary magnetic induction assembly, provided with a second notch corresponding to the first notch; at least one input coil, connected with the at least one voltage input end; an output coil, connected with the voltage output end; and at least one magnetic induction adjustingassembly, arranged between the first notch and the second notch, can move and used for adjusting the voltage of the voltage output end. Therefore, the movable magnetic induction adjusting assembly isarranged between the first notch and the second notch to change the magnetic path so as to adjust the coupling degree of the output coil and the input coil, online stepless adjustment of the amplitudeand/or the phase of the output voltage can be achieved, the structure is simple, and complex operation of changing connecting wires is avoided.

The invention provides a multi-phase structure and parameter symmetrical integrated magnetic component of a magnet yoke closed type, and relates to the technical field of power electronics application. The transformer comprises an iron core, a multi-phase primary winding and a multi-phase secondary winding; the iron core comprises a magnet yoke, a plurality of main magnetic columns and auxiliary magnetic columns. The magnet yoke is of a closed symmetrical loop structure. One ends of the plurality of main magnetic columns are connected, and the other ends of the plurality of main magnetic columns are respectively connected with the magnet yoke; included angles among the plurality of main magnetic columns are equal, the plurality of auxiliary magnetic columns are symmetrically positioned among the plurality of main magnetic columns, and the multiphase primary side winding and the multiphase secondary side winding are symmetrically wound on the plurality of main magnetic columns. The beneficial effects of the invention are that the multi-phase structure and parameter symmetrical integrated magnetic component is used for magnetic coupling integration of multi-phase inductors and transformers in power conversion circuits of various non-isolated multi-phase parallel switching power supplies and isolated multi-phase parallel switching power supplies, structural symmetry and equal parameters of the multi-phase magnetic integrated inductor and the transformer are achieved, and high-power output of the multi-phase parallel switching power supplies and automatic balance of currents ofall phases are achieved.

A mobile device (10) including a housing having a distal end, and electronics (18) disposed in the housing configured to operate the mobile device (10). A connector (30) is coupled to the electronics (18), and a Pi-shaped antenna (12) has a coupling coupled to the connector (30) to create a resonance using the connector (30). The Pi-shaped antenna (12) and the connector (30) are configured to wirelessly send and receive the wireless signals. An impedance matching network (14) matches the impedance of the electronics (18) to the Pi-shaped antenna (12). The impedance matching network (14) is switchable by the electronics (18) and is configured to match an impedance of the electronics (18) to the Pi-shaped antenna (12) in at least two states, over multiple RF bands.

The invention relates to the technical field of electronics and microelectronics, and discloses a high-end level shift circuit, a high-end power control circuit and an anti-interference method. The high-end level shift circuit adopts a cross coupling mode and comprises a first coupling module and a second coupling module which are in cross connection with each other; and a capacitor is used as a load. The high-end power control circuit comprises the high-end level shift circuit. Therefore, the high-end level shift circuit and the high-end power control circuit have stronger anti-interference characteristics. The anti-interference method is performed based on the high-end power control circuit, and can prevent the high-end level shift circuit from mistakenly considering the noise signal as a normal signal, so that the high-end level shift circuit transmits the noise signal to a subordinate circuit. Therefore, the interference of noise signals on the whole circuit is prevented.