633 results about "Current conduction" patented technology

An exemplary shock wave catheter system comprises: a catheter body comprising a lumen; an emitter wire configured to generate shock waves, wherein one or more gaps are formed between two or more portions of the emitter wire along a length of the catheter body, each of the one or more gaps forming a locus emitter; a carrier wire configured to conduct electricity to the emitter wire; and one or more electrical joints configured to electrically couple and join the emitter wire and the carrier wire.

The invention relates to a micro-display device based on multilayer stacking and a preparation method thereof, the micro-display device comprises a driving backboard and a plurality of pixel layers, and the driving backboard is provided with a first type of electrode contacts; the multiple pixel layers are sequentially stacked in the Z direction, sub-pixels are arranged in each pixel layer, the bottom end of each sub-pixel is electrically connected to the corresponding first type of electrode contact, and the top end of each sub-pixel is electrically connected to the corresponding first conductive layer; in two adjacent pixel layers in the multiple pixel layers, the first conductive layer of one sub-pixel in the upper pixel layer is in direct contact with the first conductive layer of one sub-pixel in the lower adjacent pixel layer. The invention also discloses a preparation method of the micro display device. According to the invention, the processing technology and the cathode interconnection structure are simplified; and meanwhile, the current conduction capability is enhanced, the power consumption of the device is reduced, and the reliability and stability of the display device are improved.

The invention relates to the technical field of circuit board performance detection, in particular to an intelligent test management system and method for a circuit board. The method comprises the following steps: continuously monitoring the current conduction amount of the hole site of the circuit board; when it is detected that the current conduction amount is lower than a preset current conduction amount threshold value, it is judged that the current conduction state of the hole site is abnormal, and abnormal state time and abnormal initial site coordinates are recorded; acquiring a circuit board hole site image according to the abnormal initial site coordinate; and identifying hole site internal characteristics of the circuit board hole site image, extracting a defect area of the hole site internal characteristics, and marking the defect area as a hole site potential defect area. Through the data processing technology, the laser scanning technology and the image detection technology, abnormal current conduction judgment on the hole site of the circuit board is achieved, the defect area image of the abnormal hole site of the circuit board is recognized, the defect optimization scheme of the circuit board is determined, and therefore the accuracy of circuit board testing is improved.

The invention discloses a cover plate assembly, a battery and a battery module, and belongs to the technical field of power batteries. The cover plate assembly comprises a cover plate piece and a pole piece, the cover plate piece is provided with a mounting hole, and the pole piece is positioned in the mounting hole and is insulated from the cover plate piece; a groove structure is arranged on the end face, located on the inner side of the cover plate piece, of the pole piece, the groove structure is used for containing a tab of a battery cell, and the inner side wall of the groove structure is connected with the tab in a welded mode. According to the cover plate assembly, the current conduction path can be greatly shortened, and the connection impedance and the contact resistance of the battery are reduced. Meanwhile, the cover plate assembly reduces the potential failure risk caused by multi-component assembly and multiple welding.

The invention discloses a silicon carbide power module, which comprises a top diamond micro-channel heat dissipation layer, a bottom diamond micro-channel heat dissipation layer, an upper diamond layer, a middle diamond layer and a lower diamond layer, and is characterized in that an upper current conducting layer is arranged between the upper diamond layer and the middle diamond layer; a lower current conducting layer is arranged between the middle diamond layer and the lower diamond layer, a plurality of power chips are embedded in the middle diamond layer, and the power chips are electrically connected with the upper current conducting layer and the lower current conducting layer. According to the silicon carbide power module, the diamond heat dissipation layers integrated with the micro-channels are arranged at the top and the bottom respectively, the heat exchange efficiency and the heat dissipation effect of the power module can be effectively improved, an external heat dissipation device is not needed, the structure is simpler, special heat dissipation can be conducted on the area where the power chip is located, and the service life is prolonged. And the purposiveness and the effectiveness of heat dissipation are higher.

A semiconductor device and a power conversion device each comprise a drift layer, a gate electrode to face a well region and a source region via a gate insulating film, a source electrode provided on an interlayer insulating film covering the gate electrode and connected to the well region and the source region, a first separation region provided in an active region in which a plurality of MOSFETs each including the well region, the source region, and the gate electrode are arranged in the drift layer, the first separation region being provided to be connected to the drift layer and forming Schottky connection with the source electrode, and a surge current conduction region provided in the active region, and blocks connection between the source electrode and the drift layer, thereby enabling the achievement of a semiconductor device and a power conversion device that exhibit high surge tolerance.

The invention discloses an excitation loss fault-tolerant control method and system of an electro-magnetic doubly salient motor, and belongs to the field of motor control. On the basis of rotating speed current double closed-loop control, the control mode of a current loop is improved, two electric cycles are divided into six current conduction states, the conduction state of a power tube is obtained in combination with a converter topological structure after motor excitation loss, the direction of three-phase current is changed, and therefore the commutation process of the current is optimized, and the current conversion efficiency is improved. The amplitude of current change is reduced, the torque pulsation of the motor after excitation loss is reduced, and the torque current ratio is improved. According to the invention, the problem that the torque pulsation is large and the torque current ratio is low when the electro-magnetic doubly salient motor adopts a traditional field loss fault-tolerant control strategy is solved. By changing the conduction sequence of the power tubes, the purposes of suppressing the torque ripple of excitation loss operation of the electro-magnetic doubly salient pole and reducing copper consumption are achieved, the algorithm control is simple, and the portability is high.

The invention discloses a wind generating set blade lightning protection resistor detection tool and detection method in the technical field of wind power generation equipment detection, and the wind generating set blade lightning protection resistor detection tool is of a hollow elliptical conical brass skeleton matched pure copper wire mesh structure. The profile curve is matched with the appearance of the blade tip of the wind generating set, and fixed connecting points are arranged on the two sides of the cone bottom and the cone top of the brass framework. High-strength brass is adopted as a framework structure, and the stability and durability of the tool are ensured by means of the excellent mechanical property of the high-strength brass; meanwhile, a low-resistance pure copper wire mesh is selected as a conductive part, so that the high efficiency of current conduction is guaranteed. And three fixed connection points are elaborately designed on the two sides and the top of the brass framework, so that the tool can be conveniently and stably mounted and fixed with a detected part, the reliability of the tool in the use process is ensured, and great convenience is provided for field detection operation.

The invention discloses a silver nanowire network film and a welding method, and relates to the technical field of nano material processing and flexible electronic device manufacturing, and the welding method comprises the following steps: taking a polyester film as a substrate, taking silver nanowires, and placing the silver nanowires in ethanol to prepare a silver nanowire dispersion liquid; spin-coating the silver nanowire dispersion liquid on a substrate, and drying to form a silver nanowire network electrode; a focused light scanning system is adopted to weld the silver nanowire film, a xenon lamp light source is adopted to form a light spot through focusing of a convex lens, an XY motor drives a platform to drive a silver nanowire network electrode to perform two-dimensional motion, and the light spot scans a to-be-welded area of the silver nanowire network electrode according to a preset path for welding; and naturally cooling to obtain the silver nanowire network film. Uniformity and stability of current conduction of the electrode network are guaranteed, and comprehensive and efficient node welding is achieved.

The utility model belongs to the technical field of batteries, and discloses a battery shell and a battery, the battery shell comprises a shell body and a cover plate assembly, the shell body is a hollow shell mechanism with an opening at one side, the cover plate assembly comprises a cover plate body, a first insulating part and a composite pole, the cover plate body is arranged at the opening of the shell body and seals the shell body, and the composite pole is arranged on the first insulating part. The cover plate body is used for forming an accommodating cavity for accommodating a pole group, the cover plate body is provided with a first penetrating structure through which a lug extends out of the accommodating cavity, the first insulating part is arranged on the cover plate body in an injection molding manner and is used for isolating the cover plate body from the lug, and the composite pole column is arranged on one side, deviating from the pole group, of the cover plate body and realizes current conduction with the lug. Through the arrangement of the first penetrating structure, the tab can realize current conduction with the composite pole located on the outer side of the accommodating cavity through the first penetrating structure, so that the space occupied by the composite pole and the space for connecting the bent tab with the composite pole are saved, the extra space occupation is reduced, the volume of the pole group can be further increased, and the energy density is improved.

Circuits and methods are provided that more effectively and efficiently implement multi-level converter circuits. A switched mode power supply is configured to be coupled between a reference potential and a voltage input source Vin, and includes a terminal configured to source an output voltage Vout and an output current Iout to a load. A current-sensitive element coupled between voltage input source Vin and the switched mode power supply conducts an input current Iin to the switched mode power supply and provides a sensing voltage related to input current Iin. An analog to digital converter provides digital representations of analog voltages presented thereto. A controller receives digital representations from the analog to digital converter and estimates output current Iout based upon the digital representations and an efficiency factor Eff.

A first ECU (control device) controls power supplied through a power supply switch, by turning the power supply switch on or off. A second ECU (switching device) turns a power switch on or off. In the first ECU, a processing unit executes non-power supply control processing different from processing relating to control of power supplied through the power supply switch. After a current conduction fault in which a current flows through the power supply switch despite an instruction being given to turn off the power supply switch is detected, the second ECU alternately turns the power switch on and off repeatedly.

An instrument for argon plasma surgery includes a plastic hose and an electrical conductor extending therethrough, which is formed by a thread of carbon fibers or a flexible or rigid body including carbon fibers. The carbon fibers serve for current conduction and thermal cooling of the plasma foot point which forms directly at the end of the electrical conductor at the carbon fibers or in a compact body in contact with the latter. The electrical conductor is arranged inside the lumen of the hose without being centered and thus without forced contact to the inner wall of hose. The high thermal conductivity of the conductor in the longitudinal direction results in a low thermal stress of hose. Due to this construction, the instrument can be provided with halogen-free plastics, advantageous for thermal disposal of the instrument.

The present application relates to the technical field of batteries, and provides a cell welding structure, a welding method, and a battery. The cell welding structure comprises: a winding body; a plurality of tab groups formed at an end portion of the winding body, the plurality of tab groups being radially arranged around the center of the winding body; and a current collector, welded to the side of the plurality of tab groups facing away from the winding body to form a plurality of welding spots. The present application can improve the uniformity of current conduction between die-cut tabs and electrode sheets, reduce the amount of current loss, reduce the number of welding spots, and improve work efficiency.

The invention relates to the technical field of sensitive amplifier circuits, and particularly discloses a self-feedback upper cross coupling sensitive amplifier circuit and a control method thereof.The circuit comprises an input circuit, an upper cross coupling circuit and a self-feedback circuit; the input circuit comprises two NMOS (N-channel Metal Oxide Semiconductor) and two PMOS (P-channel Metal Oxide Semiconductor), each NMOS is connected between one output node and the VSS, and the current conduction of the NMOS is controlled by one PMOS; two PMOS (P-channel Metal Oxide Semiconductor) in the upper cross coupling circuit are in cross connection between two output nodes and a VDD (Voltage Drain Drain) and are used for controlling the VDD to charge one of the output nodes according to the voltage between the two output nodes; each PMOS in the self-feedback circuit is connected between one PMOS and the VSS of the input circuit, and the current conduction of the PMOS is controlled by one output node so as to cut off one NMOS in the input circuit. According to the self-feedback upper cross-coupling sensitive amplifier circuit and the control method thereof disclosed by the invention, the offset voltage and power consumption of the sensitive amplifier circuit can be reduced.

The utility model relates to the technical field of electronic device manufacturing, conductive connection and the like, and provides a conductive slip ring take-up device which comprises a wire connecting terminal and an elastic sheet connecting terminal. A conductive coil of the wire connecting terminal is arranged on one side of the insulating inner shell, and a conductive wire is installed on the other side of the insulating inner shell and connected with the conductive coil. The conductive elastic sheet of the elastic sheet connecting terminal is arranged on the insulating outer shell, the insulating outer shell is rotatably connected with the conductive coil fixing side of the insulating inner shell, the conductive elastic sheet comprises a coil elastic contact head, and the coil elastic contact head is in contact with the conductive coil. According to the conductive slip ring take-up device, a PIN seat does not need to be welded on the PCB, and an elastic piece does not need to be welded on the PIN seat to be in contact with an electroplated layer on the PCB for conduction, so that the assembly of the device is simplified, the use of a PCB electroplating process is avoided, the environmental protection property and the efficiency of manufacturing are improved, a powder accumulation short circuit caused by the contact of the elastic piece with the electroplated layer of the PCB is avoided, large-current conduction is supported, and the service life of the device is prolonged. And the safety and the stability of the device are improved.

A high-safety transistor testing system and method with nanosecond-level delay is disclosed, belonging to the field of transistor testing. It enables transistor characteristic testing under arbitrary drain voltage stress values, drain voltage stress durations, and load currents based on nanosecond-level measurement delays, while ensuring the safety of the testing system and personnel. The circuit includes: a switch. S 1, S 2, S 3. Resistance R A , R C Schottky diode D 1, D 2. Power Inductor L ,power supply V DD Control switch S 1. The conduction time can control the high voltage that the subsequent circuit can withstand. V DD Duration; control switch S 2. On-time can control the power inductor L Current value at the end of charging; test switch S From the voltage and current of 3, we can determine the switch. S 3. Switching transient characteristics, on-resistance characteristics, etc. Simulation and experiments show that the measurement delay of switching to the test state after the drain voltage stress ends is on the order of nanoseconds, and there is no situation of "accidental opening of series switch leading to large current conduction", so the circuit safety is higher.

Electrodes configurable for capacitive touch sensing or inductive sensing are disclosed. The electrodes are formed from a plurality of tiled (connected) sense pixels, each sense pixel including two or four conductive elements. The conductive elements within the plurality of sense pixels of an electrode are connected to form conductive pathways within the electrode. These conductive pathways enable each electrode to be configured as a touch electrode for single-ended or differential capacitive touch sensing, or into one or two loops for inductive sensing. In pixels with four conductive elements, two conductive elements are formed with a comb shape for maximizing current conduction during inductive sensing and maximizing capacitive coupling during touch sensing, and two conductive elements are formed as bypasses. In electrodes formed from sense pixels with four conductive elements, each conductive pathway within the electrode is formed as an alternating series of comb-shaped conductive elements and bypasses.

The invention relates to the technical field of semiconductor device manufacturing, in particular to an FRD process control method with the characteristic that forward conduction voltage drop is positive temperature, and the method comprises the following steps: S1, ring base region process, S2, cut-off ring process, S3, Control process, S4, PT sputtering, S5, Pt kill, S6, metallization, S7, irradiation treatment, S8, back thinning, and S9, back gold process. In particular, through comprehensive application of the implantation dosage of boron ions, the diffusion condition of a platinum layer and electron irradiation, the method can ensure that the FRD has optimized performance that the forward conduction voltage drop is approximate to zero temperature or the positive temperature characteristic; and the forward conduction voltage drop can be kept in a relatively stable range and can also be improved along with the temperature rise, so that the current conduction capability and the thermal stability of the parallel device are improved.

A high-current connection system includes a high-current-conducting bridging part which can be fastened to each of two high-current busbars and by which the distance between the high-current busbars can be current-conductively bridged and with which at least two spaced-apart spherically inwardly domed connection faces are associated, for each high-current busbar, a high-current-conducting compensation element which can be disposed between the bridging part and the associated high-current busbar and which has a spherically outwardly domed compensation face which, when the bridging part is in the fastened state, faces one of the spherically inwardly domed connection faces, and is electrically connected thereto, and for each high-current busbar, at least one fastening element which can be associated with the high-current busbar, and by means of which the bridging part and the associated compensation element can be fastened to the associated high-current busbar and secured against movement relative to the associated high-current busbar.

The wire frame wire conveying mechanism comprises a machine tool base, a machining table is arranged on the front side of the upper end of the machine tool base, a wire conveying control table is arranged on the rear side of the upper end of the machine tool base, an adjusting sliding plate is arranged at the upper end of the wire conveying control table, and a wire conveying rolling shaft is arranged at the upper end of the adjusting sliding plate. A supporting frame is arranged between the machining table and the wire conveying control table, the lower end of the supporting frame is fixedly connected to the upper end of the machine tool base, the tension of a cutting wire is finely adjusted by a tensioning roller through threaded connection of an adjusting screw rod and a sliding frame, it is guaranteed that the tension of the cutting wire is uniform in the machining process, vibration is reduced, wire breaking is avoided, and the machining precision is improved; the motor mechanism is stably and electrically connected with the cutting line through the conduction sliding rod and the conduction rolling wheel, it is ensured that the conduction rolling wheel is tightly attached to the cutting line through the attaching spring, the stability of current conduction can be kept even when the cutting line moves, and the electric spark discharge effect in the machining process is ensured.

The invention discloses a low dropout linear regulator with bidirectional current conduction capability, which is characterized in that two input ends of an error amplifier are respectively connected with signals VB and FB, and a power level of a linear transconductance ring is used as a light load power level; the first output end of the error amplifier is connected with the first input end of the linear transconductance ring, the first input end of the light load power level and the input end of the first source follower, and the output end of the first source follower is connected with the first input end of the heavy load power level. The second output end of the error amplifier is connected with the second input end of the linear transconductance ring, the second input end of the light load power level and the input end of the second source follower, and the output end of the second source follower is connected with the second input end of the heavy load power level. The problem that the quiescent current of a traditional bidirectional current conduction LDO is too large under the conditions of light load and no load is solved, and it is guaranteed that the output power tube can be completely conducted when the LDO works in an open loop mode.

The invention relates to the technical field of motors, in particular to a driving motor with a commutator automatic maintenance function. Comprising a controller, a mounting ring, photosensitive sensors, connecting blocks, sliding plates, grinding blocks and the like, the controller is mounted on the outer wall of a shell, the mounting ring is connected to the inner wall of the shell, a rotating shaft and a commutator rotationally penetrate through the middle of the mounting ring, the photosensitive sensors are mounted on the mounting ring, the connecting blocks are symmetrically connected to the outer wall of the shell, and the sliding plates are slidably connected into the connecting blocks; polishing blocks are connected to the side faces of the sliding plates. Through cooperation of the photosensitive sensor, the electromagnet and the polishing block, sparks generated between the electric brush and the commutator can be automatically detected, then the polishing block can be controlled to be tightly attached to the surface of the commutator for polishing and cleaning, sediments on the surface of the commutator can be effectively removed in the process, and an insulating layer is prevented from being formed; in addition, the problem of poor current conduction caused by accumulation of the carbon powder can be avoided, so that the commutator does not need to be manually and regularly disassembled and maintained.

The present invention belongs to the field of battery technology and discloses a battery assembly method and a battery, the method comprising: S1, placing a protective end plate on a first surface of a pole group provided with a pole ear; S2, coating an insulating film on multiple side surfaces and the outer side of the second surface of the pole group, and hot-melting the insulating film and the protective end plate to form a pole group unit; S3, installing the pole group unit into the cavity of a battery shell; S4, placing a composite cover plate on the open portion of the battery shell; S5, welding the composite cover plate to the battery shell; S6, welding the composite pole post to the composite shell; S7, achieving current conduction between the composite pole post and the pole ear. By finally achieving current conduction between the pole ear and the composite pole post, the influence of other welding processes on the connection quality between the pole ear and the composite pole post is avoided, and the pole ear achieves current conduction with the composite pole post by extending out of the battery shell, reducing the space occupied by the internal space of the battery shell, improving the space utilization, increasing the pole group volume, and improving the energy density.

The disclosure relates to a power device (100), comprising: an n-type doped silicon carbide drift layer (103); a p-type doped well (104); an n-type doped source contact (106); an n-type doped substrate (101) acting as a drain contact; and a composite gate dielectric layer (111, 112) comprising a first dielectric layer (111) contributing to a first gate threshold voltage (V1) of the power device and a second dielectric layer (112) contributing to a second gate threshold voltage (V2) of the power device which is occasionally lower than the first gate threshold voltage (V1). The first dielectric layer (111) is overlapping the n-type doped source contact (106) and a first portion of the p-type doped well (104) to enable formation of a first part of a gate electrons channel (107). The second dielectric layer (112) is arranged above the remaining portion of the p-type doped well (104) to enable formation of the remaining part of the gate electrons channel (107) and thus current conduction through the gate electrons channel (107) in case that the second gate threshold voltage (V2) reaches the first gate threshold voltage (V1).

The invention provides a welding piece for battery welding and a welding device, and belongs to the technical field of welding devices. The welding piece for battery welding comprises a base material made of a conductive material, and the base material is electrically connected with an electrode during welding. A current guide structure is arranged on the base material, and a current path is formed among the multiple layers of tabs or the composite current collector when the current guide structure is welded; the base material is further provided with a temperature sensing assembly, the physical state of the temperature sensing assembly changes within a preset temperature interval, and a temperature feedback signal is output. The welding piece can be used for welding the battery tabs, contact resistance between the tabs (foils) can be reduced or eliminated through the flow guide structure, current conduction during welding is achieved, and therefore the welding quality of the tabs is improved.

The utility model provides a rechargeable wall lamp device. The rechargeable wall lamp device comprises a mounting seat, a control module, a storage battery module, a connecting seat and a light source rod, according to the charging wall lamp device, detachable connection and current conduction between the control module and the storage battery module, between the control module and the connecting base and between the connecting base and the light source rod are achieved in a magnetic attraction matching mode, a traditional wiring connection mode is omitted, and therefore the overall structure of the device is simplified, and mounting and dismounting are convenient. The rechargeable wall lamp device not only can be fixed on a vertical wall surface, but also can be fixed on a ceiling (namely a horizontal wall surface), and the mounting position of the rechargeable wall lamp device is more flexible and is not limited. Meanwhile, the outer sleeve can drive the light source rod to rotate around the central axis (namely the front-back direction) of the connecting base, and the light source rod can also rotate around the central axis of the connecting arm, so that flexible adjustment of the angle of the light source is achieved, and the use requirements of users are met to the maximum extent.

The embodiment of the invention provides an ice melting loop of an urban rail train and the urban rail train. The urban rail train comprises a current collector, a traction system and a shaft end grounding device. The traction system comprises a traction converter, a traction motor and a brake resistor; the traction converter has an ice melting mode; wherein the traction converter is controlled by the traction controller to start an ice melting mode, when the ice melting mode is started, a brake chopping bridge of the traction converter is switched on to enable a brake resistor to be started, and no current conduction exists between the brake resistor and a traction motor; and the third rail for taking electricity by the current collector, the current collector, a brake chopping bridge of the traction converter, a brake resistor, a shaft end grounding device and the rail form an ice melting loop. According to the deicing method and device, the technical problem that the early-stage capital investment is large in a traditional deicing mode of the rail train is solved.

The utility model discloses a motor collector ring copper bar group, which relates to the technical field of motor copper bar groups, and comprises a copper bar component formed by stacking a first copper bar assembly, a second copper bar assembly and a third copper bar assembly, the first copper bar assembly comprises a first L bar and a first round bar, the first round bar is fixedly connected with a first connecting plate, and the second copper bar assembly comprises a second L bar and a third L bar. The first copper bar assembly comprises a first L bar and a first round bar, one end of the first L bar is welded to the first connecting plate, the first round bar is further fixedly connected with a first connecting buckle, the second copper bar assembly comprises a second L bar and a second round bar, and the second round bar is fixedly connected with a second connecting plate. According to the utility model, the design structure is reasonable, the multi-layer superposition design is adopted, the combination of the L-shaped copper bars and the circular copper bars is combined, and the impedance in the current conduction process is reduced to the greatest extent through the reasonable geometrical shape and arrangement mode, so that the current conduction efficiency is improved, the heat generated when the current flows through is effectively dispersed, and the risk of local overheating is reduced.

The invention provides a semiconductor device and a preparation method thereof. The semiconductor device includes a substrate, a channel layer, a barrier layer, a source, and a drain. The channel layer is located on one side of the substrate; the barrier layer is located on the side, away from the substrate, of the channel layer, the barrier layer comprises a first surface deviating from the channel layer, the first surface comprises ohmic contact areas, and the ohmic contact areas comprise at least one first ohmic contact area and at least one second ohmic contact area; the surface of the same ohmic contact area comprises a first sub-surface and a second sub-surface, and the second sub-surface is located on at least one side of the first sub-surface; in the first ohmic contact area and the second ohmic contact area which are adjacent, the second sub-surface of the first ohmic contact area at least comprises a first sub-area which is located on the side, facing the second ohmic contact area, of the first sub-surface, and at least part of the first sub-area of the first ohmic contact area is sunken relative to the first sub-surface of the first ohmic contact area. The current conduction efficiency of the semiconductor device can be improved.