88results about How to "Improve overcurrent capability" patented technology

The invention relates to a high-rate total-tab type lithium battery and a preparation method thereof. The lithium battery comprises a hollow battery housing with openings in the two ends, a battery cell, an upper cover plate assembly and a lower cover plate assembly, wherein the battery cell is arranged in the battery housing, and the upper cover plate assembly and the lower cover plate assembly are arranged at the two ends of the battery housing respectively and seal the openings in the two ends respectively; the upper cover plate assembly comprises a positive pole terminal, and the lower cover plate assembly comprises a negative pole terminal. The battery cell is of a multi-layer winding structure formed by winding a separator, a positive plate, a separator, a negative plate and a separator in sequence; a positive plate electricity storage part coated with positive materials is arranged at one end of the positive plate, and a positive plate blank part is arranged at the other end; anegative plate electricity storage part coated with negative materials is arranged at one end of the negative plate, and a negative plate blank part is arranged at the other end; the positive plate blank part and the negative plate blank part are arranged at the two ends of the battery cell respectively and welded to the two ends to form a positive total tab and a negative total tab respectively.The positive total tab and the negative total tab are connected with the positive pole terminal and the negative pole terminal respectively.

The invention relates to the technical field of planar transformers, in particular to a planar transformer, electronic equipment and a production method of the planar transformer. The planar transformer comprises a first magnetic core, at least one PCB (printed circuit board) winding, at least one pancake coil and a second magnetic core. The first magnetic core, all the PCB windings, all the pancake coils and the second magnetic cores are coaxially assembled into the planar transformer. On the one hand, a primary / secondary coil formed by the PCB windings and the pancake coils has higher overcurrent capability compared with the traditional winding coil; on the other hand, when the primary / secondary coil with more turns is required to be designed, the number of the turns of the pancake coilscan be increased / decreased transversely, the assembling of multiple layers of the primary / secondary coils can be relatively avoided; a proximity effect and stray capacitance are further reduced; thepower density is increased; and a temperature rise is reduced.

The invention provides a power vehicle window controller applying an MOS tube. The MOS tube is connected in serial with an output circuit of a controller circuit; a grid G thereof is connected with a control terminal of a microprocessor; a drain D thereof is connected with normally closed contacts of two normally open relays; and a source S thereof is connected with a sampling resistor and the control terminal of the microprocessor. When the power vehicle window controller circuit is turned on or turned off, a vehicle window motor can generate a startup heavy current peak value or a back-EMF which impacts relay contacts during the actuation, causes the phenomena of burning or bonding the contacts, and leads to the failure of the operation. The power vehicle window controller utilizes a microprocessor control circuit to switch on the MOS tube after the relay contacts are actuated; and the MOS tube has a rapid switching speed and can entirely bear high-power impact generated by the motor so that the power vehicle window controller can be widely applied to various large-scale vehicles with automotive electrical appliance adopting a 24V power supply.

The invention relates to an oil-immersed water-cooled high-power electric and electronic capacitor, which consists of a shell, a capacitor core set and a cover plate. A cooling device is arranged at a gap between the capacitor core set and the shell; a cover plate assembly is provided with a cooling water inlet interface and a cooling water outlet interface which are connected with an external cooling water pipe; and two ports of the external cooling device are respectively communicated with the water inlet interface and the water outlet interface on the cover plate assembly. When the capacitor works, heat produced by the capacitor is dissipated in the form of heat radiation and heat produced inside the capacitor is brought away when external cooling water flows through the capacitor through the interface on the cover plate assembly, so internal temperature rise of the capacitor can be reduced and a temperature upper limit in the working environment of the capacitor is provided. The invention has the advantages of enhancing overcurrent capability of the capacitor, prolonging the service life of the capacitor, reducing the volume of the capacitor and lowering the manufacturing cost of the capacitor.

The invention provides a liquid injection explosion-proof pole structure of a cylindrical power battery. The liquid injection explosion-proof pole structure comprises a pole, a pole nut and a safety valve plate, wherein the pole comprises a connection plate and a pole body, the connection plate is provided with the pole body, the pole body is provided with a pole thread, the pole thread on the pole body is matched with the pole nut, a battery cover plate is arranged between the connection plate and the pole nut, the pole nut is cooperated with the pole thread to fix the pole and the battery cover plate under the effect of given pre-tightening force, a liquid injection through hole and a welding step are formed in the pole body, the welding step is arranged on the upper end of the injection liquid through hole, the welding step is connected with the safety valve plate into a whole in a welding manner, the connection plate is connected with a tab inside a battery, and the pole nut is connected with an external conducting wire. The liquid injection hole is integrated with an explosion-proof valve, so that a liquid injection function and an explosion-proof function can be realized by virtue of the form of the pole, the battery structure is simplified, the difficulty that the pole space of the power battery is small can be solved, the over-current capacity of the battery is improved, and the liquid injection efficiency is also improved.

The invention discloses a transparent display module. The transparent display module comprises a first light-pervious layer, a second light-pervious layer and a middle layer arranged between the firstlight-pervious layer and the second light-pervious layer, wherein a conductive circuit layer is further arranged between the first light-pervious layer and the second light-pervious layer, beads arearranged on the conductive circuit layer, the conductive circuit layer is a metal grid conductive circuit, and the metal grid conductive circuit is electrically connected with the beads. The inventionfurther discloses a transparent display screen. The transparent display screen is formed by combining the transparent display modules. According to the transparent display module and the transparentdisplay screen, the metal grid conductive circuit is adopted, so that sheet resistance is low, and conductivity is better; and the luminance equilibrium of the LED display screen is enhanced, the transparency of a product is improved, and large size of the LED display screen is benefited.

The invention provides a leaf spring. The leaf spring comprises two connecting plates and a plurality of elastic pieces. Each elastic piece comprises an inner contact plate, a transition plate and an outer contact plate which are connected in sequence, wherein the two ends of the transition plate are fixedly connected with the two connecting plates respectively, a space exists between every two adjacent elastic pieces, and the first circumferential face where the inner contact plates of all the elastic pieces are located and the second circumferential face where the outer contact plates of all the elastic pieces are located are coaxially arranged. The leaf spring increases the conductive contact area, and has better current passing capacity.

The invention provides a battery assembly. The battery assembly comprises at least one first battery module, at least one second battery module and a conductive element, wherein the first and second battery modules are arranged separately, each battery module comprises at least two batteries, and each battery is provided with a positive electrode and a negative electrode; and the conductive element comprises a first part connected in parallel with the two positive electrodes of the at least two batteries of the first battery module, a second part connected in parallel with the two negative electrodes of the at least two batteries of the second battery module, and a third part connected in series with the positive electrode of one battery of the first battery module and the negative electrode of one battery of the second battery module. Compared with the prior art, the battery assembly has the advantages that: series connection and / or parallel connection among a plurality of batteries can be realized by one integrated conductive element, and the connecting parts of the conductive element are flat, so that the conductive element can bear high over current. Furthermore, the number of the flat connecting parts can be multiple, so that the over current capacity of the conductive element is enhanced.

The invention provides an electrifying buffer circuit and an electrombile motor control system. The electrifying buffer circuit comprises a digital signal processor, an MOSFET drive circuit, a voltage sampling circuit and a buffer power loop. The buffer power loop comprises a power resistor and an MOSFET. The voltage sampling circuit is used for sampling the voltage across the two ends of a main contactor. The digital signal processer is used for sending drive signals to the MOSFET drive circuit to drive the MOSFET to be connected when a buffer electrifying instruction is received and the sampled voltage meets the buffer start starting conditions; when the sampled voltage meets the buffer start finishing conditions, the digital signal processer stops sending the drive signals to the MOSFET drive circuit, and after a Cgs of the MOSFET finishes discharging, signals enabling the main contactor to be closed are output. According to the electrifying buffer circuit and the electrombile motor control system, through the strong overload capacity of the MOSFET, a buffer contactor can be effectively replaced to achieve fast electrifying of capacitive load of a main loop of an electrombile power system.

The invention discloses an oil-immersed copper foil capacitor and a manufacturing technology thereof, and relates to the technical field of capacitors. The oil-immersed copper foil capacitor comprises a core, a copper material lead-out end, an insulating sheath, a sealing plate, oil and a shell, wherein the copper material lead-out end can be welded or adhered to two side polar surfaces of the core according to the area of the lead-out end; the insulating sheath sleeves between the core and the shell to form an insulating band; the sealing plate penetrates through the copper material lead-out end and the shell for sealed combination; the contact part of the copper material lead-out end is welded for sealing, and epoxy filling sealing is executed. The oil-immersed copper foil capacitor is small in size, low in loss, high in heat dissipation property, high in overcurrent and stable in voltage resistance and can bear high frequency and ultrahigh frequency.

The invention provides a discharging unit for enhancing over current capability of a protective circuit, which is composed of a compound transistor with darlington structure with an input terminal and an output terminal. The input terminal is connected with a bonding pad and the output terminal is connected with a discharging bus / power bus. The discharging unit comprises two compound transistors of darlington structure with an NPN / PNP bipolar type and two resistances; well isolation can be adopted to manufacture the two resistances in the discharging unit so as to increase the resistance value of the two resistances in the discharging unit when the discharging unit of the two NPN type transistors are manufactured; meanwhile the emitter of NPN bipolar type transistors and the area of the collector can be enhanced to increase the amplification efficiency of the discharging unit; well isolation and shallow-trench isolation to the collector of the two PNP tube can be adopted for manufacturing the discharging unit of the two PNP transistors. By adopting the discharging unit of compound tube with the darlington structure and the skillful manufacturing method thereof, the over current capability and discharging efficiency of the protective circuit are enhanced.

The invention relates to the technical field of electromagnetic heating devices, in particular to an electromagnetic heating controller. The electromagnetic is characterized in that a circuit board is provided with a three-phase supply input terminal, a three-phase rectifying module, a filter capacitor, a filter inductor, an IGBT (insulated gate bipolar transistor) module, a resonant capacitor, a power output terminal, an IGBT driving circuit, a power transformer, a control circuit, a radiator, an input mutual inductor and an output mutual inductor; the three-phase supply input terminal, the three-phase rectifying module, the filter capacitor, the IGBT module, the resonant capacitor and the power output terminal are sequentially bridged and connected through red copper bars; the filter inductor is respectively bridged and connected with the three-phase rectifying module and the filter capacitor through red copper bars; and the IGBT module is bridged and connected with the power output terminal through a red copper bar. By adopting the red copper bar bridging scheme, the temperature is low; the temperature resistance is high, and the production process is simple; and the thickness and width of the copper bars for connecting the circuit have no limit, so the over current capability is strong, and the copper bars can be used for the electromagnetic heating controller with power of 8-30 KW, especially for the electromagnetic heating controller with power more than 30KW.

A high-power lithium ion battery for an automobile start-stop power supply comprises a positive plate and a negative plate, the tab width accounts for more than 50% of the width of the battery; the positive electrode current collector is a conductive coating aluminum foil with the total thickness of 24 microns, the conductive coating is coated on the positive electrode current collector before thepositive electrode active substance is coated, and the total thickness of the conductive coating is 0.5-2 microns; the positive electrode active substance is lithium iron phosphate; the positive electrode conductive agent is a mixture of carbon nanotubes, graphene and carbon black; and the electrolyte contains a lithium salt, an organic solvent and an additive. According to the invention, the overcurrent capacity of the battery can be improved, the power performance is enhanced, the problem of low conductivity of the lithium iron phosphate anode is solved, and the electrode conductivity is improved; particularly, the low-temperature rate discharge capacity is improved by more than 30%; the falling of lithium iron phosphate from the aluminum foil can be slowed down, and the cycle life is prolonged by about 8%; the electrolyte is not easy to vaporize at a high temperature, still has low viscosity at a low temperature of -30 DEG C, and maintains high ionic fluidity.

This invention discloses a pin structure component of a module supply including a punch pin, a surface pasted pin and high temperature insulation piece characterizing that the insulation piece locates the pins according to the pin position definition of module supply industrial standard to get the component, which has the advantages of punch pins and total surface pasted pins, and the punch one used for the supply input and output is good in flowing current and a fixed mechanical connection strength, and the surface pasted pin used for assistant function pins occupies less resource of PCB and two of which are combined to one unit after plastic package to strengthen the mechanical strength.

The invention discloses a cylindrical battery and an energy storage device, and relates to the technical field of energy storage. The cylindrical battery comprises a battery shell and a roll core arranged in the battery shell, the battery shell comprises a cover plate assembly and a bottom plate which are oppositely arranged, at least one end of the roll core is provided with a net-shaped current collector, the bottom plate and / or the cover plate assembly are / is provided with a plurality of protrusions corresponding to the current collector, and the protrusions are arranged on the bottom plate and / or the cover plate assembly. And the roll core is connected with the bulge through the current collector. The over-current capability at the confluence can be improved, so that the monomer capacity is improved, and the method is better suitable for a high-magnification application scene.

The invention relates to an SOI substrate-based antifuse unit structure and a preparation process thereof. The SOI substrate-based antifuse unit structure comprises a bulk silicon substrate and a buried layer of silicon dioxide positioned on the bulk silicon substrate, wherein the buried layer of the silicon dioxide is at least provided with an MOSFET well region and at least one lower polar plate of the antifuse; the MOSFET well region is separated from the lower polar plate of the antifuse through a silicon dioxide spacer layer; a first silicon dioxide layer, a first silicon nitride layer and a second silicon dioxide layer are grown on both of the MOSFET well region and the lower polar plate of the antifuse; the first silicon dioxide layer, the first silicon nitride layer and the secondsilicon dioxide layer respectively serve as a gate medium of the MOSFET and a high-resistance medium of the antifuse; a polycrystalline silicon layer and a silicide layer are distributed on the second silicon dioxide layer orderly; the corresponding polycrystalline silicon layer and the silicide layer on the MOSFET well region serve as the grid of the MOSEFET; the corresponding polycrystalline silicon layer and the silicide layer in a lower polar plate region of the antifuse serve as an upper polar plate of the antifuse; and the MOSFET well region is provided with a source and a drain of the MOSFET. The SOI substrate-based antifuse unit structure has the characteristics of simple process, good compatibility and good radiation resistance performance.

The invention relates to the field of high-voltage pulse application, in particular to a dry film capacitor applied in the field of pulse dedusting, which can meet the application conditions of high voltage, high current and high charge-discharge frequency. The dry film capacitor comprises a case, wherein the case is provided with potting compounds a left core unit and a right core unit, an insulating board is arranged between the left core unit and the right core unit, both the left core unit and the right core unit are connected to the electrode by welding copper plate, both the left core unit and the right core unit comprise two groups of welding-connected single-core units welded respectively, the single-core unit is at least comprised of four capacitor cores in series, the capacitor core comprises at least ten metallized films, the left core unit and the right core unit are connected in series, the metallized films on the capacitor core are plated with aluminum film, and two end edges of the aluminum film are thickened layer.

The present invention provides a cylindrical battery negative electrode end cover and a cylindrical battery thereof. The cylindrical battery negative electrode end cover comprises a top cover sheet, ariveting block located above the top cover sheet and isolated from the top cover sheet, and a negative electrode column fixedly connected with the riveting block, wherein the top cover sheet is provided with a first negative electrode installation hole and a second negative electrode installation hole; the negative electrode columns comprise a first negative electrode column and a second negativeelectrode column which are respectively installed in the first negative electrode installation hole and the second negative electrode installation hole in an insulating manner, and the top cover sheet is provided with an overturning sheet located between the first negative electrode column and the second negative electrode column. When the internal air pressure of the battery exceeds a preset value, the overturning sheet is driven by air pressure to overturn towards the riveting block and is in contact with the riveting block so as to be electrically connected with the top cover sheet and thenegative pole. Due to the arrangement of the multi-negative-pole structure, the overcurrent capacity can be improved, the anti-rotation effect can be achieved, the riveting block can serve as an external output component and can also be combined with the overturning piece to form a safety device, the structure is good in compactness, the extra height size is not increased, the volume energy density is high, and the requirements of an existing high-energy-density battery can be met.

The invention discloses a packaging method of an intelligent power module and the intelligent power module. The method comprises the steps: carrying out the conductive paste printing on the outer surface of a first resin layer after the intelligent power module completes first resin layer packaging, wherein a power chip in the intelligent power module is arranged in the first resin layer; and carrying out second resin layer packaging on the intelligent power module printed by the conductive paste to obtain a packaged and formed intelligent power module, wherein a driving chip of the intelligent power module is placed in the second resin layer. The technical problems that a traditional intelligent power module is electrically connected in a lead bonding mode, so that stray inductance is high, and the current bearing capacity is insufficient are solved.

The invention provides a high-linearity attenuator. The high-linearity attenuator comprises a coarse adjustment attenuation module, a fine adjustment attenuation module, a high-voltage protection module and a low-voltage protection module, the coarse adjustment attenuation module performs coarse adjustment of attenuation on the input differential signal and comprises at least one stage of coarse adjustment attenuation unit, and the coarse adjustment attenuation units are sequentially cascaded and have equal equivalent load impedance; the fine adjustment attenuation module performs attenuationfine adjustment on the signal output by the coarse adjustment attenuation module; the high-voltage protection module and the low-voltage protection module are connected to the input end and the outputend respectively; the coarse adjustment attenuation module and the fine adjustment attenuation module comprise high-linearity switches and resistors, attenuation adjustment is achieved based on on-off of the switches, and the working states of the switches comprise a high-voltage-withstanding partition state and an on-state of a low-on-resistance; and the resistor in the coarse adjustment attenuation module is a metal resistor. The high-linearity attenuator has the advantages of being high in precision, easy to expand the attenuation range, high in linearity, large in bandwidth, high in powerendurance capacity and the like.

The invention relates to electronic equipment, an electric connector and a manufacturing method thereof, the electric connector comprises an insulating seat, a first terminal strip, a second terminal strip and a conducting strip, the insulating seat is provided with a first surface and a second surface which are opposite to each other, the first terminal strip is connected with the insulating seat and is exposed on the first surface, the first terminal strip comprises at least two first power supply terminals, and the second terminal strip comprises at least two second power supply terminals. And the second terminal strip is connected with the insulating seat and exposed on the second surface, the second terminal strip comprises second power supply terminals in one-to-one correspondence with the first power supply terminals, the conducting strip is connected with the insulating seat, and the conducting strip is electrically connected with the first power supply terminals and the second power supply terminals. According to the electronic equipment, the electric connector and the manufacturing method of the electric connector, the first power supply terminal and the second power supply terminal which are correspondingly arranged in the first terminal row and the second terminal row of the electric connector are electrically connected through the conducting strip, so that the cross sectional area of electrification is improved through the conducting strip, the overall impedance is reduced, the overcurrent capacity of the electric connector is improved, and the service life of the electric connector is prolonged. The charging efficiency is improved.

The invention discloses a method for implementing increase of current capacity by a common circuit board in the technical field of battery management. The method comprises the following steps of: S1,selecting a specification copper foil, and windowing on the surface of the copper foil to form a dense net shape; S2, uniformly coating solder paste on each node of the net-shaped copper foil, and carrying out inclined connection to form an inclined solder paste network; S3, carrying out furnace passing processing on the copper foil coated with the solder paste, so that after being molten, the solder paste is shrunk and automatically absorbed on the windowed net-shaped copper foil; and S4, carrying out processing repair on the copper foil subjected to furnace passing processing so as to form solder webbing with a uniform thickness. According to the invention, when the solder paste passes through a furnace, the solder paste is automatically shrunk after being molten and can be absorbed ontothe windowed net-shaped copper foil to form the solder webbing with the uniform thickness, soldering tin is not cut off after being solidified and the soldering tin is large in thickness, so that overcurrent capacity of the copper foil is increased by multiple times; and moreover, according to the method, production steps are not increased, generated benefits are huge, and the defect of excessively low overcurrent capacity of a common copper foil is overcome.

The invention discloses an Ethernet power supply circuit applied to network monitoring equipment. The Ethernet power supply circuit comprises a proportional plus derivative (PD) controller, a DC (direct current)-DC controller, a power switch field effect transistor (FET) tube, a transformer, a rectifying circuit and a voltage detection circuit; an inner metal-oxide semiconductor field effect transistor (MOSFET) tube is arranged in the PD controller; the DC-DC controller, the power switch FET tube and the transformer are sequentially connected to form a DC-DC converter; the rectifying circuit is in feedback connection with the DC-DC controller through the voltage detection circuit; an outer MOSFET tube is connected in parallel with the inner MOSFET tube in the PD controller, and is connected with a level switching circuit; and the PD controller is connected to the level switching circuit. The current through capacity between control input ground (GND) and the ground (GND) of the level switching circuit is improved, and power for the PD controller is saved by 80 percent, so that the PD controller cannot be damaged due to overheat, and the maximum power which can be output by the circuit is improved further.

The invention discloses a novel socket replaceable terminal connecting structure, which comprises a socket main body, an inner inserting core and replaceable terminals, wherein the inner inserting core is arranged inside the socket main body, and the replaceable terminals are installed on the socket main body and the inner inserting core; each replaceable terminal includes a terminal shell installed on the socket main body and the inner inserting core, a terminal reed arranged in the terminal shell and a protective cover installed on the socket main body and at the top of the terminal shell. The invention provides a novel socket replaceable terminal connecting structure, which not only is convenient to assemble and disassemble, capable of effectively realizing fast replacement of terminalreeds in the socket and simple and convenient to operate, but also is simple in structure, stable and reliable, and can effectively reduce the cost and improve the overcurrent capacity and overall performance of the socket.

The invention discloses a jack electric contact assembly and an electric connector. The jack electric contact assembly comprises a sleeve and an elastic contact piece, wherein the elastic contact piece comprises elastic piece parts forming a cage shape and connecting rings connected to two ends of the elastic piece parts, and the elastic piece parts and the connecting rings are inserted into the sleeve; each elastic sheet part is provided with a plurality of abutting parts used for abutting against pin terminals inserted into the elastic sheet part in the axial direction, connecting parts usedfor connecting every two adjacent abutting parts, and positioning parts abutting against the sleeve are convexly arranged on the outer walls of the connecting parts. According to the jack electric contact assembly, the current passing capability of a single electric connector can be improved, meanwhile, the elastic contact piece is positioned and installed in the sleeve, and the connection between the sleeve and the elastic contact piece is optimized.

The invention is suitable for the display technology field and provides a driving circuit, a driving method and a display device. Two identical driving data under a specific gray level are outputted through a control module, one driving data is processed into two identical driving voltages by a source driving module, the two identical driving voltages are then outputted, the other driving data isprocessed into an analog voltage by a digital-to-analog conversion module, magnitudes of one driving voltage and the analog voltage are determined through a voltage comparison control module, when theone driving voltage is less than the analog voltage, the source driving module is controlled for improving a voltage value of the driving voltage, and thereby the driving voltage and overcurrent capability when a data line led out by the source driving module becomes a weak line can be improved, the pass rate of display panels can be effectively improved, and production cost is reduced.

The present invention provides a high-frequency switching power supply transformer. The high-frequency switching power supply transformer is provided with a left protective sleeve and a right protective sleeve which are electrically and thermally conductive. An annular iron core winding a primary side coil is disposed in an inner circular cavity which is filled with silica gel and which is formed by the two protective sleeves. Two insulated high-frequency electromagnetic twisted wires formed by twisting multiple enameled wires are disposed inside a middle hole of the iron core. An upper end and a lower end of each of the two twisted wires are fixed on upper and lower copper bars of the two coils respectively, by welding or pressing. Moreover, a left upper copper bar and a tapping copper bar are fixed on top surfaces of the left and right protective sleeves respectively, and two lower copper bars are fixed on bottom surfaces of the two protective sleeves respectively to form a secondary side. The enameled wires effectively eliminate heat caused by a skin effect or an eddy current effect, and improve an over-current capability and reliability; and power is increased and the volume is reduced. The highly thermally conductive silica gel absorbs heat and rapidly transfers the heat to the protective sleeves internally cooled by water, thereby greatly improving heat dissipation. According to the high-frequency switching power supply transformer, problems of heat and great loss of a transformer discloses by Projects from National Natural Foundation Fund are solved; efficiency can be easily improved; and matching can be optimized. The high-frequency switching power supply transformer is used for low-voltage large-current half-wave, full-wave and single-phase rectification in electrolysis, electric heating, electric vehicles and the like.

The invention discloses a production method of a resistor, and relates to the technical field of electrical equipment manufacturing. The production method comprises the following steps of sleeving insulating sleeves on the outer sides of two support rods respectively, inserting a first resistor disc at one end of each insulating sleeve, sleeving metallic beads on the outer sides of the insulating sleeves, allowing a contact surface at one end of each metallic bead to push against one side contact surface a contact surface at one sideof each resistor disc, inserting a second resistor disc on the insulating sleeves at the other end of each metallic bead, allowing the first resistor discs first resistor disc to be connected in parallel with the second resistor discs second resistor disc by the metallic beads, allowing third resistor discs third resistor disc to be connected in parallel with fourth resistor discs fourth resistor disc by the metallic beads, allowing the first and second resistor discs to be connected in series with the third and fourth resistor discs, and repeat in this way until the resistor is produced. The production method can solve the problem of short-circuit trip caused by frequent burnout of the contact surfaces of the operation maintaining resistors and grounding arising from burnout and breakdown of the insulating sleeves of motor rotors.

The invention belongs to the capacitor technology field, and especially relates to a coupling capacitor. The technical problems are solved that present technical design is not reasonable and stability is poor. The coupling capacitor comprises a cylindrical metal housing. A winding core is arranged in the metal housing. A first electrode with an end part extending out from the winding core is arranged at one end of the winding core, and a second electrode with an end part extending out from the winding core is arranged at the other end of the winding core. The coupling capacitor is characterized in that an adhesive tape layer coating the winding core is arranged on the winding core. Filling packaging layers are arranged between one end of the metal housing and the winding core and between the other end and the winding core respectively. Compared with the prior art, the coupling capacitor is advantageous in that practicality is strong, the coupling capacitor is stable and reliable, the high-frequency loss is small, the over-current capability is strong, the temperature drift is small, and the temperature of the whole capacitor is low.

The invention provides a cable connector structure which comprises a male connector and a female connector, wherein the male connector comprises a male conductive contact pin electrically connected with a cable core wire, a male rubber coating fixedly connected with a cable insulating layer, a male plug plastic connected with the male conductive contact pin, a connecting male seat connected with the male plug plastic, and a male lock catch connected with the connecting male seat; the female connector comprises a female conductive contact pin electrically connected with the cable core wire, a female base plastic connected with the female conductive contact pin, and a female connector connected with the female base plastic; and the male connector and the female connector are connected and matched through a male connector lock catch. The cable connector structure is convenient to connect, high in connection strength, capable of effectively avoiding poor contact at the position of the connector and excellent in overcurrent capacity.