1809 results about "Electrolytic capacitor" patented technology

The invention discloses a direct current charging pile module without an electrolytic capacitor and an output ripple control method thereof, the direct current charging pile module only adopts a non-electrolytic capacitor, and the output ripple control method comprises a frequency conversion control strategy and an output ripple control strategy. Adjusting the switching period of a switching tube in the post-stage DC / DC converter according to the frequency conversion control strategy; according to the output ripple control strategy, a switching period compensation result is obtained through calculation according to the output ripple change trend, and the switching period of a switching tube in a post-stage DC / DC converter is further adjusted on the basis of frequency conversion control so as to suppress the output ripple. Compared with the prior art, the direct-current charging pile module only adopts the non-electrolytic capacitor, so that the service life and the reliability of the whole direct-current charging pile module are improved; the output of a post-stage DC / DC converter is stabilized near an expected value through a frequency conversion control strategy, and an additional output ripple control strategy is used for solving the problem that the output ripple is relatively large under the condition of no electrolytic capacitor.

The invention discloses an optimal control method for a single-phase high-frequency chain AC-DC non-electrolytic capacitor converter, and belongs to the technical field of power electronics. In order to realize power factor correction and soft switching without a closed-loop control circuit, the circuit comprises a converter and a controller, and the converter and the controller are connected through a signal; the controller collects a signal of the converter as a feedback signal, and generates a driving pulse signal of the converter in an SPWM mode. A phase shift control method and a dead zone self-adaptive control method are adopted to control a first series switch tube, a second series switch tube, a third series switch tube and a fourth series switch tube in a primary side matrix converter and a secondary side first switch tube and a secondary side second switch tube of a secondary side rectifier; and the frequency and the pulse width of the secondary-side third switch tube and the secondary-side fourth switch tube are optimally controlled. The driving pulse signal of the pre-stage matrix converter is generated, a direct-current link energy storage capacitor of a traditional two-stage rectifying circuit is eliminated, the size is reduced, and the hardware cost is saved.

The invention belongs to the technical field of power electronics, and relates to an energy feedback high-power-factor air conditioner compressor driving system. Comprising a direct-current bus, a direct-current bus electrolytic capacitor, a motor driving circuit, a shutdown energy feedback circuit, a permanent magnet synchronous motor and a motor control module, wherein the two ends of the direct-current bus electrolytic capacitor are connected with the positive electrode and the negative electrode of the direct-current bus respectively; in the energy feedback control module for driving the combined switch device in the shutdown energy feedback circuit, the motor driving circuit and the shutdown energy feedback circuit, the second connecting end I of each phase of bridge arm is connected with the positive electrode of the direct-current bus, and the second connecting end II of each phase of bridge arm is connected with the negative electrode of the direct-current bus; the first connecting end of the phase bridge arm of the shutdown energy feedback circuit is connected with the phase power grid voltage through the phase filter inductor. The method can maintain the stability of the DC bus voltage, and reduces the influence of the power grid voltage fluctuation and the air conditioner compressor load fluctuation.

To provide an electrolytic solution for an electrolytic capacitor that is capable of maintaining high performance over a long period of time even in severe environments, and an electrolytic capacitor using this electrolytic solution.SOLUTION: There is provided an electrolytic solution for an electrolytic capacitor, the electrolytic capacitor including: a capacitor element having an anode foil that has a dielectric oxide film layer on a surface thereof, a cathode foil, and a solid electrolyte layer; and an electrolytic solution impregnated into the capacitor element. The electrolytic solution comprises an organic solvent containing the following compound (a) and / or (b): (a) an aromatic carboxylic acid having a sulfo group and a hydroxy group, and a boron compound; and (b) a composite compound of an aromatic carboxylic acid having a sulfo group and a hydroxy group, and a boron compound.SELECTED DRAWING: None

An apparatus is disclosed which includes an electrolytic capacitive element with multiple capacitor sections.

The utility model discloses a power cabinet and a heat radiation system thereof, the power cabinet comprises a closed power cabinet main body and a heat radiation cabinet body capable of interacting with external air, and a power module, an evaporator of a thermosyphon heat radiator, an electrolytic capacitor, a switch device and an internal fan are accommodated in the power cabinet main body; a power inductor, a condenser of a thermosyphon radiator and an external circulating fan are contained in the heat dissipation cabinet body, the power cabinet adopts a thermosyphon heat exchange technology, heat of a power module in the cabinet is transferred to the heat dissipation cabinet body, meanwhile, the power inductor is externally arranged in the heat dissipation cabinet body, an internal heat exchange device and an external heat exchange device of the power inductor are omitted, and the heat dissipation efficiency is improved. The heating value in the power cabinet main body is effectively reduced, the heat exchange cost in the power cabinet main body is saved, and the IP65 protection level of the power cabinet main body can be met.

A method for producing a conductive polymer dispersion, the method comprising a step for adding an electric conductivity improving agent to a dispersion that contains a conjugated conductive polymer and a polyanion and dispersing the same, wherein the step is performed at a liquid temperature of 30°C or higher.

The utility model relates to an electrolytic capacitor energy storage type relay driving circuit for an electricity meter and terminal equipment. The electrolytic capacitor energy storage type relay driving circuit comprises a processing unit, an electrolytic capacitor energy storage unit, a driving unit and an electric pull-in relay, the input end of the electrolytic capacitor energy storage unit is used for being connected with a power supply end; a first input end of the driving unit is connected with the electrolytic capacitor energy storage unit or the power supply end, and a second input end and a third input end of the driving unit are in communication connection with the processing unit; the first input end of the electric pull-on relay is connected with the first output end of the driving unit to indirectly conduct the first input end, the second input end and the third input end of the driving unit; the second input end of the electric pull-on relay is connected with the second output end of the driving unit to indirectly conduct the first input end, the second input end and the third input end of the driving unit, and the output end of the electric pull-on relay is used for being connected with a load circuit. The utility model solves the problems of high energy consumption and low response speed.

The invention relates to the technical field of power electronic components, and discloses a high-temperature-resistant electrolytic capacitor which comprises the following components in parts by weight: 80-90 parts of a graphene or carbon nanotube coating used for preparing an electrolytic capacitor shell; the invention further provides a preparation method of the high-temperature-resistant electrolytic capacitor, and the preparation method comprises the following steps: heat conduction optimization design: simulating a temperature field of the electrolytic capacitor through an unsteady-state heat conduction equation, optimizing a heat dissipation path of the electrolytic capacitor, and improving the heat dissipation performance of the electrolytic capacitor; and heat can be uniformly conducted to an external heat dissipation device. By introducing the microencapsulated phase change material, the graphene coating and the accurate temperature sensor array and optimizing heat dissipation design, efficient heat dissipation, temperature balance and long-term stability of the electrolytic capacitor in a high-temperature environment are achieved, the working performance of the electrolytic capacitor is remarkably improved, and the service life of the electrolytic capacitor is remarkably prolonged.

The invention relates to the technical field of aluminum foil winding, and specifically to an aluminum foil winding device for electrolytic capacitors and a method thereof, comprising a winding base, a winding driver is fixedly installed on one end of the upper surface of the winding base, a main winding roller is rotatably installed on one end of the winding driver, a supporting shaft frame matching the main winding roller is rotatably connected to one end of the upper surface of the winding base, a top cover is fixedly connected to one end of the winding driver, a film-driving assembly is rotatably installed between the winding driver and the mounting frame, and the film-driving assembly comprises a rotating drum rotatably installed between the winding driver and the mounting frame, and a plurality of distribution films obliquely and symmetrically connected to the outer surface of the rotating drum, which is beneficial to multiple compaction of the winding material when the aluminum foil is wound, improves the compactness, cooperates with impurity cleaning, prevents bubbles and wrinkles from appearing during winding, and improves the overall forming quality of the winding.

An electrolytic capacitor includes a winding portion, an anode lead member, and a cathode lead member. The winding portion includes an anode foil and a cathode foil that are wound. The anode lead member is connected to the anode foil and extends in a first direction. The cathode lead member is connected to the cathode foil and extends in the first direction. The winding portion has a shape viewed in the first direction, the shape including a first peripheral region and a second peripheral region that are opposed to each other in a second direction intersecting the first direction, and a third peripheral region and a fourth peripheral region that are opposed to each other in a third direction intersecting the first direction and the second direction. The length of the winding portion in the third direction is larger than the length of the winding portion in the second direction. The anode lead member and the cathode lead member are arranged point-symmetrically with respect to a center of the winding portion when viewed in the first direction.

The invention relates to a charger, a charger control method and a vehicle. The charger comprises a magnetic integrated transformer, an AC-side single-stage conversion circuit, a high-voltage-side conversion circuit and a low-voltage-side conversion circuit. The first end of the alternating-current side single-stage conversion circuit is connected with an alternating-current side, and the second end is connected with a primary winding of the magnetic integrated transformer; the first end of the high-voltage side conversion circuit is connected with a high-voltage secondary winding of the magnetic integrated transformer, and the second end is connected with a power battery; the first end of the low-voltage side conversion circuit is connected with the low-voltage secondary winding of the magnetic integrated transformer, and the second end is connected with a low-voltage system. A power factor correction function can be realized through the alternating current side single-stage conversion circuit, a power factor correction circuit and a bus electrolytic capacitor can be omitted at the same time, and the service life of the charger is prolonged. In addition, the high-voltage side conversion circuit and the low-voltage side conversion circuit share one magnetic integrated transformer, so that the size of the charger is reduced, the consumption of power switch devices is reduced, and the cost and the highest power density are reduced to the maximum extent.

The invention discloses an electrolytic capacitor pin defect visual inspection device, and relates to the technical field of visual inspection devices. Through cooperation of the first electric telescopic rod, the material guide plate and the triangular plate, the conveying angle and position of the capacitor can be adjusted conveniently, and the flexibility of capacitor conveying path adjustment is improved; the analysis module carries out continuity judgment and length comparison on the gray blocks, the length edge of the capacitor in the image can be accurately recognized, even if part of stains exist or the gray blocks are not continuous due to uneven illumination, the complete length edge can be obtained through extension processing, edge recognition errors caused by local defects of the image are effectively avoided, and the image quality is improved. The position judgment precision of the capacitor is improved; by dynamically calculating the deviation angle and correspondingly adjusting the exposure time and gain, the detection device can automatically adapt to different skew states of the capacitor, manual intervention is not needed, and the automation degree of detection and the universality of the device are improved.

Provided is an electrolytic capacitor including a capacitor element and a liquid component. The capacitor element includes an anode foil having a dielectric layer on a surface of the anode foil, and a conductive polymer component in contact with at least a portion of the dielectric layer. The conductive polymer component contains a self-doped conductive polymer. The liquid component contains at least one solvent selected from the group consisting of alkylene glycols having 4 or more carbon atoms and polyalkylene glycols having a repeating structure of oxyalkylene having 3 or more carbon atoms.

The invention relates to a method (10) for assessing a remaining lifetime of an LED gear (20). The method (10) comprises the steps of: supplying (11) a constant current load from an electrolytic capacitor (21) of the LED gear (20); measuring (12) an electrical characteristic of the electrolytic capacitor (21) over time when the constant current load is supplied by the electrolytic capacitor (21); calculating (13) a capacitance of the electrolytic capacitor (21) based on the measured electrical characteristic; and determining (15) a remaining lifetime estimate and / or a reaching of an end of lifetime of the LED gear (20) based on the calculated capacitance.

The invention discloses an electrolytic capacitor testing method and system, and particularly relates to the technical field of electrolytic capacitor testing, and the method comprises the steps: obtaining a time-frequency domain coupling waveform of electrolytic capacitor testing, and constructing an anti-interference reference feature library covering a process fluctuation interval based on a correlation function of an electrolyte dynamic impedance spectrum and an ultrasonic speed; based on a physical equation of electrolyte evaporation and polar plate corrosion, a topological structure updating rule of a graph neural network and a physically constrained graph topological structure are dynamically generated; the method comprises the following steps: extracting defect sensitive frequency band characteristics of a cross-modal signal through a differentiable frequency band selection network, extracting multi-scale fusion characteristics from a time-frequency domain coupling waveform based on the defect sensitive frequency band characteristics, inputting the multi-scale fusion characteristics into an edge keeping regularization layer, and adaptively adjusting reconstruction parameters according to the confidence coefficient of a defect gradient field so as to obtain an edge keeping regularization layer; and a three-dimensional defect form meeting the continuity constraint is generated, so that the problem of low detection precision of the internal defect of the electrolytic capacitor is solved.

The invention provides a grid-side current harmonic suppression method and device for a motor driving system without an electrolytic capacitor. The method comprises the following steps: determining first and second bus voltage harmonics based on bus voltage obtained by sampling and inverter switching frequency; correcting the bus voltage according to the first bus voltage harmonic wave and the second bus voltage harmonic wave so as to determine a reconstructed bus voltage; according to the second bus voltage harmonic, the reconstructed bus voltage, an inverter output three-phase duty ratio and a motor three-phase current, first and second network side current harmonic regulation and control voltages are determined based on a self-defined closed-loop controller; and adopting a motor alpha-axis correction voltage and a motor beta-axis correction voltage determined according to the first and second grid-side current harmonic regulation and control voltages to participate in motor SVPWM modulation to output the three-phase duty ratio of an inverter so as to suppress grid-side input current harmonics. According to the method and the device, factors such as motor operation conditions, bus voltage harmonic waves and digital control delay are comprehensively considered, the quality of grid-side input electric energy is improved, and disturbance to machine-side rotating speed and torque is reduced.

The invention provides a driving control method for a permanent magnet synchronous motor without an electrolytic capacitor, and the method comprises the steps: carrying out the harmonic extraction of a collected DC bus voltage value of a driving system of the permanent magnet synchronous motor without the electrolytic capacitor through a band-pass filter, and obtaining harmonic waves of different frequencies; carrying out weighted summation on the harmonic waves with different frequencies to obtain a correction coefficient; then correcting the reference voltage output by the controller of the permanent magnet synchronous motor without the electrolytic capacitor by using the correction coefficient to obtain a control voltage; and finally, modulating the control voltage by using an inverter in the non-electrolytic capacitor permanent magnet synchronous motor driving system, and generating a driving control signal to carry out driving control on the non-electrolytic capacitor permanent magnet synchronous motor. The input current quality can be effectively improved, and the system stability is improved.

A solid electrolytic capacitor that includes: an anode plate including a core portion, a porous layer having pores on at least one main surface of the core portion, and a dielectric layer on a surface of the porous layer and extending into the pores of the porous layer; and a cathode layer that includes a solid electrolyte layer on a surface of the dielectric layer. The solid electrolyte layer includes a conductive polymer layer inside the pores of the porous layer, the conductive polymer layer comprising a mixture of a conductive polymer and an insulating material. The insulating material is a material which contains an OH group, a COOH group, a CO group, or an NH2 group in a molecule, has hygroscopicity, and does not have a function as a dopant for the above-described conductive polymer.

Provided is a conductive polymer solution capable of providing an electrolytic capacitor having high capacity and exhibiting low ESR characteristics. A conductive polymer solution having a pH of 1.5-5.0 is used, the solution containing 0.01-10% by mass of a polythiophene (A) containing at least one type of structural unit selected from the group consisting of structural units represented by general formula (1) and structural units represented by general formula (2), 0.001-20% by mass of an epoxy compound (B) having at least two or more epoxy groups, and water. In general formulae (1) and (2), R2 represents a hydrogen atom, a methyl group, an ethyl group, a C3-6 linear or branched alkyl group, or a fluorine atom, m represents an integer of 1-10, and n represents 0 or 1. ] # imgabs0 #

The invention discloses a non-electrolytic capacitor permanent magnet synchronous motor torque ripple suppression method and device based on current harmonic injection, and belongs to the field of permanent magnet synchronous motor control, and the method comprises the steps: enabling the power of an inverter to be equal to the ideal network side input power as a target, carrying out the harmonic injection of a q-axis current given reference value Iq0, and obtaining a reference value Iq0; and performing harmonic injection on a d-axis current given reference value Id0 to obtain a d-axis current reference value # imgabs1 #, performing PI control on differences between the d-axis current reference value and the q-axis feedback current and between the d-axis current reference value and the q-axis current reference value and between the d-axis current reference value and the q-axis feedback current after PI control is performed on the d-axis current reference value and the q-axis current reference value, adding the d-axis current reference value and the q-axis current reference value to d-axis feed-forward structure voltage and q-axis feed-forward structure voltage of the motor to obtain a d-axis current reference value # imgabs0 # and a q-axis current reference value # imgabs1 #. And 4, obtaining d and q axis voltage reference values # imgabs2 #, converting # imgabs3 # into alpha and beta axis voltage reference values, and generating PWM (Pulse Width Modulation) signals for controlling each switching tube in the inverter. According to the invention, on the premise of not increasing extra hardware cost, the torque ripple of the output torque is effectively reduced, and meanwhile, a high input power factor is realized.

To provide a solid electrolytic capacitor excellent in productivity, and a method for manufacturing the solid electrolytic capacitor, with which an area ratio of a capacitor element portion in an anode foil and a mechanical strength of the anode foil can be improved.SOLUTION: A solid electrolytic capacitor 100 includes: a laminate 11 in which a plurality of solid electrolytic capacitor elements 10 are laminated; a sealing body 110 sealing the laminate; and an anode terminal electrode 120 and a cathode terminal electrode 130 provided on the same surface of the sealing body. Each of the solid electrolytic capacitor elements includes an anode foil 40 and a cathode portion 43 provided in a central part 40C of the anode foil so as not to cover one end 40A and an other end 40B of the anode foil. The one ends 40A of the anode foils of the solid electrolytic capacitor elements are electrically connected to each other and connected to the anode terminal electrode, while the other ends 40B are sealed with the sealing body. A plurality of the cathode portions of the solid electrolytic capacitor elements are electrically connected to each other, and are electrically connected to the cathode terminal electrode.SELECTED DRAWING: Figure 2

The invention discloses a sealing structure for an electrolytic capacitor, and relates to the technical field of electrolytic capacitors, the sealing structure comprises a capacitor fixing mechanism and a lifting support rod installed at the bottom of the capacitor fixing mechanism, the top of the capacitor fixing mechanism is provided with a sealing mechanism, and the bottom of the sealing mechanism is provided with a moving disc. The capacitor fixing mechanism comprises a workbench, a fixing ring is fixedly installed on the top of the workbench, a first rotating motor is installed on one side of the interior of the fixing ring, the output end of the first rotating motor is fixedly connected with a rotating main bevel gear, and the top of the rotating main bevel gear is connected with a meshing gear ring in a meshing mode. An adjusting knob is rotated to drive an inclined threaded rod to rotate, so that an inclined threaded sleeve drives a second support and an inclined rotating rod to rotate, the inclination angle of an inclined guide plate can be adjusted, and when the electrolytic capacitor is sealed, a capacitor end cover can be secondarily extruded and fixed through a clamping sliding rod.

The invention discloses a filter press for producing electrolyte of a liquid electrolytic capacitor, which comprises a base, and a box body is fixedly mounted at the top of one side of the base. After solid-containing wastewater is subjected to filter pressing, solids are discharged through the opening of the filter cartridge, the moisture content of the discharged solids is detected through the moisture content tester, the controller controls the electric telescopic rod to push the cone to move according to the moisture content of the discharged solid waste, and the size of the opening of the filter cartridge is adjusted through the cone. The extrusion force on solid containing water in the filter cartridge is increased, the moisture content of the discharged solid is reduced, the solid enters the drying box after being discharged, meanwhile, the rotating shaft drives the crushing rollers on the two sides through the transmission mechanism to crush solid waste, powder is dried through the drying mechanism, and then the moisture content of the solid waste can be further reduced; compared with an existing filter press, the filter press for electrolyte production has the advantages that the water content in solid waste after filter pressing can be effectively reduced, and the solid-liquid separation effect is improved.

The invention discloses a topological structure of a single-phase isolation type integrated vehicle-mounted charging system without an electrolytic capacitor and a control method of the topological structure, the system multiplexes a driving motor stator winding on the basis of an open winding driving system of an electric vehicle, and when the system is switched from a driving operation mode to a charging operation mode, the driving motor stator winding is switched to the charging operation mode. An open winding permanent magnet motor driving system is reconstructed into an isolated AC / DC converter without an electrolytic capacitor through a change-over switch, the isolated AC / DC converter comprises a synchronous rectifier, a dual-active-bridge converter and an active filtering device, phase shifting is controlled through matching of transmission power and network side input power, power factor correction is achieved, and power factor correction is achieved through winding inductive current control. According to the vehicle-mounted power battery integrated vehicle-mounted charging system, the inherent secondary power pulsation is filtered out to realize active filtering, and the torque pulsation suppression of a multiplexing motor winding is realized through a magnetic flux balance method, so that the vehicle-mounted power battery integrated vehicle-mounted charging system with an isolation charging characteristic is obtained, the integrated design of a driving charging function is realized, and the reliability and the safety of the integrated charging system are improved.

Provided is an electrolytic capacitor including a capacitor element and a liquid component. The capacitor element includes an anode foil having a dielectric layer on a surface of the anode foil, and a conductive polymer component in contact with at least a portion of the dielectric layer. The conductive polymer component contains a self-doped conductive polymer. A difference ΔHSP1 between a Hansen solubility parameter HSPp of the self-doped conductive polymer and a Hansen solubility parameter HSPe of the liquid component is 9.0 MPa0.5 or more and 11.4 MPa0.5 or less.

Provided are: an electrolytic capacitor in which a decrease in electrostatic capacity is suppressed even in a high-temperature environment; and a manufacturing method. An electrolytic capacitor comprises: a capacitor element having a positive electrode foil, a negative electrode foil, an electrolytic solution, and a solid electrolyte layer; a case that accommodates the capacitor element; and a sealing body for sealing the case. The sealing body has an elastic body containing an elastomer. The elastomer contains butyl rubber, and is contained in the elastic body at 31 wt% or more. The electrolytic solution contains glycerin in the amount of 40 wt% or more in the solvent of the electrolytic solution.

The invention relates to the field of capacitor detection, in particular to multi-angle detection equipment for electrolytic capacitor production, which comprises a rack, a controller, a multi-channel withstand voltage tester, a disc, a connecting rod, a mounting plate I and the like, the rack is movably connected with a door; the rack is fixedly connected with a controller; the rack is fixedly connected with a multi-channel withstand voltage tester; the rack is rotationally connected with a plurality of discs; each disc is provided with two round holes; each disc is fixedly connected with at least four connecting rods; and the two connecting rods which are symmetrical front and back on each disc are jointly connected with a first mounting plate. Through the arrangement of a disc, a connecting rod, a mounting plate I, a spring piece, an alligator clip, a conductive clamping plate, an L-shaped push plate, a short rod and a push assembly, a metal pin which is not firmly welded is pulled out from a capacitor body by the spring piece in the detection process, so that a multi-channel voltage withstanding tester cannot detect the capacitor body without the metal pin; therefore, the problem that the capacitor body of which the metal pin is not firmly welded is taken as a qualified product manually is avoided.

The invention discloses a cleaning technology for an aluminum foil for an electrolytic capacitor, and belongs to the technical field of electrolytic capacitors. The technology comprises the following steps: (1) cleaning an aluminum foil finished product by adopting an alkaline cleaning agent, including soaking treatment and spraying treatment which are sequentially carried out at 30-70 DEG C; (2) the aluminum foil sequentially enters a pure water cleaning box I and a pure water cleaning box II to be sprayed and cleaned with pure water; and (3) hot air drying is conducted for 2-20 s in a drying box at the temperature of 100-150 DEG C, and cooling is conducted after drying. According to the technology, the surface cleanliness of the aluminum foil can be thoroughly improved, the uniformity of the surface layer after annealing can be optimized, the thickness of the surface layer is reduced, and therefore the surface hole forming characteristic is improved.

The utility model discloses a PCB packaging structure of an electrolytic capacitor semi-embedded in a board, a central point of a capacitor packaging silk-screen, a central point of a distribution forbidding area and a central point of a slotting area are overlapped, the slotting area is located in the distribution forbidding area, and the slotting area is located in an area enclosed by the packaging silk-screen. By means of the design, on one hand, it is ensured that the electrolytic capacitor can accurately correspond to the preset position during installation, the installation problem caused by dislocation is reduced, on the other hand, interference between other elements or circuits and the electrolytic capacitor can be prevented, the electrolytic capacitor can be partially embedded into the PCB body by forming the groove in the PCB body, and the installation efficiency is improved. It is ensured that the electrolytic capacitor does not conflict with other components or external structures due to the size, the shape or the installation position, the problem that some parts possibly exceed the preset installation height during horizontal installation is avoided, and then the risk that the electrolytic capacitor interferes with other components or external structures is avoided.