1266 results about "Electrolytic capacitor" patented technology

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.

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

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 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 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.

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.

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 provides a method for predicting the service life of an electrolytic capacitor, which comprises the following steps of: taking environment temperature, operation time and equivalent series resistance (ESR) which is calculated based on ripple voltage and ripple current and is subjected to temperature compensation as input data, and taking the residual service life RUL of the electrolytic capacitor as a label; according to the failure mechanism of the electrolytic capacitor, when the ESR is increased to two times of the initial value of the ESR, it is indicated that the electrolyte is obviously lost, the capacitor fails to form a failure threshold value, and based on the failure threshold value, the RUL corresponding to each time point in historical monitoring is reversely deduced in combination with operation time data; then, performing normalization processing on the multi-source heterogeneous data to eliminate dimensional differences, and constructing a standardized data set suitable for model training; training and evaluating the model to obtain a model with residual life prediction capability; according to the technical scheme, the problem that the capacitor core temperature and the online electrolytic capacitor capacitance value required by traditional electrolytic capacitor life prediction are difficult to obtain is solved, and the engineering problem of electrolytic capacitor life prediction is solved.

A solid electrolytic capacitor that includes an anode body having a porous part on surface thereof and a manufacturing method thereof including a step (i) of forming a first solid electrolyte layer on a dielectric layer and a step (ii) of forming a second solid electrolyte layer on the first solid electrolyte layer. The first and second solid electrolyte layers contain first and second conductive polymers, respectively. The step (i) includes a step (i-a) of supplying a reaction solution containing a monomer and a silane compound to the surface of the dielectric layer, and a step (i-b) of forming the first solid electrolyte layer by polymerizing the monomer in the supplied reaction solution to form the first conductive polymer. The monomer contains a compound represented by the following formula (I) (in the formula (I), R represents an alkyl group whose carbon number is within a range of 1 to 10).

To allow attachment of electrolytic capacitors and other relatively large electrical circuit devices to a PCB while meeting size limitations, The PCB can include a full-through opening within which the device can be located. Along one edge of the opening, the PCB includes half-through cuts with a conductive lining extending from the opening, where the pins of the capacitor or other device can rest and form electrical connections. In addition to pins extending radially from one end of the capacitor or other device, the device includes a notch extending from the opposing end. Along the edge of the PCB opening opposing the half-through cuts for the pins, the PCB includes a half-though cut for the device's notch to rest, thereby providing mounting stability.

The utility model provides a short-circuit protection circuit for a Type-C interface, and belongs to the technical field of short-circuit protection circuits. Comprising an interface module, an overvoltage and electromagnetic protection circuit and a switching circuit, the interface module, the overvoltage and electromagnetic protection circuit and the switching circuit are connected in series on the same power line and grounding line, and a common circuit and a standby circuit are arranged in the switching circuit and are both connected with the power line. According to the utility model, through the cooperation of the resettable fuse, the double-pole double-throw relay and other elements, the circuit can be rapidly switched so as to ensure that the interface can continue to work normally without maintenance when a short-circuit fault occurs, and through the synergistic effect of the gas discharge tube, the first transient suppression diode, the second transient suppression diode, the electrolytic capacitor and other elements, the short-circuit fault of the interface can be effectively prevented. The problems of overvoltage and electromagnetic interference during short circuit can be effectively relieved.

A bidirectional AC / DC conversion module based on an IGBT discrete device comprises a capacitor filter plate, an IGBT plate and a bottom plate which are arranged in parallel and fixedly connected, distances are reserved between the capacitor filter plate and the IGBT plate and between the IGBT plate and the bottom plate, the capacitor filter plate is provided with a capacitor assembly, and the IGBT plate is provided with an IGBT module. Two groups of first filter capacitors in the capacitor assembly are respectively arranged at two opposite edges of the capacitor filter plate, so that the distance between the two groups of first filter capacitors is reduced, and heat dissipation is facilitated; all the electrolytic capacitors in the capacitor assembly are located in the middle of the capacitor filtering plate, the electrolytic capacitors are arranged at equal intervals, and heat dissipation air channels are reserved, so that heat dissipation is smooth, and normal operation of all devices is guaranteed.

A solid electrolytic capacitor includes: a capacitor element including an anode part and a cathode part; a substrate that supports the capacitor element; a sealing body that seals the capacitor element; a first external electrode electrically connected to the anode part; a second external electrode electrically connected to the cathode part; and an adhesive layer disposed between the capacitor element and a first surface of the substrate. At an interface between the first surface and the adhesive layer, a maximum height Rz1 of surface roughness of the first surface is 5 μm or more, and a maximum height Rz2 of surface roughness of the adhesive layer is 3 μm or more.

The invention provides an external assembled pin of an electrolytic capacitor, and relates to the technical field of electrical elements. A first groove and two sets of second grooves are formed in the base, first bases and second bases are installed in the two sets of second grooves and connected through bolts, rotating cylinders are installed between the first bases and the second bases through bearings, and bevel gears are fixed to the lower ends of the rotating cylinders. A processing ring is clamped among the three groups of clamping blocks, when a pin of a capacitor body is inserted into the processing ring, a first adjusting rod is rotated to enable the processing ring to rotate, the pin of the capacitor body is polished through the processing ring, an oxide layer on the pin of the capacitor body can be polished off, and the capacitor body is in good contact with a needle cylinder; after the pin of the capacitor body is inserted into the needle cylinder, the locking rod is inserted into the top cylinder, the first control rod is pulled upwards to enable the upper end of the top cylinder to clamp the locking rod, and the pin of the capacitor body is prevented from being separated from the needle cylinder.

The invention discloses an electrolytic capacitor pin defect detection device, and relates to the field of electrolytic capacitor pin detection.The electrolytic capacitor pin defect detection device comprises an equipment frame body, a conveying assembly is arranged in the equipment frame body, and the conveying assembly comprises a driving roller and a driven roller which are installed in the equipment frame body; the outer wall of the driving roller and the outer wall of the driven roller are each sleeved with a rotating roller and a chain wheel, a motor is arranged at one end of the driving roller, a chain is arranged on the outer wall of the chain wheel, the outer walls of the rotating rollers are sleeved with a conveying belt, and a stirring assembly is arranged on one side of the chain. The problem that the detection work efficiency is low when an existing resistor capacitor is detected is solved, the resistor capacitor is placed above the rolling wheels, the stirring assembly can correct the resistor capacitor, the pin of the resistor capacitor is in a horizontal state, and the detection efficiency of the resistor capacitor is improved. Whether the resistor and capacitor pins have flaws is judged by observing the universal meter, and the resistor and the capacitor do not need to be manually taken for detection, so that the working efficiency is improved.

The invention discloses a non-electrolytic capacitor permanent magnet motor control method and system based on a non-linear observer, and the method comprises the steps: introducing a gradient search mechanism based on a stator voltage equation of a permanent magnet synchronous motor under a static coordinate system, and constructing a flux linkage observer equation; acquiring a voltage component and a current component of the permanent magnet synchronous motor in a static coordinate system, and observing the flux linkage observer equation to obtain a real component of a flux linkage amplitude error in a rotating coordinate system; and designing an exponential reaching law adaptive law, introducing an exponential reaching law to dynamically adjust the gradient search gain, and combining the real component of the flux linkage amplitude error under the rotating coordinate system as feedback to obtain the rotor position of the permanent magnet synchronous motor. The estimated flux linkage error value is used as the feedback quantity, and the real position of the rotor of the permanent magnet synchronous motor can be quickly and accurately tracked. The non-electrolytic capacitor permanent magnet motor control method and system based on the non-linear observer can be widely applied to the technical field of permanent magnet motor control.

A power conversion device includes a power factor correction circuit includes: a power semiconductor having a heat radiation surface facing a first principal surface of a cooling plate, fixed to the first principal surface so as to exchange heat with the cooling plate, and electrically connected to a drive board; an electrolytic capacitor disposed on an opposite side of the power semiconductor from the cooling plate and a same side of the power semiconductor as the drive board, and electrically connected to the drive board; and a resin mold that is fixed to the first principal surface of the cooling plate, defines a position of the power semiconductor, and is interposed at least between the power semiconductor and the electrolytic capacitor. A second principal surface of the cooling plate is thermally connected to a housing when the power factor correction circuit module is fixed to the housing.

The invention discloses a life prediction method and system for an integrated gate commutated thyristor, and is applied to the technical field of integrated gate commutated thyristors, and the method comprises the steps: obtaining the rated working voltage, the rated working temperature and the rated ripple current of a to-be-detected integrated gate commutated thyristor; performing Gall distance processing on the obtained real-time capacitance capacity, real-time voltage data, real-time ripple current and real-time temperature data to obtain a to-be-trained data set; obtaining a voltage correction factor, a temperature correction factor and a current correction factor; inputting the voltage correction factor, the temperature correction factor and the current correction factor into an electrolytic capacitor life estimation relational expression to obtain an electrolytic capacitor life estimation value; and inputting the to-be-trained data set and the electrolytic capacitor life estimation value into the driving life prediction model for processing to obtain life prediction data. According to the method provided by the invention, the problem that the life prediction precision is limited in the prior art can be solved, so that the life of the integrated gate commutated thyristor can be accurately predicted.

There is provided a liquid discharge apparatus, in which a substrate unit having a first connector and a piezoelectric element, a reference voltage signal output circuit, an electrolytic capacitor, and a wiring substrate having a plurality of rigid members and a flexible member, the reference voltage signal output circuit has a first front surface and is provided on a first rigid member laminated on the first surface of the first region, the electrolytic capacitor has a second front surface and is provided on a second rigid member laminated on the first surface of the second region, the second connector is provided on a third rigid member laminated on the second surface of the second region, and the first rigid member and the second rigid member are positioned such that a normal direction of the first front surface and a normal direction of the second front surface intersect each other.

Provided are a negative electrode body that can suppress generation of hydrogen gas and an electrolytic capacitor that comprises the negative electrode body. A negative electrode body according to the present invention comprises: a negative electrode foil that comprises a valve action metal; and a carbon layer that includes a carbon material and is layered on the negative electrode foil. Analysis of the carbon material by x-ray photoelectron spectroscopy gives a peak P1 from C-O bonds on the O1s spectrum, a peak P2 from O-C=O bonds on the O1s spectrum, and a peak P3 from C=O bonds on the O1s spectrum. The ratio of the total value of the area ratio [COO] of peak P2 and the area ratio [C=O] of peak P3 to the area ratio [C-O] of peak P1 is ([COO]+[C=O]) / [C-O]<2.0.