450 results about "Types of capacitor" patented technology

An AC/DC/AC power converter is constructed without using any electrolytic capacitor, such that it is more compact, durable and reliable. This converter only required a small capacitance for its DC link and this capacitor can be easily obtainable with other types of capacitors such as film or ceramic type. The system further includes means to disconnect both input and output to this DC bus capacitor. A controller capable of fast monitoring the DC bus voltage is also able of quickly disconnecting the capacitor out of either input or output energy path to prevent the capacitor from being charged to over-voltage. The controller also possesses capability of re-connecting the disrupted energy path once the DC bus voltage returns to normal.

Disclosed are in-vivo interstitial antennas (IVIAs) for thermal treatment and deactivation of tumors by means of microwaves. An IVIA comprises a microwave monopole antenna (MMA) and a medical catheter, and the MMA is inserted into the medical catheter to form the IVIA. The MMA comprises coaxial cable and three types of capacitors. The coaxial cable consists of first and second conductors and a first insulator, and only the first conductor extends less than a quarter wavelength. The first capacitor is located around the end of the extended first conductor and includes the second insulator and the third conductor. The second and third capacitors are located between the first capacitor and the apertures of the MMAs and have about same function. Because of arbitrarily changed input impedance of the first capacitor, almost perfect matching can be achieved and desirable temperature distributions can be obtained due to the second and third capacitors.

In order to provide a built-in capacitor type wiring board capable of preventing misalignment of the capacitor, a capacitor built-in type wiring board is provided which includes a core board; a multilayer portion disposed on at least one side of the core board and formed by a plurality of interlayer insulating layers; and a plurality of conductor layers alternately laminated on the core board. The capacitor is of a chip-like shape with first and second main surfaces and includes a dielectric layer; electrode layers laminated on the dielectric layer; and a hole portion opening at least at the second main surface. The capacitor is embedded in the interlayer insulating layers so that the second main surface faces the core board.

The present invention concerns electrode materials capable of redox reactions by electrons and alkaline ions exchange with an electrolyte. The applications are in the field of primary (batteries) or secondary electrochemical generators, super capacitors and light modulating system of the super capacitor type.

An on-line monitoring system of capacity device media loss consists of tester being connected to central computer through radio network, server and Internet network for realizing signal filtering, signal quantization, signal storage and signal retransmission; central computer for carrying out calculation, storage and analysis of collected data; current sampling circuit connected to capacity device and said tester for leading the sampling signal to tester.

The invention discloses a maximum power tracking method for a solar energy power supply system and the solar energy power supply unit thereof, relating to solar power generation technical field. And the method tracks the maximum power of the solar energy system by dynamic balancing. According to the method, it adds in intelligent charging-discharing mechanism to form an intelligent coordination solar energy device, comprising at least a solar panel, super capacitor, DC/DC buck-boost converter, pulse width modulation driver, storage battery, logic controller and load; and the method is characterized in that an instant power type super capacitor is connected between the solar panel and the DC/DC buck-boost converter to act as an energy dynamic balancer; it converts the electric energy produced by the solar panel into capacitor type electric energy to make the maximum power calculation, able to largely simplify calculation program, improving tracking calculation real-timeness and reliability and raising solar energy system efficiency. And the invention can be widely applied to solar LED lamps, and solar energy lamps, especially solar energy street lamps, solar traffic signal lamps, solar energy engineering lamps, etc.

The invention belongs to the technical field of analog-to-digital converters and particularly relates to a successive approximation type analog-to-digital converter of a self-calibration bridge-connection capacitor structure. The successive approximation type analog-to-digital converter of the self-calibration bridge-connection capacitor structure comprises a sample hold circuit, a comparer, a logic control circuit, a digital-to-analog converter and a calibrating circuit, wherein the capacitor-type digital-to-analog converter is of a redundant capacitor bridge-connection structure, and a redundant capacitor and an auxiliary capacitor are added in the bridge-connection structure; meanwhile, a calibrating algorithm is built in a calibration control unit and a calibration processing unit, and nonlinear characteristics caused by mismatch and parasitism of a manufacturing process in the bridge-connection capacitor structure are measured through the redundant capacitor bridge-connection structure in the calibration detection stage; in the normal analog-to-digital converting process, the calibration processing unit performs postprocessing on digital output of the analog-to-digital converter according to detected nonlinear information and outputs a calibrated digital signal.

The invention relates to a series capacitor type high-voltage direct current breaker and a control method thereof. The breaker comprises direct current breaker units which are connected in series, and each direct current breaker unit comprises a change-over switch, a switching circuit and an energy consumption device which are connected in parallel. The change-over switch adopts a mechanical switch, and the switching circuit adopts a resistance capacitance branch circuit, and the energy consumption device adopts a lightning arrester. The high-voltage direct current breaker is connected with a control circuit, and the mechanical switch detects failure current and acts at the T1moment, and transfers the failure current into the resistance capacitance branch circuit. The failure current charges a capacitor, and controls switching-on and switching-off of the mechanical switch. Before the mechanical switch witches off at the T2 moment, charging voltage on two ends of the capacitor throughout is lower than arcing voltage at fractures of the mechanical switch. When the voltage on two ends of the capacitor reaches operation voltage of the lightning arrester, the control circuit controls the lightning arrester to act at the T3 moment so that energy can be released from the lightning arrester. According to the series capacitor type high-voltage direct current breaker and the control method thereof, the mechanical switch does not have electric arc, non-arc breaking off is realized, energy is released through utilization of the lightning arrester, quick extinguishing of the electric arc is realized, and the failure current is cut off.

The present invention provides a capacitor type touch screen substrate adhibiting method which comprises the following main steps: firstly, preparing a strip of frame adhesive with an opening by adhesive on the perimeter of abutted surface of substrate of one prepared substrate; after attaching the upper substrate and the lower substrate together, forming a cavity between two abutted surfaces of substrate; executing vacuum pumping to the cavity through an opening; after contacting the opening with the liquid adhesive, pressurizing the periphery of adhesive so that the adhesive is injected into the cavity depending on the vacuum differential pressure or capillarity; and finally solidifying the adhesive injected into the cavity thereby obtaining the finished product of capacitor type touch screen. The invention can reduce or avoid the air bubble generated in attaching the upper substrate and the lower substrate and has the advantages of increased product quality, increased finished product rate, increased production efficiency, etc.

The invention relates to a capacitor type touch-control screen, comprising a substrate provided with an air surface and a film surface as well as a touch-control screen film layer arranged at the film surface side of the substrate; the touch-control screen film layer comprises an ITO layer, an insulation layer, a conduction layer and a film layer protection layer; the conduction layer is internally provided with running metal distributed around the substrate; and a mark layer capable of masking the running metal is arranged between the film surface of the substrate and the touch-control screen film layer. By arranging the mark layer capable of masking the running metal between the film surface of the substrate and the touch-control screen film layer, a transparent cover plate arranged at the air surface side of the substrate is avoided, therefore, transmittivity of the touch-control screen panel is enhanced, reflectivity of the film layer is reduced, the integral ground color of the touch-control screen is uniform and the visual effect is improved; the contrast of the touch-control screen is improved and the working efficiency of the backlight can be reduced. Meanwhile, all the film layers are arranged at the film surface side of the substrate, thus ensuring the levelability of the air surface of the substrate. The invention further provides a process method for the capacitor type touch-control screen.

A vehicle collision detecting device includes a capacitor type sensor mounted on a portion of the vehicle, a resonant circuit connected to the sensor by a lead wire and a microcomputer for judging a collision with an object and a breakdown of the lead wire. The sensor has a pair of plate electrodes and a dielectric member disposed between the electrodes so that its capacitance changes if the sensor is crushed. The resonant circuit is constituted of an oscillator generating an ac signal of a fixed frequency, a coil and a diagnostic capacitor. The microcomputer judges which of collision and wire breakdown takes place based on the voltage appears on the lead wire when the oscillator generates the signal of a fixed frequency.

The invention relates to electronic device having an operation temperature range, wherein the electronic device comprises a tunable capacitor (CST) comprising a first electrode (BE), a second electrode (TE), and a dielectric (FEL) arranged between the first electrode (BE) and the second electrode (TE). The dielectric (FEL) comprises dielectric material (FEL) having a value of a relative dielectric constant (ε_r) varying at least within the operation temperature range. The electronic device further comprises a temperature varying means (RES) being thermally coupled to the tunable capacitor for providing a temperature of the dielectric (FEL) causing a predetermined capacitance of the tunable capacitor (CST). The invention, which relies on the idea of varying temperature to vary a capacitance of a capacitor stack, provides an alternative tunable capacitor type for the known types. Advantageous embodiments feature high-tuning ratio, small device area, and stable capacitance value in case the temperature is well controlled. The invention further relates to a semiconductor device comprising the electronic device in accordance with the invention, to an electronic circuit comprising such electronic device, and to a method of manufacturing such electronic device.

The invention provides a switched capacitor DC-DC converter. The switched capacitor DC-DC converter comprises an output sampling branch, a dead area control module for generating the dead area and outputting multiunit clock signals which has the same frequency as the input clock, a switched capacitor array module for receiving multiunit clock signals which are not overlapped and sent by the dead area control module, an error amplifier for receiving the voltage signal from the output sampling branch and the reference voltage signals, and a voltage controlled oscillator for receiving the output voltage signals of the error amplifier and for outputting the clock signals with corresponding frequency. The voltage controlled oscillator sends the clock signals to the dead control module. The frequency variation of the clock signals is in proportion to the output voltage variation of the error amplifier. The converter has low output voltage ripple and high efficiency in full load range.

Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical to this function, aluminum-electrolytic capacitors store and deliver life-saving bursts of electric charge to the heart. This type of capacitor requires regular “reform” to preserve its charging efficiency over time. Because reform expends valuable battery energy, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90% of their rated voltage and allowing the charge to dissipate through system leakage for a period of time, before discharging through a non-therapeutic load.

The invention provides a 12-bit intermediate-rate successive approximation type analog-digital converter and relates to the field of analog-digital converters. The 12-bit intermediate-rate successive approximation type analog-digital converter comprises a sampling network, a differential capacitor array connected with the sampling network, and a comparator circuit connected with the differential capacitor array, wherein the differential capacitor array comprises a first capacitor array connected with the positive-phase input end of the comparator circuit, and a second capacitor array connected with the negative-phase input end of the comparator circuit; both the first capacitor array and the second capacitor array are composed of 11 groups of binary-structured bit capacitors, and the bottom plates of the redundant capacitors of the second capacitor array are constantly connected with a common-mode voltage VCM. The 12-bit intermediate-rate successive approximation type analog-digital converter solves the problems of large capacitor area and high power consumption of a traditional binary capacitor type structure.

The invention relates to a capacitance horizontal axis micro-mechanical tuning fork gyroscope which is characterized by including an underlay, anchor points, a detection folding beam, a framework, a drive folding beam, a detection quality block, a drive comb capacitance and a detection comb capacitance; the drive comb capacitance and the detection comb capacitance respectively include a movable electrode and a fixing electrode; the anchor points, the detection folding beam, the framework, the detection quality block, the drive comb capacitance and the detection comb capacitance are symmetrically arranged relative to the X-axis and the Y-axis of the gyroscope; the movable electrode of the drive comb capacitance is fixedly connected with the detection quality block; the detection quality block is connected with the framework by the drive folding beam; the movable electrode of the detection comb capacitance is connected with the framework; the framework is connected with the anchor points by the detection folding beam; the anchor points are fixedly connected with the underlay; the fixing electrode of the drive comb capacitance and the fixing electrode of the detection comb capacitance are fixedly connected with the underlay by the anchor points of each own. The capacitance horizontal axis micro-mechanical tuning fork gyroscope has a simple technical process, can be compatible with a Z-axis tuning fork gyroscope, can be used for realizing a chip triaxial gyroscope and can realize batch production.

Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical components in these devices are aluminum electrolytic capacitors, which store and deliver one or more life-saving bursts of electric charge to a heart of a patient. This type of capacitor requires regular “reform” to preserve its charging efficiency over time. Because reform expends valuable battery life, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90% of their rated voltage and maintaining this voltage for about five minutes before discharging them.

A consumable material (the ink of ink-jet printer or the powder of laser printer) container with a circuit to measure the residual consumable material in it has a detecting unit for detecting the electric signal on the terminal of piezoelectric element, a signal source A for generating electric signal on the terminal of piezoelectric element, a capacitor-type electrode unit consisting of two insulated electrodes (the consumable material as a medium between them), a signal source B for outputting pulse signal to one electrode of said capacitor-type electrode unit, and a sampling unit for measuring the signal attenuation from another electrode and in turn the residual consumable material.

The invention relates to a preparation method of a nanometer compounding capacitor type desalting electrode of a carbon nanometer pipe/graphene sandwich structure. According to the invention, carbon nanometer pipes in a composite electrode material are uniformly supported among grapheme layers to form a sandwich structure, and one end of each carbon nanometer pipe is connected with stripping graphene. According to the invention, the carbon nanometer pipes situ grow through chemical vapor deposition on graphene surface, thereby realizing low-cost and large-scale preparation of the carbon nanometer pipe/graphene sandwich structure nanometer composite material; and the carbon nanometer pipe/graphene sandwich structure nanometer composite material and polytetrafluoroethylene latex liquid are coated on a piece of graphite paper in a mixing uniformity manner, and the carbon nanometer pipe/graphene sandwich structure nanometer compounding capacitor type desalting electrode is prepared after drying. The prepared carbon nanometer pipe/graphene sandwich structure nanometer composite electrode provided by the invention has good conductibility, good desalting performance, and has potential application prospects on a low energy-consumption and low-cost capacitor type desalting aspect.

The invention discloses a high-power-factor LED (Light Emitting Diode) constant-current driving power supply without an electrolytic capacitor. The high-power-factor LED constant-current driving power supply comprises an alternating-current input power supply vin, a bridge rectifying circuit, a main switch tube, an energy storing capacitor, a freewheel diode, an auxiliary circuit, a transformer, a rectifying circuit and a filter capacitor. The high-power-factor LED constant-current driving power supply is mainly technically characterized in that: a flyback converter topology is adopted, and working in a discontinuous current mode is performed, so that power factor calibration is realized automatically, and a high input power factor is obtained; and meanwhile, the energy storing capacitor is arranged in a main circuit, redundant energy is stored in the energy storing capacitor when the input power pin is higher than output power Po, and insufficient energy is provided by the energy storing capacitor when the input power pin is lower than output power Po, so that constant working current can be provided for an LED. Meanwhile, voltage pulsation on the energy storing capacitor is high, and the capacitance values of a needed energy storing capacitor and filter capacitor are low, so that other types of capacitors of non-electrolytic-capacitor type such as ceramic capacitors and the like can be adopted.

The invention relates to a segmental capacitor type continuous liquid level sensor, and in particular relates to a capacitor type sensor for measuring continuous liquid level. Inner electrodes, outer electrodes, a connection bush, coupling screws, soldering flakes, a cable and a digital processor are arranged in the sensor, wherein the outer electrodes are divided into an odd group and an even group; the soldering flakes are riveted on the outer electrodes through rivets, used for connecting the cable, and connected in series with the odd group and the even group respectively; the outer electrodes are sequentially connected together through the connection bush and fixed by use of the coupling screws; the inner electrodes and the outer electrodes are concentrically mounted to form an annular capacitor, namely the segmental capacitor; and the signals of the segmental capacitor sensor are processed by the digital processor which outputs the liquid level height. The sensor provided by the invention has the advantages of high measurement resolution, wide measurement range, fast dynamic response and the like, realizes automatic calibration and saves zero setting.