16results about "Capacitor with electrode distance variation" patented technology

A variable capacitor comprising: a first elongate member comprising a first electrically conductive portion positioned towards a first distal end of the first elongate member and a second electrically conductive portion positioned towards a second distal end of the first elongate member, wherein the first elongate member is configured to pivot on a first fulcrum positioned between the first and second electrically conductive portions, wherein a first distance between the first fulcrum and the first electrically conductive portion of the first elongate member is different to a second distance between the first fulcrum and the second electrically conductive portion of the first elongate member; a second elongate member comprising a first electrically conductive portion positioned towards a first distal end of the second elongate member and a second electrically conductive portion positioned towards a second distal end of the second elongate member, wherein: one of the first and second elongate members is a cathode and the other of the first and second elongate members is an anode, a first capacitor is formed by the respective first electrically conductive portions of the cathode and anode, wherein a capacitance of the first capacitor is a function of a first pivoting angle of the first elongate member on the first fulcrum, and a second capacitor is formed by the respective second electrically conductive portions of the cathode and anode, wherein a capacitance of the second capacitor is a function of the first pivoting angle of the first elongate member on the first fulcrum, the first and second electrically conductive portions of the cathode are connected to a positive voltage of a first electric circuit, the first and second electrically conductive portions of the anode are connected to a negative voltage of the first electric circuit, such that the first and second capacitors are connected in parallel, and wherein: application of an electrical potential difference by the first electric circuit causes pivoting of the first elongate member and a corresponding variation in the capacitance of the first capacitor that is proportional to the electrical potential difference and a corresponding variation in a capacitance of the second capacitor that is inversely proportional to the electrical potential difference, wherein the magnitude of the variations in capacitances of the first and second capacitors are different such that a sum of the capacitances of the first and second capacitor varies as a function of the electrical potential difference.

Provided is a sensing fiber member which can be processed in long lengths, which excels in mass production, which is supple and has an excellent texture, and which is much less costly than a contact sensing fiber member (a piezoelectric yarn) for which a conventional piezoelectric material is used. This sensing fiber member has at least two covering yarns for which covering is achieved by wrapping an insulating fiber serving as a covering material in one direction around a linear conductor constituting a core material, two of the covering yarns being arranged close to each other. The sensing fiber member is characterized by reading changes in resistance and / or changes in capacitance between the linear conductors of the two covering yarns arranged close to each other.

A vibration-driven energy harvester includes: a base; a movable assembly that includes a first movable electrode and a second movable electrode; a first fixed electrode disposed so as to face opposite the first movable electrode; a second fixed electrode disposed so as to face opposite the second movable electrode; an elastic support member having a fixed end fixed to the base, the elastic support member supporting the movable assembly; a first electret formed at least at one of the first movable electrode and the first fixed electrode; and a second electret formed at least at one of the second movable electrode and the second fixed electrode, wherein: a gap distance between a front end of the second movable electrode and a facing surface of the second fixed electrode facing the front end of the second movable electrode is different from a gap distance between a front end of the first movable electrode and a facing surface of the first electrode facing the front end of the first movable electrode.

The variable capacitor includes first and second movable capacitor plate assemblies disposed inside the housing and including first and second movable capacitor plates. A first fixed capacitor plate and a second fixed capacitor plate are disposed proximal to the first and second movable capacitor plates, respectively. The plurality of capacitor plates may comprise concentric cylindrical blades that are variably interengaged, and the first movable capacitor plate and the first fixed capacitor plate may be coaxial with the second movable capacitor plate and the second fixed capacitor plate. A plurality of actuators may be provided to move the first and second movable capacitor plate assemblies forward and backward independently relative to the first and second fixed capacitor plate assemblies, changing the capacitance of the variable capacitor by independently adjusting the amount of interengagement of the capacitor plates of each pair of capacitor plate assemblies.

The utility model discloses a protection device for preventing a micro-capacitor from being damaged, which belongs to the technical field of micro-capacitor protection, and comprises a micro-capacitor body and a wiring terminal arranged on the micro-capacitor body, the bottom of the micro-capacitor body is detachably connected with a base, and the wiring terminal is arranged on the micro-capacitor body. The base is provided with a placing groove which forms an embedded structure with the bottom end of the micro-capacitor body, the outer side of the base is provided with a ring sleeve, the inner wall of the ring sleeve is provided with an internal thread, the outer side of the micro-capacitor body is detachably connected with a protective cover, the inner diameter of the bottom end of the protective cover is matched with the outer diameter of the micro-capacitor body, and the inner diameter of the bottom end of the protective cover is matched with the outer diameter of the micro-capacitor body. And the root part of the outer wall of the protective cover is provided with an external thread which is in threaded connection with the internal thread, so that the micro capacitor body can be effectively prevented from being extruded and damaged in the transportation process, the wiring terminal can be prevented from being bent and falling off, and a very good protection effect on the micro capacitor body is achieved.

The present application relates to the technical field of matcher device, especially to a matcher device suitable for high pressure working environment, which aims at the problem that the existing radio frequency matcher cannot be adapted and optimized for the high pressure environment formed by the injection of sulfur hexafluoride into a sealed tank, is prone to abnormal operation or even stoppage failure under the action of high pressure in the tank, and cannot meet the use requirements of special experimental scenes, and proposes the following technical scheme: a matcher shell is provided with two groups of baffles; two groups of capacitors are arranged between the two groups of baffles, and adjusting mechanisms are arranged at two ends of the capacitors respectively, the adjusting mechanisms are used for adjusting the capacitance value of the capacitors to dynamically adjust the self impedance of the matcher; and a circuit board is installed in the matcher shell. The matcher can be used in high pressure working environment, is safe and convenient, and has good social and economic benefits.

This invention discloses a variable vacuum capacitor capable of rapidly switching large capacitance values, comprising a first capacitor, a second capacitor, an intermediate electrode disk, and a driving device. The first capacitor includes a first electrode group A and a first electrode group C, and the second capacitor includes a second electrode group B and a second electrode group C. The intermediate electrode disk is disposed between the first and second capacitors, and the first and second electrode groups C are respectively fixed on opposite sides of the intermediate electrode disk. The second electrode group B is electrically connected to a moving disk. Conductive protrusions are provided on the intermediate electrode disk and / or the moving disk. The driving device drives the moving disk to reciprocate relative to the intermediate electrode disk, thereby switching the second capacitor between an open-circuit state and a short-circuit state. In the short-circuit state, the moving disk and the intermediate electrode disk are connected and conductive through the conductive protrusions. This invention achieves rapid switching of large capacitance values ​​by changing the short-circuit and open-circuit states of the second capacitor.

The variable capacitor includes an enclosure having a first conductive collar and a second conductive collar separated by an electrically insulating intermediate element. A movable capacitor plate assembly is electrically coupled to the first conductive collar, and a stationary capacitor plate assembly is electrically coupled to the second conductive collar. An actuator extends into the enclosure to advance and retract the movable capacitor plate assembly relative to the stationary capacitor plate assembly. A hermetically sealed volume within the enclosure includes a fluid dielectric that acts as a dielectric between the capacitor plates of the movable capacitor plate assembly and the capacitor plates of the stationary capacitor plate assembly. A flexible structure is provided to accommodate the displaced fluid dielectric when the movable capacitor plate assembly is advanced relative to the stationary capacitor plate assembly.

A variable capacitor comprising: a first elongate member comprising a first electrically conductive portion positioned towards a first distal end of the first elongate member and a second electrically conductive portion positioned towards a second distal end of the first elongate member, wherein the first elongate member is configured to pivot on a first fulcrum positioned between the first and second electrically conductive portions, wherein a first distance between the first fulcrum and the first electrically conductive portion of the first elongate member is different to a second distance between the first fulcrum and the second electrically conductive portion of the first elongate member; a second elongate member comprising a first electrically conductive portion positioned towards a first distal end of the second elongate member and a second electrically conductive portion positioned towards a second distal end of the second elongate member, wherein: one of the first and second elongate members is a cathode and the other of the first and second elongate members is an anode, a first capacitor is formed by the respective first electrically conductive portions of the cathode and anode, wherein a capacitance of the first capacitor is a function of a first pivoting angle of the first elongate member on the first fulcrum, and a second capacitor is formed by the respective second electrically conductive portions of the cathode and anode, wherein a capacitance of the second capacitor is a function of the first pivoting angle of the first elongate member on the first fulcrum, the first and second electrically conductive portions of the cathode are connected to a positive voltage of a first electric circuit, the first and second electrically conductive portions of the anode are connected to a negative voltage of the first electric circuit, such that the first and second capacitors are connected in parallel, and wherein: application of an electrical potential difference by the first electric circuit causes pivoting of the first elongate member and a corresponding variation in the capacitance of the first capacitor that is proportional to the electrical potential difference and a corresponding variation in a capacitance of the second capacitor that is inversely proportional to the electrical potential difference, wherein the magnitude of the variations in capacitances of the first and second capacitors are different such that a sum of the capacitances of the first and second capacitor varies as a function of the electrical potential difference.

A variable capacitor includes an enclosure having first and second conductive collars separated by an intermediate electrically insulating element. A movable capacitor plate assembly is electrically coupled to the first conductive collar, and a fixed capacitor plate assembly is electrically coupled to the second conductive collar. An actuator extends into the enclosure for advancing and retracting the movable capacitor plate assembly relative to the fixed capacitor plate assembly. A hermetically sealed volume within the enclosure contains a dielectric fluid serving as a dielectric between a capacitor plate of the movable capacitor plate assembly and a capacitor plate of the fixed capacitor plate assembly. A flexible structure is provided to contain the dielectric fluid displaced when the movable capacitor plate assembly is advanced toward the fixed capacitor plate assembly.

The present invention relates to a radio frequency (RF) microelectromechanical system (MEMS) switch comprising a substrate, a first signal conductor on the substrate, ground conductors supported on both sides of the first signal conductor on the substrate, and a MEMS bridge having at least one end mechanically connected to the substrate by at least one anchor, wherein the MEMS bridge comprises a variable capacitor region provided on the first signal conductor, the variable capacitor region comprising a first dielectric layer and a first conductive layer, the first conductive layer positioned on the surface of the first dielectric layer facing the substrate. The RF MEMS switch is provided, comprising a substrate comprising one or more pull-down substrate conductors, the MEMS bridge comprising one or more operable conductors located between an anchor and a variable capacitor region and provided on one or more pull-down substrates, at least one of the one or more operable conductors comprising an embedded portion extending longitudinally along the MEMS bridge between the first and second longitudinal conductive portions.

The invention relates to a microelectromechanical MEMS component (100) for determining ambient pressure and / or sound pressure, with a parallel capacitance plate structure (101), wherein the capacitance plate structure (101) comprises a static electrode (103) and a movable electrode (105) mounted to be deflectable relative to the static electrode (103) along a deflection direction (D), wherein the static electrode (103) comprises a first static electrode plate (107) and a second static electrode plate (109), wherein the movable electrode (105) comprises a first movable electrode plate (111) and a second movable electrode plate (113) connected to the first movable electrode plate (111), wherein the first static electrode plate (107) and the second static electrode plate (109) are spaced apart from each other along the deflection direction (D).wherein the first static electrode plate (107) defines a first functional layer (F1) and the second static electrode plate (109) defines a second functional layer (F2) of the MEMS component (100), wherein the first movable electrode plate (111) is arranged in the second functional layer (F2) and is positioned opposite the first static electrode plate (107), wherein the second movable electrode plate (113) is arranged in the first functional layer (F1) and is positioned opposite the second static electrode plate (109), and wherein the first and second movable electrode plates (111, 113) can be deflected together from the first and second functional layers (F1, F2) by deflecting the movable electrode (105).

The utility model discloses a motor integrated variable vacuum capacitor, which comprises a vacuum capacitor and a motor, the vacuum capacitor comprises two electrode groups and a positioning rod fixed on one electrode group, and an output shaft of the motor is directly connected with the positioning rod in a threaded manner. The motor is used for driving the positioning rod to do linear motion in the axial direction through the output shaft so as to change the relative position of the two electrode sets. According to the utility model, by adopting the integrated structure design and installation mode that the output shaft of the motor is directly connected with the positioning rod of the vacuum capacitor, the influence of connecting pieces and mutual fit clearances thereof on the position of an electrode group of the variable vacuum capacitor is reduced, the capacitance precision of the variable vacuum capacitor is improved, and the volume of the variable vacuum capacitor is greatly reduced; and meanwhile, the manufacturing cost is reduced, and the requirements on high capacitance precision and miniaturization of the variable vacuum capacitor in the field of semiconductor manufacturing equipment are met.

The invention relates to a micro-electromechanical MEMS component (100) for determining ambient pressure and / or acoustic pressure, comprising a parallel capacitive plate structure (101) comprising a fixed electrode (103) and a movable electrode (105); the fixed electrode comprises first and second fixed electrode plates (107, 109); the movable electrode comprises a first movable electrode plate (111) and a second movable electrode plate (113) connected with the first movable electrode plate (111); the first and second fixed electrode plates are spaced apart from each other in an offset direction; defining a first functional layer (F1) of the MEMS component by means of the first fixed electrode plate and defining a second functional layer (F2) by means of the second fixed electrode plate; the first movable electrode plate is arranged in the second functional layer and is arranged opposite to the first fixed electrode plate; the second movable electrode plate is arranged in the first functional layer and is arranged opposite to the second fixed electrode plate; the first and second movable electrode plates may collectively be offset from the first and second functional layers by offset of the movable electrodes.