28results about "Capacitor with electrode area variation" patented technology

The disclosure provides a multilayer ceramic electronic component including: a ceramic main body including a capacitance forming part, an edge part, and a cover part, the capacitance forming part including a dielectric layer, a first internal electrode, and a second internal electrode, the first and second internal electrodes being disposed to be stacked in a third direction with the dielectric layer interposed therebetween, the edge part being disposed on both surfaces of the capacitance forming part in a second direction, the cover part being disposed on both surfaces of the capacitance forming part in the third direction; first and second external electrodes disposed on first and second surfaces of the ceramic main body opposite to each other in a first direction, respectively; and an auxiliary electrode spaced apart from the capacitance forming part and disposed to be in contact with one of the first and second external electrodes. The auxiliary electrode is spaced apart from the first and second surfaces of the ceramic main body in the first direction.

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 vacuum capacitor, include: two electrode disc, directly or indirectly connect in two electrode disc and be configured with vacuum chamber in its inside insulating shell and two electrode groups that are fixed respectively in the inner end face of two electrode disc opposite each other and contain in vacuum chamber, two electrode groups all include a plurality of sheet shape interval arrangement distribution's electrode sheet, while the electrode sheet of two electrode groups extends to each other and does not contact each other mutually in parallel, so that the electrode sheet of two electrode groups presents the alternate distribution along the arrangement direction. The utility model discloses by adopting a plurality of sheet shape interval arrangement distribution's electrode sheet, can greatly simplify manufacturing process, has reduced the equipment procurement cost, makes vacuum capacitor's manufacturing cost and production cycle greatly drop, and product volume can achieve smaller, satisfies user to vacuum capacitor miniaturization and low cost's requirement.

A vacuum container (10) comprises a mesh tubular conductive path (5) that is stretchable in the axial direction and that is coaxially provided on the outer circumference side of a tubular bellows (4) in the vacuum container (10). The mesh tubular conductive path (5) is obtained by superposing, in multiple stages in the axial direction, elastic conductors (6) that each extend in an undulating form along the circumferential direction of the mesh tubular conductive path (5). In a pair of stages that are adjacent to each other in the axial direction among the multiple stages in which the elastic conductors are superposed, a curved portion that protrudes in the adjacent direction among curved portions (61, 62) provided to one of the pair of stages and a curved portion that protrudes in the adjacent direction among curved portions (61, 62) provided to the other of the pair of stages face each other in the adjacent direction, and are fixed to each other to form a fixed portion (71). In the pair of stages, fixed portions (71) and gap portions (7(2) are alternately and repeatedly provided along the circumferential direction.

The present application provides a trigger switch capable of detecting the amount of pressing of a trigger subjected to a pressing operation in a non-contact manner and excluding the influence of an external environmental magnetic field. The trigger switch (TS) has a first conductive plate (40) (movable electrode) that moves with the movement of a trigger (1) due to a pressing operation, and a second fixed electrode (51) (fixed electrode) that is disposed apart by a gap in the vicinity of the movement range of the first conductive plate (40) and forms a capacitor with the first conductive plate (40). The electrostatic capacity of the capacitor formed by the first conductive plate (40) and the second fixed electrode (51) of the trigger switch (TS) changes with the movement of the first conductive plate (40).

To provide a technology that can contribute to making it easier to obtain desired high-frequency current carrying capacity and operability. [Solution] A meshed tubular conductive path portion 5, which is expandable and contractible in the axial direction, is coaxially provided on the outer periphery of a cylindrical bellows 4 within a vacuum vessel 10. The meshed tubular conductive path portion 5 is formed by stacking elastic conductors 6, each shaped like a wave extending in the circumferential direction of the meshed tubular conductive path portion 5, in multiple stages in the axial direction. In a pair of adjacent stages in the axial direction among the stacked stages, a curved portion 61, 62 on one of the stages that is convex in the adjacent direction and a curved portion 61, 62 on the other of the stages that is convex in the adjacent direction are positioned opposite each other in the adjacent direction and are fixed to each other, thereby forming a fixed portion 71. In the stages, fixed portions 71 and gaps 72 are alternately provided along the circumferential direction.

The invention discloses an adjustable capacitor, which comprises an inner electrode and an outer electrode, the outer electrode is coaxially sleeved outside the inner electrode; the medium sleeve is arranged between the inner electrode and the outer electrode; one shaft end of the limiting piece extends into the outer electrode and is in contact with the outer electrode; one shaft end of the driving part extends into the limiting part and is connected with the outer electrode, the limiting part is matched with the driving part in an abutting mode to limit axial movement of the driving part, and when the driving part rotates in the circumferential direction, the outer electrode moves in the axial direction of the inner electrode so as to continuously change the overlapping area of the outer electrode and the inner electrode; the outer protection sleeve is arranged outside the outer electrode in a sleeving mode, and the two shaft ends of the outer protection sleeve are matched with the inner electrode and the limiting piece respectively so that the outer protection sleeve, the inner electrode and the limiting piece can be assembled into a whole. The invention further discloses an assembly method. According to the invention, real-time, continuous and accurate online tuning can be realized; the operation safety and convenience are greatly improved; the cost and the size are obviously reduced; and high reliability and stability in a high-pressure environment are ensured.

The present disclosure provides a multilayer ceramic electronic component including a ceramic main body having a first surface and a second surface opposite to each other in a first direction, a third surface and a fourth surface opposite to each other in a second direction, and a fifth surface and a sixth surface opposite to each other in a third direction, and an external electrode disposed on one of the third surface and the fourth surface and extending onto the first surface and the second surface. A relationship 0.9 ≤ A / BW < 1.0 is satisfied, where "A" represents a shortest distance in the second direction from an end portion of the ceramic main body on which the external electrode is disposed to an end portion of the external electrode disposed on one of the first surface and the second surface, and "BW" represents a longest distance in the second direction from the end portion of the ceramic main body to the end portion of the external electrode.

A radio frequency power detection device and a radio frequency power detection system are provided. The radio frequency power detection device includes a first microstrip line, a second microstrip line, a voltage detection unit, a capacitor unit, and a distance testing unit. The first microstrip line is connected to a radio frequency power supply. The second microstrip line is disposed parallel to the first microstrip line and coupled to the first microstrip line, and a predetermined point on the second microstrip line is grounded. The voltage detection unit is connected to one end of the second microstrip line and is configured to detect a voltage of the second microstrip line. The capacitor unit is connected to the first microstrip line and the second microstrip line, or the predetermined point on the second microstrip line is grounded through the capacitor unit.

The application relates to the field of electronic technology and discloses a hollow-structure magnetic-field-driven vacuum variable capacitor and radio frequency source matching device, which comprises a base, the top end of the base is connected with an insulating shell, the top end of the insulating shell is provided with a metal shell, and a hollow insulating tube is arranged between the base and the metal shell. In the application, the built-in driving coil in the hollow insulating tube is electrified, the coil generates a magnetic field force under the action of the current, the magnetic field force is coupled to a permanent magnet fixed on the inner moving electrode of the vacuum capacitor, the movable electrode moves perpendicularly to the current direction of the coil, the relative area between the movable electrode and the fixed electrode is changed, the capacitor capacity is changed, compared with the existing variable vacuum capacitor, breakthroughs are made in performance, structure, function and the like, the vacuum capacitor has the characteristics of high speed, high response, high matching precision, increased service life, long-term stable vacuum degree sealing performance and small size.

This invention relates to the technical field of voltage-adjustable capacitors, and discloses a voltage-adjustable capacitor structure and its application based on an ionized double layer. The voltage-adjustable capacitor structure includes: a driving layer comprising an electrodeformable material and matching positive and negative electrodes, the electrodeformable material capable of out-of-plane deformation upon application of voltage; and an ionized capacitor layer comprising an ionically active material with surface microstructures, a pair of electrodes for reading capacitance values, and elastic washers controlling the initial spacing between the electrodes. The ionized capacitor layer is encapsulated with insulating layers on both the top and bottom. This invention utilizes the principle of an ionized double layer, applying voltage to the driving layer to generate out-of-plane deformation, transmitting uniform pressure to the flexible ionized capacitor layer. This causes dynamic changes in the contact area between the ionically active material with surface microstructures and the electronically conductive electrodes. Leveraging the high capacitance density of the double layer, a significant increase in capacitance value from 58 pF to 1200 pF is achieved, with an adjustment ratio exceeding that of existing technologies by 2-8 times.

This invention discloses a high-precision fixed-capacitance vacuum capacitor, comprising: a shell, two electrode disks, and two sets of electrode groups. The two electrode disks are respectively fixedly connected to both ends of the shell and enclose a vacuum chamber. The two sets of electrode groups are respectively mounted on the two electrode disks and coupled to each other within the vacuum chamber. At least one set of electrode groups includes a fine-tunable electrode ring, and at least one electrode disk is equipped with an adjustment mechanism. The adjustment mechanism is connected to the fine-tunable electrode ring and can adjust the axial position of the fine-tunable electrode ring in the vacuum chamber to change the coupling length between the fine-tunable electrode ring and the other electrode group. This invention enables fine-tuning of the capacitance value of the vacuum capacitor, achieving precise adjustment of the capacitance value without changing the overall height of the vacuum capacitor, ensuring product size consistency, avoiding interference with user installation, and reducing operational difficulty and complexity.

The present invention comprises a polygonal cylinder-like conductive wall part (5) which can extend / contract in the axial direction with respect to the outer peripheral side of a bellows (4) inside a vacuum container (10) and has a larger diameter than the bellows (4). A cutout part (61) having a shape penetrating in the radial direction and extending in the axial direction is provided at a central part, in the axial direction, of each corner part (6) positioned on each ridge line of the conductive wall part (5). In each of side wall parts (7) positioned between the ridge lines of the conductive wall part (5) and extending in the axial direction, an inter-cutout portion (71) positioned between the pair of cutout parts (61), facing each other in the circumferential direction, of the side wall part (7) is configured to be curved outward in the radial direction or curved inward in the radial direction. Each of the corner parts (6) has only one of the cut-out parts (61) or a plurality of the cut-out parts (61).

The application provides a vacuum capacitor and a radio frequency matching device. The vacuum capacitor comprises a shell assembly, a magnetic levitation driving coil set, a magnetic levitation mover, a connecting piece, a shielding piece, a movable electrode and a fixed electrode. The shell assembly is arranged along the direction of an axis and has a closed vacuum chamber formed inside. The magnetic levitation mover, the connecting piece, the shielding piece, the movable electrode and the fixed electrode are all accommodated in the vacuum chamber. The shielding piece divides the vacuum chamber into a first region and a second region. The movable electrode is movably arranged in the first region along the direction of the axis, the fixed electrode is fixedly arranged in the first region, the magnetic levitation mover is movably arranged in the second region along the direction of the axis, the connecting piece penetrates through the shielding piece along the direction of the axis and is connected with the magnetic levitation mover and the movable electrode respectively, and the magnetic levitation driving coil set is arranged outside the shell assembly corresponding to the second region and is used for driving the magnetic levitation mover and moving the movable electrode along the direction of the axis through the connecting piece.

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 capacitance increasing device for increasing the capacitance between a first machine element (22), in particular a housing (22a) of an electromechanical transducer (10), and a second machine element (16), in particular a shaft (16a) of the electromechanical transducer (10), which is mounted in a rotatable manner relative to the first machine element (22), the capacitance increasing device (24) has a first electrode (26) having a first electrode body (30) and a first electrode surface (27), the first electrode (26) being arranged at a distance from a second electrode (28) during operation of the electromechanical transducer (10), the second electrode having a second electrode body (34) having a second electrode surface (29), the second electrode surface (29) being arranged at a distance from the first electrode body (30). A functional increasing capacitance (Ce) is formed by means of a first electrode (26) and a second electrode (28), the first electrode (26) being connected in an electrically conductive manner to the first machine element (22) and the second machine element (16) forming a second electrode surface (29), in particular the second electrode (28) forming the second electrode surface (29), the second machine element is coupled to the first electrode (26) in a capacitive manner, in particular the second machine element is coupled to the first electrode surface (27) in a capacitive manner.

This utility model belongs to the field of capacitor technology and discloses a variable vacuum capacitor. The variable vacuum capacitor includes a stationary phase group, a moving phase group, a positioning nut, a rotating screw, a support sleeve, an adapter, and a first limiting member. The moving phase group is arranged opposite to the stationary phase group, and the moving phase group can change its relative distance to the stationary phase group to adjust the capacitance value. The positioning nut is drivenly connected to the moving phase group. The rotating screw is threadedly connected to the positioning nut. The rotating screw passes through the support sleeve. The adapter is connected to the end of the rotating screw away from the moving phase group, and the adapter abuts against the end of the support sleeve away from the moving phase group. The first limiting member is located at one end of the rotating screw. When the positioning nut moves the moving phase group closer to the stationary phase group, the positioning nut abuts against the first limiting member to prevent the rotating screw from disengaging from the threaded connection with the positioning nut. This utility model can prevent the rotating screw from disengaging from the positioning nut, avoid damage to the variable vacuum capacitor, and ensure safety.

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.

This technology contributes to making it easier to obtain the desired high-frequency current conduction capability and operability. [Solution] A mesh cylindrical conductive path section 5, which is expandable and contractible in the axial direction, is provided coaxially on the outer circumference of a cylindrical bellows 4 inside a vacuum container 10. The mesh cylindrical conductive path section 5 is made up of elastic conductors 6, which have a wavy shape extending along the circumferential direction of the mesh cylindrical conductive path section 5, superimposed in multiple stages in the axial direction. In each of the multiple stages superimposed, a pair of stages adjacent to each other in the axial direction are fixed together by the curvature of one of the curved sections 61, 62 provided on the pair of stages, which is convex in the direction of the adjacent stage, and the curvature of the other of the curved sections 61, 62 provided on the pair of stages, which is convex in the direction of the adjacent stage, being positioned opposite each other in the direction of the adjacent stage and being fixed together, thereby forming a fixed portion 71. In the stages, the fixed portion 71 and the gap portion 72 are provided alternately and repeatedly along the circumferential direction.

To provide an electrode capable of reaching higher voltage, and a vacuum capacitor provided with the electrode.SOLUTION: An electrode unit for a vacuum capacitor is provided with a belt-like capacitor plate having height H. The belt-like capacitor plate is wound in a spiral shape with a maximum diameter as Dmax and a constant distance between continuing rotations. The belt-like capacitor plate includes a first longitudinal edge fitted to a support part and a second longitudinal edge. The second longitudinal edge is released, and the first longitudinal edge and the second longitudinal edge are connected by an inclined edge part so that the first longitudinal edge is longer than the second longitudinal edge at an outside end part of the spiral. The inclined edge part forms with a longitudinal axis of the belt-like capacitor plate an angle α equal to or smaller than angle αmax=(45° π / 180°) .SELECTED DRAWING: Figure 1

To provide an electret device which has a long service life and in which an electrostatic property of an electret element enclosed in a sealed space can be prevented from deteriorating.SOLUTION: Provided is an electret device including a package member, a lid member, and an electret element. The lid member seals the package member to form a sealed space. The electret element is disposed in the sealed space. In the package member, at least a portion of an inner wall forming the sealed space is water-repellent.SELECTED DRAWING: Figure 2

A multilayer electronic component includes a main body including dielectric layers and first and second internal electrode layers alternately stacked in a stacking direction, and each dielectric layer is interposed between the first and second internal electrode layers. The first internal electrode layer includes a first internal electrode and a second internal electrode disposed with a first spacer interposed therebetween, and the second internal electrode layer includes a third internal electrode and a fourth internal electrode disposed with a second spacer interposed therebetween.

The utility model discloses a variable vacuum capacitor, which comprises a capacitor outer shell, two electrode ring groups accommodated in the capacitor outer shell, a positioning rod and a positioning sliding sleeve, wherein the positioning rod is fixedly connected to one electrode ring group and can drive the electrode ring group to axially move relative to the other electrode ring group; the positioning sliding sleeve is detachably installed on the capacitor outer shell in a welding mode, the positioning rod is arranged in the positioning sliding sleeve in a sliding fit mode, and the two electrode ring sets are concentrically distributed. The structural design of the detachable self-lubricating positioning sliding sleeve is adopted, and high-temperature welding is not needed, so that the positioning sliding sleeve does not generate stress and size changes, the size of an inner hole of the positioning sliding sleeve can be accurately controlled, the gap between the positioning sliding sleeve and the positioning rod can be stably controlled, and the service life of the positioning rod is prolonged. Therefore, the variable vacuum capacitor has stable capacitance value change and lower rotating torque, the capacitance value precision of the capacitor is improved, and the mechanical life of the capacitor is prolonged.

To provide a technique capable of contributing to easily obtaining desired energization capability of high-frequency power and a product life.SOLUTION: A polygonal cylindrical conductive wall part 5 which is expandable in the axial direction and has a diameter larger than that of a bellows 4 is provided on the outer peripheral side of the bellows 4 in a vacuum vessel 10. A notch 61 penetrating in the radial direction and extending in the axial direction is provided at the center in the axial direction of each corner 6 located at each ridge of the conductive wall 5. In each side wall part 7 positioned between the ridgelines of the conductive wall part 5 and extending in the axial direction, an inter-notch part 71 between a pair of notches 61 facing each other in the circumferential direction of the side wall part 7 is curved in a convex shape outward in the radial direction or curved in a convex shape inward in the radial direction. At each of the corner portions 6, only one notch 61 is formed, or a plurality of notches 61 are formed.SELECTED DRAWING: Figure 1

This utility model relates to the field of capacitor technology, specifically disclosing a capacitor heat dissipation mechanism and a vacuum capacitor. The heat dissipation mechanism includes a spiral coil and a fixed base. The spiral coil is disposed inside the capacitor body and sleeved on the outside of a bellows. The fixed base has an inlet hole and an outlet hole. The inlet end of the spiral coil is connected to the inlet hole, and the outlet end of the spiral coil is connected to the outlet hole. The fixed base is mounted on the outer shell of the capacitor body. This heat dissipation mechanism combines the advantages of efficient heat dissipation and compact structure to reduce the temperature of the bellows and maintain the stable performance of the capacitor body.

A vacuum variable capacitor includes a vacuum sealed enclosure to contain a vacuum dielectric medium, wherein the enclosure includes a first plate and a second plate, the first plate and the second plate being separated by an electrically insulating element, a fixed electrode attached inside the enclosure to the first plate and a movable electrode attached to a movable plate, wherein the movable plate is attached inside the enclosure to the second plate by at least one vacuum bellows, wherein the vacuum capacitor includes a mechanical drive system for displacing, in particular translating, the movable plate relative to the first plate so as to vary the capacitance of the vacuum capacitor, wherein the mechanical drive system includes a ball screw arranged to drive the movable plate and wherein the mechanical drive system includes outside of the vacuum sealed enclosure a limiting element limiting the maximum distance between the first plate and the movable plate and wherein the drive system includes a nut attached to the ball screw, wherein the nut includes a first shoulder configured to abut against the limiting element to limit the maximum distance between the first plate and the movable plate.

Provided is a long-life electret device preventing charge degradation of an electret element sealed in a closed space. The provided electret device includes: a package member; a lid member; and an electret element, the lid member seals the package member to thereby form a closed space, the electret element is placed in the closed space, and a hydrogen getter is included in at least part of an inside of the closed space.

This invention provides a high-voltage variable capacitor and its method of use, comprising: a sealable housing assembly with ports; an electrode assembly mounted within the cavity of the housing assembly, the capacitance value of which is adjusted by changing the effective overlap area between the electrodes; and an insulating fluid dielectric filling the cavity to immerse the electrode assembly; the fluid dielectric is a liquid dielectric. This invention also provides a method for operating the capacitor, comprising draining the original first fluid dielectric from the cavity and injecting a second fluid dielectric with a different dielectric constant. Through this structure and method, the user can replace different types of fluid dielectrics, thereby changing the overall capacitance adjustment range and voltage rating of the capacitor. The capacitor of this invention has the advantages of high voltage resistance, small size, high power carrying capacity, flexible application, and relatively low cost.