53results about "Mechanically variable capacitor details" patented technology

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal. A pressure interrupter cover assembly is sealingly secured to the open end of case for the elements and has a deformable cover with a centrally mounted common cover terminal and a plurality of section cover terminals mounted at spaced apart locations. A conductor frangibly connects the common element terminal of the capacitor section to the common cover terminal and conductors respectively frangibly connect the capacitor section terminals to the section cover terminals. Deformation of the cover caused by failure of the capacitor element breaks at least some of the frangible connections sufficient to disconnect the capacitive element from an electric circuit in which it is connected. A cover insulation barrier mounted on the deformable cover, has a barrier cup substantially surrounding the common cover terminal and a plurality of barrier fins each extending radially outwardly from the barrier cup, and deployed between adjacent section cover terminals.

The invention relates to the technical field of capacitors, and discloses a fine-tuning vacuum capacitor. The fine tuning vacuum capacitor comprises a vacuum chamber, an electrode assembly and an adjusting assembly, and a vacuum cavity is arranged in the vacuum chamber; the electrode assembly is arranged in the vacuum cavity and comprises a first electrode ring group and a second electrode ring group which are in coupled connection; the adjusting assembly comprises an adjusting rod and an adjusting nut, the adjusting rod comprises a connecting section, a penetrating section and an adjusting section which are sequentially arranged, the connecting section is connected with the first electrode ring set or the second electrode ring set, the penetrating section penetrates through the vacuum cavity, the adjusting section extends out of the vacuum cavity and is in threaded connection with the adjusting nut, and the adjusting nut is rotationally arranged on the outer wall of the vacuum cavity. And the coupling length of the first electrode ring group and the second electrode ring group can be changed by screwing the adjusting nut. According to the fine-tuning vacuum capacitor, the capacitance value adjusting operation is simple and efficient, and the capacitance value adjusting process is more stable.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal. A pressure interrupter cover assembly is sealingly secured to the open end of case for the elements and has a deformable cover with a centrally mounted common cover terminal and a plurality of section cover terminals mounted at spaced apart locations. A conductor frangibly connects the common element terminal of the capacitor section to the common cover terminal and conductors respectively frangibly connect the capacitor section terminals to the section cover terminals. Deformation of the cover caused by failure of the capacitor element breaks at least some of the frangible connections sufficient to disconnect the capacitive element from an electric circuit in which it is connected. A cover insulation barrier mounted on the deformable cover, has a barrier cup substantially surrounding the common cover terminal and a plurality of barrier fins each extending radially outwardly from the barrier cup, and deployed between adjacent section cover terminals.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal. A pressure interrupter cover assembly is sealingly secured to the open end of case for the elements and has a deformable cover with a centrally mounted common cover terminal and a plurality of section cover terminals mounted at spaced apart locations. A conductor frangibly connects the common element terminal of the capacitor section to the common cover terminal and conductors respectively frangibly connect the capacitor section terminals to the section cover terminals. Deformation of the cover caused by failure of the capacitor element breaks at least some of the frangible connections sufficient to disconnect the capacitive element from an electric circuit in which it is connected. A cover insulation barrier mounted on the deformable cover, has a barrier cup substantially surrounding the common cover terminal and a plurality of barrier fins each extending radially outwardly from the barrier cup, and deployed between adjacent section cover terminals.

A capacitor provides a plurality of selectable capacitance values, by selective connection of six capacitor sections of a capacitive element each having a capacitance value. The capacitor sections are provided in a plurality of wound cylindrical capacitive elements. Two vertically stacked wound cylindrical capacitance elements may each provide three capacitor sections. There may be six separately wound cylindrical capacitive elements each providing a capacitor section. The capacitor sections have a common element terminal.

A capacitance value fast-placing vacuum capacitor includes: a housing, a first electrode group and a second electrode group. A vacuum chamber is provided in the housing. The first electrode group and the second electrode group are mutually coupled and accommodated in the vacuum chamber. An electromagnetic drive mechanism is mounted on the outer side of one end of the housing. The electromagnetic drive mechanism is capable of driving the first electrode group to shift relative to the second electrode group, the vacuum capacitor is switched between two capacitance value states. In the capacitance value rapid-switching vacuum capacitor, the electromagnetic drive mechanism is configured for rapidly adjusting and switching capacitance values of the vacuum capacitor, the capacitance value switching time of the vacuum capacitor is within one hundred milliseconds, thus meeting the requirement of an application device of the vacuum capacitor for rapid matching of an impedance matcher.

The utility model discloses a connecting structure of a variable capacitor, which comprises a mounting bracket, a bearing and a joint, and is characterized in that the mounting bracket adopts an integrated structure and is used for being fixedly connected between a driving motor of the variable capacitor and an outer shell; the bearing is embedded in the mounting bracket and is used for bearing the screw rod of the variable capacitor; and the joint is arranged in the mounting bracket and is used for fixedly connecting the output shaft of the driving motor with the screw rod. The connecting structure of the variable capacitor is simple and reasonable, the coaxiality between the output shaft of the driving motor and the screw rod is effectively improved, and the capacitance value control precision of the capacitor is improved; the volume and the manufacturing cost of the capacitor and the impedance matcher are greatly reduced; and the user requirements are met.

The invention discloses a real-time load impedance detection and rapid matching method, and the method comprises the steps: firstly, connecting a voltage amplitude and phase detection module and a capacitance adjustment module to an L-type impedance matching network, and enabling the voltage amplitude and phase detection module to be used for measuring the voltages of different positions of the L-type impedance matching network; the capacitance adjusting module is used for adjusting the capacitance value of an adjustable capacitor in the L-shaped impedance matching network; the impedance value of the load is calculated according to the real-time detection value of the voltage amplitude and phase detection module, and then the input impedance value and the voltage reflection coefficient of the input end are calculated in sequence; and finally, comparing the voltage reflection coefficient of the input end with a set threshold value, calculating a capacitance value required by an adjustable capacitor in the L-shaped impedance matching network and adjusting the adjustable capacitor when the voltage reflection coefficient of the input end is greater than the threshold value, otherwise, not adjusting the adjustable capacitor. According to the invention, the impedance matching network is rapidly adjusted according to the load impedance value, the matching of the load impedance is realized, and the loss of reflection power is reduced.

The utility model discloses a variable vacuum capacitor, which comprises a shell, a moving electrode group movably arranged in the shell, a pull rod fixedly connected with the moving electrode group, a transmission mechanism in transmission connection with the pull rod, and a guide sleeve fixedly arranged on the shell, the transmission mechanism is used for driving the movable electrode group to do linear reciprocating motion through the pull rod under the driving of an external power device; the pull rod is coaxially inserted into the guide sleeve, a first ball set is arranged between the pull rod and the guide sleeve in the axial direction, and the first ball set makes rolling contact with the pull rod and the guide sleeve. According to the utility model, the friction between the pull rod and the guide sleeve is changed from sliding friction to rolling friction, so that the fit clearance and the contact area between the pull rod and the guide sleeve are reduced, thereby reducing the rotation torque and capacitance value repeatability deviation of the variable vacuum capacitor, improving the capacitance value adjusting speed and precision, and prolonging the service life of the variable vacuum capacitor. The purpose of rapidly and accurately adjusting the capacitance value of the variable vacuum capacitor is achieved.

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.

The utility model relates to the technical field of electromagnetic induction heating devices, and provides a capacitor structure for electromagnetic induction heating, which comprises a storage box, a plurality of connecting columns and a switching mechanism, and is characterized in that two capacitors with different frequencies are arranged in the storage box; the multiple connecting columns are fixed to the storage box in a penetrating mode. The switching mechanism comprises a first guide piece, a second guide piece and a switching piece. The first guide piece and the second guide piece are electrically connected with the two connecting columns connected with one pin of the capacitor respectively. The switching sheet is selectively and electrically connected with the first guide sheet and the second guide sheet. According to the utility model, the plurality of connecting columns, the first guide sheet, the second guide sheet and the switching sheet are arranged, and the switching sheet is selectively conducted with the first guide sheet and the second guide sheet, so that capacitors with different frequencies can be respectively connected to the electromagnetic induction heating circuit through the switching sheet, thereby reducing the operation and maintenance cost of the device and improving the switching efficiency of the capacitors.

The variable capacitor includes a holding portion, a first electrode, and a second electrode. The holding unit is configured so as to be able to hold an ionic liquid. At least one first electrode is provided in the holding portion and is configured so as to apply a direct-current voltage of either positive or negative. At least two second electrodes are provided in a portion where an electric double layer is formed in the ionic liquid of the holding portion when a DC voltage is applied to the first electrode, and are configured so as to be able to be energized with high-frequency power via the holding portion.

The present invention relates to the field of sensor technology and discloses a centrally perforated annular ceramic capacitor, wherein the annular capacitor is formed by fusing and sintering a ceramic base and a ceramic reaction membrane, and wherein the axes of the ceramic base and the ceramic reaction membrane are each provided with through holes to provide a mounting channel for the circuit elements to be assembled, so that the annular capacitor can be more conveniently integrated into the complex circuit of the temperature-pressure sensor in order to simplify the overall structure of the temperature-pressure sensor, including the circuit and sealing structure, in this way giving the temperature-pressure sensor a structure of automated assembly in order to reduce manufacturing and assembly costs;In comparison to the disc-shaped ceramic capacitor without a through-hole in the middle, the toroidal capacitor with the arrangement of the first ring circuit and the second ring circuit has a higher initial value and a greater amount of change, so that the toroidal capacitor has a wider measuring range and a finer pressure sensing gradation to improve the accuracy of pressure detection.

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.

Described embodiments include a microelectromechanical system (MEMS) array comprising a first MEMS device that includes a first movable electrostatic plate elastically connected to a first structure, the first movable electrostatic plate having a first mass, a first fixed electrostatic plate, and a first drive circuit having a first drive output coupled to the first fixed electrostatic plate. There is a second MEMS device that includes a second movable electrostatic plate elastically connected to a second structure, the second movable electrostatic plate having a second mass that is different than the first mass, a second fixed electrostatic plate, and a second drive circuit having a second drive output coupled to the second fixed electrostatic plate.

The present invention discloses a real-time load impedance detection and fast matching method. First, a voltage amplitude and phase detection module and a capacitance adjustment module are connected to an L-type impedance matching network. The voltage amplitude and phase detection module is used to measure the voltages at different positions of the L-type impedance matching network, and the capacitance adjustment module is used to adjust the capacitance value of the adjustable capacitor in the L-type impedance matching network. Then, the impedance value of the load is calculated from the real-time detection values of the voltage amplitude and phase detection module, and then the input impedance value and voltage reflection coefficient at the input end are calculated in sequence. Finally, the voltage reflection coefficient at the input end is compared with a set threshold. When it is greater than the threshold, the capacitance value required for the adjustable capacitor in the L-type impedance matching network is calculated and the adjustable capacitor is adjusted; otherwise, no adjustment is made. The present invention quickly adjusts the impedance matching network according to the load impedance value, realizes the matching of the load impedance, and reduces the loss of reflected power.

The invention discloses a high-precision fixed-capacitance vacuum capacitor which comprises a shell, two electrode discs and two electrode sets, the two electrode discs are fixedly connected to the two ends of the shell respectively and define a vacuum cavity, and the two electrode sets are installed on the two electrode discs respectively and contained in the vacuum cavity in a mutually coupled mode; at least one electrode set comprises a fine-tuning electrode ring, at least one electrode disc is provided with an adjusting mechanism, and the adjusting mechanism is connected to the fine-tuning electrode ring and can adjust the axial position of the fine-tuning electrode ring in the vacuum cavity so as to change the coupling length of the fine-tuning electrode ring and the other electrode set. According to the invention, the capacitance value of the vacuum capacitor can be finely adjusted, the purpose of accurately adjusting the capacitance value of the vacuum capacitor is achieved, the overall height of the vacuum capacitor is not changed, the consistency of the product size is ensured, the influence on the installation of a user is avoided, and the operation difficulty and complexity are reduced at the same time.

The invention describes a centrally perforated ring-shaped ceramic capacitor belonging to the technical field of sensors. It is formed by the combined sintering of a ceramic base (1) and a ceramic reaction membrane (2). A hole (3) is provided in the axis of the ceramic base (1) and the ceramic reaction membrane (2) to provide an assembly passage for the circuit components to be assembled, allowing the ring-shaped capacitor to be more easily integrated into the complex circuit of the temperature and pressure sensor. This simplifies its overall circuit and sealing structure and enables automated assembly, reducing production costs. Compared to a discoidal ceramic capacitor without a central hole, its first and second ring circuits (11) and (21) offer a higher initial value and a wider variation, resulting in a broader measurement range, finer pressure detection gradation, and improved measurement accuracy.(Figure for the abbreviation: Fig.1).

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.

A ring-shaped ceramic capacitor with a central hole is provided. [Solution] An annular capacitor is formed by sintering a ceramic base and a ceramic reaction diaphragm together. Through holes are provided in the axial centers of both the ceramic base and the ceramic reaction diaphragm, providing assembly passages to the circuit elements to be combined. This facilitates the integration of the annular capacitor into the complex circuit of the temperature-pressure sensor. By simplifying the overall structure of the temperature-pressure sensor to include only the circuit and sealing structure, the temperature-pressure sensor is equipped with an automatically assembled structure, reducing production and assembly costs. The first and second annular circuits designed for the annular capacitor have higher initial values ​​and a wider range of change compared to a disc ceramic capacitor without a through hole in the center. This allows the annular capacitor to have a wider measurement range and finer pressure sensing grading, thereby improving the accuracy of pressure measurement.

The application provides a tunable capacitor, comprising a cylinder, a high-voltage electrode, a low-voltage electrode, a tunable electrode and a plurality of shielding mechanisms; the high-voltage electrode and the low-voltage electrode are partially arranged in the cylinder, and the high-voltage electrode and the low-voltage electrode are partially arranged outside the cylinder; the part of the high-voltage electrode arranged in the cylinder and the part of the low-voltage electrode arranged in the cylinder are alternately arranged along the height direction of the cylinder; each shielding mechanism is arranged in the cylinder, and each shielding electrode is arranged between adjacent high-voltage electrodes and low-voltage electrodes; the tunable electrode is arranged in the cylinder and is used for adjusting the distance between the high-voltage electrode and the low-voltage electrode to adjust the capacitance. In the application, the shielding mechanism can block the leakage current flow path between the high-voltage electrode and the low-voltage electrode, reduce the equivalent resistance between the high-voltage electrode and the low-voltage electrode, reduce the dielectric loss of the capacitor, the tunable electrode can smoothly adjust the capacitance of the capacitor, and the difference between the capacitance of the capacitor and the rated capacitance is reduced.

The application discloses a vacuum capacitor, which comprises an insulating shell, a first electrode group and a second electrode group, the first electrode group and the second electrode group are jointly contained in a vacuum chamber inside the insulating shell and can be coupled with each other through an electric field formed therebetween; a protective cover is arranged between the insulating shell and the first electrode group and / or the second electrode group, the protective cover is used for blocking impurities released from the first electrode group and / or the second electrode group to prevent the impurities from being deposited on the inner wall of the insulating shell; the protective cover is provided with an annular part and a flange part, an air-adsorbing element is fixed on the protective cover, the air-adsorbing element is made of a high-temperature sintering of a multi-element alloy powder on a metal base strip and is annular, and the air-adsorbing element is wrapped on the outer wall and / or the inner wall of the annular part. The application is provided with the protective cover, and the air-adsorbing element is wrapped on the annular part of the protective cover, so that the insulation resistance and the vacuum degree are greatly improved, and the service life of the vacuum capacitor is improved.

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 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.

A variable capacitor includes a holder, at least one first electrode, and at least two second electrodes. The holder holds an ionic liquid, the at least one first electrode is provided in the holder, and receives either a positive or negative direct-current voltage and the at least two second electrodes are provided on portions of the holder where electric double layers in the ionic liquid are formed when the direct-current voltage is applied to the first electrode, and the at least two second electrodes supply a radio-frequency power via the holder.

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.