CN218004630U - Vacuum capacitor capable of quickly and accurately adjusting capacitance value - Google Patents
Vacuum capacitor capable of quickly and accurately adjusting capacitance value Download PDFInfo
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- CN218004630U CN218004630U CN202221681190.4U CN202221681190U CN218004630U CN 218004630 U CN218004630 U CN 218004630U CN 202221681190 U CN202221681190 U CN 202221681190U CN 218004630 U CN218004630 U CN 218004630U
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Abstract
The utility model discloses a can quick accurate vacuum capacitor who adjusts appearance value, include: a vacuum housing having a vacuum chamber therein, and two electrode groups coupled to each other and disposed in the vacuum chamber; an electromagnetic power device is arranged on the outer side of one end of the vacuum shell and is connected with one of the electrode groups in a transmission manner, and when the electromagnetic power device is electrified, electromagnetic force can be generated to generate linear displacement so as to pull the electrode group to move relative to the other electrode group, so that the coupling area between the two electrode groups is changed; the distance for pulling the electrode group to move is changed by regulating and controlling the magnitude of the current value input into the electromagnetic power device. This can quick accurate vacuum capacitor who adjusts appearance value adopts accurate electromagnetism power device as the power supply to adjust vacuum capacitor's appearance value, realizes the quick accurate adjustment of vacuum capacitor appearance value, satisfies user's user demand.
Description
Technical Field
The utility model relates to a vacuum capacitor technical field, in particular to can be fast accurate vacuum capacitor who adjusts appearance value.
Background
The conventional vacuum capacitor with a changeable capacitance value is adjusted in the capacitance value range by adopting a thread system, and is influenced by the thread specification, the material of a rotating part and the surface state of the rotating part, so that the mechanical life and the adjusting speed of the vacuum capacitor are limited.
As shown in fig. 1, the moving electrode group of the conventional variable vacuum capacitor is connected to a rotating screw 20 through a pull rod, the rotating screw 20 is connected to a control motor 10, the rotating screw 20 is driven to rotate by the control motor 10, the moving electrode group moves up and down along with the clockwise or counterclockwise rotation of the rotating screw 20, the coupling length between the moving electrode group and the static electrode group is changed, the coupling area between the two electrode groups is changed, and the capacitance value of the vacuum capacitor is changed accordingly, thereby realizing the adjustment of the capacitance value of the variable vacuum capacitor.
Due to the limitation of the thread standard, the pitch of the rotary screw 20 cannot be adjusted at will, and therefore the up-and-down moving distance value of the electrode group is limited. Meanwhile, due to the influence of the pressure difference between the inside and the outside of the vacuum capacitor on the rotating screw 20, the torque of the rotating screw 20 is usually greater than 0.1N · m, and the rotating speed of the rotating screw 20 cannot be increased under the condition of a certain torque of the control motor 10, so the capacity adjusting speed of the vacuum capacitor is also limited, the adjusting speed of the conventional variable vacuum capacitor is generally 600rpm, and the adjusting time of the maximum stroke is usually greater than 3 seconds.
Along with the continuous promotion of the application equipment of vacuum capacitor to the matching speed and the matching precision of impedance matcher, the user requires that the capacity value of vacuum capacitor adjusts speed more and more fast, and the capacity value adjustment precision is higher and more high, and it is obvious that traditional vacuum capacitor has can't satisfy user's user demand.
Disclosure of Invention
An object of the utility model is to provide a can be fast accurate vacuum capacitor who adjusts appearance value to the appearance value of overcoming traditional vacuum capacitor adjusts the not high and slower defect of governing speed of precision.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: a vacuum capacitor capable of quickly and accurately adjusting capacitance value comprises: a vacuum housing having a vacuum chamber therein, and two electrode groups coupled to each other and disposed in the vacuum chamber; an electromagnetic power device is arranged on the outer side of one end of the vacuum shell and is connected with one of the electrode groups in a transmission manner, and when the electromagnetic power device is electrified, electromagnetic force can be generated to generate linear displacement so as to pull the electrode group to move relative to the other electrode group, so that the coupling area between the two electrode groups is changed;
the distance for pulling the electrode group to move is changed by regulating and controlling the magnitude of the current value input into the electromagnetic power device.
As a further improvement of the present invention, the electrode group is a movable electrode group and a static electrode group, the one end of the static electrode group is fixed on the inner wall of the other end of the vacuum housing, and the movable electrode group and the other end of the static electrode group are arranged relatively.
As a further improvement of the present invention, a pull rod is fixedly connected to the movable electrode group, and one end of the pull rod is passed through one end of the vacuum casing and the electromagnetic power device.
As a further improvement, the one end of pull rod has only the position to keep off the platform around the periphery extension, works as during the outage of electromagnetism power device, the orientation has under the poor effort of outer pressure difference including the moving electrode group the trend of stationary electrode group motion makes it is in only to keep off the platform backstop in the position on the one end lateral surface of vacuum shell.
As a further improvement of the present invention, the electromagnetic power device is provided with a fixed housing, a rotor and a stator, the fixed housing is installed outside one end of the vacuum housing, the stator is installed in the fixed housing, the rotor is in clearance sliding fit with the stator, and the rotor is fixedly connected with one end of the pull rod;
the rotor is a coil assembly, and the stator is a magnetic steel assembly; or the rotor is a magnetic steel assembly, and the stator is a coil assembly.
As a further improvement, the moving electrode group deviates from one side of the static electrode group and the bellows is connected between the inner walls of one end of the vacuum shell in a sealing manner, and the bellows can follow the movement of the moving electrode group to generate elastic deformation.
As a further improvement of the utility model, the electromagnetic power device is a voice coil motor.
The utility model has the advantages that: the utility model provides a can adjust vacuum capacitor of appearance value fast accurately, adopt the appearance value that vacuum capacitor was adjusted as the power supply to accurate electromagnetic power device, current value size through regulation and control input electromagnetic power device, change the electromagnetic force between active cell and the stator, make the active cell pulling move the distance that electrode group removed and change, coupling area between two electrode groups also changes thereupon, thereby realize the quick accurate regulation of vacuum capacitor appearance value, vacuum capacitor's appearance value regulation time can reach within 50ms, appearance value regulation precision is up to 0.001pF, and adjust and can not receive the screw thread pitch restriction as traditional, can realize the optional position and adjust, satisfy user's user demand.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art vacuum capacitor adjusted by a motor in cooperation with a rotating screw;
FIG. 2 is a schematic cross-sectional view of the vacuum capacitor with the capacity value adjusted rapidly and precisely in the maximum capacity value state according to the present invention;
fig. 3 is a schematic cross-sectional view of the vacuum capacitor capable of rapidly and precisely adjusting the capacitance value of the present invention in the minimum capacitance value state.
The following description is made with reference to the accompanying drawings:
1. a vacuum enclosure; 2. a moving electrode group; 3. a static electrode group; 4. a pull rod; 401. stopping the position and blocking the platform; 5. fixing the housing; 6. a mover; 7. a stator; 8. a bellows; 9. a power source; 10. controlling the motor; 20. the screw is turned.
Detailed Description
The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.
Referring to fig. 2 and 3, the utility model provides a but vacuum capacitor of quick accurate regulation appearance value, include: a vacuum housing 1 with a vacuum chamber therein and two electrode sets. The vacuum shell 1 is composed of a ceramic tube, an upper end cover and a lower end cover which are welded at two ends of the ceramic tube in a sealing mode, so that the vacuum shell 1 is high in insulating performance, high in medium withstand voltage and capable of providing a high vacuum environment for the electrode group. The two electrode groups are mutually coupled and arranged in a vacuum cavity in the vacuum shell 1, the top of the upper end cover of the vacuum shell 1 is provided with an electromagnetic power device, the electromagnetic power device is connected with one electrode group in a transmission way, and the electromagnetic power device can generate electromagnetic force to generate linear displacement when being electrified and pull the electrode group to move relative to the other electrode group so as to change the coupling area between the two electrode groups and realize the adjustment of the capacitance value of the vacuum capacitor.
Specifically, the two electrode groups are respectively a moving electrode group 2 and a static electrode group 3, the lower end of the static electrode group 3 is fixedly connected to the inner wall of the lower end cover of the vacuum shell 1, and the static electrode group 3 is composed of a plurality of electrode rings which are nested with each other. The upper ends of the movable electrode group 2 and the static electrode group 3 are oppositely arranged, the movable electrode group 2 comprises a movable electrode disk and a movable electrode, the movable electrode is fixed on the lower side surface of the movable electrode disk and coupled with the static electrode group 3, and the movable electrode is also composed of a plurality of electrode rings which are nested with each other. The coupling part of the moving electrode group 2 and the static electrode group 3 is a charge storage unit consisting of two groups of electrode belts.
The vacuum capacitor capable of quickly and accurately adjusting the capacitance value further comprises a pull rod 4 and a corrugated pipe 8. The middle part of the rotor disc is provided with a mounting hole, the lower end of the pull rod 4 is inserted in the mounting hole and is fixed in a welding mode to realize sealing. The upper end cover of the vacuum shell 1 is positioned in the middle and extends towards the inner cavity of the vacuum shell 1 to form a sleeve, and the pull rod 4 is arranged in the sleeve in a sliding way and used for ensuring the stability during movement; and the upper end of the pull rod 4 passes through the upper end cover of the vacuum casing 1 for connection with the electromagnetic power unit. The bellows 8 is sleeved outside the pull rod 4, the lower end of the bellows 8 is welded on the upper side face of the rotor disc in a sealing mode, and the upper end of the bellows 8 is welded on the inner wall of the upper end cover of the vacuum shell 1 in a sealing mode, so that the vacuum environment in the vacuum shell 1 is guaranteed. The bellows 8 can be made of, but not limited to, stainless steel, and can elastically deform along with the up-and-down movement of the movable electrode group 2, so that the mechanical life is long.
Further, what this application electromagnetism power device adopted is current voice coil motor, can be moving magnetic voice coil motor, certainly also can be moving coil voice coil motor, specifically uses in this embodiment is moving coil voice coil motor. The electromagnetic power device is electrically connected with the power supply 9, and the controller regulates and controls the current value input into the electromagnetic power device.
The electromagnetic power device is provided with a fixed shell 5, a rotor 6 and a stator 7, wherein the fixed shell 5 is fixedly arranged outside an upper end cover of the vacuum shell 1 through a lower fixed plate of the fixed shell, and the rotor 6 and the stator 7 are both arranged inside the fixed shell 5. The stator 7 is fixedly arranged on the inner side of an upper fixing plate of the fixed shell 5; the rotor 6 is sleeved on the stator 7 and is in clearance sliding fit with the stator 7, and the upper end of the pull rod 4 is fixedly connected to the rotor 6. When the moving coil type voice coil motor is selected, the rotor 6 is a coil assembly, and the stator 7 is a magnetic steel assembly; when the moving magnet type voice coil motor is selected, the rotor 6 is a magnetic steel assembly, and the stator 7 is a coil assembly.
This application regulates and control the current value size of input electromagnetic power device through the controller, realize that coil assembly produces the change in magnetic field among the electromagnetic power device, cause the electromagnetic force between active cell 6 and the stator 7 to change, with this change active cell 6 takes place the distance of linear displacement, and make the distance that the pulling moved electrode group 2 removed change thereupon, coupling area between two electrode groups also correspondingly changes, thereby realize vacuum capacitor capacity value and adjust, electromagnetic power device has very fast response and velocity of movement, and it is high to remove the precision, make vacuum capacitor's capacity value regulation time can reach within 50 milliseconds, the capacity value regulation precision reaches up to 0.001pF, realize the quick accurate regulation of vacuum capacitor capacity value, satisfy user's user demand.
Further, an annular stopper 401 extends around the outer circumference at the upper end of the draw bar 4 exposed outside the vacuum casing 1. When the electromagnetic power device is powered off, the moving electrode group 2 has a tendency of moving towards the static electrode group 3 under the action of the pressure difference between the inside and the outside of the bellows 8, so that the stopping block 401 is stopped on the outer side surface of the upper end cover of the vacuum housing 1, the coupling length between the moving electrode group 2 and the static electrode group 3 is the longest, the coupling area between the two groups of electrode groups is the largest (as shown in fig. 2), and the capacitance value of the vacuum capacitor is the largest capacitance value. When the current value input by the electromagnetic power device is a set maximum value, a coil assembly in the electromagnetic power device generates a magnetic field, the mover 6 is acted by the magnetic field and acted by the stator 7, the mover 6 pulls the movable electrode group 2 to move upwards through the pull rod 4, the coupling length between the movable electrode group 2 and the static electrode group 3 is shortened, the coupling area of the two groups of electrode groups is reduced (as shown in fig. 3), and the capacitance value of the vacuum capacitor is a minimum capacitance value.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims (7)
1. A vacuum capacitor capable of quickly and accurately adjusting the capacitance value comprises a vacuum shell (1) internally constructed with a vacuum chamber and two electrode groups, wherein the two electrode groups are mutually coupled and arranged in the vacuum chamber; the method is characterized in that: an electromagnetic power device is arranged on the outer side of one end of the vacuum shell (1), the electromagnetic power device is connected to one of the electrode groups in a transmission manner, when the electromagnetic power device is electrified, electromagnetic force can be generated to generate linear displacement, and the electrode group is pulled to move relative to the other electrode group so as to change the coupling area between the two electrode groups;
the distance for pulling the electrode group to move is changed by regulating and controlling the magnitude of the current value input into the electromagnetic power device.
2. The vacuum capacitor capable of adjusting capacitance value rapidly and precisely as claimed in claim 1, wherein: the two electrode groups are respectively a dynamic electrode group (2) and a static electrode group (3), one end of the static electrode group (3) is fixed on the inner wall of the other end of the vacuum shell (1), and the dynamic electrode group (2) and the other end of the static electrode group (3) are oppositely arranged.
3. The vacuum capacitor capable of rapidly and precisely adjusting the capacitance value as claimed in claim 2, wherein: and a pull rod (4) is fixedly connected to the movable electrode group (2), and one end of the pull rod (4) penetrates through one end of the vacuum shell (1) to be connected with the electromagnetic power device.
4. The vacuum capacitor capable of adjusting capacitance value rapidly and precisely as claimed in claim 3, wherein: one end of the pull rod (4) extends around the periphery to form a stop table (401), and when the electromagnetic power device is powered off, the movable electrode group (2) has a trend of moving towards the static electrode group (3) under the action of the difference of internal and external pressure, so that the stop table (401) is stopped on the outer side surface of one end of the vacuum shell (1).
5. The vacuum capacitor capable of adjusting capacitance value rapidly and precisely as claimed in claim 3, wherein: the electromagnetic power device is provided with a fixed shell (5), a rotor (6) and a stator (7), the fixed shell (5) is installed on the outer side of one end of the vacuum shell (1), the stator (7) is installed in the fixed shell (5), the rotor (6) is in clearance sliding fit with the stator (7), and the rotor (6) is fixedly connected with one end of the pull rod (4);
the rotor (6) is a coil assembly, and the stator (7) is a magnetic steel assembly; or the rotor (6) is a magnetic steel assembly, and the stator (7) is a coil assembly.
6. The vacuum capacitor capable of rapidly and precisely adjusting capacitance value according to claim 2, wherein: a corrugated pipe (8) is connected between one side of the movable electrode group (2) departing from the static electrode group (3) and the inner wall of one end of the vacuum shell (1) in a sealing mode, and the corrugated pipe (8) can elastically deform along with the movement of the movable electrode group (2).
7. The vacuum capacitor capable of adjusting capacitance value rapidly and precisely as claimed in claim 1, wherein: the electromagnetic power device is a voice coil motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221681190.4U CN218004630U (en) | 2022-06-30 | 2022-06-30 | Vacuum capacitor capable of quickly and accurately adjusting capacitance value |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221681190.4U CN218004630U (en) | 2022-06-30 | 2022-06-30 | Vacuum capacitor capable of quickly and accurately adjusting capacitance value |
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| CN218004630U true CN218004630U (en) | 2022-12-09 |
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| CN202221681190.4U Active CN218004630U (en) | 2022-06-30 | 2022-06-30 | Vacuum capacitor capable of quickly and accurately adjusting capacitance value |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231500A1 (en) * | 2022-05-30 | 2023-12-07 | 昆山国力电子科技股份有限公司 | Capacitance value rapid-switching vacuum capacitor |
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2022
- 2022-06-30 CN CN202221681190.4U patent/CN218004630U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231500A1 (en) * | 2022-05-30 | 2023-12-07 | 昆山国力电子科技股份有限公司 | Capacitance value rapid-switching vacuum capacitor |
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