CN103441655A - Cylindrical frequency converter - Google Patents
Cylindrical frequency converter Download PDFInfo
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- CN103441655A CN103441655A CN2013104194961A CN201310419496A CN103441655A CN 103441655 A CN103441655 A CN 103441655A CN 2013104194961 A CN2013104194961 A CN 2013104194961A CN 201310419496 A CN201310419496 A CN 201310419496A CN 103441655 A CN103441655 A CN 103441655A
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- 239000003990 capacitor Substances 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 description 18
- 238000009434 installation Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 4
- 101150114468 TUB1 gene Proteins 0.000 description 3
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- 229910052751 metal Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000003466 welding Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
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Abstract
The invention provides a cylindrical frequency converter. The cylindrical frequency converter comprises an outer cylinder, an inner cylinder, a frequency converter body and end covers, wherein the outer cylinder can enter a well; the inner cylinder is sleeved in the outer cylinder and a well rod body can penetrate through the inner cylinder; the frequency converter body is arranged in a cavity between the inner cylinder and the outer cylinder; the end covers are hermetically connected with the inner cylinder and the outer cylinder respectively; the end covers are provided with through holes through which the well rod body can pass; the frequency converter body comprises at least two driving boards connected in series in sequence, power devices, a capacitor module and a control board; the power devices and the control board are connected with the driving boards; the driving boards and the control board are provided with I/O interfaces. The cylindrical frequency converter provided by the invention can enter the well along with the well rod body, thus reducing the use cost and also improving the use reliability; meanwhile, the frequency converter body is arranged between the outer cylinder and the inner cylinder, the driving boards are split and then the inner space of the cylindrical frequency converter is fully utilized, so that the inner structure of the cylindrical frequency converter is more compact and the size is smaller, and therefore the cylindrical frequency converter can be applied to drilling equipment.
Description
Technical Field
The invention relates to the technical field of variable frequency drive control of drilling equipment, in particular to a cylindrical frequency converter.
Background
The frequency converter is an important device in the field of frequency conversion and speed regulation, and is widely applied to traditional industries (such as textile, ceramic, machine tool processing and the like). At present, a common frequency converter mainly comprises: the frequency converter comprises a box body and a frequency converter main body positioned in the box body; the frequency converter main body mainly comprises a power device IGBT (insulated Gate Bipolar transistor), a driving plate connected with the power device, a control plate connected with the driving plate and a capacitor assembly; wherein, the drive board and the control board are both provided with I/O (input/output) interfaces. The frequency converters with different power grades have different sizes, and generally, the larger the power of the frequency converter is, the larger the volume of the frequency converter is. Usually, the casing of the frequency converter is rectangular.
In the application field of underground exploration and oil exploitation, the frequency conversion drive control of the mine equipment has wide application prospect, and the frequency converter is required to be applied to the mine equipment. In the application fields of underground exploration and oil exploitation, the cross section of a well is circular, and well rod bodies (such as drill rods, sucker rods, water pumping rods and the like which are driven by a motor to rotate or repeatedly move back and forth) of mine equipment need to extend into the well to work. For example, in the oil exploitation industry, there are certain standards for the diameters of the shaft and the shaft rod, generally the diameter of the shaft is 116mm, the diameter of the shaft rod is 64mm, the existing frequency converter box body is rectangular, and the frequency converter can only be placed above the shaft opening (on the ground outside the shaft), and then is connected to the pumping unit in the shaft through the control cable and the driving cable. However, for a deeper shaft, a longer control cable and a longer driving cable are required to be connected to a motor of the pumping unit, so that the timely response of the motor is influenced, the consumption of output power is larger, and the use cost of the frequency converter is higher; in addition, longer cables are more susceptible to damage, resulting in lower reliability of use of the frequency converter.
In summary, how to reduce the influence on the timely response of the motor to reduce the consumption of the output power and further reduce the use cost of the frequency converter is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a cylindrical frequency converter to reduce the influence on the timely response of a motor, reduce the consumption of output power and further reduce the use cost of the frequency converter.
In order to achieve the above purpose, the invention provides the following technical scheme:
a drum converter, comprising: the frequency converter comprises an outer barrel capable of entering a well, an inner barrel, a frequency converter main body and end covers, wherein the inner barrel is sleeved in the outer barrel and can be penetrated by a well rod body, the frequency converter main body is positioned in a cavity between the inner barrel and the outer barrel, and the end covers are respectively connected with the inner barrel and the outer barrel in a sealing mode; wherein,
the end cover is provided with a through hole for the shaft rod body to pass through; the frequency converter main body includes: the circuit comprises at least two driving boards, a power device, a capacitor assembly and a control board, wherein the driving boards are sequentially connected in series; wherein, the drive plate and the control panel are both provided with I/O interfaces.
Preferably, in the above cylindrical frequency converter, the drive plate extends in an axial direction of the outer cylinder or in a circumferential direction of the outer cylinder; the control plate extends along the axial direction of the outer cylinder.
Preferably, in the above cylindrical frequency converter, the drive plates are sequentially arranged along a circumferential direction of the outer cylinder.
Preferably, in the above cylindrical frequency converter, the drive plate and the control plate are both fixedly connected to an inner wall of the outer cylinder.
Preferably, in the cylindrical frequency converter, the driving plates are sequentially connected in series through cables or copper bars; the driving plate is connected with the control plate through a flexible flat cable.
Preferably, in the above cylindrical frequency converter, the number of the power devices is plural, and the power devices are provided corresponding to the driving board.
Preferably, in the cylindrical inverter, the outer cylinder is a cylinder; the inner wall of the outer barrel is provided with a plane area, and the power device is located on the plane area.
Preferably, in the above cylindrical frequency converter, the outer cylinder includes at least two hermetically connected sub-cylinders, and a butt surface of the two connected sub-cylinders is parallel to an axis of the outer cylinder.
Preferably, in the above cylindrical frequency converter, the number of the sub-cylinders is two, and the sub-cylinders are respectively a first sub-cylinder and a second sub-cylinder, the power device and the driving plate are located on the first sub-cylinder, and the control board is located on the second sub-cylinder.
Preferably, in the above cylindrical frequency converter, the capacitor assembly is disposed at an end of the cavity far away from the I/O interface, and the capacitor assembly is connected to the driving board through a copper bar.
Preferably, in the cylindrical frequency converter, an input power terminal and an output power terminal of the I/O interface are copper bars, and the input power terminal and the output power terminal are both welded to the drive plate; the control terminal of the I/O interface is an optical fiber terminal and is welded on the control board.
The cylindrical frequency converter provided by the invention is provided with the outer cylinder which can enter a well and the inner cylinder which can be penetrated by a well rod body, and the end cover is provided with the through hole which can be penetrated by the well rod body, so that the well rod body can penetrate through the whole cylindrical frequency converter, the cylindrical frequency converter is distributed around the well rod body, the space in the well can be effectively utilized, the interference of a well wall on the cylindrical frequency converter can be avoided, the cylindrical frequency converter can enter the well along with the well rod body, the distance between the cylindrical frequency converter and a motor is shortened, the lengths of a control cable and a driving cable are shortened, the influence on the timely response of the motor is reduced, the consumption of output power is reduced, and the use cost of the cylindrical frequency converter is further reduced; meanwhile, the probability that the control cable and the driving cable are damaged is reduced, and the use reliability of the cylindrical frequency converter is further improved.
Meanwhile, the cylindrical frequency converter provided by the invention has the advantages that the frequency converter main body is arranged between the outer cylinder and the inner cylinder, and at least two drive plates which are sequentially connected in series are arranged, namely the drive plates are disassembled, the internal space of the cylindrical frequency converter is fully utilized, so that the internal structure of the cylindrical frequency converter is more compact, the size is smaller, and the cylindrical frequency converter is conveniently applied to drilling equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an exploded schematic view of a drum-type frequency converter provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a frequency converter body in a cylindrical frequency converter according to an embodiment of the present invention;
fig. 3 is a transverse cross-sectional view of a drum-type frequency converter according to an embodiment of the present invention.
In the above FIGS. 1-3:
the device comprises an outer cylinder 1, a first sub-cylinder 11, a second sub-cylinder 12, a drive plate 2, an inner cylinder 3, a capacitor 4, an I/O interface 5, an end cover 6, a through hole 61, a capacitor plate 7, a control plate 8 and an IGBT 9.
Detailed Description
The embodiment of the invention provides a cylindrical frequency converter which can enter a shaft along with a shaft rod body, so that the influence on the timely response of a motor is reduced, the consumption of output power is reduced, and the use cost of the cylindrical frequency converter is further reduced.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a cylindrical frequency converter, which comprises: the device comprises an outer cylinder 1 capable of entering a well, an inner cylinder 3 which is sleeved in the outer cylinder 1 and can be penetrated by a well rod body, a frequency converter main body positioned in a cavity between the inner cylinder 3 and the outer cylinder 1, and end covers 6 which are respectively connected with the inner cylinder 3 and the outer cylinder 1 in a sealing manner; wherein, the end cover 6 is provided with a through hole 61 for the shaft rod body to pass through; the converter main part includes: the circuit comprises at least two driving plates 2, a power device 9, a capacitor assembly and a control plate 8, wherein the driving plates 2 are sequentially connected in series; wherein, drive plate 2 and control panel 8 all are provided with I/O interface 5.
It should be noted that the shaft rod body is a shaft rod body of the drilling equipment, and the shaft is an underground shaft such as an oil exploitation shaft and an underground exploration shaft. The number of the end covers 6 is two, the two end covers are respectively positioned at two ends of the outer barrel 1, and one end cover 6 is provided with a wire passing hole so that a cable can be connected with a wiring terminal of the frequency converter main body. The capacitor assembly needs to be electrically connected to the power device 9. When the end cover 6 is sleeved outside the inner cylinder 3, the through hole 61 can be used for the inner cylinder 3 to pass through, and further the shaft rod body to pass through.
The cylindrical frequency converter provided by the embodiment of the invention is provided with the outer cylinder 1 capable of entering a well and the inner cylinder 3 capable of allowing a well rod body to penetrate through, and the end cover 6 is provided with the through hole 61 through which the well rod body penetrates, so that the well rod body can penetrate through the whole cylindrical frequency converter, the cylindrical frequency converter is distributed around the well rod body, the space in the well can be effectively utilized, the interference of a well wall on the cylindrical frequency converter can be avoided, the cylindrical frequency converter can enter the well along with the well rod body, the distance between the cylindrical frequency converter and a motor is shortened, the lengths of a control cable and a driving cable are shortened, the influence on the timely response of the motor is reduced, the consumption of output power is reduced, and the use cost of the cylindrical frequency converter is further reduced; meanwhile, the probability that the control cable and the driving cable are damaged is reduced, and the use reliability of the cylindrical frequency converter is further improved.
Meanwhile, according to the cylindrical frequency converter provided by the embodiment of the invention, the frequency converter main body is arranged between the outer cylinder 1 and the inner cylinder 3, and at least two driving plates 2 which are sequentially connected in series are arranged at the same time, namely the driving plates 2 are disassembled, so that the internal space of the cylindrical frequency converter is fully utilized, the internal structure of the cylindrical frequency converter is more compact, the size is smaller, and the cylindrical frequency converter is conveniently applied to drilling equipment.
The installation method of the cylindrical frequency converter provided by the embodiment of the invention comprises the following steps: the cylindrical frequency converter is sleeved on the outer side of the shaft rod body and is fixedly connected with the shaft rod body. The cylindrical frequency converter is preferentially selected to be positioned above the motor driving equipment and electrically connected with a motor of the motor driving equipment, and the motor driving equipment is fixed on a shaft rod body. Realize cylindric converter and well body of rod fixed connection, can have multiple mode, for example through the cylindric converter through realize with the indirect fixed connection of well body of rod with the butt of motor drive equipment, or directly fix the cylindric converter on the well body of rod, cylindric converter and well body of rod accessible bolt, buckle or bind rope fixed connection. The embodiment of the present invention is not particularly limited thereto. It should be noted that the motor driving device is a drill bit device, an oil pumping unit or a submersible pump, etc. When the motor driving equipment is a submersible pump, the shaft rod body mainly plays a supporting role, the cylindrical frequency converter and the submersible pump reciprocate up and down along with the shaft rod body, and when the shaft rod body moves down, the cylindrical frequency converter drives the submersible pump to absorb oil; when the shaft rod body lifts the shaft rod body and the shaft rod body, the rotating speed of the motor is controlled without absorbing oil so as to play a role in saving energy.
Preferably, in the cylindrical frequency converter provided in the above embodiment, the drive plate 2 extends in the axial direction of the outer cylinder 1, or extends in the circumferential direction of the outer cylinder 1; the control plate 8 extends in the axial direction of the outer cylinder 1. To facilitate the mounting of the power device 9, the drive plate 2 is preferably selected to extend in the axial direction of the outer sleeve 1. Therefore, the inner space of the cylindrical frequency converter can be fully utilized, the inner structure of the cylindrical frequency converter is more compact, and the reduction of the volume of the cylindrical frequency converter is facilitated.
Further, in the cylindrical frequency converter provided in the above embodiment, the driving plates 2 are sequentially distributed along the circumferential direction of the outer cylinder 1. Therefore, the annular cavity between the inner cylinder 2 and the outer cylinder 1 can be fully utilized, the compactness of the internal structure is enhanced, and the volume of the cylindrical frequency converter can be further reduced. Of course, the driving plates 2 may be disposed along the axial direction of the outer cylinder 1 in sequence, and the embodiment of the present invention is not particularly limited thereto.
In order to enhance reliability, the above-described embodiment provides a cylindrical frequency converter in which the drive plate 2 and the control plate 8 are fixedly connected to the inner wall of the outer cylindrical housing 1. Like this, can guarantee the steadiness of drive plate 2 and control panel 8, be favorable to strengthening the heat dissipation of drive plate 2 and control panel 8 simultaneously, and then improve the heat dispersion of this cylindric converter. Preferably, the driving plate 2 is fixedly connected with the inner wall of the outer cylinder 1 through a screw or a buckle; the control panel 8 is fixedly connected with the inner wall of the outer cylinder 1 through screws or buckles. Of course, the driving plate 2 and the control plate 8 may be fixed to the outer cylinder 1 in other ways, which is not specifically limited in the embodiment of the present invention.
In the cylindrical frequency converter provided by the embodiment, at least two driving plates 2 are provided, and the driving plates 2 are preferably selected to be sequentially connected in series through cables or copper bars. The specific number of drive plates 2 is set according to the power class of the drum-shaped frequency converter, when the power class is larger, the number of drive plates 2 is increased, and when the power class is smaller, the number of drive plates 2 is decreased.
Preferably, in the cylindrical frequency converter provided in the above embodiment, the driving plate 2 is connected to the control plate 8 through a flexible flat cable.
In order to enable the drum frequency converter to enter the hoistway, it is necessary to reduce the cross-sectional area of the drum frequency converter as much as possible. In the cylindrical frequency converter provided by the above embodiment, the power device 9 is generally divided into two types, one type is a single-tube IGBT, and the other type is an IGBT module, the former type has a small volume, and the latter type has a large volume and a large thickness. In order to facilitate the installation of the power device 9 and reduce the cross-sectional area of the cylindrical frequency converter, the power device 9 is preferably selected to be a single-tube IGBT. The single tube IGBT has small volume, can effectively utilize the annular inner space of the cylindrical frequency converter, has compact structure, is particularly suitable for placing a plurality of single tube IGBTs along the axial direction and can be distributed along the annular direction simultaneously because the cylindrical frequency converter provided by the invention has longer axial length, meets the design requirements of frequency converters with various power sections, and reasonably utilizes the annular limited space in the cylindrical frequency converter. The specific number of the single-tube IGBTs needs to be set according to the power grade of the cylindrical frequency converter, when the power grade is high, the number of the single-tube IGBTs is increased, and when the power grade is low, the number of the single-tube IGBTs is reduced.
In order to make reasonable use of the internal space of the drum-type inverter, the above-described embodiment provides a drum-type inverter in which the number of power devices 9 is plural, and the power devices 9 are provided in correspondence with the drive board 2. Therefore, the annular inner space of the cylindrical frequency converter can be effectively utilized, the size of the cylindrical frequency converter is reduced, and the cylindrical frequency converter is applied to drilling equipment conveniently. It should be noted that the specific number of the power devices 9 needs to be set according to the power level of the drum-shaped frequency converter, when the power level is high, the number of the power devices 9 is increased, and when the power level is low, the number of the power devices 9 is decreased.
In the cylindrical frequency converter provided in the above embodiment, the outer cylinder 1 may be a square cylinder or a cylinder. In order to facilitate the cylindrical frequency converter to enter the shaft, the outer cylinder 1 is preferably selected to be a cylinder. When a single-tube IGBT is selected, as the welding position of the single-tube IGBT is a plane, in order to realize the welding of the single-tube IGBT, the inner wall of the outer barrel 1 is preferably selected to be provided with a plane area, and the power device 9 is arranged on the plane area. Meanwhile, the control board 8 and the drive board 2 are also located in the planar area. In the above cylindrical frequency converter, the inner cylinder 3 may be a square cylinder or a cylinder, and the inner cylinder 3 and the outer cylinder 1 may be both cylinders, or one of them may be a cylinder, and the other may be a square cylinder, or both may be square cylinders.
In order to facilitate the installation of the frequency converter main body, the above-mentioned embodiment provides a cylindrical frequency converter, wherein the outer cylinder 1 comprises at least two hermetically connected sub-cylinders, and the butt joint surface of the two connected sub-cylinders is parallel to the axis of the outer cylinder 1. Thus, the frequency converter main body can be firstly installed on each split cylinder, and then the outer cylinder 1 is formed on the butt-joint split cylinder, so that the installation of the frequency converter main body is convenient.
Preferably, in the cylindrical frequency converter provided in the above embodiment, the number of the sub-cylinders is two, and the sub-cylinders are respectively a first sub-cylinder 11 and a second sub-cylinder 12, the power device 9 and the driving plate 2 are located on the first sub-cylinder 11, and the control board 8 is located on the second sub-cylinder 12. Therefore, the installation of the cylindrical frequency converter is convenient, and the installation efficiency of the cylindrical frequency converter is also convenient to improve. Preferably, the first and second split barrels 11 and 12 are symmetrical about a center line of the outer barrel 1. When the outer cylinder 1 is cylindrical, the first sub-cylinder 11 and the second sub-cylinder 12 are each semi-cylindrical. Of course, the outer cylinder 1 may also be divided into two or more sub-cylinders with different sizes according to the distribution of the frequency converter main body, or the outer cylinder 1 may be divided into a plurality of sub-cylinders with the same size, which is not specifically limited in the embodiment of the present invention.
In order to facilitate the use of the cylindrical frequency converter, in the cylindrical frequency converter provided in the above embodiment, the capacitor assembly is disposed at one end of the cavity far from the I/O interface 5, and the capacitor assembly is connected to the driving board 2 through the copper bar. In this way, the capacitor assembly is indirectly electrically connected with the power device 9 through the driving board 2, which facilitates the installation of the capacitor assembly.
In order to facilitate the application of the frequency converter to drilling equipment, in the cylindrical frequency converter provided by the embodiment, an input power terminal and an output power terminal of the I/O interface 5 are copper bars, and the input power terminal and the output power terminal are both welded on the drive plate 2; the control terminal of the I/O interface 5 is an optical fiber terminal, and is welded to the control board 8. The I/O interface 5 is also provided with a wiring terminal for connecting with a driving motor, and the light terminal is used for outputting a control signal to an external motor.
In the cylindrical frequency converter provided by the above embodiment, the I/O interface 5 is selected to be located at one end of the driving plate 2, the capacitor assembly is located at the other end of the driving plate 2, and the end cover 6 with the threading hole and the I/O interface 5 are located at the same end of the outer cylinder 1. The capacitor assembly comprises a capacitor plate 7 and a capacitor 4 arranged on the capacitor plate 7, the capacitor 4 is welded on the capacitor plate 7, and the capacitor plate 7 is clamped with the inner wall of the outer barrel 1; the capacitor plate 7 is connected with the driving plate 2 through a copper bar; the control board 8 is weak current, and the selective control board 8 is connected with the drive board 2 through a flexible flat cable.
In view of the high temperature environment caused by underground heat, the cylindrical frequency converter is required to have better heat dissipation performance. Preferably, in the cylindrical frequency converter provided in the above embodiment, the outer wall of the outer cylinder 1 is provided with a heat dissipation structure. The heat dissipation structure may be distributed on the entire outer wall of the outer tub 1, or may be distributed on a part of the outer wall of the outer tub 1, and is determined according to the actually required heat dissipation performance. When the latter is selected, it is preferable that a heat dissipation structure is provided on the outer wall of the outer tub 1 at a position corresponding to the power device 9. Since the power device 9 is the main heat generating device. The heat dissipation structure can be a heat dissipation groove or a heat dissipation texture, namely the heat dissipation performance of the outer cylinder 1 is improved by increasing the outer surface area of the outer cylinder 1, and further the heat dissipation performance of the whole cylindrical frequency converter is improved. In order to maximize the heat dissipation performance, the heat dissipation structure is preferably a heat dissipation groove. Specifically, the heat dissipation groove can be a strip-shaped groove and extends along the axial direction of the outer cylinder 1; the heat dissipation groove can also be an annular groove and extends along the circumferential direction of the outer barrel 1.
In order to further optimize the technical scheme, in the cylindrical frequency converter provided by the embodiment, the outer cylinder 1 and the inner cylinder 3 are both metal shells, and the end cover 6 is a metal end cover, so that the heat dissipation performance of the outer cylinder 1, the inner cylinder 3 and the end cover 6 is improved, and further the heat dissipation performance of the whole cylindrical frequency converter is further improved. Preferably, the outer cylinder 1, the inner cylinder 3 and the end cover 6 are made of metal having high thermal conductivity. Specifically, the outer cylinder 1 and the inner cylinder 3 are both cast copper shells, and the end cover 6 is a cast copper end cover. In order to reduce the cost, the outer cylinder 1 and the inner cylinder 3 are preferably die-cast cylinders, and the end cover 6 is preferably a die-cast end cover.
In order to facilitate the entry of the tubular frequency converter into the hoistway, in the tubular frequency converter provided in the above embodiment, it is preferable that the outer cylinder 1 and the inner cylinder 3 are equal-diameter cylinders. In order to facilitate the cylindrical frequency converter to enter the well along with the well rod body, the inner diameter of the inner cylinder 3 is preferably 62-72mm, and the outer diameter of the outer cylinder 1 is preferably 107-117 mm. Of course, for different shafts and shaft rod bodies, the outer cylinder 1 and the inner cylinder 3 can also have other sizes, and in the practical application process, the sizes are set according to the specific sizes of the shafts and the shaft rod bodies.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A cylindrical frequency converter, comprising: the device comprises an outer cylinder (1) capable of entering a well, an inner cylinder (3) which is sleeved in the outer cylinder (1) in an inner mode and can be penetrated by a well rod body, a frequency converter main body which is positioned in a cavity between the inner cylinder (3) and the outer cylinder (1), and end covers (6) which are connected with the inner cylinder (3) and the outer cylinder (1) in a sealing mode respectively; wherein,
the end cover (6) is provided with a through hole (61) for the shaft rod body to pass through; the frequency converter main body includes: the circuit comprises at least two driving boards (2) which are sequentially connected in series, a power device (9) connected with the driving boards (2), a capacitor assembly and a control board (8) connected with the driving boards (2); wherein the drive board (2) and the control board (8) are both provided with I/O interfaces (5).
2. A cylindrical frequency converter according to claim 1, characterized in that the drive plate (2) extends in the axial direction of the outer shaft (1) or in the circumferential direction of the outer shaft (1); the control plate (8) extends along the axial direction of the outer cylinder (1).
3. A cylindrical frequency converter according to claim 2, characterized in that the drive plates (2) are arranged distributed in turn in the circumferential direction of the outer drum (1).
4. Cylindrical frequency converter according to claim 1, characterized in that the drive plate (2) and the control plate (8) are both fixedly connected to the inner wall of the outer shaft (1).
5. The cylindrical frequency converter according to claim 1, characterized in that the driving plates (2) are connected in series in sequence by means of cables or copper bars; the driving plate (2) is connected with the control plate (8) through a flexible flat cable.
6. The drum frequency converter according to claim 1, characterized in that the number of the power devices (9) is plural, and the power devices (9) are provided in correspondence with the driving board (2).
7. The cylindrical frequency converter according to claim 1, characterized in that the outer cylinder (1) is a cylinder; the inner wall of the outer cylinder (1) is provided with a plane area, and the power device (9) is arranged on the plane area.
8. A cylindrical frequency converter according to claim 1, characterized in that the outer cylinder (1) comprises at least two sealingly connected sub-cylinders, the abutment surfaces of the two connected sub-cylinders being parallel to the axis of the outer cylinder (1).
9. The drum frequency converter according to claim 8, characterized in that the number of said partial drums is two, respectively a first partial drum (11) and a second partial drum (12), said power device (9) and said driving plate (2) being located on said first partial drum (11), said control board (8) being located on said second partial drum (12).
10. The cylindrical frequency converter according to claim 1, wherein the capacitor assembly is arranged at an end of the cavity remote from the I/O interface (5), the capacitor assembly being connected to the drive plate (2) by means of a copper bar.
11. The cylindrical frequency converter according to claim 1, wherein the input power terminal and the output power terminal of the I/O interface (5) are copper bars, and the input power terminal and the output power terminal are both welded on the driving plate (2); the control terminal of the I/O interface (5) is an optical fiber terminal, and the control terminal is welded on the control board (8).
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| CN201310419496.1A CN103441655B (en) | 2013-09-13 | 2013-09-13 | A kind of cylindrical frequency converter |
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| CN201310419496.1A CN103441655B (en) | 2013-09-13 | 2013-09-13 | A kind of cylindrical frequency converter |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571067A1 (en) * | 1992-04-21 | 1993-11-24 | Wisconsin Alumni Research Foundation | Forward converter with two active switches and unity power factor capability |
| CN202156532U (en) * | 2011-05-28 | 2012-03-07 | 中国船舶重工集团公司第七一二研究所 | High-power density underwater electric propulsion control device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571067A1 (en) * | 1992-04-21 | 1993-11-24 | Wisconsin Alumni Research Foundation | Forward converter with two active switches and unity power factor capability |
| CN202156532U (en) * | 2011-05-28 | 2012-03-07 | 中国船舶重工集团公司第七一二研究所 | High-power density underwater electric propulsion control device |
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