CN215072221U - Variable-frequency driving system for well repairing vehicle - Google Patents
Variable-frequency driving system for well repairing vehicle Download PDFInfo
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- CN215072221U CN215072221U CN202120973629.XU CN202120973629U CN215072221U CN 215072221 U CN215072221 U CN 215072221U CN 202120973629 U CN202120973629 U CN 202120973629U CN 215072221 U CN215072221 U CN 215072221U
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Abstract
The utility model relates to a frequency conversion actuating system for workover rig, include: the output end of the power supply unit is connected with the power supply input end of the combined driving unit; the combined driving unit comprises a plurality of frequency conversion branches connected in parallel, each frequency conversion branch comprises a frequency converter, each frequency converter is provided with a corresponding output interface, and the output interfaces are used for connecting corresponding external electric equipment; the combined driving unit is arranged in a variable-frequency driving system cabinet. The utility model discloses a frequency conversion actuating system for well workover car has set up a plurality of frequency conversion branch roads, can realize that a well workover car just can satisfy the drive demand of all consumer in the well site, and it is loose to have solved current well site frequency conversion actuating system and distribute, overhauls the problem of maintaining the difficulty.
Description
Technical Field
The utility model relates to an oil field engineering field generally. More specifically, the utility model relates to a frequency conversion actuating system for workover rig.
Background
Currently, more and more special work vehicles are used in oil and gas production, such as well workover rigs. The well repairing vehicle is the most basic and main power source in well repairing and downhole operation construction. The well workover rig is as the power supply at the well site, in order to deal with different demands, generally need to set up the consumer such as frequency conversion drive system to drive different motors or pumps. However, the existing workover rig is only equipped with a small number of general variable frequency driving systems, for example, variable frequency driving systems for driving a traveling crane motor and a winch motor on the workover rig, and variable frequency driving systems for some special operation electric equipment are generally configured in well sites, for example, variable frequency driving systems for a main oil pump, a blowout preventer and the like in the well sites. This results in the need to debug these variable frequency drive systems on site each time the job is performed, and routine maintenance also requires personnel to go to the site.
SUMMERY OF THE UTILITY MODEL
The utility model provides a frequency conversion actuating system for well workover car to solve present frequency conversion actuating system that is used for oil gas production equipment partly and install in the well site, partly install on the well workover car for the well workover car can not compromise all well site productions, and the staff need go on overhauing the problem of maintaining to the scene.
In order to solve the above problem, the utility model provides a frequency conversion driving system for well workover car, include: the output end of the power supply unit is connected with the power supply input end of the combined driving unit; the combined driving unit comprises a plurality of frequency conversion branches connected in parallel, each frequency conversion branch comprises a frequency converter, each frequency converter is provided with a corresponding output interface, and the output interfaces are used for connecting corresponding external electric equipment; the combined driving unit is arranged in a variable-frequency driving system cabinet.
In one embodiment, the power supply unit is powered by a battery pack.
In one embodiment, the combined drive unit further comprises an auxiliary power supply branch, and the auxiliary power supply branch comprises an auxiliary circuit breaker, an inverter and a transformer which are connected in sequence.
In one embodiment, the frequency conversion branches comprise a main frequency conversion branch and at least one auxiliary frequency conversion branch, a main frequency converter is connected to the main frequency conversion branch, and an output interface of the main frequency converter is used for connecting external main electrical equipment; and the auxiliary frequency conversion branch is connected with an auxiliary frequency converter, and an output interface of the auxiliary frequency converter is used for connecting external auxiliary electric equipment.
In one embodiment, a dual power transfer switch is further disposed on the main frequency conversion branch, and the main frequency converter is connected with two external main electric devices through the dual power transfer switch.
In one embodiment, the main frequency conversion branch is further provided with a plurality of cascaded dual-power transfer switches, and the main frequency converter is connected with at least two external main electrical devices through the cascaded dual-power transfer switches.
In one embodiment, the combined driving unit further comprises a control unit, the control unit comprises a signal acquisition module, a 485 communication module and a processor, and the signal acquisition module is respectively connected with the main frequency converter and the auxiliary frequency converter and is used for acquiring the operation state and the fault information of the main frequency converter and the auxiliary frequency converter; the processor is respectively electrically connected with the signal acquisition module and the 485 communication module and is used for uploading the running state and fault information of the main frequency converter and the auxiliary frequency converter.
In one embodiment, a panel of the variable frequency drive system cabinet is further provided with a main frequency converter debugging port and an auxiliary frequency converter debugging port, which are used for adjusting variable frequency parameters.
In one embodiment, the panel of the variable frequency drive system cabinet is further provided with indicator lights for displaying the working state of the frequency converter, and the indicator lights correspond to the frequency converter one to one.
The utility model discloses lie in with prior art's difference, the utility model discloses in the frequency conversion driving system cabinet on the well workover car of the frequency conversion drive equipment integration of all equipment in the well site, realized utilizing the well workover car just can be for the power supply of all consumer in each well site. Moreover, the working personnel only need to overhaul and maintain the variable-frequency driving system cabinet on the workover rig without going to the site, so that the labor intensity of the working personnel can be reduced, and the oil and gas production efficiency can be improved.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 is a schematic structural view of a variable frequency drive system for a well servicing vehicle according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a variable frequency drive system for a well servicing vehicle according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a frequency conversion branch circuit in the frequency conversion driving system cabinet according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a main frequency conversion branch in a frequency conversion driving system cabinet according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a plurality of cascaded dual power transfer switches in a variable frequency drive system cabinet according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control unit of a combined drive unit according to an embodiment of the present invention;
fig. 7 is a schematic view of a variable frequency drive system cabinet according to an embodiment of the present invention;
fig. 8 is a schematic view of a front panel of a variable frequency drive system cabinet according to an embodiment of the present invention;
fig. 9 is a schematic view of a left panel of a variable frequency drive system cabinet according to an embodiment of the present invention;
fig. 10 is a schematic view of a rear panel of a variable frequency drive system cabinet according to an embodiment of the present invention;
fig. 11 is a schematic view of a bottom panel of a variable frequency drive system cabinet according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a power supply connection of a well servicing truck according to an embodiment of the present invention.
Detailed Description
The workover rig is special drilling and production equipment for petroleum, is provided with a large-scale generator, and is the most basic and main power source in workover and underground operation construction. The existing workover rig is generally provided with an engine, a generator, a motor, a derrick, a winch part, a variable frequency driving system and the like, and provides operation items such as lifting operation, well circulation operation, rotation operation and the like.
The variable frequency driving system realizes stepless speed regulation by changing frequency, namely synchronously changing the rotating speed of the motor by changing the frequency of a power supply. With the continuous development and progress of power electronic technology, the variable frequency driving system is widely applied. At present, on oil field engineering mechanical equipment, a variable frequency driving system also becomes a vital system component. For example, the frequency converter is used for driving a traveling motor, a winch motor, an oil pump, an oil pipe lifter, a fan and the like of a workover rig. The well workover rig is as the power supply at the well site, in order to deal with different demands, generally need set up corresponding frequency conversion actuating system and drive consumer such as different motors or pumps, therefore, different motors correspond different converter equipment.
In general, a variable frequency driving system and electric equipment driven by the variable frequency driving system are arranged nearby, and even more, a frequency converter, a motor and the like are integrally arranged. Particularly in oil and gas field production, the variable frequency driving system of some special operation electric equipment is generally configured in a well site, for example, the variable frequency driving system of a main oil pump, a blowout preventer and the like in the well site. Therefore, the variable frequency driving systems need to be debugged, overhauled and maintained on site during operation, and workers need to be dispatched to the site to overhaul and maintain when faults occur, so that the production efficiency is obviously reduced. In actual production, the existing workover rig is only equipped with a small number of general variable frequency drive systems, for example, variable frequency drive systems for driving equipment such as a driving motor and an air compressor on the workover rig. Under the condition, part of various variable frequency driving devices in the production system are arranged on the well repairing vehicle, and part of variable frequency driving devices are distributed in a well site, so that the arrangement is relatively dispersed, and the maintenance is not facilitated.
The basic idea of the utility model is that: the variable frequency driving system cabinet is arranged on the well repairing vehicle, the variable frequency system distributed in a well site and the variable frequency driving system on the well repairing vehicle are integrated in the variable frequency driving system cabinet in a unified mode, namely all variable frequency equipment possibly used in production are integrated in the variable frequency driving system cabinet, and therefore the well repairing vehicle can provide variable frequency requirements of various types in the well site. Moreover, the working personnel only need to overhaul and maintain the workover rig and do not need to go to the site.
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
In one embodiment, the variable frequency drive system of a well servicing truck, as shown in fig. 1, comprises a power supply unit 1 and a combined drive unit 2. The combined drive unit 2 is arranged in a variable frequency drive system cabinet 100. The output terminal of the power supply unit 1 is connected to the power input terminal of the combination drive unit 2, thereby supplying power to the combination drive unit 2. The power supply unit 1 may adopt different power supply forms according to user requirements. The power supply unit 1 is used as a power source of the variable frequency drive system cabinet, and can be supplied by battery packs, for example, the battery packs with the nominal voltage of 640VDC and the working voltage range of 540V to 720V. Other power supply modes such as power supply of a generator and power supply of a power grid can be adopted, and adjustment can be performed according to needs.
The combined drive unit 2 comprises a plurality of parallel-connected frequency conversion branches 21, each frequency conversion branch comprises a frequency converter, and the frequency converter is provided with a corresponding output interface to be connected with the external electric equipment 5. In one embodiment, the external powered device 5 may be a motor, a pump, or the like. The combined drive unit 2 is substantially configured to drive a plurality of types of external electric devices by a plurality of inverters. The difference between the conventional design of variable frequency drive system and the present embodiment is that in the conventional design, part of the variable frequency drive is usually installed at the well site, and part of the variable frequency drive is installed on the well repairing vehicle.
Further, a variable frequency drive system for a well servicing truck as shown in fig. 2. Combination drive unit 2 among the frequency conversion actuating system includes 8 frequency conversion branch roads that form through separated time copper bar 210: the frequency conversion branch circuit comprises a frequency conversion branch circuit L1, a frequency conversion branch circuit L2, a frequency conversion branch circuit L3, a frequency conversion branch circuit L4, a frequency conversion branch circuit L5, a frequency conversion branch circuit L6, a frequency conversion branch circuit L7 and a frequency conversion branch circuit L8, and the 8 frequency conversion branch circuits are connected with the power supply input end of the combined driving unit 2 through a main circuit breaker 209. Every frequency conversion branch all is provided with corresponding converter on the road: the frequency converter 201, the frequency converter 202, the frequency converter 203, the frequency converter 204, the frequency converter 205, the frequency converter 206, the frequency converter 207 and the frequency converter 208 are used for driving electric equipment with different requirements. For example, 8 frequency converters are respectively an inverter with power of 355kW or 280kW, an inverter with power of 30kW, an inverter with power of 18kW, two inverters with power of 11kW, and two inverters with power of 5 kW. The electric equipment with the nominal voltage of 380VAC can be driven respectively, and comprises a travelling crane motor, a winch motor, a main oil pump, a blowout preventer, a steering oil pump, an oil pipe lifter, an air compressor, a fan 1, a fan 2 and the like. The combined drive unit 2 is also provided with an auxiliary power supply branch 22. Specifically, fig. 2 shows a composition structure of an auxiliary power supply branch, which includes an auxiliary breaker 221, an inverter 222, and a transformer 223 connected in sequence. The power frequency domestic electricity of 380VAC and 220VAC can be provided, and a DCDC converter can be connected behind the transformer 223 to realize 24V direct current output.
In the embodiment, all the frequency conversion driving equipment possibly used in the well site are integrated in the frequency conversion driving system cabinet, on one hand, the frequency converters dispersed in the well site are arranged in one frequency conversion driving system cabinet, so that the industrial production of the frequency conversion driving equipment used in the oil field production is facilitated; on the other hand, all electric equipment in the well site can be driven only by the well repairing vehicle without independently performing variable frequency driving configuration on the equipment in the well site, and workers do not need to go to the site during maintenance.
In one embodiment, the frequency conversion branch in the combined drive unit shown in fig. 3 includes a main frequency conversion branch L1 and at least one auxiliary frequency conversion branch L2, etc., the main frequency conversion branch L1 is connected with a main frequency converter 201, and an output interface of the main frequency converter 201 is used for connecting an external main electrical device; the auxiliary frequency conversion branch L2 is connected with an auxiliary frequency converter 202, and the like, and an output interface of the auxiliary frequency converter 202 is used for connecting external auxiliary electric equipment.
Furthermore, the working principle of the frequency converter is an electric energy control device which converts a power frequency power supply into another frequency by utilizing the on-off action of a power semiconductor device. Based on the adopted power supply being a battery pack, the main frequency converter and the auxiliary frequency converter are implemented by using inverters, in other embodiments, other types of frequency converters, such as an ac-dc-ac type frequency converter, may also be adopted according to the form of the power supply or the user requirement. In addition, the frequency converter adopted in the embodiment should have the protection of phase loss, overvoltage, undervoltage, overheating, overload, overcurrent, short circuit, communication disconnection and the like, and can more reliably maintain the frequency conversion and the motor operation.
In one embodiment, a dual power transfer switch S11 is further disposed on the main frequency branch L1, and in the main frequency branch structure shown in fig. 4, the main frequency converter is connected to two external main electrical devices through the dual power transfer switch S11. In this case, the main frequency converter 201 may have two sets of macros. Taking an example that a main frequency converter 201 in a variable frequency driving system cabinet can drive a 355kW driving motor of a workover rig and a 280kW winch motor, the driving vehicle driving motor and the winch working motor are switched through a double-power-supply change-over switch S11, and when the double-power-supply change-over switch S11 is rotated to drive a vehicle, the main frequency converter 201 works in a mode of a user macro 1 to drive the 355kW driving motor; when the double power supply change-over switch S11 is rotated to the winch to work, the main frequency converter 201 drives the winch motor to work according to the mode of the user macro 2, and the 280kW winch motor is driven to work. And the other 7 auxiliary frequency converters of the frequency conversion driving system can be used for driving a workover rig and other electric equipment of a well site. In the dual power transfer switch S11 used in this embodiment, the input end of the dual power transfer switch has two sets of three-phase power interfaces that are active and standby each other, and only one of the power input interfaces is needed in this embodiment, so the standby power interface is shorted. And the output end of the double power supply change-over switch S11 has two sets of U, V, W three-phase outputs, so that the power utilization switching of two external main electric devices can be realized.
In one embodiment, as shown in fig. 5, the plurality of dual power transfer switches are cascaded, where the dual power transfer switches are connected in a cascaded manner on a connection line from the main frequency converter to the external main electrical device, and one main frequency converter can drive the plurality of external main electrical devices through the cascaded dual power transfer switches. When the plurality of external main electric devices are powered, the plurality of cascaded dual-power transfer switches can be controlled by a Programmable Logic Controller (PLC) to be switched, so that power supply switching among a plurality of different external main electric devices is realized. For example, when three dual-power transfer switches are used for cascading, a first stage is provided with one dual-power transfer switch, and a second stage is provided with two dual-power transfer switches, then the two dual-power transfer switches in the second stage support and connect 4 external main electric devices. Of course, the support of connecting 4 external main electrical devices does not mean that the solution of the invention requires 4 external main electrical devices to be connected, and the technician can flexibly connect, for example, only 1 external main electrical device or 2 or 3 external main electrical devices, depending on the field requirements and the number of external main electrical devices.
In one embodiment, the control unit 4 for a variable frequency drive system of a well servicing rig, as shown in fig. 6, is used to collect individual frequency converter information and adjust frequency converter parameters. When the frequency converter works, the operation parameters and the like need to be adjusted by combining with actual conditions, and at the moment, the frequency converter needs to be provided with corresponding information acquisition and mechanism configuration capable of debugging the parameters.
Specifically, the specific structure of the control unit 4 mainly includes a signal acquisition module 401 and a processor 402, and the processor 402 is electrically connected to the signal acquisition module 401. The signal acquisition module 401 is connected to the main frequency converter and the auxiliary frequency converter respectively, and is configured to acquire operating states and fault information of the main frequency converter and the auxiliary frequency converter. The collecting module can comprise a current collecting module, a voltage collecting module and other collecting modules or collecting equipment. The processor 402 is electrically connected to the main converter and the auxiliary converter, respectively, for adjusting parameters of the corresponding converters. For example, in one embodiment, the frequency converter is an inverter, and the area of the pulse voltage output by the inverter circuit can be made equal to the area of the desired sine wave in the corresponding interval by controlling the on/off of the switching device in the inverter circuit, and the frequency and the amplitude of the output voltage of the inverter circuit can be adjusted by changing the frequency and the amplitude of the modulation wave. The user can then change the transducer parameters in this way to obtain the desired settings.
Further, the control unit 4 further includes a 485 communication module 403, the 485 communication module 403 is connected to the processor 402, and is configured to upload the operation status and the fault information of the main frequency converter and the auxiliary frequency converter to the vehicle-mounted control PLC system 6, for example, the operation data and the fault code of the motor may be transmitted through 485 communication in the control unit. The processor can also calculate the load condition of each variable frequency branch according to the acquired information, and the load information is sent to the vehicle-mounted control PLC system 6, so that a user can conveniently and timely adjust the load condition.
Fig. 7-11 illustrate a variable frequency drive system cabinet 100, fig. 7 illustrates an exterior of the variable frequency drive system cabinet, fig. 8 illustrates a front panel arrangement of the variable frequency drive system cabinet, fig. 9 illustrates a left panel arrangement, fig. 10 illustrates a rear panel arrangement, fig. 11 illustrates a bottom panel arrangement, described in detail below: a plurality of debugging ports 230 are arranged on the front panel of the variable-frequency driving system cabinet 100, the debugging ports 230 can set variable-frequency parameters of the motor, and the debugging ports 230 can be set to different interface types. For example, the debugging ports are two, namely a main frequency converter debugging port and an auxiliary frequency converter debugging port, wherein the 5-core Weipu debugging port is the main frequency converter debugging port, and when the main frequency converter is debugged, a debugging line is directly plugged for debugging. The net gape is supplementary converter debugging mouth, can assemble into a net gape with the debugging mouth of above-mentioned 7 supplementary converters, when debugging supplementary converter, only need insert the debugging line on the net gape to select the supplementary converter that corresponds, can realize the debugging to supplementary converter. The adjustment opening 230 may be disposed on a cabinet door (i.e., a front panel) of the variable frequency drive system cabinet, such as an upper portion or a top portion of the air inlet louver 231. The front panel of the frequency conversion driving system cabinet is also provided with an indicator light which can represent the running state of the frequency converter, and when the frequency conversion driving system runs, the corresponding indicator light can be lightened. The left panel on the frequency conversion driving system cabinet 100 is provided with various circuit breaker handles, including a main circuit breaker handle 232, an auxiliary power supply branch circuit breaker handle 233 and a switch-over switch handle 234, a worker pulls the handle to cut off power supply, a radiator 235 and a corresponding heat dissipation fan 237 are arranged on the rear panel, and a direct current inlet 236 is further arranged on the rear panel. The bottom panel of the variable frequency drive system cabinet 100 is further provided with a wire inlet and outlet 238, so that a cable is led out from the corresponding wire outlet, and the led cable is connected with an external electric device to supply power to the external electric device.
In one embodiment, a well repairing truck as shown in fig. 12 is provided with a variable frequency drive system cabinet 100, corresponding cables can be led out through outlets on the variable frequency drive system cabinet 100, and an output power supply interface end 7 of the cables is fixedly arranged on the well repairing truck, for example, a special extension socket is arranged on one side of a body of the well repairing truck to serve as a power supply interface end. After the well repairing vehicle runs into a well site, a worker can directly plug a power supply interface of electric equipment 5 (such as a fan 501 and a motor 502 for a well head) in the well site into a power supply interface with a corresponding specification on the well repairing vehicle, and then the well repairing vehicle can supply power to the well site equipment. For example, after the well repairing vehicle enters the well site, after the winch is set up, the winch motor is connected to the corresponding power supply interface, and the fan 501 and the blowout preventer 502 in the well site are respectively connected to the power supply interfaces of the corresponding specifications on the vehicle body, so that the variable frequency driving system cabinet 100 on the well repairing vehicle can provide power for various electric equipment in the well site at the same time.
In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
In light of the foregoing description of the present specification, those skilled in the art will also understand that terms used to indicate orientation or positional relationship, such as "upper", "lower", "front", "rear", "left", "right", "length", etc., are based on the orientation or positional relationship shown in the drawings of the present specification, which are for the purpose of convenience of illustrating aspects of the present invention and simplifying the description, and do not explicitly or implicitly indicate that the device or element involved must have the particular orientation, be constructed and operated in the particular orientation, and thus the above-described orientation or positional relationship terms should not be understood or interpreted as limiting the aspects of the present invention.
In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.
While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. It is intended that the following claims define the scope of the invention and that the module compositions, equivalents, or alternatives falling within the scope of these claims be covered thereby.
Claims (9)
1. A variable frequency drive system for a well servicing vehicle, comprising:
the output end of the power supply unit is connected with the power supply input end of the combined driving unit;
the combined driving unit comprises a plurality of frequency conversion branches connected in parallel, each frequency conversion branch comprises a frequency converter, each frequency converter is provided with a corresponding output interface, and the output interfaces are used for connecting corresponding external electric equipment;
the combined driving unit is arranged in a variable-frequency driving system cabinet.
2. The variable frequency drive system for a well servicing vehicle of claim 1, wherein the power unit is powered by a battery pack.
3. The variable frequency drive system for a well servicing vehicle of claim 1, wherein the combined drive unit further comprises an auxiliary power branch comprising an auxiliary circuit breaker, an inverter and a transformer connected in series.
4. The variable frequency drive system for the well servicing truck of claim 1, wherein the variable frequency branch comprises a main variable frequency branch and at least one auxiliary variable frequency branch, a main frequency converter is connected to the main variable frequency branch, and an output interface of the main frequency converter is used for connecting an external main electrical device; and the auxiliary frequency conversion branch is connected with an auxiliary frequency converter, and an output interface of the auxiliary frequency converter is used for connecting external auxiliary electric equipment.
5. The variable frequency drive system for the workover rig according to claim 4, wherein the main variable frequency branch is further provided with a dual power transfer switch, and the main frequency converter is connected with two external main electric devices through the dual power transfer switch.
6. The variable frequency drive system for the well servicing truck of claim 4, characterized in that a plurality of cascaded dual power transfer switches are further disposed on the main variable frequency branch, and the main frequency converter is connected to at least two external main electrical devices through the cascaded dual power transfer switches.
7. The variable frequency drive system for a workover rig according to claim 4, wherein the combined drive unit further comprises a control unit, the control unit comprises a signal acquisition module, a 485 communication module and a processor, the signal acquisition module is respectively connected with the main frequency converter and the auxiliary frequency converter and is used for acquiring the running state and fault information of the main frequency converter and the auxiliary frequency converter; the processor is respectively electrically connected with the signal acquisition module and the 485 communication module and is used for uploading the running state and fault information of the main frequency converter and the auxiliary frequency converter.
8. The variable frequency drive system for the workover rig according to claim 4, wherein a main frequency converter debugging port and an auxiliary frequency converter debugging port are further arranged on a panel of the variable frequency drive system cabinet and used for adjusting variable frequency parameters.
9. The variable frequency drive system for the well servicing truck of claim 1, wherein an indicator light for displaying the working state of the frequency converter is further provided on a panel of the variable frequency drive system cabinet, and the indicator light corresponds to the frequency converter one to one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120973629.XU CN215072221U (en) | 2021-05-08 | 2021-05-08 | Variable-frequency driving system for well repairing vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120973629.XU CN215072221U (en) | 2021-05-08 | 2021-05-08 | Variable-frequency driving system for well repairing vehicle |
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| CN215072221U true CN215072221U (en) | 2021-12-07 |
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| CN202120973629.XU Active CN215072221U (en) | 2021-05-08 | 2021-05-08 | Variable-frequency driving system for well repairing vehicle |
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