CN113783109B - Motor variable frequency control cabinet assembled in modularized mode - Google Patents
Motor variable frequency control cabinet assembled in modularized mode Download PDFInfo
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- CN113783109B CN113783109B CN202111047783.5A CN202111047783A CN113783109B CN 113783109 B CN113783109 B CN 113783109B CN 202111047783 A CN202111047783 A CN 202111047783A CN 113783109 B CN113783109 B CN 113783109B
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- control unit
- frequency control
- connecting rod
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- 238000009434 installation Methods 0.000 claims abstract description 49
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- 238000004891 communication Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
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- 238000009423 ventilation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
Abstract
The modular assembled motor variable frequency control cabinet comprises a cabinet body, wherein a plurality of installation positions are arranged on the cabinet body, a system controller is further arranged on the system controller, and a second wiring port corresponding to a wiring port on a variable frequency control unit is arranged on the system controller; the frequency conversion control unit comprises a shell matched with the installation position in size, and is provided with a wiring port, an air switch and a contact linkage switch operating handle; a power unit, a connecting rod and a conductive terminal are arranged in the power unit; the connecting rod and the contact linkage switch operating handle can be in reciprocating mechanical linkage, the connecting rod is provided with a conducting strip, the rear end of the connecting rod is provided with a locating piece, the conducting strip and the conducting terminal can be electrically connected or disconnected in the mechanical linkage process of the connecting rod, and meanwhile the locking and unlocking functions of the variable frequency control unit are completed. The invention unifies the size and the assembly mode of the variable frequency control unit and adopts a modularized installation mode; meanwhile, a linkage switch is adopted for mechanical positioning and electrical on-off, so that the operation is simple and the assembly is convenient.
Description
Technical Field
The invention belongs to the field of motor control cabinets, and particularly relates to a modular assembled motor control cabinet.
Background
The motor frequency conversion control is a power electronic technology for controlling the rotating speed of an alternating current motor by changing the frequency mode of a working power supply of the motor through a frequency conversion technology and a microelectronic technology. The motor frequency conversion control device can be a universal frequency converter or a specially designed frequency conversion power unit. The motor variable frequency control device generally comprises a rectifying unit (alternating current-direct current), a filtering unit, an inversion unit (direct current-alternating current), a braking unit, a driving unit, a detecting unit, a micro-processing unit and other main units. The motor variable frequency control device adjusts the voltage and frequency of an output power supply by switching on and off a power switch (such as an IGBT) in an internal circuit, and changes the rotating speed of a motor according to the actual requirement of a motor system so as to achieve the purposes of energy conservation and speed regulation; in addition, the motor frequency conversion control device is also provided with a plurality of protection functions, such as overcurrent, overvoltage, overload protection and the like. Along with the continuous improvement of the industrial automation degree, the motor variable frequency control device is also widely applied.
In the prior art, for unified wiring, installation, management and maintenance, a motor variable frequency control cabinet is generally adopted, and a plurality of frequency converter units are arranged on the motor variable frequency control cabinet, so that the motor variable frequency control cabinet can be widely applied to industries such as metallurgy, chemical industry, petroleum, water supply, mine, building materials, motor industry and the like.
At present, in a multi-pump or fan system, a motor variable frequency control cabinet is mainly one or more universal frequency converters and is fixedly arranged in a standard industrial electric control cabinet to form the motor variable frequency control cabinet; the controller is realized by a PLC and is connected with each frequency converter through a special communication cable to transmit the motor rotating speed instruction and update the control parameters. However, because of great differences in installation sizes and modes of universal frequency converters of different manufacturers, there is no unified standard, so that the motor frequency conversion control cabinet of a supplier needs to be designed and processed independently according to different requirements of customers, and although the functions are the same, there is no unified standard and flow in the design and assembly process, and the control level of product cost and quality is low.
In addition, for the end user, the maintenance of the conventional electric control cabinet is inconvenient, the frequency converter unit is replaced in complicated procedures, the time is long, and the maintenance, replacement and upgrading of the power unit are difficult to carry out on the application site; in special applications, it is not possible to replace a faulty frequency converter unit when the motor frequency conversion control cabinet is powered on.
Therefore, based on the problems existing in the prior art, the application provides a modularized design scheme of the motor variable frequency control cabinet so as to realize standardization of user application.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a modular motor frequency conversion unit structural design and combination method of a motor frequency conversion control cabinet, which is not only suitable for a system with only one frequency conversion unit, but also can be expanded to the application of frequency conversion control of a plurality of motors. The invention unifies the size and the assembly mode of the variable frequency control unit, and adopts a modularized installation method; meanwhile, the double functions of mechanical assembly and electrical on-off are realized by using the specially designed multi-group contact linkage switch, and the operation is simple and convenient. More importantly, the frequency conversion unit designed by the method can replace the frequency conversion control unit to be maintained or failed under the condition that other motor frequency conversion units in the same cabinet are normally electrified to operate, so that hot plug installation is realized.
The invention is solved by the following technical scheme.
The modular assembled motor variable frequency control cabinet comprises a cabinet body, wherein a plurality of mounting positions for mounting variable frequency control units are arranged in the cabinet body in a regular arrangement; the cabinet body is internally provided with a system controller, and the system controller can comprise a special control board or a general Programmable Logic Controller (PLC) or general automatic control equipment with similar functions; the system controller is provided with second wiring ports which are in one-to-one correspondence with wiring ports on the variable frequency control unit, and the two wiring ports are connected through pluggable flat cables or can be connected through communication signal cables with shielding layers; the variable frequency control unit comprises a shell matched with the installation position in size, and a wiring port, an air switch operation handle and a contact linkage switch operation handle are arranged on a front end cover plate of the variable frequency control unit; the power unit, the connecting rod and the conductive terminal are arranged in the variable frequency control unit; the connecting rod is linked with the contact linkage switch operating handle, the connecting rod is provided with a conducting strip, the rear end of the connecting rod is provided with a positioning piece, and the conducting strip and the conducting terminal can be connected or disconnected in the movement process of the connecting rod; meanwhile, locking and unlocking functions in the installation and positioning of the variable frequency control unit can be realized through the clamping in and the clamping out of the positioning piece; the wiring port is connected to the corresponding socket of the power unit through a flat cable or a shielding cable, and the power unit, the air switch and the conductive terminal are in conductive communication.
The application relates to a motor variable frequency control cabinet, which adopts a modularized and expandable structure, and is specifically characterized in that: the cabinet body is of a unified general structure, the matched installation frequency conversion control units can be rapidly installed and detached, a certain number of installation frequency conversion control units can be assembled on the cabinet body according to the needs, and modularized installation is realized; the installation frequency conversion control unit is matched with the installation position, the size and the shape are uniform, and the installation frequency conversion control unit is a modularized unit, so that modularized installation is realized.
The application discloses a multi-group contact linkage switch, which adopts a mechanical linkage structure, and drives a plurality of groups of electric conducting plates to mechanically reciprocate through the parallel reciprocating displacement or the rotary reciprocating displacement of a movable connecting rod, so that each group of the electric conducting plates is clamped in and separated from two states respectively corresponding to the electric conducting plates according to two preset different positions. The connecting rod and the operating handle are mechanically linked to displace, so that the conducting strip is electrically connected or disconnected with a corresponding pair of conducting terminals.
The multi-group contact linkage switch adopts a mechanical linkage structure, drives the clamping in and the clamping out of the positioning piece through the parallel reciprocating displacement or the rotary reciprocating displacement of the movable connecting rod, and realizes the functions of the installation positioning, locking and unlocking and installation state indication of the variable frequency control unit.
In a preferred embodiment, the multiple-contact ganged switch may be provided with a rotary operating shuttle link, a panel operating handle, multiple sets of conductive strips and contacts, a positioning member, and the like. The panel operating handle has only two working positions: a horizontal position and a vertical position. When the panel operating handle is in the horizontal position, each group of conducting strips are in a state of being separated from the corresponding contact; when the panel operating handle is in the vertical position, each group of conducting strips is in a state of being clamped into the corresponding contact. Before the frequency conversion control unit is installed, the panel operating handle is in a horizontal position, namely in an unlocking state. The panel operation handle is rotated clockwise for 90 degrees, the handle is linked with the connecting rod to rotate clockwise for 90 degrees, a plurality of groups of conductive sheets are fixed on the connecting rod and rotate clockwise for 90 degrees together with the operation handle, so that each group of conductive sheets is electrically connected with a corresponding pair of conductive terminals; after the installation of the frequency conversion control unit is completed, the panel operating handle is in a vertical position, namely in a locking state, the panel operating handle is rotated anticlockwise by 90 degrees, the handle linkage connecting rod is rotated anticlockwise by 90 degrees, a plurality of groups of conducting strips are fixed on the connecting rod, and the conducting strips and the operating handle are rotated anticlockwise by 90 degrees together, so that the electric disconnection between each group of conducting strips and a corresponding pair of conducting terminals is realized, meanwhile, the unlocking is also realized, and the frequency conversion control unit can be taken out.
In a preferred embodiment, the panel operating handle drives the reciprocating connecting rod, and the positioning piece is fixed on the reciprocating connecting rod and rotates in linkage with the reciprocating connecting rod. When the panel operating handle is in a horizontal position, the variable frequency control unit is in an unlocking state and can be installed or detached; when the panel operating handle is in a vertical position, the variable frequency control unit is in a locking state and can be electrified and operated. When the panel operating handle is in the horizontal position, the positioning piece is in a free moving state. The panel operation handle is rotated clockwise for 90 degrees, the handle linkage connecting rod is rotated clockwise for 90 degrees, the positioning piece and the operation handle are rotated clockwise for 90 degrees together, the positioning piece is screwed into the mechanical fixing and locking station, and the frequency conversion control unit installation procedure is finished; the panel operation handle is rotated anticlockwise by 90 degrees, the handle linkage connecting rod is rotated anticlockwise by 90 degrees, the positioning piece and the operation handle are rotated anticlockwise by 90 degrees together, the mechanical fixing and locking station is unscrewed, then the variable frequency control unit is taken out, and the taking-out procedure is finished. The frequency conversion control unit is installed and taken out, and the frequency conversion control unit can be independently detached and assembled to realize hot plug operation under the condition that the work of other units is not influenced in the state that the positioning piece is separated from the frequency conversion control unit in the power-off state; the frequency conversion control unit can not be pulled out at the time in the clamping state of the corresponding positioning piece under the power-on state, so that the safety is high.
In a preferred embodiment, the cabinet body is provided with a terminal row, and the terminal row is provided with a total air switch and a contactor to control power supply of the electrical components on the cabinet body.
In a preferred embodiment, the plurality of installation positions on the cabinet body are arranged in an upper row and a lower row, the system controller is arranged between the upper row and the lower row of installation positions, the structure is compact, and the connection operation of the wiring port on the variable frequency control unit on the upper row and the lower row of installation positions and the second wiring port is convenient.
In a preferred embodiment, 1-4 mounting locations are provided per row.
In a preferred embodiment, the frequency conversion control unit is provided with a mounting plate, and the power unit is mounted on the mounting plate and has a stable structure.
In a preferred embodiment, one end of the connecting rod passes through the shell and then is fixed on the contact linkage switch operating handle on the outer side, and the other end of the connecting rod passes through the assembly plate and is provided with a positioning piece; the shell is provided with a through hole for the locating piece to pass through, and the mounting position is provided with a clamping groove for the locating piece to insert. In this structure, the location, the supporting stability of connecting rod, rotatory convenient operation, compact structure.
In a preferred embodiment, six conductive plates are arranged on the connecting rod, and the conductive terminals comprise three groups of incoming line terminals and three groups of outgoing line terminals, which are respectively in one-to-one correspondence with the conductive plates and respectively correspond to a three-phase power input connecting wire and a three-phase motor output connecting wire.
In a preferred embodiment, the conductive terminals are disposed on the upper and lower sides or the left and right sides of the rotational position of the conductive sheet, and the conductive sheets are connected in a group by a substrate.
In a preferred embodiment, the outer side surface of the variable frequency control unit is provided with an installation handle, so that the variable frequency control unit is convenient to carry, install and detach.
In a preferred embodiment, the rear end panel of the variable frequency control unit is provided with a fan and corresponding heat dissipation ventilation holes for heat dissipation, and the backboard of the cabinet body is provided with ventilation holes correspondingly.
Compared with the prior art, the invention has the following beneficial effects: the motor variable frequency control cabinet assembled in a modularized mode is provided, the size and the assembly mode of each variable frequency control unit are unified, and the modularized installation mode is adopted; meanwhile, a plurality of groups of contact linkage switches are adopted to carry out electric on-off, isolation and mechanical assembly, so that the operation is convenient, and the normal power-on of the motor variable frequency control cabinet and the installation and the disassembly of the variable frequency control unit under the operating condition can be realized.
Drawings
Fig. 1 is a perspective view of a motor variable frequency control cabinet according to an embodiment of the present invention.
Fig. 2 is a perspective view of a motor variable frequency control cabinet according to another embodiment of the present invention.
Fig. 3 is a perspective view of a motor variable frequency control cabinet with a part of installation positions vacant.
Fig. 4 is a perspective view of a variable frequency control unit in the present invention.
Fig. 5 is an internal schematic diagram of the variable frequency control unit in the present invention.
Fig. 6 is a cross-sectional view of the variable frequency control unit of the present invention installed in an installation position.
Fig. 7 is a schematic diagram of an assembly structure of the variable frequency control unit and the installation position.
Fig. 8 is a schematic diagram II of the assembly structure of the variable frequency control unit and the installation position.
Fig. 9 is a schematic diagram of the conductive sheet structure in the energized state.
Fig. 10 is a schematic diagram of the conductive sheet structure in the power-off state.
Fig. 11 is an enlarged schematic view of a conductive sheet and a conductive terminal in an embodiment.
Fig. 12 is an enlarged schematic view of a conductive sheet and a conductive terminal in another embodiment.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, and the embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms: the directions of the center, the longitudinal, the lateral, the length, the width, the thickness, the upper, the lower, the front, the rear, the left, the right, the vertical, the horizontal, the top, the bottom, the inner, the outer, the clockwise, the counterclockwise, etc. indicate the directions or the positional relationship based on the directions or the positional relationship shown in the drawings, are merely for convenience of description and simplification of the description, and therefore, should not be construed as limiting the present invention. Furthermore, the term: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of features shown. In the description of the present invention, unless explicitly specified and defined otherwise, the terms: mounting, connecting, etc. should be construed broadly and the specific meaning of the terms in the present application will be understood by those skilled in the art in view of the specific circumstances.
Referring to fig. 1 to 12, the modular assembled motor variable frequency control cabinet according to the present application comprises a cabinet body 5, wherein a plurality of mounting positions 55 for mounting variable frequency control units 1 are regularly arranged on the cabinet body 5; the cabinet body 5 is provided with a system controller 51, the system controller 51 is provided with second wiring ports 53 which are in one-to-one correspondence with the wiring ports 13 on the variable frequency control unit 1, the two wiring ports are connected through pluggable flat cables or cables, and the system controller 51 can control the variable frequency control unit 1 after connection; the variable frequency control unit 1 comprises a shell matched with the installation position 55 in size, and a wiring port 13, an air switch 11 and a contact linkage switch operating handle 14 are arranged on a front end panel of the variable frequency control unit 1; a power unit 2, a connecting rod 141 and a conductive terminal 32 are arranged in the variable frequency control unit 1; the connecting rod 141 is linked with the contact linkage switch operating handle 14, and the connecting rod 141 is provided with a conductive sheet 31, and the conductive sheet 31 can be a copper sheet or an aluminum sheet and has enough rigidity or strength. The rear end of the connecting rod 141 is provided with a positioning piece 142, and the connecting rod 141 can drive the conducting strip 31 to be connected or disconnected with the conducting terminal 32 in the rotating process of the connecting rod 141, and can also drive the positioning piece 142 to be clamped in or separated from the conducting terminal 32; the wiring port 13 is connected to a corresponding socket of the power unit 2 through a flat cable or a cable 136, and the power unit 2, the air switch 11 and the conductive terminal 32 are electrically connected.
Specifically, as can be seen from fig. 1 to 3, in the present application, the cabinet body 5 is provided with a terminal row 52 for input and output, generally in a section below the cabinet body, the terminal row 52 is provided with a total air switch 521 and a contactor 522, and the total air switch 521 and the contactor 522 are connected in parallel to each installation position 55, and power is supplied to the variable frequency control unit 1 through the contacts. In addition, a plurality of installation positions 55 on the cabinet body 5 are arranged in two rows up and down, the system controller 51 is arranged between the two rows of installation positions 55 up and down, the structure is compact, the connection operation of the wiring port 13 and the second wiring port 53 on the variable frequency control unit 1 on the two rows of installation positions 55 up and down is convenient, and each row is provided with 1-4 installation positions 55. A sliding rail structure can be arranged in the mounting position 55, so that the frequency conversion control unit 1 can be conveniently pushed in and pulled out.
Specifically, as can be seen from fig. 4 to 7, in the present application, the outer side surface of the variable frequency control unit 1 is provided with an installation handle 12, which is convenient for carrying, installation and disassembly. The frequency conversion control unit 1 is provided with a fan 15, the position of which can be higher than that of the power unit 2 for heat dissipation, and correspondingly, a heat dissipation vent 155 for ensuring that the power unit 2 is effectively assisted in heat dissipation.
The frequency conversion control unit 1 is provided with a mounting plate 21, the power unit 2 is mounted on the mounting plate 21, specifically, the mounting plate 21 is vertically arranged, the power unit 2 is vertically mounted on the mounting plate 21, and the power input and output of the power unit are respectively connected with a power supply grid and a driven motor through a conductive sheet 31 and a conductive terminal 32 on the connecting rod 141.
One end of the connecting rod 141 passes through the shell and is fixed on the contact linkage switch operating handle 14 on the outer side, and the other end passes through the assembly plate 21 and is provided with a positioning piece 142; the shell is provided with a through hole for the positioning piece 142 to pass through, the mounting position 55 is provided with a clamping slot 411 on the bottom plate 41 for the positioning piece 142 to be inserted, the positioning piece 142 can enter the clamping slot 411 to realize locking, the variable frequency control unit 1 is prevented from sliding out of the mounting position 55, and one or more positioning pieces 142 can be arranged. In this structure, the connecting rod 141 is positioned and supported stably, and the rotary operation is convenient and the structure is compact.
In the present application, six conductive plates 31 are mounted on the connecting rod 141, and the conductive terminals 32 include three groups of incoming line terminals and three groups of outgoing line terminals, which are respectively in one-to-one correspondence with the conductive plates 31, and respectively correspond to a three-phase power input connection line and a three-phase motor output connection line. The conductive terminals 32 are disposed on the upper and lower sides or the left and right sides of the rotational position of the conductive sheet 31. Each group of conductive terminals 32 has two poles, one of which is located on the insulating substrate 321 in the frequency conversion control unit 1, and the other is located on the insulating substrate 321 on the substrate support of the corresponding mounting position 55, and the conductive sheet 31 can be connected to each group of conductive terminals 32 through mechanical displacement.
Specifically, the conductive terminal 32 in the above structure can be connected with a three-phase or single-phase power input terminal of the motor variable frequency control cabinet; when the variable frequency control unit 1 needs to be replaced when the input power is turned on, the power unit 2 in the variable frequency control unit 1 can be electrically connected with the conductive terminal 32 via a three-phase or single-phase air circuit breaker; first, the circuit breaker is opened, and then the conductive terminal 32 is opened by operating the handle 14, and the power supply of the inverter control unit 1 is cut off. In this embodiment, the conductive terminals 32 have two sets, one set is installed in the variable frequency control unit 1, the other set is installed in the bottom plate 41, and after the variable frequency control unit 1 is installed in the installation position 55, the connecting rod 141 is turned to drive the conductive sheet 31 thereon to be electrically communicated with the two sets of conductive terminals 32.
Fig. 7 to 12 are schematic views of the conductive structures on the connecting rod 141. The conductive terminals 32 are provided on the upper and lower sides, and when the variable frequency control unit 1 is inserted into the mounting position 55, the communication region can be opened by turning the contact-linked switch operation handle 14. The contact linkage switch operating handle 14 is a bar-shaped hand-held part, when the contact linkage switch operating handle 14 rotates to a vertical state, the conductive sheet 31 on the connecting rod 141 is attached to the conductive terminal 32, so that conductivity is realized, and when the contact linkage switch operating handle 14 rotates to a horizontal state, the contact linkage switch operating handle 14 is separated from the conductive terminal 32, and is in a power-off state. Fig. 11 is a schematic diagram of a conductive structure in one embodiment, and fig. 12 is a schematic diagram of a conductive structure in another embodiment, in which a card 323 is disposed on one side of each conductive terminal 32, and a groove is formed between the conductive terminal 32 and the card 323 for the conductive sheet 31 to enter, so as to realize a more stable conductive contact.
In the application, the shell of the variable frequency control unit 1 is provided with the front end cover plate, the rear end cover plate, the top plate and the left and right side plates, and in the actual assembly process, the left and right side plates and the top plate can be omitted according to the installation position, thereby being beneficial to heat dissipation. Further, the status signal of the fan 15 for cooling may be connected to a system controller for monitoring and alarming, and the variable frequency control unit 1 may be provided with a temperature sensor for temperature monitoring and alarming.
As can be seen from the above description, the motor variable frequency control cabinet of the present application adopts a modularized and expandable structure, which is specifically implemented in: the cabinet body 5 is of a unified general structure, the matched installation frequency conversion control units 1 can be quickly installed and detached, a certain number of installation frequency conversion control units 1 can be assembled on the cabinet body 5 according to the need, and modularized installation is realized; the installation frequency conversion control unit 1 is matched with the installation position 55, the size and the shape are uniform, and the installation is modularized.
In addition, in the rotating process of the connecting rod 141, the connection or disconnection of the conductive sheet 31 and the conductive terminal 32 can be realized, the function of an electric isolating switch is realized, the clamping in and the clamping out of the positioning piece 142 can be realized, and the mechanical locking and unlocking functions of the frequency conversion control unit 1 are realized. In the power-off state, the frequency conversion control unit 1 can be taken out corresponding to the release state of the positioning piece 142, namely, the frequency conversion control unit 1 with power-off can be taken out under the condition that other frequency conversion control units 1 are powered on to work, so that hot plug operation is realized. The locking state of the corresponding positioning member 142 in the energized state is a locked state, and the variable frequency control unit 1 cannot be pulled out at this time, so that the safety is high.
Furthermore, in the present application, voltage and current sensors may be installed in the power supply line, and then the voltage and current detection signals are connected to the system controller circuit board via the measurement cable, implementing monitoring of the power supply grid voltage, current and total input power. The connection cable between the variable frequency control unit 1 and the system controller 51 may have a connection state recognition function, and when the connection cable is disconnected from the variable frequency control unit 1, the system controller may detect the disconnection state, and may selectively implement bypass of the variable frequency control unit, and drive the corresponding motor to operate at power frequency through a dedicated contactor.
Specifically, the motor variable frequency control cabinet has the following beneficial effects: 1) The frequency conversion control unit realizes modularized design and processing, and is easy to reduce cost and control quality; 2) The power unit in the variable frequency control unit can be a universal frequency converter, and the universal frequency converter with different manufacturers and performances can be flexibly selected according to the requirements of customers, but the standardization in product design and maintenance can still be maintained; 3) The motor variable frequency control cabinet is very convenient to maintain, maintenance personnel do not need to master the maintenance skill of the power unit in the complex variable frequency control unit, do not need to know the instruction manual of the universal frequency converter products of different manufacturers, and can be on duty only through simple training; 4) In the application site, the frequency conversion control unit has short replacement time (for example, less than 10 minutes), so that the shutdown maintenance time of a customer is greatly reduced; 5) The upgrading and transformation of the frequency conversion control unit and the exchange and replacement of the universal frequency converter products of different factories are easy to realize.
In the above, the invention provides the modularized assembled motor variable frequency control cabinet, which unifies the size and the assembly mode of each variable frequency control unit and adopts the modularized installation mode; meanwhile, a plurality of groups of contact linkage switches are adopted to conduct electric on-off and isolation, operation is convenient, and hot plug installation and disassembly of the frequency conversion control unit under the working condition of power-on operation of the motor frequency conversion control cabinet can be achieved.
The scope of the present invention includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the invention.
Claims (8)
1. The modular assembled motor variable frequency control cabinet comprises a cabinet body (5) and is characterized in that a plurality of mounting positions (55) for mounting a variable frequency control unit (1) are arranged in the cabinet body (5) in a regular arrangement;
A system controller (51) is arranged in the cabinet body (5), and the system controller (51) comprises a special control board, or a general programmable logic controller, or general automatic control equipment; the system controller (51) is provided with second wiring ports (53) which are in one-to-one correspondence with the wiring ports (13) on the variable frequency control unit (1), and the two wiring ports are connected through pluggable flat cables or are connected through communication signal cables with shielding layers;
The variable frequency control unit (1) comprises a shell which is matched with the installation position (55) in size, and a wiring port (13), an air switch operating handle (11) and a contact linkage switch operating handle (14) are arranged on a front end cover plate of the variable frequency control unit (1); a power unit (2), a connecting rod (141) and a conductive terminal (32) are arranged in the variable frequency control unit (1); the power unit (2) is a universal frequency converter product or a customized frequency conversion power module; the connecting rod (141) is linked with the contact linkage switch operating handle (14), the connecting rod (141) is provided with a conducting strip (31), the rear end of the connecting rod (141) is provided with a positioning piece (142), the connecting rod (141) can be connected or disconnected with the conducting strip (31) and the conducting terminal (32) in the moving process, and meanwhile, the positioning piece (142) can be clamped in or separated out;
the wiring port (13) is connected to a corresponding socket of the power unit (2) through a flat cable or a cable (136), and the power unit (2), the air switch (11) and the conductive terminal (32) are electrically communicated;
An assembly plate (21) is arranged in the variable frequency control unit (1), and the power unit (2) is arranged on the assembly plate (21);
one end of the connecting rod (141) passes through the shell and then is fixed on the contact linkage switch operating handle (14) at the outer side, and the other end of the connecting rod passes through the assembly plate (21) and is provided with a positioning piece (142); the shell is provided with a through hole for the positioning piece (142) to pass through, and the mounting position (55) is provided with a clamping groove (411) for the positioning piece (142) to insert.
2. The modular assembled motor frequency conversion control cabinet according to claim 1, wherein the cabinet body (5) is provided with a terminal row (52), and the terminal row (52) is provided with a total air switch (521) and a contactor (522).
3. The modular assembled motor variable frequency control cabinet according to claim 1, wherein the plurality of mounting positions (55) on the cabinet body (5) are arranged in two rows, and the system controller (51) is arranged between the two rows of mounting positions (55).
4. A modular assembled motor frequency conversion control cabinet according to claim 3, characterized in that 1-4 mounting locations (55) are provided per row.
5. The modular assembled motor variable frequency control cabinet according to claim 1, wherein six conductive plates (31) are arranged on the connecting rod (141), and the conductive terminals (32) comprise three groups of incoming line terminals and three groups of outgoing line terminals which are respectively in one-to-one correspondence with the conductive plates (31).
6. The modular assembled motor inverter control cabinet of claim 5, wherein the conductive terminals (32) are disposed at upper and lower sides or left and right sides of a rotational position of the conductive sheet (31), and the conductive sheet (31) can turn on or off the conductive terminals (32) on the insulating substrate (321).
7. The modular assembled motor variable frequency control cabinet according to claim 1, characterized in that the front panel of the variable frequency control unit (1) is provided with a mounting handle (12).
8. The modular assembled motor frequency conversion control cabinet according to claim 1, characterized in that the rear panel of the frequency conversion control unit (1) is provided with a fan (15) and a corresponding heat dissipation vent (155).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111047783.5A CN113783109B (en) | 2021-09-08 | 2021-09-08 | Motor variable frequency control cabinet assembled in modularized mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111047783.5A CN113783109B (en) | 2021-09-08 | 2021-09-08 | Motor variable frequency control cabinet assembled in modularized mode |
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| Publication Number | Publication Date |
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| CN113783109A CN113783109A (en) | 2021-12-10 |
| CN113783109B true CN113783109B (en) | 2024-05-24 |
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|---|---|---|---|---|
| CN1741318A (en) * | 2004-08-26 | 2006-03-01 | 松下电工株式会社 | Fast connecting terminal device |
| CN103227422A (en) * | 2012-01-30 | 2013-07-31 | 西门子公司 | Switching device for a switchgear cabinet |
| CN108807039A (en) * | 2018-07-25 | 2018-11-13 | 中国船舶重工集团公司第七0四研究所 | Medium Voltage Switchgear cable vault cabinet door interlock |
| CN215870215U (en) * | 2021-09-08 | 2022-02-18 | 宁波九荣环保科技有限公司 | Motor variable frequency control cabinet of modularization assembly |
| CN215869034U (en) * | 2021-09-08 | 2022-02-18 | 宁波九荣环保科技有限公司 | Contact linkage switch for variable frequency control unit |
| CN215871154U (en) * | 2021-09-08 | 2022-02-18 | 宁波九荣环保科技有限公司 | Frequency conversion control unit |
-
2021
- 2021-09-08 CN CN202111047783.5A patent/CN113783109B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741318A (en) * | 2004-08-26 | 2006-03-01 | 松下电工株式会社 | Fast connecting terminal device |
| CN103227422A (en) * | 2012-01-30 | 2013-07-31 | 西门子公司 | Switching device for a switchgear cabinet |
| CN108807039A (en) * | 2018-07-25 | 2018-11-13 | 中国船舶重工集团公司第七0四研究所 | Medium Voltage Switchgear cable vault cabinet door interlock |
| CN215870215U (en) * | 2021-09-08 | 2022-02-18 | 宁波九荣环保科技有限公司 | Motor variable frequency control cabinet of modularization assembly |
| CN215869034U (en) * | 2021-09-08 | 2022-02-18 | 宁波九荣环保科技有限公司 | Contact linkage switch for variable frequency control unit |
| CN215871154U (en) * | 2021-09-08 | 2022-02-18 | 宁波九荣环保科技有限公司 | Frequency conversion control unit |
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|---|---|
| CN113783109A (en) | 2021-12-10 |
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