Integrated installation box of control circuit in frequency converter

Abstract

The utility model provides an integrated installation box of a control circuit in a frequency converter, the integrated installation box is installed in a cabinet body of a control cabinet of the frequency converter 1, the interior of the integrated installation box is used for fixedly installing control devices of the control circuit of the frequency converter, and external interfaces of the control devices are reserved on a control unit panel of the integrated installation box. And each control device is connected with a power loop of the frequency converter through an external interface. Through the design of the integrated mounting box structure, the integrated mounting box for the control circuit in the frequency converter has better layout and electromagnetic shielding effects, and is simple in structure, convenient to use, convenient to disassemble and easy to maintain.

Description

Technical Field

[0001] The utility model relates to a frequency converter, in particular to an integrated installation box of a control circuit in the frequency converter. Background Art

[0002] The frequency converter is an electric power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The frequency converter mainly includes a power circuit composed of rectification and inverter units and a control circuit composed of calculation, detection, and drive. The control circuit can be said to be the operation command center of the power circuit, which determines the operating status and output characteristics of the inverter in the power circuit. The two are electrically isolated by means of photoelectric isolation to ensure that the stable and reliable operation of the control circuit is not affected by the high voltage and high current of the power circuit, and to prevent interference signals from being transmitted back to the control circuit. In practical applications, the command signal received by the control circuit will be converted into an action command to drive the power circuit, thereby achieving efficient and accurate control of the motor.

[0003] At present, the control circuit often directly installs each control device in the inverter, that is, according to the arrangement of the power circuit in the inverter, find a suitable position and install each device of the control circuit directly in the remaining space in the inverter. Although each control device of the control circuit is installed in the remaining space, it is installed separately. Each control device is installed and removed separately, not as a whole. After the installation is completed, the wiring between the control circuits is started. Due to the high degree of integration of the inverter, the remaining space reserved for the control circuit is generally small, and the installation and wiring are more troublesome, and it is difficult to maintain in the later stage. The direct installation of each control device of the control circuit also has the problem of unsightly installation and wiring; and because each control device is in the same space as the power circuit, it may be affected by electromagnetic interference from the power circuit and other problems. Utility Model Content

[0004] The utility model provides an integrated installation box for the control circuit in the frequency converter, which solves the problem of bulk installation of various control components of the control circuit. The technical solution is as follows:

[0005] An integrated installation box for a control circuit in a frequency converter, the integrated installation box is installed inside a cabinet of a frequency converter control cabinet, and the interior is used to fix and install various control components of the frequency converter control circuit, and the external interface of each control component is reserved on the control unit panel of the integrated installation box, and the connection between each control component and the frequency converter power circuit is realized through the external interface.

[0006] The control circuit comprises an optical fiber adapter board, and the optical fiber adapter board is connected to the optical fiber adapter interface of the control unit panel.

[0007] The control circuit includes a power supply and a filter. The external power reaches the power supply after passing through the filter. The power supply is used to supply power to other components of the integrated installation box.

[0008] The control unit panel includes a high-voltage signal line adapter spring through-wall terminal for connecting to a fiber optic adapter board.

[0009] The control unit panel includes a signal line transfer spring through-wall terminal block for connecting a controller, a relay and a terminal block of a control circuit.

[0010] The control unit panel includes a network port adapter interface for connecting to a controller of a control circuit.

[0011] The shell of the integrated installation box includes a controller shell and a cover plate. The controller shell is a rectangular shape lacking a panel, and the panel is buckled by the cover plate. The combination of the controller shell and the cover plate forms a rectangle. Countersunk screw holes are provided on both sides of the controller shell lacking the panel, and rivet nuts are provided at corresponding positions of the cover plate.

[0012] A handle is arranged in the middle of the control unit panel.

[0013] The inverter control cabinet is provided with a slide rail at a location where the integrated installation box is installed.

[0014] The controller housing and cover are made of Q235 carbon steel with nickel plating.

[0015] The integrated installation box of the control circuit in the inverter has better layout and electromagnetic shielding effects through the design of the integrated installation box structure, and has a simple structure, is easy to use, easy to disassemble, and simple to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an integrated installation box of a control circuit in the frequency converter being located in the frequency converter;

[0017] Figure 2 is a schematic diagram of various control components inside the integrated installation box;

[0018] Figure 3 It is a schematic diagram of the interface of the control unit panel. DETAILED DESCRIPTION

[0019] like Figure 1As shown, the integrated installation box 2 of the control circuit in the inverter is installed inside the cabinet of the inverter 1 control cabinet, occupying a part of the space therein to realize the control of the power circuit in the control cabinet. Through the integrated installation box 2, the various control devices of the control circuit are placed in the same metal box, and the cable interconnection between the various control devices is completed in the metal box. The external interface of each control device is reserved on the control unit panel of the integrated installation box, and the external interface includes a through-wall terminal, an optical fiber adapter, an RJ45 network port adapter, etc. In this way, the connection between the various control devices is the same as before the integrated installation box 2, and the connection between each control device and other external devices has changed. It was originally directly wired, but now it is transferred through the interface on the integrated installation box 2.

[0020] like Figure 2 As shown, the control components arranged in the integrated installation box 2 of the control circuit in the frequency converter include an optical fiber adapter board 3, a power board 4, a power supply 5, a filter 6, a controller 7, a relay 8 and a terminal block 9. The optical fiber adapter board 3 and the power board 4 are located at one end of the integrated installation box 2, the relay 8 and the terminal block 9 are located at the other end of the integrated installation box 2, and the power supply 5, the filter 6 and the controller 7 are located in the middle of the integrated installation box 2.

[0021] The fiber optic adapter board 3 is used to distribute the optical fiber given by the controller 7, and the optical fiber is then connected to the power unit through the fiber optic adapter interface on the control unit panel 10 on the side of the integrated installation box 2; the power supply board 4 is used to transform and supply power to the fiber optic adapter board 3; the power supply 5 is used to supply power to other components of the integrated installation box 2, and suppress the EMI interference of the power supply 5 through the filter 6, and the power line reaches the power supply 5 after passing through the filter 6; the controller 7 is used to control the power circuit in the cabinet; the relay 8 and the terminal block 9 are used for internal and external signal line switching, which is convenient for plugging and unplugging.

[0022] Combination Figure 3 As shown, the control unit panel 10 is provided with a variety of interfaces, including a first optical fiber adapter interface 12, a high-voltage signal line adapter spring through-wall terminal 13, a first signal line adapter spring through-wall terminal 14, a power line through-wall terminal 16, a second signal line adapter spring through-wall terminal 17, a network port adapter interface 18 and a second optical fiber adapter interface 19. Furthermore, a handle 15 is also provided in the middle of the control unit panel to facilitate pulling or carrying the integrated installation box 2. Wherein:

[0023] The first optical fiber adapter port 12 and the second optical fiber adapter port 19 are connected to the optical fiber adapter board 3 .

[0024] The high-voltage signal line adapter spring wall-penetrating terminal 13 is used to connect the optical fiber adapter board 3 .

[0025] The first signal line transfer spring wall-through terminal 14 is used to connect to the controller 7 .

[0026] The second signal line transfer spring through-wall terminal 17 is used to connect the relay 8 and the terminal block 9 .

[0027] The power line wall terminal 16 is used to connect the power source 5.

[0028] The network port adapter interface 18 is used to connect to the controller 7 .

[0029] Furthermore, there will be certain differences in the components of different frequency conversion device control systems, and the panel interface and internal space layout of the integrated installation box can be customized according to the requirements.

[0030] The shell of the integrated installation box 2 of the control circuit in the inverter includes a controller housing 11 and a cover plate. The combination of the controller housing 11 and the cover plate is rectangular. The controller housing 11 is a rectangular shape lacking a panel. The cover plate constitutes a panel of the controller housing 11. Furthermore, a panel on the side of the controller housing 11 serves as a control unit panel 10.

[0031] The cover is buckled into the controller housing 11, flush with the controller housing 11, and is fixed by countersunk screw holes on both sides of the controller housing 11 and rivet nuts at corresponding positions of the cover. A limit position is processed on the inner side of the controller housing 11 to ensure that when the cover is embedded, it cannot continue to move downward after reaching a predetermined position.

[0032] The controller housing 11 and the cover are both made of Q235 carbon steel nickel-plated material, which has a certain degree of aesthetics and environmental protection capabilities, and has a strong electromagnetic shielding effect, reducing mutual interference between the power circuit and the control circuit, and improving the stability of the system.

[0033] Furthermore, when the integrated installation box 2 is inserted into the notch in the inverter control cabinet 1, there are installation rails on both sides of the notch, and the outer surface of the integrated installation box 2 has a handle 5, which is convenient for disassembling and assembling the integrated installation box, so that the hands have a place to grab, and there is a mounting piece at each end of the outer side of the integrated installation box. When inserted into the notch along the slide rail, the mounting piece and the cabinet are fixed, which plays a role in installing and limiting the integrated installation box 2. After the integrated installation box 2 is assembled as a whole outside, it can be installed in the inverter cabinet with the help of handles, rails and mounting pieces. The disassembly process is similar, which facilitates the installation and maintenance of the integrated installation box; at this time, the control unit panel is facing outward relative to the cabinet of the inverter control cabinet, which is convenient for plugging and unplugging the interface on the panel. And compared with the original solution of directly installing the control device in the cabinet, the external assembly of the integrated installation box 2 can be carried out in parallel with other work in the inverter cabinet, shortening the assembly period and improving the assembly efficiency.

[0034] The integrated installation box of the control circuit in the inverter has better layout and electromagnetic shielding effects through the design of the integrated installation box structure, and has a simple structure, is easy to use, easy to disassemble, and simple to maintain.

Claims

1. An integrated installation box for a control circuit in a frequency converter, characterized in that: The integrated installation box is installed inside the cabinet of the inverter control cabinet, and its interior is used to fix and install various control devices of the inverter control circuit. The external interface of each control device is reserved on the control unit panel of the integrated installation box, and the connection between each control device and the inverter power circuit is realized through the external interface.

2. The integrated installation box of the control circuit in the inverter according to claim 1, characterized in that: The control circuit comprises an optical fiber adapter board, and the optical fiber adapter board is connected to the optical fiber adapter interface of the control unit panel.

3. The integrated installation box of the control circuit in the frequency converter according to claim 1, characterized in that: The control circuit includes a power supply and a filter. The external power supply passes through the filter before reaching the power supply. The power supply is used to supply power to other components of the integrated installation box.

4. The integrated installation box of the control circuit in the frequency converter according to claim 2, characterized in that: The control unit panel includes a high-voltage signal line adapter spring through-wall terminal for connecting to a fiber optic adapter board.

5. The integrated installation box for the control circuit in the frequency converter according to claim 1, characterized in that: The control unit panel includes a signal line transfer spring through-wall terminal block for connecting a controller, a relay and a terminal block of a control circuit.

6. The integrated installation box for the control circuit in the frequency converter according to claim 1, characterized in that: The control unit panel includes a network port adapter interface for connecting to a controller of a control circuit.

7. The integrated installation box for the control circuit in the frequency converter according to claim 1, characterized in that: The shell of the integrated installation box includes a controller shell and a cover plate. The controller shell is a rectangular shape lacking a panel, and the panel is buckled by the cover plate. The combination of the controller shell and the cover plate forms a rectangle. Countersunk screw holes are provided on both sides of the controller shell lacking the panel, and rivet nuts are provided at corresponding positions of the cover plate.

8. The integrated installation box for the control circuit in the frequency converter according to claim 1, characterized in that: A handle is arranged in the middle of the control unit panel.

9. The integrated installation box for the control circuit in the frequency converter according to claim 1, characterized in that: The inverter control cabinet is provided with a slide rail at a location where the integrated installation box is installed.

10. The integrated installation box for the control circuit in the frequency converter according to claim 7, characterized in that: The controller housing and cover are made of Q235 carbon steel with nickel plating.

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