Frequency converter

Abstract

The utility model discloses a frequency converter, which comprises a case, a reactor, a resistor assembly, a radiator, a functional assembly and a control assembly, a bottom plate, a first mounting plate and a second mounting plate are sequentially arranged at intervals from bottom to top in the height direction of the case; the reactor and the resistor assembly are arranged on the bottom plate at intervals along the length direction of the case; the radiator is arranged on the side, facing the bottom plate, of the first mounting plate. The functional assembly is arranged on the first mounting plate; the control assembly is arranged on the side, away from the first mounting plate, of the second mounting plate. According to the technical scheme, the width size of the frequency converter can be reduced, the width space occupied by installation is reduced, the whole frequency converter is designed in a book narrow shape, and the power density of the frequency converter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a frequency converter. Background Art

[0002] With the continuous improvement of industrial automation, electrical components are also becoming more and more miniaturized. For example, the inverter, which uses frequency conversion technology and microelectronics technology to control the power control equipment of AC motors by changing the working power frequency of the motor, is also developing in a miniaturized trend.

[0003] However, the overall structure of the inverter in the related art is usually a flat structure, which is usually not easy to compress in width, resulting in a large width dimension and occupying more installation space. Utility Model Content

[0004] The main purpose of the utility model is to provide a frequency converter, aiming at rationally arranging the structure and reducing the width of the frequency converter.

[0005] In order to achieve the above object, the utility model provides a frequency converter, comprising:

[0006] Chassis; in the height direction of the chassis, a bottom plate, a first mounting plate and a second mounting plate are sequentially arranged from bottom to top;

[0007] Reactors and resistor components are installed on the bottom plate at intervals along the length direction of the chassis;

[0008] A radiator, arranged on a side of the first mounting plate facing the bottom plate;

[0009] a functional component, disposed on the first mounting plate; and

[0010] The control component is arranged on a side of the second mounting plate facing away from the first mounting plate.

[0011] In one embodiment of the present application, the functional component includes a rectifier module, an inverter module and a capacitor module, and the rectifier module, the inverter module and the capacitor module are distributed on the first mounting plate at intervals along the length direction of the chassis;

[0012] The capacitor module extends from the first mounting plate toward the bottom plate and is spaced apart from the heat sink in the length direction of the chassis.

[0013] In one embodiment of the present application, the frequency converter further includes a copper busbar assembly electrically connected to the rectifier module, the inverter module and the capacitor module, and the copper busbar assembly is located above the capacitor module and the inverter module;

[0014] The second mounting plate is arranged above the rectifier module, and the control assembly and the copper busbar assembly are spaced apart and distributed in the length direction of the chassis.

[0015] In one embodiment of the present application, the copper busbar assembly includes an outgoing line module and an incoming line module distributed in a stepped manner, and the outgoing line module is higher than the incoming line module; in the length direction of the chassis, the incoming line module is located on the side of the outgoing line module away from the second mounting plate.

[0016] In one embodiment of the present application, the control component includes:

[0017] A driving plate, mounted on the second mounting plate;

[0018] a power supply support frame, mounted on the second mounting plate and staggered with the driving plate in a height direction; and

[0019] A driving power supply is installed on the power supply support frame.

[0020] In one embodiment of the present application, the control component further includes:

[0021] a control board support plate, mounted on the second mounting plate and located above the drive board and the power supply support frame; and

[0022] The control panel is arranged on the control panel support plate.

[0023] In one embodiment of the present application, the control board support plate is provided with a avoidance opening corresponding to the driving power supply, and the driving power supply part is passed through the avoidance opening;

[0024] The control panel support plate is provided with a power supply protection cover at the avoidance opening.

[0025] In one embodiment of the present application, a heat dissipation duct is formed between the bottom plate and the first mounting plate, the heat dissipation duct extends along the length direction of the chassis, and the radiator is located in the heat dissipation duct;

[0026] The chassis is provided with a fan installation opening and ventilation holes connected to the heat dissipation air duct, and a fan is provided at the fan installation opening.

[0027] In one embodiment of the present application, an air guide cover is provided on the bottom plate, and the air guide cover is provided on the reactor;

[0028] The air guide cover is provided with heat dissipation holes, and / or the air guide cover is provided with a line outlet for the line outlet of the reactor.

[0029] In one embodiment of the present application, the chassis includes a box body and a cover body, and the cover body is movably connected to the box body;

[0030] The bottom plate, the first mounting plate and the second mounting plate are arranged at intervals on the inner side of the box from bottom to top.

[0031] In one embodiment of the present application, the cover body is hinged to the box body, and the box body is provided with a sealing strip at the hinge.

[0032] In the inverter of the utility model technical solution, a base plate, a first mounting plate and a second mounting plate are sequentially arranged from bottom to top in the height direction of the chassis, and the reactor and the resistor assembly are installed on the base plate at intervals along the length direction of the chassis. The radiator is arranged on the side of the first mounting plate facing the base plate, the functional assembly is arranged on the first mounting plate, and the control assembly is installed on the side of the second mounting plate away from the first mounting plate, so that the internal components of the inverter are arranged in layers in the height direction. Compared with the horizontal tiling method, the width dimension of the inverter can be reduced, the width space occupied by the installation can be reduced, the overall design is a book-like narrow body, and the power density of the inverter is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 This is a schematic diagram of the appearance structure of an embodiment of the frequency converter of the utility model;

[0035] Figure 2 This is a schematic diagram of the exploded structure of the frequency converter of the utility model from one perspective;

[0036] Figure 3 This is a schematic diagram of the exploded structure of the frequency converter of the utility model from another perspective;

[0037] Figure 4 This is a schematic diagram of the structure behind the hidden cover, control panel support plate and control panel in the embodiment of the utility model;

[0038] Figure 5 This is a schematic diagram of the structure after the cover is hidden in the embodiment of the utility model;

[0039] Figure 6 for Figure 4 Side view in;

[0040] Figure 7 This is a schematic diagram of the matching structure of the box, the reactor, the resistor assembly and the air guide cover in the embodiment of the utility model;

[0041] Figure 8It is a schematic diagram of the matching structure of the box body, the air guide cover, the radiator, the first mounting plate and the functional components in the embodiment of the utility model.

[0042] Description of Figure Numbers:

[0043] Label name Label name 1 Chassis 53 Capacitor Module 11 Cabinet 61 Driver board 101 Opening 62 Power supply support 102 Ventilation holes 63 Driving power 103 Fan mounting port 64 Control panel support plate 111 Base Plate 65 Control Panel 12 Cover 66 Power supply protection cover 13 Sealing strip 7 Copper busbar assembly 21 First mounting plate 71 Outlet module 22 Second mounting plate 72 Inlet module 31 Reactor 8 Air guide cover 32 Resistor components 81 Bend section 4 heat sink 82 Body 5 Functional Components 801 Cooling holes 51 Rectifier module 802 Outlet 52 Inverter module 9 fan

[0044] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0049] The utility model provides a frequency converter, which aims to reduce the width of the frequency converter and the width space occupied by the installation by reasonably arranging the internal components of the frequency converter from bottom to top along the height direction of the chassis 1, so as to improve the power density by presenting a narrow book-like design as a whole.

[0050] In the embodiment of the present utility model, Figures 1 to 3 as well as Figure 7 As shown, the frequency converter includes a chassis 1, a reactor 31 and a resistor component 32, a heat sink 4, a functional component 5 and a control component.

[0051] In the height direction of the chassis 1, a base plate 111, a first mounting plate 21 and a second mounting plate 22 are arranged in sequence from bottom to top; the inductor 31 and the resistor component 32 are installed on the base plate 111 at intervals along the length direction of the chassis 1; the radiator 4 is arranged on the side of the first mounting plate 21 facing the base plate 111; the functional component 5 is arranged on the first mounting plate 21; and the control component is arranged on the side of the second mounting plate 22 away from the first mounting plate 21.

[0052] The chassis 1 plays a protective role for the internal components. The chassis 1 can effectively prevent external dust, moisture, corrosion and other substances from invading the internal components and circuits, thereby protecting their normal operation. A bottom plate 111, a first mounting plate 21 and a second mounting plate 22 are sequentially spaced apart in the height direction of the chassis 1. It can be understood that the bottom plate 111 can be the bottom plate structure of the chassis 1 itself or can be a bottom plate structure installed separately at the bottom of the chassis 1; the first mounting plate 21 is spaced apart above the bottom plate 111 and can be fixed to the chassis 1 by screw locking, snap connection or welding; the second mounting plate 22 is spaced apart above the first mounting plate 21 and can be fixed to the chassis 1 by screw locking, snap connection or welding.

[0053] In actual application, the weight of the reactor 31 is greater than that of other components (such as the functional component 5 and the control component). By arranging the reactor 31 and the resistor component 32 at intervals on the bottom plate 111 along the length direction of the chassis 1, the center of gravity of the inverter can be lowered to make the inverter structure more stable, and the support strength requirements for the first mounting plate 21 or the second mounting plate 22 can be reduced, thereby reducing the difficulty of assembly. The reactor 31 and the resistor component 32 are arranged at intervals in the length direction of the chassis 1, which can reduce the width dimension of the bottom plate 111.

[0054] The heat sink 4 is mounted on the side of the first mounting plate 21 facing the bottom plate 111, and the functional component 5 is arranged on the first mounting plate 21, so that the heat generated by the functional component 5 can be quickly transferred to between the first mounting plate 21 and the bottom plate 111 through the heat sink 4, and the functional component 5 is dissipated. The heat dissipation method can be that the chassis 1 is provided with heat dissipation holes, and the heat generated by the functional component 5, the reactor 31 and the resistor component 32 can be discharged from the chassis 1 through the heat dissipation holes. At the same time, the functional component 5 is arranged in the upper area of ​​the reactor 31 and the resistor component 32, which can facilitate wiring. Optionally, the functional component 5 may include components such as a rectifier module 51, an inverter module 52, and a capacitor module 53.

[0055] The control component is used to control the working state of the frequency converter and the output frequency, voltage, etc. The control component is arranged on the side of the second mounting plate 22 away from the first mounting plate 21, and the control component is located above the functional component 5, which is more convenient for wiring and electrical connection between the two. Optionally, the control component may include components such as a drive board 61 and a control board 65.

[0056] In the inverter of the utility model technical solution, the bottom plate 111, the first mounting plate 21 and the second mounting plate 22 are sequentially arranged from bottom to top in the height direction of the chassis 1, and the inductor 31 and the resistor component 32 are installed on the bottom plate 111 at intervals along the length direction of the chassis 1. The radiator 4 is arranged on the side of the first mounting plate 21 facing the bottom plate 111, the functional component 5 is arranged on the first mounting plate 21, and the control component is installed on the side of the second mounting plate 22 away from the first mounting plate 21, so that the internal components of the inverter are arranged in layers in the height direction. Compared with the horizontal tiling method, the width dimension of the inverter can be reduced, the width space occupied by the installation can be reduced, the overall design is a book-like narrow body, and the power density of the inverter is improved.

[0057] In one embodiment of the present application, Figure 2 , Figure 3 , Figure 6 as well as Figure 8 The functional component 5 includes a rectifier module 51, an inverter module 52 and a capacitor module 53. The rectifier module 51, the inverter module 52 and the capacitor module 53 are spaced apart on the first mounting plate 21 along the length direction of the chassis 1; the capacitor module 53 extends from the first mounting plate 21 toward the bottom plate 111 and is spaced apart from the radiator 4 in the length direction of the chassis 1.

[0058] The rectifier module 51 is used to convert AC power into DC power, and the inverter module 52 is used to convert DC power into AC power. In this embodiment, the rectifier module 51, the inverter module 52 and the capacitor module 53 are distributed on the first mounting plate 21 along the length direction of the chassis 1, which can reduce the width of the inverter and also reduce the height.

[0059] In practical application, considering that the height of the capacitor module 53 is higher than that of the rectifier module 51 and the inverter module 52, part of the capacitor module 53 can be extended from the first mounting plate 21 toward the bottom plate 111, and spaced apart from the heat sink 4 in the length direction of the chassis 1, so as to make full use of the space between the first mounting plate 21 and the bottom plate 111, making the structural layout more compact, and also being able to quickly dissipate the heat generated by the capacitor module 53. Optionally, the capacitor module 53 corresponds to the resistor assembly 32.

[0060] In one embodiment of the present application, Figure 2 , Figure 3 , Figure 6 as well as Figure 8 The inverter also includes a copper busbar assembly 7 electrically connected to the rectifier module 51, the inverter module 52 and the capacitor module 53, and the copper busbar assembly 7 is located above the capacitor module 53 and the inverter module 52; the second mounting plate 22 is arranged above the rectifier module 51, and the control component and the copper busbar assembly 7 are spaced apart in the length direction of the chassis 1.

[0061] In this embodiment, a copper bar assembly 7 electrically connected to the rectifier module 51, the inverter module 52 and the capacitor module 53 is provided for easy wiring. The copper bar assembly 7 is located above the capacitor module 53 and the inverter module 52, and a mounting cavity is formed above the rectifier module 51. By installing the second mounting plate 22 in this mounting cavity, the second mounting plate 22 and the control assembly can be spaced apart from the copper bar assembly 7 in the length direction of the chassis 1. It can be understood that the second mounting plate 22 and the control assembly are at approximately the same height position as the copper bar assembly 7 inside the chassis 1. Such a setting can make full use of the installation space above the functional component 5 in the chassis 1 without occupying additional width space, further improving the compactness of the structural layout.

[0062] As an example, Figures 2 to 4 The copper busbar assembly 7 includes an outlet module 71 and an inlet module 72 which are distributed in a stepped manner, and the outlet module 71 is higher than the inlet module 72 ; in the length direction of the chassis 1 , the inlet module 72 is located on the side of the outlet module 71 away from the second mounting plate 22 .

[0063] In this embodiment, when the distance between the second mounting plate 22 and the chassis 1 in the length direction is constant, the outgoing line module 71 and the incoming line module 72 are distributed in a stepped manner, and the outgoing line module 71 is higher than the incoming line module 72, so that the width and length dimensions are not increased, and wiring is also facilitated, thereby improving assembly wiring efficiency. In addition, in the length direction of the chassis 1, the incoming line module 72 is located on the side of the outgoing line module 71 away from the second mounting plate 22, so that the outgoing line module 71 at a higher position is closer to the middle position than the incoming line module 72 at a lower position, and the wiring terminal at the middle position of the wall can be blocked, so that the wiring convenience can be further improved.

[0064] In one embodiment of the present application, Figures 2 to 5 The control component includes a driving board 61, a power supply support frame 62 and a driving power supply 63; the driving board 61 is installed on the second mounting plate 22; the power supply support frame 62 is installed on the second mounting plate 22 and is staggered with the driving board 61 in the height direction; the driving power supply 63 is installed on the side of the power supply support frame 62 away from the second mounting plate 22.

[0065] This embodiment illustrates the layout of the control components, in which the driving plate 61 is installed above the second mounting plate 22, and the power supply support frame 62 is arranged on the second mounting plate 22 to elevate the driving power supply 63. Compared with the method of laying the driving power supply 63 and the driving plate 61 flat, the width occupied size is reduced and the space utilization rate is improved.

[0066] Optionally, the power supply support frame 62 can be fixedly mounted on the second mounting plate 22 by screw locking or welding.

[0067] Furthermore, if Figures 2 to 5 The control assembly also includes a control board support plate 64 and a control board 65. The control board support plate 64 is installed on the second mounting plate 22 and is located above the drive board 61 and the power supply support frame 62; the control board 65 is arranged on the side of the control board support plate 64 away from the drive board 61.

[0068] It can be understood that the control board 65 is installed on the control board support plate 64, and the control board support plate 64 can raise the control board 65 relative to the driving board 61. Compared with the method of laying it flat with the driving board 61, it can reduce the width occupied by the size and further improve the space utilization.

[0069] Optionally, the control board support plate 64 can be fixedly mounted on the second mounting plate 22 by screw locking or welding.

[0070] In practical application, considering that the driving power source 63 has a certain height, in one embodiment, as Figures 2 to 5 The control board support plate 64 is provided with an avoidance opening corresponding to the driving power supply 63, and the driving power supply 63 is partially passed through the avoidance opening; the control board support plate 64 is provided with a power supply protective cover 66 at the avoidance opening.

[0071] Such arrangement can avoid the frequency converter height being too high, making the size of the frequency converter more miniaturized. In addition, by arranging the power supply protection cover 66 to be covered on the driving power supply 63, it is possible to avoid the driving power supply 63 being polluted by external dust impurities.

[0072] Optionally, the power supply protection cover 66 can be fixedly mounted on the control board support plate 64 by screw locking or welding.

[0073] In one embodiment of the present application, Figures 1 to 3 as well as Figure 8 A heat dissipation duct is formed between the bottom plate 111 and the first mounting plate 21, the heat dissipation duct extends along the length direction of the chassis 1, and the radiator 4 is located in the heat dissipation duct; the chassis 1 is provided with a fan mounting port 103 and a ventilation hole 102 connected to the heat dissipation duct on both sides in the length direction, and a fan 9 is provided at the fan mounting port 103.

[0074] In this embodiment, a heat dissipation duct is formed between the first mounting plate 21 and the base plate 111, and the inductor 31, the resistor assembly 32 and the radiator 4 are all located in the heat dissipation duct. The heat generated by the functional component 5 can be dissipated into the heat dissipation duct through the radiator 4, and the heat generated by the inductor 31 and the resistor assembly 32 is also dissipated into the heat dissipation duct. By arranging a fan 9 and ventilation holes 102 on the chassis 1, gas circulation is achieved, which can accelerate heat dissipation and improve heat dissipation efficiency.

[0075] Optionally, the fan 9 can be installed at the fan installation opening 103 by screw locking or snap fixing.

[0076] In one embodiment of the present application, Figure 7 and Figure 8 The bottom plate 111 is provided with an air guide cover 8, and the air guide cover 8 is provided on the reactor 31; the air guide cover 8 is provided with a heat dissipation hole 801 connected to the heat dissipation air duct.

[0077] By setting the air guide cover 8 on the reactor 31, the reactor 31 can be protected to prevent dust or foreign matter from contaminating the reactor 31. The air guide cover 8 is provided with heat dissipation holes 801, which can be round holes, square holes or strip holes, etc., so that the heat of the reactor 31 can enter the heat dissipation air duct through the heat dissipation holes 801, thereby enhancing the heat dissipation of the reactor 31.

[0078] In one embodiment, the air guide cover 8 is provided with a wire outlet 802 for the wires of the reactor 31. Optionally, the wire outlet 802 may be a round hole, a square hole or a strip hole.

[0079] As an example, Figure 7 The air guide 8 is bent at both sides of the length direction of the chassis 1 to form a bent section 81 and a main section 82 connected to the two bent sections 81. The bent section 81 extends to the wall of the chassis 1 along the width direction of the chassis 1. The two bent sections 81 extend to be fixedly connected to the bottom plate 111. Optionally, the radiator 4 is connected to the main section 82, and the bent section 81 plays a role in guiding the gas, which can guide the wind of the fan 9 to the radiator 4, accelerate the heat dissipation of the radiator 4, and further improve the heat dissipation efficiency.

[0080] In one embodiment of the present application, Figures 1 to 3 The chassis 1 includes a box body 11 and a cover body 12. The box body 11 is provided with an opening 101. The cover body 12 is movably connected to the box body 11 for opening or closing the opening 101. The bottom plate 111, the first mounting plate 21 and the second mounting plate 22 are installed on the inner side of the box body 11 from bottom to top.

[0081] In this embodiment, the cover body 12 is movably connected to the box body 11, so that the installation, maintenance and repair of the internal components of the inverter can be facilitated.

[0082] Optionally, the box body 11 is a metal sheet that is integrally stamped or welded in sections. The overall structural strength is high and the protection effect on the inverter is good. During installation, the inductor 31 and the resistor component 32 are fixed to the bottom plate 111 of the box body 11 by screws, and then the first mounting plate 21 and the second mounting plate 22 as well as the radiator 4, the functional component 5, the control component, etc. are installed, and finally the cover body 12 is covered.

[0083] Optionally, the chassis 1 is entirely made of sheet metal.

[0084] Furthermore, if Figures 1 to 3 The cover 12 is provided with an operation panel, and is electrically connected to the control assembly. The operation panel has a display screen, which can display relevant data for user convenience.

[0085] Furthermore, the cover 12 is hinged to the box body 11. Compared with the traditional detachable cover 12, this solution does not need to remove the cover 12, which is convenient for maintenance.

[0086] In one embodiment, if Figures 1 to 3 The box body 11 is provided with a sealing strip 13 at the hinge to prevent dust and impurities from entering due to a large gap between the cover body 12 and the box body 11.

[0087] Optionally, the sealing strip 13 extends along the length direction of the box body 11. The sealing strip 13 may be an "L"-shaped strip structure.

[0088] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A frequency converter, characterized in that: include: Chassis; In the height direction of the chassis, a bottom plate, a first mounting plate and a second mounting plate are sequentially arranged from bottom to top; Reactors and resistor components are installed on the bottom plate at intervals along the length direction of the chassis; A radiator, arranged on a side of the first mounting plate facing the bottom plate; A functional component, arranged on the first mounting plate; as well as The control component is arranged on a side of the second mounting plate facing away from the first mounting plate.

2. The frequency converter according to claim 1, characterized in that: The functional components include a rectifier module, an inverter module and a capacitor module, and the rectifier module, the inverter module and the capacitor module are distributed on the first mounting plate at intervals along the length direction of the chassis; The capacitor module extends from the first mounting plate toward the bottom plate and is spaced apart from the heat sink in the length direction of the chassis.

3. The frequency converter according to claim 2, characterized in that: The frequency converter further comprises a copper busbar assembly electrically connected to the rectifier module, the inverter module and the capacitor module, wherein the copper busbar assembly is located above the capacitor module and the inverter module; The second mounting plate is arranged above the rectifier module, and the control assembly and the copper busbar assembly are spaced apart and distributed in the length direction of the chassis.

4. The frequency converter according to claim 3, characterized in that: The copper busbar assembly includes an outlet module and an inlet module which are distributed in a stepped manner, wherein the outlet module is higher than the inlet module; in the length direction of the chassis, the inlet module is located on a side of the outlet module away from the second mounting plate.

5. The frequency converter according to any one of claims 1 to 4, characterized in that: The control component comprises: A driving plate, mounted on the second mounting plate; a power supply support frame, mounted on the second mounting plate and staggered with the driving plate in a height direction; and A driving power supply is installed on the power supply support frame.

6. The frequency converter according to claim 5, characterized in that: The control component also includes: a control board support plate, mounted on the second mounting plate and located above the drive board and the power supply support frame; and The control panel is arranged on the control panel support plate.

7. The frequency converter according to claim 6, characterized in that: The control panel support plate is provided with an avoidance opening, and the driving power supply part is arranged through the avoidance opening; The control panel support plate is provided with a power supply protection cover at the avoidance opening.

8. The frequency converter according to any one of claims 1 to 4, characterized in that: A heat dissipation duct extending along the length direction of the chassis is formed between the bottom plate and the first mounting plate, and the radiator is located in the heat dissipation duct; The chassis is provided with a fan installation opening and ventilation holes connected to the heat dissipation air duct, and a fan is provided at the fan installation opening.

9. The frequency converter according to claim 8, characterized in that: The bottom plate is provided with an air guide cover, and the air guide cover is arranged on the reactor; The air guide cover is provided with heat dissipation holes, and / or the air guide cover is provided with a line outlet for the line outlet of the reactor.

10. The frequency converter according to any one of claims 1 to 4, characterized in that: The chassis comprises a box body and a cover body, and the cover body is movably connected to the box body; The bottom plate, the first mounting plate and the second mounting plate are arranged at intervals on the inner side of the box from bottom to top.

11. The frequency converter according to claim 10, characterized in that: The cover body is hinged to the box body, and a sealing strip is provided at the hinge of the box body.

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