High-stability frequency converter

Abstract

The utility model relates to the technical field of frequency converters, in particular to a high-stability frequency converter, which comprises a box body, an IGBT (Insulated Gate Bipolar Translator) module, an electromagnetic relay and a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation grid plate and an active heat dissipation assembly; a mounting frame is arranged in the box body, the heat dissipation grid plate is arranged below the mounting frame, a mounting groove is formed in the mounting frame, and the IGBT module penetrates through the mounting groove and is arranged on the top wall of the heat dissipation grid plate; the battery relay is arranged on a mounting rack, the mounting rack is provided with a receding groove for a coil part of the electromagnetic relay to penetrate through, and the battery machine electric appliance penetrates through the receding groove and is located on one side of the heat dissipation grid plate. The electromagnetic relay has the advantages that failure caused by overheating after long-time work of the coil of the electromagnetic relay is reduced, and reliability is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of frequency converters, and in particular to a high-stability frequency converter. Background Technology

[0002] A frequency converter is a power control device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of the power supply. It provides the required power voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, frequency converters have many protection functions, such as overcurrent, overvoltage, and overload protection.

[0003] Our company has developed a convenient disassembly and maintenance inverter housing structure, including: a lower housing, in which a heat dissipation structure is housed, and a top shaft is provided inside the lower housing, with a threaded hole at the top of the top shaft; an upper housing, the bottom periphery of which is snapped onto the top of the lower housing, and the upper housing has a base plate threaded onto the top shaft; the periphery of the upper housing is provided with a snap-fit ​​opening, and a top cover is also included, with an elastic clip on the top cover that engages with the snap-fit ​​opening.

[0004] Regarding the aforementioned technologies, the inventors discovered that the coil of the switching relay in the frequency converter overheats after being powered on for a long time at high power, causing a decrease in magnetic attraction and resulting in the loss of frequency converter functionality. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a high-stability frequency converter, which has the advantage of reducing the occurrence of failures caused by overheating of electromagnetic relay coils after prolonged operation, thereby ensuring reliability.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A high-stability frequency converter includes a housing, an IGBT module, an electromagnetic relay, and a heat dissipation component;

[0008] The heat dissipation assembly includes a heat dissipation grid and an active heat dissipation assembly;

[0009] The housing is equipped with a mounting frame, the heat dissipation grid is located below the mounting frame, the mounting frame is provided with a mounting slot, and the IGBT module passes through the mounting slot and is mounted on the top wall of the heat dissipation grid.

[0010] The battery relay is mounted on a mounting bracket, which has a clearance groove for the electromagnetic relay coil to pass through. The battery electrical components pass through the clearance groove and are located on one side of the heat dissipation grid.

[0011] The above technical solution ensures that when electronic components of frequency converters such as IGBT modules are placed on the heat sink, the heat generated can be quickly transferred to the heat sink and dissipated through the active heat dissipation component, thereby preventing overheating of electronic components such as IGBT modules. When the active heat dissipation component actively dissipates heat from the heat sink, it first dissipates heat from the coil of the electromagnetic relay separately, thereby preventing the electromagnetic relay coil from overheating and failing after long-term operation, thus ensuring reliability.

[0012] As a preferred embodiment of this application, the heat dissipation grid is L-shaped, and the coil of the electromagnetic relay is disposed at the bend inside the heat dissipation grid.

[0013] The above technical solution enables the heat dissipation grid to quickly remove the heat generated by the coil of the electromagnetic relay under the action of the active heat dissipation component, preventing heat accumulation and ensuring heat dissipation effect; and the heat generated by the electromagnetic relay coil will not be transferred to the IGBT module and other frequency converter electronic components through the mounting plate, ensuring the safety and reliability of other electronic components.

[0014] As a preferred embodiment of this application, the active heat dissipation component includes a bracket disposed between the mounting frame and the bottom plate of the housing, a cooling fan disposed on the bracket, and a heat dissipation mesh disposed on the housing.

[0015] The above technical solution achieves the goal of using a cooling fan as a heat dissipation air source to quickly blow away the heat dissipation grid, thereby allowing the heat generated by the heat dissipation grid and the coil of the electromagnetic relay to be quickly discharged from the heat dissipation mesh, thus ensuring the heat dissipation effect.

[0016] As a preferred embodiment of this application, the heat dissipation grid includes a base plate for mounting the IGBT module, and the base plate is provided with a plurality of heat dissipation plates.

[0017] To achieve the above technical solution, both the base plate and the heat sink are made of aluminum plates as a single piece, which increases the heat dissipation area and heat transfer efficiency, thereby ensuring the heat dissipation effect.

[0018] As a preferred embodiment of this application, the housing includes a bottom shell and a cover plate, and a pair of L-shaped feet are detachably connected to the bottom of the bottom shell, with mounting holes provided on the L-shaped feet.

[0019] By implementing the above technical solution, if the inverter enclosure is damaged during transportation, only the L-shaped feet need to be replaced to ensure subsequent installation.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Even if the electronic components of the frequency converter, such as the IGBT module, are placed on the heat sink, the heat generated can be quickly transferred to the heat sink and dissipated through the active cooling component, thereby preventing the electronic components of the frequency converter, such as the IGBT module, from overheating; when the active cooling component actively cools the heat sink, it will first cool the coil of the electromagnetic relay separately, thereby preventing the electromagnetic relay coil from overheating and failing after long-term operation, thus ensuring reliability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a high-stability frequency converter according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the internal structure of the box according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the heat dissipation component in an embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the structure of the heat dissipation grid in the embodiments of this application.

[0027] Reference numerals: 1. Enclosure; 11. Bottom shell; 12. Cover plate; 13. L-shaped foot plate; 2. IGBT module; 3. Electromagnetic relay; 4. Heat dissipation grille; 41. Base plate; 42. Heat dissipation plate; 5. Active heat dissipation assembly; 51. Bracket; 52. Cooling fan; 53. Heat dissipation mesh; 6. Mounting bracket; 61. Mounting slot; 62. Clearance slot. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a high-stability frequency converter. (Refer to...) Figure 1The high-stability frequency converter includes a housing 1, an IGBT module 2, an electromagnetic relay 3, and a heat dissipation assembly. The heat dissipation assembly includes a heat dissipation grid 4 and an active heat dissipation assembly 5. A mounting bracket 6 is provided inside the housing 1, and the heat dissipation grid 4 is located below the mounting bracket 6. The mounting bracket 6 is provided with a mounting groove 61, through which the IGBT module 2 passes and is mounted on the top wall of the heat dissipation grid 4. This ensures that the electronic components of the frequency converter, such as the IGBT module 2, are mounted on the heat dissipation grid 4, and the heat generated can be quickly transferred to the heat dissipation grid 4 and dissipated through the active heat dissipation assembly 5, thereby preventing the electronic components of the frequency converter, such as the IGBT module 2, from overheating.

[0030] The battery relay is mounted on a mounting bracket 6, which has a clearance groove 62 for the coil of the electromagnetic relay 3 to pass through. The coil of the electromagnetic relay 3 passes through the clearance groove 62 and is located on one side of the heat sink 4. This allows the active cooling assembly 5 to cool the heat sink 4 first, prioritizing the coil of the electromagnetic relay 3, thus preventing overheating and failure after prolonged operation and ensuring reliability. The heat sink 4 is L-shaped, with the coil of the electromagnetic relay 3 located at a bend within the heat sink 4. This allows the heat sink 4 to quickly dissipate the heat generated by the coil of the electromagnetic relay 3 under the action of the active cooling assembly 5, preventing heat buildup and ensuring effective heat dissipation. Furthermore, the heat generated by the coil of the electromagnetic relay 3 will not be transferred to other inverter electronic components such as the IGBT module 2 through the mounting plate, ensuring the safety and reliability of other electronic components.

[0031] The active heat dissipation component 5 includes a bracket 51 disposed between the mounting frame 6 and the bottom plate 41 of the housing 1. A cooling fan 52 is disposed on the bracket 51, and a heat dissipation mesh 53 is disposed on the housing 1. The cooling fan 52 serves as a heat dissipation air source, quickly blowing the heat dissipation grid 4, thereby allowing the heat generated by the heat dissipation grid 4 and the coil of the electromagnetic relay 3 to be quickly discharged through the heat dissipation mesh 53, thus ensuring the heat dissipation effect.

[0032] The heat dissipation grid 4 includes a base plate 41 for mounting the IGBT module 2. Several heat dissipation plates 42 are provided on the base plate 41. Both the base plate 41 and the heat dissipation plates 42 are made of aluminum plates in one piece, which improves the heat dissipation area and heat transfer efficiency, thereby ensuring the heat dissipation effect.

[0033] The enclosure 1 includes a bottom shell 11 and a cover plate 12. A pair of L-shaped feet 13 are detachably connected to the bottom of the bottom shell 11, and the L-shaped feet 13 are provided with mounting holes. This ensures that if the enclosure 1 is damaged during transportation, only the L-shaped feet 13 need to be replaced to ensure subsequent installation.

[0034] The implementation principle of a high-stability frequency converter in this application embodiment is as follows: after the electronic components of the frequency converter, such as the IGBT module 2, are placed on the heat sink 4, the heat generated can be quickly transferred to the heat sink 4 and discharged through the active heat dissipation component 5, thereby preventing the electronic components of the frequency converter, such as the IGBT module 2, from overheating; when the active heat dissipation component 5 actively dissipates heat from the heat sink 4, it will first dissipate heat from the coil of the electromagnetic relay 3 separately, thereby preventing the electromagnetic relay 3 coil from overheating and failing after working for a long time, thus ensuring reliability.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-stability frequency converter, characterized in that: It includes a housing (1), an IGBT module (2), an electromagnetic relay (3), and a heat dissipation assembly; The heat dissipation assembly includes a heat dissipation grid (4) and an active heat dissipation assembly (5); The housing (1) is provided with a mounting bracket (6), the heat dissipation grid (4) is provided below the mounting bracket (6), the mounting bracket (6) is provided with a mounting groove (61), and the IGBT module (2) passes through the mounting groove (61) and is mounted on the top wall of the heat dissipation grid (4); The electromagnetic relay is mounted on a mounting bracket (6), and the mounting bracket (6) is provided with a clearance groove (62) through which the coil portion of the electromagnetic relay (3) passes. The electromagnetic relay passes through the clearance groove (62) and is located on one side of the heat dissipation grid plate (4).

2. The high-stability frequency converter according to claim 1, characterized in that: The heat dissipation grid is L-shaped, and the coil of the electromagnetic relay (3) is located at the bend inside the heat dissipation grid (4).

3. The high-stability frequency converter according to claim 1, characterized in that: The active heat dissipation component (5) includes a bracket (51) disposed between the mounting frame (6) and the bottom plate (41) of the housing (1), a cooling fan (52) is disposed on the bracket (51), and a heat dissipation mesh (53) is disposed on the housing (1).

4. A high-stability frequency converter according to claim 1, characterized in that: The heat dissipation grid (4) includes a base plate (41) for mounting the IGBT module (2), and a plurality of heat dissipation plates (42) are provided on the base plate (41).

5. A high-stability frequency converter according to claim 1, characterized in that: The housing (1) includes a bottom shell (11) and a cover plate (12). The bottom of the bottom shell (11) is detachably connected to a pair of L-shaped feet (13), and the L-shaped feet (13) are provided with mounting holes.

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