Frequency converter

Abstract

The utility model provides a frequency converter. The frequency converter comprises a shell, a power assembly and a driving assembly. The power assembly and the driving assembly are both installed in the shell. The power assembly comprises a power circuit board and a filter inductor, and the filter inductor is electrically connected to the power circuit board; and the filter inductor generates heat during working. The driving assembly comprises a driving circuit board and a bus capacitor, the bus capacitor is connected to the driving circuit board, and the driving circuit board is electrically connected with the power circuit board; when the bus capacitor works, the heat is released along with the bus capacitor. Therefore, two main heat release elements, namely the filter inductor and the bus capacitor, are arranged on the same side of the power circuit board and face the same end of the shell, so that the heat release elements are arranged in a centralized manner, and heat management and effective heat dissipation in the frequency converter are facilitated. According to the arrangement method, the power circuit board and the driving circuit board can be more tightly attached, so that the space occupied by the power assembly and the driving assembly in the shell is reduced, and the space utilization rate is increased.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and more specifically, relates to a frequency converter. Background Art

[0002] In the field of power transmission and control, the inverter is an electric control device that integrates frequency conversion technology and microelectronics technology. Its core function is to control the speed and operating characteristics of the AC motor by adjusting the frequency of the motor's working power supply. It is widely used in industrial automation, mechanical manufacturing, energy management and other fields.

[0003] Because VFDs integrate a large number of electronic components, an improper layout of these components can result in a loose, uncompact structure, leading to poor space utilization. Within limited installation space, this not only increases the size and weight of the device but also limits its flexibility in specific scenarios. Furthermore, the scattered distribution of components requires significant time and effort to assemble and operate, reducing production efficiency. More importantly, an improper layout can negatively impact the VFD's heat dissipation performance. VFDs generate significant heat during operation. If heat cannot be dissipated promptly and effectively, internal temperatures rise, impacting the performance, stability, and service life of the electronic components. Heat dissipation issues are particularly prominent under high-power, long-duration operating conditions. Improper component layout often hinders effective heat dissipation, leading to heat accumulation and, in severe cases, even triggering overheating or damage to the device. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a frequency converter to solve the technical problem of unreasonable structure layout of frequency converter components existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is:

[0006] Provided is a frequency converter, comprising:

[0007] case;

[0008] A power component is installed in the housing, the power component includes a power circuit board and a filter inductor, and the filter inductor is electrically connected to the power circuit board;

[0009] A drive assembly is installed in the housing, the drive assembly includes a drive circuit board and a bus capacitor, the bus capacitor is connected to the drive circuit board, and the drive circuit board is electrically connected to the power circuit board;

[0010] The filter inductor and the bus capacitor are both located on the same side of the power circuit board and face the same end of the housing.

[0011] As a further improvement of the above technical solution:

[0012] Optionally, the shell further comprises a partition installed in the shell, the partition dividing the cavity in the shell into a front cavity and a rear cavity; the partition has a plurality of through holes;

[0013] Optionally, the power circuit board is placed in the front end cavity, and the filter inductor passes through the first through hole on the partition and extends to the rear end cavity; the drive circuit board is placed in the front end cavity, and the bus capacitor passes through the second through hole on the partition and extends to the rear end cavity.

[0014] Optionally, the frequency converter includes an inverter assembly, which is mounted on the partition and electrically connected to the power circuit board; the heat dissipation end of the inverter assembly extends to the rear end cavity.

[0015] Optionally, the inverter includes a rectifier assembly, which includes a rectifier and a second heat sink, the rectifier is connected to the second heat sink and electrically connected to the power circuit board; the second heat sink is installed on the partition and extends the heat dissipation end to the rear end cavity.

[0016] Optionally, the inverter includes an interactive control component, which includes an interactive panel, a control mounting board and a control circuit board. The interactive panel is installed on the front panel of the shell, the control mounting board is connected to the inner wall of the front cavity, and the control circuit board is installed on the control mounting board and is signal-connected to the power circuit board.

[0017] Optionally, a heat dissipation opening is provided on the top surface of the rear end cavity, and a heat dissipation component is installed on the heat dissipation opening.

[0018] Optionally, the heat dissipation assembly includes a heat dissipation fan and a fan mounting plate, the fan mounting plate is connected to the rear end cavity, the heat dissipation fan is mounted on the fan mounting plate, and is electrically connected to the control circuit board.

[0019] Optionally, each through hole of the partition is further provided with a dust cover, and the dust cover is used to seal the gap between the through hole and the device passing through the through hole.

[0020] Optionally, the power circuit board is provided with a main circuit terminal, and the main circuit terminal is used for inputting / outputting electrical signals.

[0021] Optionally, a wire threading hole is further provided on the shell, and the wire threading hole faces the main circuit terminal.

[0022] The beneficial effects of the frequency converter provided by this application are:

[0023] The frequency converter provided in the present application includes a housing, a power assembly and a drive assembly. The housing serves as the main frame of the frequency converter. The power assembly and the drive assembly are both installed in the housing. The power assembly includes a power circuit board and a filter inductor, and the filter inductor is electrically connected to the power circuit board; the filter inductor generates heat during operation. The drive assembly includes a drive circuit board and a bus capacitor, and the bus capacitor is connected to the drive circuit board, and the drive circuit board is electrically connected to the power circuit board; the bus capacitor also releases heat during operation. Therefore, the two main heat-releasing components, the filter inductor and the bus capacitor, are arranged on the same side of the power circuit board and both face the same end of the housing, so as to centrally arrange the heat-releasing components, which is convenient for heat management and effective heat dissipation in the frequency converter. This arrangement method can also make the power circuit board and the drive circuit board closer together, so as to reduce the space occupied by the power assembly and the drive assembly inside the housing and improve space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 Schematic diagram of the decomposed structure of the inverter provided in this application;

[0026] Figure 2 This is a schematic diagram of the partially enlarged structure of the inverter provided in this application.

[0027] Among them, the reference numerals in the figures are:

[0028] 1. Housing; 11. Partition; 12. Back panel; 13. Wire hole; 2. Power component; 21. Power circuit board; 211. Main circuit terminal; 22. Filter inductor; 3. Drive component; 31. Drive circuit board; 32. Bus capacitor; 4. Inverter component; 5. Rectifier component; 51. Rectifier; 52. Second heat sink; 6. Interactive control component; 61. Interactive panel; 62. Control mounting plate; 63. Control circuit board; 7. Heat dissipation component; 71. Cooling fan; 72. Fan mounting plate; 8. Dust cover. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can 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 the disclosure of this utility model.

[0035] In the following description, suffixes such as "circuit", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meaning. Therefore, they can be used interchangeably.

[0036] The present invention will be further described in detail below through specific implementations in conjunction with the accompanying drawings.

[0037] like Figure 1 and Figure 2 As shown, the present application provides an inverter, including a housing 1, a power assembly 2, and a drive assembly 3. The housing 1 serves as the main frame of the inverter. The power assembly 2 and the drive assembly 3 are both installed in the housing 1. The power assembly 2 includes a power circuit board 21 and a filter inductor 22, which is electrically connected to the power circuit board 21. The filter inductor 22 is used to filter out signals within a specific frequency range in the circuit, and the filter inductor 22 generates heat during operation.

[0038] The driver assembly 3 includes a driver circuit board 31 and bus capacitors 32. The bus capacitors 32 are connected to the driver circuit board 31, which is electrically connected to the power circuit board 21. Bus capacitors 32 are important components in power systems for smoothing voltage, absorbing current, reducing inductance, and preventing overcharge. They are often used to compensate for power demand differences when the power supply frequency changes. Bus capacitors 32 also release heat during operation.

[0039] Therefore, the two main heat-dissipating components, the filter inductor 22 and the busbar capacitor 32, are placed on the same side of the power circuit board 21, facing the same end of the housing 1. This centralizes the heat-dissipating components, facilitating heat management and effective heat dissipation within the inverter. This arrangement also allows the power circuit board 21 and the driver circuit board 31 to be placed closer together, reducing the space occupied by the power assembly 2 and the driver assembly 3 within the housing 1 and improving space utilization.

[0040] In one embodiment of the present application, the housing 1 further includes a partition 11 installed inside the housing 1. The partition 11 acts as a physical partition, dividing the cavity inside the housing 1 into a front cavity and a rear cavity. It should be noted that the front end refers to the end facing the user and capable of human-computer interaction with the user; the rear end is the end away from the user. The partition 11 has multiple through holes, which facilitate the insertion of the main heat-generating components of the inverter into the rear cavity for centralized heat management.

[0041] Therefore, when arranging the power component 2 and the drive component 3, the power circuit board 21 is placed in the front cavity, the filter inductor 22 is passed through the first through hole on the partition 11 and extended to the rear cavity, and the heat generated by the filter inductor 22 is dissipated to the rear cavity. The output conductive copper column on the drive circuit board 31 is connected to the metal hole on the power circuit board 21, and the signal terminal on the drive circuit board 31 is connected to the socket on the power circuit board 21. To ensure that the filter inductor 22 has sufficient heat dissipation area, at least two-thirds of the height of the filter inductor 22 is in the rear cavity. Similarly, the drive circuit board 31 is placed in the front cavity, and the bus capacitor 32 is passed through the second through hole on the partition 11 and extended to the rear cavity. Concentrating the main heat-generating components such as the filter inductor 22 and the bus capacitor 32 in the rear cavity realizes centralized management and effective heat dissipation, which is beneficial to improving the overall heat dissipation effect of the inverter.

[0042] In one embodiment of the present application, the inverter further includes an inverter assembly 4. This assembly is used to convert direct current (DC) power into alternating current (AC) power of constant frequency and voltage, or frequency and voltage. The inverter assembly 4 is mounted on the partition 11 and electrically connected to the power circuit board 21. The inverter assembly 4 generates heat during operation. Therefore, extending the heat dissipation end of the inverter assembly 4 into the rear cavity facilitates centralized heat management within the inverter.

[0043] In one embodiment of the present application, the inverter further includes a rectifier assembly 5, which specifically includes a rectifier 51 and a second heat sink 52. The rectifier 51 is a device that converts alternating current into direct current. The rectifier 51 is connected to the second heat sink 52 by fasteners such as screws, and is electrically connected to the power circuit board 21; the heat generated by the rectifier 51 during operation is conducted to the second heat sink 52. The second heat sink 52 is mounted on the partition 11, and the heat dissipation end extends to the rear end cavity, dissipating the heat on the second heat sink 52 to the rear end cavity, thereby facilitating centralized management of heat inside the inverter. In terms of the position layout of the partition 11, the rectifier assembly 5 is located at the lower left of the inverter assembly 4.

[0044] like Figure 1As shown, in one embodiment of the present application, the frequency converter further includes an interactive control component 6. The interactive control component 6 specifically includes an interactive panel 61, a control mounting board 62, and a control circuit board 63. The interactive panel 61 is mounted on the front panel of the housing 1, and is equipped with a button array on the interactive panel 61 to facilitate the user to input operating instructions. It is also equipped with a display screen that can display information such as the operating status, parameter settings, and fault information of the frequency converter in real time to achieve human-computer interactive feedback. The control mounting board 62 is connected to the inner wall of the front cavity, and the control circuit board 63 is installed on the control mounting board 62 and is signal-connected to the power circuit board 21. The control circuit board 63 integrates a microprocessor, a logic circuit, and a signal conditioning module, and can process user input signals from the interactive panel 61, as well as other control signals from within the system, and accordingly issue corresponding control instructions to achieve regulation of the operating status of the frequency converter. At the same time, the control circuit board 63 is also responsible for monitoring the working status of the frequency converter to ensure that the equipment operates under safe and stable conditions.

[0045] like Figure 1 As shown, in one embodiment of the present application, a heat dissipation opening is provided on the top surface of the rear cavity to facilitate the natural discharge of hot air. A heat dissipation component 7 is installed on the heat dissipation opening to enhance the heat dissipation effect of the inverter.

[0046] like Figure 1 As shown, in one embodiment of the present application, the heat dissipation assembly 7 includes a heat dissipation fan 71 and a fan mounting plate 72. The fan mounting plate 72 is connected to the rear end cavity, and the heat dissipation fan 71 is mounted on the fan mounting plate 72. The heat dissipation fan 71 is used to quickly extract and discharge the heat in the rear end cavity. In addition, the heat dissipation fan 71 is also electrically connected to the control circuit board 63. The control circuit board 63 can intelligently adjust the speed of the heat dissipation fan 71 according to the real-time temperature changes in the rear end cavity, ensuring that the energy consumption is optimized while maintaining the heat dissipation effect.

[0047] like Figure 2 As shown, in one embodiment of the present application, a dust cover 8 is further provided on each through hole of the partition 11. The dust cover 8 is used to seal the gap between the through hole and the device passing through the through hole to prevent external dust, stains, etc. from entering the front cavity from the rear cavity through the gap between the through hole and the device. The dust cover 8 is specifically made of sponge material. The sponge material not only has good sealing performance and can fit tightly to the edge of the through hole and the surface of the device to form a reliable dustproof barrier, but also has elasticity and shock absorption capabilities, so that the dust cover 8 can also play a certain degree of shock absorption and buffering role during the operation of the equipment.

[0048] like Figure 1As shown, in one embodiment of the present application, a back panel 12 is provided at the rear end of the housing 1. The back panel 12 is detachably connected to the housing 1. The detachable connection methods include, but are not limited to, screw fixing, snap locking, or magnetic adsorption. The detachable design of the back panel 12 allows users to easily inspect the components in the rear cavity without the need for complex disassembly of the entire device, thereby simplifying the maintenance process and shortening maintenance time.

[0049] like Figure 1 As shown, in one embodiment of the present application, a main circuit terminal 211 is provided on the power circuit board 21. The main circuit terminal 211 is used to input / output electrical signals, and a firm connection with an external input wire or output wire is achieved through the main circuit terminal 211.

[0050] like Figure 1 As shown, in one embodiment of the present application, the housing 1 is further provided with a wire hole 13. Through the provided wire hole 13, the wire can pass through the housing 1 until it is connected to the main circuit terminal 211. The edges of the wire hole 13 are smooth, without sharp corners or burrs, effectively preventing physical damage to the wire during the passage process and ensuring the safe and stable operation of the electrical system. The wire hole 13 is oriented towards the main circuit terminal 211, avoiding complex wiring paths and unnecessary line losses.

[0051] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A frequency converter, characterized in that: include: Housing (1); A power component (2) is installed in the housing (1), the power component (2) comprising a power circuit board (21) and a filter inductor (22), the filter inductor (22) being electrically connected to the power circuit board (21); A drive assembly (3) is installed in the housing (1), the drive assembly (3) comprising a drive circuit board (31) and a bus capacitor (32), the bus capacitor (32) being connected to the drive circuit board (31), and the drive circuit board (31) being electrically connected to the power circuit board (21); The filter inductor (22) and the busbar capacitor (32) are both located on the same side of the power circuit board (21) and face the same end of the housing (1).

2. The frequency converter according to claim 1, wherein: The shell (1) further comprises a partition (11) installed in the shell (1), wherein the partition (11) divides the cavity in the shell (1) into a front cavity and a rear cavity; the partition (11) has a plurality of through holes; The power circuit board (21) is placed in the front-end cavity, and the filter inductor (22) passes through the first through hole on the partition (11) and extends to the rear-end cavity; the drive circuit board (31) is placed in the front-end cavity, and the busbar capacitor (32) passes through the second through hole on the partition (11) and extends to the rear-end cavity.

3. The frequency converter according to claim 2, wherein: It comprises an inverter assembly (4), the inverter assembly (4) being mounted on the partition (11) and electrically connected to the power circuit board (21); the heat dissipation end of the inverter assembly (4) extending to the rear end cavity.

4. The frequency converter according to claim 2, wherein: The invention comprises a rectifier assembly (5), which comprises a rectifier (51) and a second heat sink (52), wherein the rectifier (51) is connected to the second heat sink (52) and is electrically connected to the power circuit board (21); the second heat sink (52) is mounted on the partition (11) and extends a heat sink end to the rear end cavity.

5. The frequency converter according to claim 2, wherein: The invention comprises an interactive control component (6), wherein the interactive control component (6) comprises an interactive panel (61), a control mounting board (62) and a control circuit board (63), wherein the interactive panel (61) is mounted on the front panel of the housing (1), the control mounting board (62) is connected to the inner wall of the front cavity, and the control circuit board (63) is mounted on the control mounting board (62) and is signal-connected to the power circuit board (21).

6. The frequency converter according to claim 5, characterized in that: The top surface of the rear end cavity is provided with a heat dissipation opening, and a heat dissipation component (7) is installed on the heat dissipation opening.

7. The frequency converter according to claim 6, characterized in that: The heat dissipation assembly (7) includes a heat dissipation fan (71) and a fan mounting plate (72), wherein the fan mounting plate (72) is connected to the rear end cavity, and the heat dissipation fan (71) is mounted on the fan mounting plate (72) and is electrically connected to the control circuit board (63).

8. The frequency converter according to any one of claims 2 to 5, characterized in that: A dust cover (8) is also provided on each through hole of the partition (11), and the dust cover (8) is used to seal the gap between the through hole and the device passing through the through hole.

9. The frequency converter according to any one of claims 1 to 5, characterized in that: The power circuit board (21) is provided with a main circuit terminal (211), and the main circuit terminal (211) is used for inputting / outputting electrical signals.

10. The frequency converter according to claim 9, characterized in that: The housing (1) is further provided with a wire threading hole (13), and the wire threading hole (13) faces the main circuit terminal (211).

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