Frequency converter and frequency converter all-in-one machine

Abstract

The utility model provides a frequency converter and a frequency converter all-in-one machine, the frequency converter all-in-one machine comprises a motor and a frequency converter, and the frequency converter is installed on the motor. The frequency converter comprises: a heat dissipation substrate having a first side surface distributed along a first direction and a second side surface distributed along a second direction; the frequency conversion assembly is arranged on the first side face of the heat dissipation substrate; the capacitor assembly is arranged on the second side surface of the heat dissipation substrate and is electrically connected with the frequency conversion assembly; the two axial ends of the capacitor assembly extend towards the two opposite sides of the heat dissipation substrate in the first direction respectively. The capacitor assembly does not need to additionally occupy the space in the first direction, so that the total size of the frequency converter and the motor in the first direction is reduced, the structural layout of the frequency converter is more compact, and the occupied space is smaller.

Description

Technical Field

[0001] The present application belongs to the technical field of frequency converters, and more specifically, relates to a frequency converter and a frequency converter all-in-one machine. Background Art

[0002] The frequency converter is a power control device that uses the on-off function of power semiconductor devices to convert an AC power supply with fixed voltage and frequency into an AC power supply with adjustable voltage and frequency. It controls the AC motor by changing the frequency of the motor's working power supply.

[0003] In existing related technologies, the inverter and the motor are installed in the same cavity to facilitate electrical connection between the inverter and the motor. However, the inverter has many structural components, the layout is not compact, and it takes up a lot of space. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a frequency converter and a frequency converter all-in-one machine to solve the technical problem of the non-compact layout of the structural components of the frequency converter in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is to provide a frequency converter, comprising:

[0006] a heat dissipation substrate having a first side surface distributed along a first direction and a second side surface distributed along a second direction;

[0007] A frequency conversion component, the frequency conversion component is arranged on the first side surface of the heat dissipation substrate;

[0008] The capacitor component is arranged on the second side surface of the heat dissipation substrate and is electrically connected to the frequency conversion component; the axial ends of the capacitor component respectively extend toward the opposite sides of the heat dissipation substrate along the first direction.

[0009] In some embodiments, the frequency conversion component includes a rectifier module and an inverter module spaced apart on the heat dissipation substrate, and the rectifier module and the inverter module are spaced apart along the third direction.

[0010] In some embodiments, the frequency converter further includes a first conductive bar, a first end of the first conductive bar is electrically connected to the capacitor assembly, and a second end of the first conductive bar is electrically connected to the rectifier module and the inverter module respectively.

[0011] In some embodiments, the first conductive bar includes a first conductive segment, a second conductive segment, and a third conductive segment that are bent and connected in sequence. The first conductive segment is electrically connected to the capacitor component; the third conductive segment is electrically connected to the rectifier module; and the inverter module is electrically connected to the second conductive segment or the third conductive segment.

[0012] In some embodiments, a second conductive bar for connecting to an external power source is provided on a side of the rectifier module facing away from the capacitor assembly.

[0013] In some embodiments, the heat dissipation substrate is provided with a support column and a support plate mounted on the support column, and the support plate is provided with a driving circuit.

[0014] In some embodiments, the frequency conversion assembly is detachably mounted on the heat dissipation substrate via a first fastener, the heat dissipation substrate is detachably mounted on the motor via a second fastener, and the drive circuit is mounted on the support plate via a third fastener.

[0015] In some embodiments, a cooling fan is provided on the side of the driving circuit.

[0016] In some embodiments, a fluid channel for conveying fluid is provided inside the heat dissipation substrate.

[0017] On the other hand, the present application also provides an all-in-one inverter, comprising a motor and the above-mentioned inverter, wherein the inverter is installed on the motor.

[0018] The beneficial effects of the inverter and inverter-all-in-one provided by the present application are: by arranging the capacitor component on the second side surface of the heat dissipation substrate, and the axial ends of the capacitor component extend to the opposite sides of the first direction of the heat dissipation substrate respectively, the capacitor component and the frequency conversion component have a partial overlap along the first direction, and the capacitor component and the motor have a partial overlap along the first direction, that is, the capacitor component does not need to occupy additional space in the first direction, so that the size of the entire inverter-all-in-one along the first direction is not the sum of the lengths of the capacitor component, the heat dissipation substrate and the motor, but the sum of the lengths of the motor, the heat dissipation substrate and the frequency conversion component, thereby reducing the total size of the inverter and the motor along the first direction, making the structural layout of the inverter more compact and occupying less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of the frequency converter provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the top view of the inverter provided in an embodiment of the present application;

[0022] Figure 3A schematic diagram of the decomposed structure of the frequency converter provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the inverter provided in an embodiment of the present application after removing the capacitor assembly and the first conductive bar;

[0024] Figure 5 This is a schematic structural diagram of the capacitor assembly and the first conductive bar in the inverter provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figures are:

[0026] 100, heat dissipation substrate; 110, first side; 120, second side; 130, fluid channel; 200, frequency conversion component; 210, rectifier module; 220, inverter module; 230, mounting plate; 231, mounting portion; 232, connecting portion; 233, locking portion; 300, capacitor component; 310, capacitor; 400, first conductive row; 410, first conductive segment; 420, second conductive segment; 430, third conductive segment; 440, first Pin; 450, second pin; 460, third pin; 470, positive conductive bar; 480, negative conductive bar; 500, second conductive bar; 600, protection circuit; 700, support column; 800, support plate; 810, mounting column; 900, drive circuit; 910, drive board; 920, power board; 1000, fan; 1100, input copper bar; 1200, output copper bar; X, first direction; Y, third direction; Z, second direction. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0028] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 cannot be understood as a limitation on this application.

[0030] 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 defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] See also Figures 1 to 3 The frequency converter provided by the embodiment of the present application is now described. The various structural components in the frequency converter are compactly arranged, can be integrated together, and can be installed on various types of motors.

[0032] The inverter includes a heat dissipation substrate 100, a frequency conversion component 200 and a capacitor component 300; the heat dissipation substrate 100 has a first side surface 110 distributed along a first direction X and a second side surface 120 distributed along a second direction Z; the frequency conversion component 200 is arranged on the first side surface 110 of the heat dissipation substrate 100; the capacitor component 300 is arranged on the second side surface 120 of the heat dissipation substrate 100 and is electrically connected to the frequency conversion component 200; the axial ends of the capacitor component 300 extend respectively to opposite sides of the heat dissipation substrate 100 along the first direction X.

[0033] The heat dissipation substrate 100 is mainly used to support the frequency conversion component 200 and realize the detachable connection between the frequency converter and the motor. In addition, the heat dissipation substrate 100 is a plate-shaped structure with heat dissipation function, which can be used to realize rapid heat dissipation of the frequency conversion component 200.

[0034] In addition, when the inverter is connected to the motor, the inverter component 200 and the motor are respectively installed on the two first side surfaces 110 of the heat dissipation substrate 100, that is, the motor, the heat dissipation substrate 100 and the inverter component 200 are distributed in sequence along the first direction X, that is, the motor and the inverter component 200 are respectively arranged on opposite sides of the heat dissipation substrate 100.

[0035] In the inverter in the embodiment of the present application, the capacitor assembly 300 is disposed on the second side surface 120 of the heat dissipation substrate 100, and the axial ends of the capacitor assembly 300 extend toward opposite sides of the heat dissipation substrate 100 along the first direction X. The capacitor assembly 300 partially overlaps with the frequency conversion assembly 200 along the first direction X, and the capacitor assembly 300 partially overlaps with the motor along the first direction X. That is, the capacitor assembly 300 does not occupy additional space in the first direction X. As a result, the size of the entire inverter along the first direction X is not the sum of the lengths of the capacitor assembly 300, the heat dissipation substrate 100, and the motor, but the sum of the lengths of the motor, the heat dissipation substrate 100, and the frequency conversion assembly 200. This reduces the total size of the inverter and the motor along the first direction X, making the structural layout of the inverter more compact and occupying less space.

[0036] In some embodiments, see Figures 1 to 3 The frequency conversion assembly 200 includes an inverter module 220 and a rectifier module 210 which are spaced apart on the heat dissipation substrate 100 . The rectifier module 210 and the inverter module 220 are spaced apart along the third direction Y.

[0037] The rectifier module 210 converts AC power from the AC power supply into DC power. The inverter module 220 (IGBT: Insulated Gate Bipolar Transistor) converts DC power into AC power with adjustable frequency. The capacitor assembly 300 acts as a filter in the inverter, smoothing the rectified DC voltage. The capacitor assembly 300 is typically connected to the rectifier module 210 and the inverter module 220 to form a complete filter circuit.

[0038] The above arrangement allows for a reasonable and compact layout of the rectifier module 210, inverter module 220, and capacitor assembly 300, while also facilitating electrical connections between the capacitor assembly 300 and the rectifier module 210 and inverter module 220. Furthermore, the heat generated by the inverter module 220 and rectifier module 210 can be quickly dissipated via the heat dissipation substrate 100.

[0039] Optionally, the first direction X, the third direction Y, and the second direction Z are perpendicular to each other.

[0040] In some embodiments, see Figure 4 The inverter module 220 is entirely mounted on the first side surface 110 of the heat sink 100, while the rectifier module 210 at least partially extends outward from the heat sink 100, away from the inverter module 220. This arrangement allows the heat sink 100 to dissipate heat for the rectifier module 210 and reduces the size of the heat sink 100 to avoid interference with the motor structure.

[0041] In some embodiments, the frequency conversion assembly 200 is detachably mounted on the heat dissipation substrate 100 via a first fastener, thereby facilitating disassembly, assembly, and maintenance of the frequency conversion assembly 200 .

[0042] For details, please refer to Figure 4 The inverter module 220 is fixed to the heat dissipation substrate 100 by screws or bolts, which not only makes the inverter module 220 firmly installed, but also facilitates the disassembly and maintenance of the inverter module 220.

[0043] For details, please refer to Figure 4 The rectifier module 210 is mounted on the heat dissipation substrate 100 via a mounting plate 230. Specifically, the mounting plate 230 includes a mounting portion 231, a connecting portion 232, and a locking portion 233. The rectifier module 210 is mounted on the mounting portion 231. The connecting portion 232 is connected between the mounting portion 231 and the locking portion 233. The locking portion 233 is fastened to the heat dissipation substrate 100 by screws or bolts, thereby mounting the rectifier module 210 on the heat dissipation substrate 100.

[0044] Optionally, the mounting portion 231 and the heat dissipation substrate 100 are parallel to each other and spaced apart along the third direction Y. The locking portion 233 is attached to the first side surface 110 of the heat dissipation substrate 100, and the connecting portion 232 extends perpendicularly from the locking portion 233 along the first direction to the mounting portion 231. This arrangement leaves the side of the mounting portion 231 facing the motor open, making it easier to avoid the motor.

[0045] In some embodiments, see Figures 1 to 3 The inverter further includes a first conductive bar 400, a first end of which is electrically connected to the capacitor assembly 300, and a second end of which is electrically connected to the rectifier module 210 and the inverter module 220. The first conductive bar 400 forms an electrical connection between the capacitor assembly 300 and the rectifier module 210 and the inverter module 220. This allows the first conductive bar 400 to mechanically connect and support the capacitors in the capacitor assembly 300 while also electrically connecting the capacitors to the rectifier module 210 and the inverter module 220, thereby reducing the number of cables and improving the overall structure of the inverter.

[0046] In some embodiments, see Figure 2 and Figure 5 The first conductive bar 400 includes a first conductive segment 410, a second conductive segment 420, and a third conductive segment 430 that are bent and connected in sequence. The first conductive segment 410 is electrically connected to the capacitor component 300; the third conductive segment 430 is electrically connected to the rectifier module 220; and the inverter module 210 is electrically connected to the second conductive segment 420 or the third conductive segment 430.

[0047] Specifically, the first conductive segment 410 is arranged at one side of the capacitor assembly 300 along the first direction X, and the third conductive segment 430 is arranged at one side of the rectifier module 220 along the first direction X. The above arrangement enables the first conductive row 400 to be arranged at one side of the capacitor assembly 300 and the rectifier module 220 along the first direction X, so that the first conductive row 400 does not additionally occupy the space of the frequency converter along the third direction Y and the second direction Z, and the electrical connection structure among the capacitor assembly 300, the rectifier module 220 and the inverter module 210 is simple and occupies small space.

[0048] In some embodiments, referring to Figure 5 , the capacitor assembly 300 includes a plurality of capacitors 310 arranged side by side. The first conductive segment 410 extends a plurality of first pins 440, the third conductive segment 430 extends a plurality of second pins 450 and a third pin 460, wherein each first pin 440 is electrically connected to each capacitor 310, each second pin 450 is electrically connected to the output end of the rectifier module 220, and the third pin 460 is connected to the input end of the inverter module 210.

[0049] Specifically, the first conductive row 400 includes a positive conductive row 470 and a negative conductive row 480, and the positive conductive row 470 and the negative conductive row 480 extend the first pins 440, the second pins 450 and the third pins 460. The first pins 440 extended by the positive conductive row 470 and the negative conductive row 480 are respectively connected to the positive and negative poles of each capacitor 310, the second pins 450 extended by the positive conductive row 470 and the negative conductive row 480 are respectively connected to the positive and negative terminals of the output end of the rectifier module 220, and the third pins 460 of the positive conductive row 470 and the negative conductive row 480 are respectively connected to the positive and negative terminals of the input end of the inverter module 210.

[0050] In some embodiments, referring to Figure 1 and Figure 4 , the frequency converter further includes an input copper row 1100 and an output copper row 1200, the input copper row 1100 is connected between the capacitor assembly 300 and the inverter module 220, specifically between the third pin 460 and the input end of the inverter module 220, and the output copper row 1200 is connected between the output end of the inverter module 220 and the motor. Specifically, the input copper row 1100 and the output copper row 1200 are respectively arranged at opposite sides of the inverter module 220 along the third direction Y, which facilitates the connection of the input and output structures of the inverter module 220, and also makes the layout of each structure compact.

[0051] In some embodiments, referring to Figure 3 and Figure 4A second conductive bar 500 for connecting to an external power source is provided on the side of the rectifier module 210 facing away from the capacitor assembly 300. The provision of the second conductive bar 500 enables connection of an external power source to the input of the rectifier module 210, thereby introducing an AC power source with a constant voltage and frequency into the rectifier module 210. Furthermore, by arranging the second conductive bar 500 and the capacitor assembly 300 on opposite sides of the rectifier module 210 along the second direction Z, a rational structural layout is achieved, ensuring that the input and output connection structures of the rectifier module 210 do not interfere with each other.

[0052] Specifically, the input end of the rectifier module 210 is connected to three second conductive bars 500 for being connected to the three phases of the three-phase alternating current respectively.

[0053] In some embodiments, see Figure 4 The rectifier module 210 is provided with a protection circuit 600, which is used to provide filtering and lightning protection for the inverter. Specifically, the protection circuit 600 is detachably mounted on the rectifier module 210 using screws or bolts, facilitating disassembly and maintenance, while also making the inverter's structural layout compact and reasonable.

[0054] In some embodiments, see Figure 4 The heat dissipation substrate 100 is provided with a support column 700 and a support plate 800 mounted on the support column 700. The support plate 800 is provided with a drive circuit 900. In this embodiment, the drive circuit 900 is supported on the heat dissipation substrate 100 by the support column 700 and the support plate 800. This not only makes the structure compact, but also allows the frequency conversion component 200 and the drive circuit 900 to be spaced apart, which is beneficial for the rapid heat dissipation of the frequency conversion component 200 and the drive circuit 900.

[0055] In some embodiments, see Figure 4 The heat dissipation substrate 100 is provided with a plurality of support columns 700 , each support column 700 is respectively provided on the periphery of the inverter module 220 , and the support plate 800 is installed on each support column 700 .

[0056] Optionally, the heat dissipation substrate 100 is provided with four support columns 700, which are respectively provided at the four corners of the inverter module 220. Of course, in other embodiments, the number of support columns 700 may also be two, three, five, or more than five.

[0057] Optionally, the support column 700 is made of a metal material. The metal material provides good structural strength, providing stable support for the drive circuit 900, and also facilitates grounding of the drive circuit 900. It is understood that in other embodiments, the support column 700 may also be made of a non-metallic material, and this is not intended to be the sole limitation.

[0058] In some embodiments, referring to Figure 4 The side of the drive circuit 900 is provided with a cooling fan 1000, and the rapid heat dissipation of the drive circuit 900 is promoted by the cooling fan 1000. In addition, by arranging the cooling fan 1000 close to the drive circuit 900, the electrical connection between the fan 1000 and the drive circuit 900 is facilitated.

[0059] In some embodiments, referring to Figures 1 to 4 The drive circuit 900 includes a drive board 910 and a power supply board 920, and the drive board 910 and the power supply board 920 are installed on the support plate 800 along the third direction Y, and the drive board 910 is electrically connected with the inverter module 210, and the drive board 910 is used to control the on-off of the inverter module 210. In this embodiment, by arranging the drive board 910 and the power supply board 920 on the support plate 800 along the third direction Y, the occupied space of the drive circuit 900 along the first direction X is reduced.

[0060] In some embodiments, the drive circuit 900 is installed on the support plate 800 by the third fastener.

[0061] Specifically, referring to Figure 4 The support plate 800 extends an installation column 810, the drive board 910 is installed on the installation column 810 by bolts or screws, and the power supply board 920 is installed on the installation column 810 by bolts or screws. Among them, the installation of the installation column 810 can lift the drive board 910 and the power supply board 920 to a certain height, which is beneficial to the heat dissipation of the drive board 910 and the power supply board 920, and also facilitates the disassembly and maintenance of the drive board 910 and the power supply board 920.

[0062] In some embodiments, referring to Figure 1 The inside of the heat dissipation substrate 100 is provided with a fluid channel 130 for conveying fluid. Among them, the arrangement of the fluid channel 130 makes it possible to circulate the cooling liquid in the heat dissipation substrate 100 to achieve the purpose of liquid cooling, and the rapid cooling of the frequency conversion assembly 200 can be realized. It can be understood that in other embodiments of the present application, the heat dissipation substrate 100 can also be made of heat-conducting material, and the surface is provided with heat dissipation fins for heat dissipation.

[0063] On the other hand, the present application also provides a frequency converter all-in-one machine, which comprises a motor and the above-mentioned frequency converter, and the frequency converter is installed on the motor. Specifically, the heat dissipation substrate 100 of the frequency converter is detachably installed on the motor by the second fastener, specifically by bolts or screws, to realize the connection of the motor and the frequency converter as a whole, so that the electrical connection between the motor and the frequency converter is convenient, and too many cables are not needed for electrical connection, reducing the cost.

[0064] 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. Frequency converter, characterized in that, include: a heat dissipation substrate having a first side surface distributed along a first direction and a second side surface distributed along a second direction; A frequency conversion component, the frequency conversion component is arranged on the first side surface of the heat dissipation substrate; The capacitor component is arranged on the second side surface of the heat dissipation substrate and is electrically connected to the frequency conversion component; the axial ends of the capacitor component respectively extend toward the opposite sides of the heat dissipation substrate along the first direction.

2. The frequency converter according to claim 1, wherein: The frequency conversion component includes a rectifier module and an inverter module which are spaced apart on the heat dissipation substrate, and the rectifier module and the inverter module are spaced apart along the third direction.

3. The frequency converter according to claim 2, wherein: The frequency converter further includes a first conductive bar, a first end of the first conductive bar is electrically connected to the capacitor assembly, and a second end of the first conductive bar is electrically connected to the rectifier module and the inverter module respectively.

4. The frequency converter according to claim 3, characterized in that: The first conductive bar includes a first conductive segment, a second conductive segment, and a third conductive segment that are bent and connected in sequence. The first conductive segment is electrically connected to the capacitor component; the third conductive segment is electrically connected to the rectifier module; and the inverter module is electrically connected to the second conductive segment or the third conductive segment.

5. The frequency converter according to any one of claims 2 to 4, characterized in that: A second conductive bar for connecting to an external power source is provided on a side of the rectifier module facing away from the capacitor assembly.

6. The frequency converter according to any one of claims 1 to 4, characterized in that: The heat dissipation substrate is provided with a support column and a support plate installed on the support column, and the support plate is provided with a driving circuit.

7. The frequency converter according to claim 6, characterized in that: The frequency conversion component is detachably mounted on the heat dissipation substrate via a first fastener, the heat dissipation substrate is detachably mounted on the motor via a second fastener, and the drive circuit is mounted on the support plate via a third fastener.

8. The frequency converter according to claim 6, wherein: A heat dissipation fan is provided on the side of the driving circuit.

9. The frequency converter according to any one of claims 1 to 4, characterized in that: A fluid channel for conveying fluid is provided inside the heat dissipation substrate.

10. The inverter is characterized by: The invention comprises a motor and a frequency converter according to any one of claims 1 to 9, wherein the frequency converter is installed on the motor.

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