A frequency converter facilitating assembly of components

Abstract

The utility model discloses a kind of frequency converter facilitating assembly, three-phase frequency conversion assembly, single-phase frequency conversion assembly and power line entry assembly in frequency converter are independent, by power line entry terminal is connected to three-phase or single-phase power supply, make frequency converter drive three-phase frequency conversion assembly or single-phase frequency conversion assembly, solved the cost, volume and reliability contradiction in three-phase / single-phase adaptation of traditional frequency converter, and modular design makes the power device failure of frequency conversion assembly without replacing complete machine, reduce maintenance cost, provide efficient, flexible solution, especially suitable for the application scene needing frequently switched motor type or space limited, fan area is directly opposite three-phase frequency conversion assembly and power line entry assembly, effectively reduce radiator, single-phase power device and the temperature of power line entry terminal, three-phase power device extends to upper chamber, and lower chamber heat dissipation area is layered layout, avoid the thermal coupling problem of centralized architecture, simultaneously make full use of vertical space, compact layout realizes volume minimization.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and specifically to a frequency converter that is easy to assemble components. 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 to the motor. A frequency converter mainly consists of a housing and electronic components installed inside the housing, such as a control board, heat sink, and fan.

[0003] As the core equipment for motor control, frequency converters have always focused on improving efficiency, expanding applicability, and enhancing reliability. With the diversification of industrial applications, the need for a single frequency converter to be compatible with both three-phase and single-phase motors is becoming increasingly prominent. Three-phase motors are widely used in industrial fields due to their high power density and stable operation, while single-phase motors occupy an important position in civilian and small-scale industrial scenarios due to their cost advantages. Traditional frequency converters require complex hardware modifications or parameter adjustments to achieve compatibility, leading to increased costs and size. As the core component of the frequency converter, the power unit undertakes key functions such as rectification, filtering, inversion, and energy feedback. Traditional designs use a centralized architecture, integrating all power devices on the same control board, resulting in severe thermal coupling.

[0004] In view of this, there is an urgent need to design a frequency converter that can be adapted to both three-phase and single-phase motor control without affecting assembly efficiency and product size. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a frequency converter that facilitates component assembly, including a chassis. The chassis has an internal partition plate dividing it into an upper chamber and a lower chamber. The lower chamber includes a heat dissipation area and a fan area. A three-phase frequency converter, a single-phase frequency converter, and a power input assembly are connected within the heat dissipation area. The single-phase frequency converter and the power input assembly are located on the same side of the three-phase frequency converter. The fan area faces the three-phase frequency converter and the power input assembly. The three-phase frequency converter includes a circuit board, a heat sink, and a three-phase power unit. The components include a circuit board fixedly connected to the partition plate, a three-phase power device electrically connected to the circuit board and extending to the upper chamber, a heat sink connected below the circuit board, a power input assembly including a power input socket fixed to the side wall of the chassis, a power input socket connected to a power input terminal, the power input terminal being electrically connected to the circuit board, and a single-phase frequency converter assembly including a single-phase power device and a positioning base plate interconnected to each other, the positioning base plate being connected to the side of the power input socket, and the single-phase power device being electrically connected to the circuit board.

[0006] The present invention is further configured such that an air outlet is provided on the side of the heat dissipation area away from the fan area, and the number of single-phase power devices is two, and the two single-phase power devices are arranged along the direction from the air outlet to the fan area and are staggered along the direction from the heat dissipation area to the upper chamber.

[0007] The present invention is further configured such that terminal blocks are connected to both sides of the single-phase power device, and one of the terminal blocks is connected to the positioning substrate.

[0008] The present invention is further configured such that the terminal block is provided with a single-phase power terminal that is connected to the circuit board.

[0009] The present invention is further configured such that the power input terminal includes a conductive bus and an adapter bus, the conductive bus is fixed on the power input socket, a wiring port is provided on the side wall of the chassis, the conductive bus extends to the outside of the wiring port, the adapter bus is T-shaped, the adapter bus includes an adapter part and a positioning part, and the adapter part is connected to the conductive bus by fasteners.

[0010] The present invention is further configured such that a connecting slot and a capacitor clearance hole are provided on the partition plate, the three-phase power device extends through the connecting slot to the upper chamber, and a capacitor is connected on the circuit board, the capacitor being connected in the capacitor clearance hole.

[0011] The present invention is further configured such that the chassis includes a base and an upper cover plate, a middle cover plate and a lower cover plate connected to the base. The base has positioning grooves on both sides, and the positioning grooves are bent inward to form a base positioning part. The middle cover plate has a cover plate positioning part at the position opposite to the base positioning part. The middle cover plate is connected to the base by fasteners passing through the cover plate positioning part and the base positioning part in sequence.

[0012] The present invention is further configured such that the middle cover plate is provided with an extension portion on the side of the upper cover plate and the lower cover plate respectively, the cover plate positioning portion is located on the extension portion, and the upper cover plate and the lower cover plate respectively cover the extension portion.

[0013] The present invention is further provided with an indicator window on the middle cover plate.

[0014] The present invention is further configured such that a sliding assembly is connected to the back of the base, the sliding assembly including a sliding seat fixed on the base, and movable pulleys are provided on both sides of the sliding seat.

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0016] In this technical solution, the three-phase frequency converter, single-phase frequency converter, and power input component of the frequency converter are independent. They are connected to a three-phase or single-phase power supply through the power input terminal, enabling the frequency converter to drive the three-phase or single-phase frequency converter. This solves the contradiction between cost, size, and reliability in the three-phase / single-phase adaptation of traditional frequency converters. Moreover, the modular design means that when the power device of the frequency converter fails, there is no need to replace the whole machine, only the corresponding module needs to be replaced, reducing maintenance costs. It provides an efficient and flexible solution for industrial drive systems, and is especially suitable for applications that require frequent switching of motor types or are space-constrained.

[0017] In this technical solution, the inverter fan area faces the three-phase inverter component and the power input component, forming a forced convection heat dissipation channel, which effectively reduces the temperature of the heat sink, single-phase power devices and power input terminals. The three-phase power devices extend to the upper chamber and are arranged in a layered layout with the heat dissipation area in the lower chamber, avoiding the thermal coupling problem of the centralized architecture. At the same time, it makes full use of vertical space and achieves a compact layout to minimize the volume. Attached Figure Description

[0018] Figure 1 This is a perspective view of the frequency converter according to an embodiment of the present utility model.

[0019] Figure 2 This is an exploded view of the frequency converter according to an embodiment of the present invention.

[0020] Figure 3 This is a perspective view of the base and partition plate in an embodiment of the present utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of the frequency converter in an embodiment of this utility model.

[0022] Figure 5 This is a front view of the frequency converter according to an embodiment of the present utility model.

[0023] Figure 6 for Figure 5 Sectional view of AA.

[0024] Figure 7 This is a perspective view of the single-phase frequency converter and power input assembly according to an embodiment of the present utility model.

[0025] Figure 8 This is an exploded view of the power input assembly according to an embodiment of the present utility model.

[0026] Figure 9 This is another perspective view of the frequency converter according to an embodiment of the present utility model. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Combined with appendix Figure 1 To be continued Figure 9 This utility model provides a frequency converter that facilitates component assembly. It includes a chassis 1, with an internal partition 11 dividing the chassis 1 into an upper chamber 12 and a lower chamber 13. The lower chamber 13 includes a heat dissipation area 131 and a fan area 132. A three-phase frequency converter 2, a single-phase frequency converter 3, and a power input assembly 4 are connected within the heat dissipation area 131. The single-phase frequency converter 3 and the power input assembly 4 are located on the same side of the three-phase frequency converter 2. The fan area 132 faces the three-phase frequency converter 2 and the power input assembly 4. The three-phase frequency converter 2 includes a circuit board 21, a heat sink 22, and three-phase power devices 23. The circuit board 21 is fixedly connected to the partition plate 11. The three-phase power device 23 is electrically connected to the circuit board 21 and extends to the upper chamber 12. The heat sink 22 is connected below the circuit board 21. The power input assembly 4 includes a power input socket 41 fixed to the side wall of the chassis 1. The power input socket 41 is connected to a power input terminal 42. The power input terminal 42 is electrically connected to the circuit board 21. The single-phase frequency converter assembly 3 includes a single-phase power device 31 and a positioning base plate 32 connected to each other. The positioning base plate 32 is connected to the side of the power input socket 41. The single-phase power device 31 is electrically connected to the circuit board 21.

[0029] In this technical solution, the inverter fan area 132 faces the three-phase inverter component 2 and the power input component 4, forming a forced convection heat dissipation channel, which effectively reduces the temperature of the heat sink 22, the single-phase power device 31 and the power input terminal 42. The three-phase power device 23 extends to the upper chamber 12 and is arranged in a layered manner with the heat dissipation area 131 of the lower chamber 13, avoiding the thermal coupling problem of the centralized architecture. At the same time, it makes full use of the vertical space and achieves a compact layout to minimize the volume.

[0030] In this embodiment, the fan area 132 is equipped with a fan, which is a conventional setting in the field of frequency converters. Therefore, the specific structure of the fan is not limited and is not shown in the accompanying drawings.

[0031] In this embodiment, the power input component 4 serves as the unified input port of the frequency converter. Based on the circuit configuration on the circuit board 21, two of the power input terminals 42 in the power input component 4 are selected as the input power for the single-phase frequency converter. When the frequency converter is used in a three-phase or single-phase motor system, the corresponding operating mode needs to be set.

[0032] In this embodiment, the power input assembly 4 is fixedly installed on the side of the chassis 1, which can effectively shorten the wiring distance between the power input assembly 4 and the circuit board 21.

[0033] In this embodiment, the three-phase frequency converter 2, single-phase frequency converter 3, and power input component 4 in the frequency converter of this technical solution are independent and are connected to a three-phase or single-phase power supply through the power input terminal 42, so that the frequency converter drives the three-phase frequency converter 2 or the single-phase frequency converter 3. This solves the contradiction between cost, size and reliability in the three-phase / single-phase adaptation of traditional frequency converters. Moreover, the modular design means that when the power device of the frequency converter fails, there is no need to replace the whole machine, only the corresponding module needs to be replaced, which reduces maintenance costs and provides an efficient and flexible solution for industrial drive systems. It is especially suitable for application scenarios that require frequent switching of motor types or have limited space.

[0034] In this embodiment, as shown in the appendix Figure 4 and attached Figure 7 As shown, the heat dissipation area 131 has an air outlet 133 on the side away from the fan area 132. There are two single-phase power devices 31. The two single-phase power devices 31 are arranged along the direction from the air outlet 133 to the fan area 132 and are staggered along the direction from the heat dissipation area 131 to the upper chamber 12. This layout can improve the heat dissipation performance of the single-phase power devices 31, and can achieve efficient heat dissipation even without an independent heat sink.

[0035] In this embodiment, as shown in the appendix Figure 7 As shown, terminal blocks 33 are connected to both sides of the single-phase power device 31. One of the terminal blocks 33 is connected to the positioning base plate 32, which is connected to the side of the power input terminal 41, thereby improving the stability of the connection of the single-phase frequency converter 3 inside the chassis 1.

[0036] In this embodiment, as shown in the appendix Figure 7 As shown, the terminal block 33 is provided with a single-phase power terminal 34 that is connected to the circuit board 21.

[0037] In this embodiment, as shown in the appendix Figure 8As shown, the power input terminal 42 includes a conductive bus 43 and an adapter bus 44. The conductive bus 43 is fixed on the power input base 41. A wiring port 143 is provided on the side wall of the chassis 1. The conductive bus 43 extends to the outside of the wiring port 143. The adapter bus 44 is T-shaped and includes an adapter part 441 and a positioning part 442. The adapter part 441 is connected to the conductive bus 43 by fasteners.

[0038] In this embodiment, as shown in the appendix Figure 3 As shown, the partition plate 11 has a connecting slot 111 and a capacitor clearance hole 112. The three-phase power device 23 extends through the connecting slot 111 to the upper chamber 12. A capacitor 24 is connected to the circuit board 21 and the capacitor 24 is connected in the capacitor clearance hole 112.

[0039] In this embodiment, as shown in the appendix Figure 2 and attached Figure 3 As shown, the chassis 1 includes a base 14 and an upper cover plate 15, a middle cover plate 16 and a lower cover plate 17 connected to the base 14. The base 14 has positioning grooves 141 on both sides. The positioning grooves 141 are bent inward to form a base positioning part 142. The middle cover plate 16 has a cover plate positioning part 161 opposite to the base positioning part 142. The middle cover plate 16 is connected to the base 1 by fasteners passing through the cover plate positioning part 161 and the base positioning part 142 in sequence.

[0040] In this embodiment, as shown in the appendix Figure 2 As shown, the middle cover plate 16 is provided with an extension portion 162 on the side near the upper cover plate 15 and the lower cover plate 17. The cover plate positioning portion 161 is located on the extension portion 162. The upper cover plate 15 and the lower cover plate 17 cover the extension portion 162 respectively, so that after the fastener fixes the middle cover plate 16 to the base 14, the upper cover plate 15 and the lower cover plate 17 cover the fastener connection, making the overall panel of the frequency converter simple and beautiful.

[0041] In this embodiment, as shown in the appendix Figure 2 As shown, an indicator window 163 is provided on the middle cover plate 16.

[0042] In this embodiment, as shown in the appendix Figure 9 As shown, a sliding assembly 5 is connected to the back of the base 1. The sliding assembly 5 includes a sliding seat 51 fixed on the base 1. Movable pulleys 52 are provided on both sides of the sliding seat 51. The sliding assembly 5 is provided to facilitate the transfer of the frequency converter.

[0043] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A frequency converter facilitating assembly of components, comprising a cabinet, wherein a partition is provided inside the cabinet, and the partition divides the cabinet into an upper chamber and a lower chamber, and the lower chamber comprises a heat dissipation area and a fan area, characterized in that, The heat dissipation area is connected to a three-phase frequency converter, a single-phase frequency converter, and a power input assembly. The single-phase frequency converter and the power input assembly are located on the same side of the three-phase frequency converter. The fan area faces the three-phase frequency converter and the power input assembly. The three-phase frequency converter includes a circuit board, a heat sink, and three-phase power devices. The circuit board is fixedly connected to the partition plate. The three-phase power devices are electrically connected to the circuit board and extend to the upper chamber. The heat sink is connected below the circuit board. The power input assembly includes a power input socket fixed to the side wall of the chassis. The power input socket is connected to a power input terminal, which is electrically connected to the circuit board. The single-phase frequency converter includes a single-phase power device and a positioning base plate connected to each other. The positioning base plate is connected to the side of the power input socket. The single-phase power device is electrically connected to the circuit board.

2. The frequency converter for easy component assembly according to claim 1, characterized in that, An air outlet is provided on the side of the heat dissipation area away from the fan area. There are two single-phase power devices. The two single-phase power devices are arranged along the direction from the air outlet to the fan area and are staggered along the direction from the heat dissipation area to the upper chamber.

3. The frequency converter for easy component assembly according to claim 2, characterized in that, Both sides of the single-phase power device are connected to terminal blocks, with one of the terminal blocks connected to the positioning base plate.

4. The frequency converter for easy component assembly according to claim 3, characterized in that, The terminal block is equipped with a single-phase power terminal that connects to the circuit board.

5. A frequency converter for easy component assembly according to claim 1, characterized in that, The power input terminal includes a conductive bus and an adapter bus. The conductive bus is fixed on the power input socket. A wiring port is provided on the side wall of the chassis. The conductive bus extends to the outside of the wiring port. The adapter bus is T-shaped and includes an adapter part and a positioning part. The adapter part is connected to the conductive bus by fasteners.

6. A frequency converter that facilitates component assembly according to any one of claims 1 to 5, characterized in that, The partition plate has a connecting slot and a capacitor clearance hole. The three-phase power device extends through the connecting slot to the upper chamber. A capacitor is connected to the circuit board and the capacitor is connected in the capacitor clearance hole.

7. A frequency converter that facilitates component assembly according to any one of claims 1 to 5, characterized in that, The chassis includes a base and an upper cover plate, a middle cover plate and a lower cover plate connected to the base. The base has positioning grooves on both sides, and the positioning grooves are bent inward to form base positioning parts. The middle cover plate has a cover plate positioning part at the position opposite to the base positioning part. The middle cover plate is connected to the base by fasteners passing through the cover plate positioning part and the base positioning part in sequence.

8. A frequency converter for easy component assembly according to claim 7, characterized in that, The middle cover plate is provided with an extension portion on the side near the upper cover plate and the lower cover plate, the cover plate positioning portion is located on the extension portion, and the upper cover plate and the lower cover plate respectively cover the extension portion.

9. A frequency converter for easy component assembly according to claim 7, characterized in that, An indicator window is provided on the middle cover plate.

10. A frequency converter for easy component assembly according to claim 7, characterized in that, The back of the base is connected to a sliding assembly, which includes a sliding seat fixed on the base, and movable pulleys are provided on both sides of the sliding seat.

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