Frequency converter

Abstract

The utility model discloses a frequency converter, which comprises a box body, a control module, a driving module, a fan and a reactor placing box, wherein the control module, the driving module and the fan are arranged in the box body; the reactor placing box is arranged at the bottom of the box body; the plurality of fans are horizontally mounted at the tops of the rear sides of the control module and the driving module, and the driving module and the fans are respectively connected with the control module; a driving plate and a partition plate are arranged in the box body, and the driving module is installed on the driving plate; the control module, the driving module and the driving plate are separated from the fan by the partition plate; an electric reactor is arranged in the electric reactor placing box, and the electric reactor is connected with the driving module through a red copper connecting piece. According to the utility model, the reactor is arranged inside, so that the internal components of the device are prevented from being affected with damp and corroded, and the stability and switching performance of the system are improved.

Description

Technical Field

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

[0002] A variable frequency drive (VFD) is a power control device that utilizes frequency conversion and microelectronics technology to control AC motors by varying the motor's operating power supply frequency. It primarily consists of a drive module (AC to DC), an inverter module (DC to AC), and a heat sink. The VFD adjusts the output power voltage and frequency by switching internal IGBTs, providing the required power supply voltage based on the motor's actual needs, thereby achieving energy savings and speed regulation. VFDs also offer numerous protection features, such as overcurrent, overvoltage, and overload protection. With the continuous advancement of industrial automation, VFDs have become increasingly widely used.

[0003] At present, most inverters use external inductors and dissipate heat through cooling, and are equipped with air inlets and heat dissipation vents. For inverters installed in areas with heavy rain or outdoors near water sources, the air contains a lot of water vapor. The water vapor mixed in the air will enter through the air inlet, causing internal components to be corroded by moisture, especially affecting the connection between the inverter and the inductor, resulting in short circuits and disconnections between the inverter and the inductor, thereby shortening the service life of the inverter and the inductor. Utility Model Content

[0004] The purpose of this utility model is to provide a frequency converter that, by integrating a reactor, prevents moisture corrosion from internal components of the device, thereby improving the stability and switching performance of the system. To achieve the above purpose, this utility model adopts the following technical solutions:

[0005] The utility model discloses a frequency converter, comprising a box body, a control module, a drive module and a fan installed inside the box body, and a reactor placement box installed at the bottom of the box body.

[0006] There are a plurality of fans, which are horizontally mounted on the top of the rear side of the control module and the driving module, and the driving module and the fans are respectively connected to the control module.

[0007] A driving plate and a partition are provided inside the box, and the driving module is mounted on the driving plate; the partition separates the control module, the driving module and the driving plate from the fan.

[0008] The reactor placement box is provided with a reactor, and the reactor and the driving module are connected via a copper connecting piece.

[0009] Furthermore, the box body and the reactor placement box are separated by a detachable bottom plate, a straight slot is provided on the bottom plate, and the copper connecting piece extends from the straight slot into the reactor placement box and is connected to the reactor.

[0010] The bottom plate is provided with array-arranged bottom plate heat dissipation holes below the fan, and a hollow protective plate is installed around the reactor placement box.

[0011] Furthermore, the partition of the box body is provided with a plurality of circular air guide ports at the position of the driving plate, and an air guide plate is installed on the rear side of the box body, and the side panels on both sides of the box body are provided with array-arranged side panel heat dissipation holes at the position of the air guide ports.

[0012] Preferably, the partition is an aluminum alloy heat conducting plate.

[0013] Furthermore, a display operation panel of the control module is installed on the front of the box.

[0014] Furthermore, the reactor is provided with at least one first mounting hole at the connection with the copper connecting plate, and one end of the copper connecting plate is provided with a third mounting hole corresponding to the first mounting hole, and the reactor and the copper connecting plate are fixed by installing bolts in the first mounting hole and the third mounting hole.

[0015] The driving module is provided with at least one second mounting hole at the connection with the copper connecting piece, and the other end of the copper connecting piece is provided with a fourth mounting hole corresponding to the second mounting hole. The driving module and the copper connecting piece are fixed by installing bolts in the second mounting hole and the fourth mounting hole.

[0016] Preferably, the length of the copper connecting piece is 16-60 mm and is bent accordingly according to the installation positions of the drive module and the reactor, and the width of the copper connecting piece is 30-35 mm and the thickness is 2-3 mm.

[0017] Preferably, the surface of the copper connecting piece is plated with a layer of metal tin film.

[0018] After adopting the above technical solution, the utility model has the following effects:

[0019] 1. The utility model uses a highly corrosion-resistant copper connector to connect the drive module and the reactor in the inverter. While ensuring good conductivity, it prevents the connectors between the drive module and the reactor from being corroded by moisture due to excessive water vapor in the air, thereby preventing short circuits and disconnections.

[0020] 2. The utility model integrates the reactor into the inverter. The reactor can suppress surge voltage and surge current, protect sensitive components inside the inverter and prevent them from being damaged. At the same time, the built-in reactor can also reduce oscillation, suppress high-frequency noise and backflow current, and improve the stability and switching performance of the system.

[0021] 3. The utility model sets the reactor at the bottom of the box, and accelerates the air from the top of the box through the fan and discharges it downward and around the reactor. The air is guided by the air guide port and the air guide plate to prevent the residual water vapor in the air from causing moisture corrosion to the internal components of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0023] Figure 2 It is a top view of the utility model.

[0024] Figure 3 for Figure 2 AA section view.

[0025] Figure 4 This is the internal structure diagram of the utility model.

[0026] Figure 5 for Figure 4 Partial exploded view.

[0027] Figure 6 This is the air flow direction diagram of the present utility model.

[0028] Main component symbols:

[0029] 1: Box body, 11: Side panel, 111: Side panel heat dissipation hole, 12: Partition, 121: Air guide port, 13: Drive board, 14: Bottom plate, 141: Straight slot, 142: Bottom plate heat dissipation hole, 15: Air guide plate, 2: Reactor placement box, 21: Reactor, 211 first mounting hole, 22: Hollow protective plate, 3: Control module, 31: Display operation panel, 4: Drive module, 41: Second mounting hole, 5: Fan, 6: Copper connecting piece, 61: Third mounting hole, 62: Fourth mounting hole. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0031] like Figures 1 to 3As shown, the utility model discloses an inverter, comprising: a box 1 and a control module 3, a drive module 4 and a fan 5 installed inside the box 1, and a reactor placement box 2 installed at the bottom of the box 1.

[0032] A plurality of fans 5 are provided and mounted horizontally on the top of the rear side of the control module 3 and the driver module 4. The driver module 4 and the fans 5 are respectively connected to the control module 3. In this embodiment, a display and operation panel 31 of the control module 3 is mounted on the front of the housing 1, and the operation of the driver module 4 and the fans 5 is controlled by the control module 3.

[0033] Inside the housing 1, a drive board 13 and a partition 12 are installed. The drive module 4 is mounted on the drive board 13. The partition 14 separates the control module 3, the drive module 4, and the drive board 13 from the fan 5. A reactor 21 is installed in the reactor storage box 2. The reactor 21 is connected to the drive module 4 via a copper connector 6.

[0034] like Figure 4 and Figure 5 As shown, the box body 1 and the reactor placement box 2 are separated by a detachable bottom plate 14 , on which a straight slot 141 is provided. The copper connecting piece 6 extends from the straight slot 141 into the reactor placement box 2 and is connected to the reactor 21 .

[0035] In this embodiment, the reactor 21 is provided with at least one first mounting hole 211 at the connection with the copper connecting plate 6, and one end of the copper connecting plate 6 is provided with a third mounting hole 61 corresponding to the first mounting hole 211. The reactor 21 and the copper connecting plate 6 are fixed by installing bolts in the first mounting hole 211 and the third mounting hole 61.

[0036] At the same time, the driving module 4 is provided with at least one second mounting hole 41 at the connection with the copper connecting plate 6, and the other end of the copper connecting plate 6 is provided with a fourth mounting hole 62 corresponding to the second mounting hole 41. The driving module 4 and the copper connecting plate 6 are fixed by installing bolts in the second mounting hole 41 and the fourth mounting hole 62.

[0037] Furthermore, in this embodiment, the copper connecting piece 6 has a length of 16-60 mm and is bent accordingly according to the installation position of the drive module 4 and the reactor 21. The copper connecting piece 6 has a width of 30-35 mm and a thickness of 2-3 mm. In other embodiments, the copper connecting piece 6 is coated with a layer of metal tin film.

[0038] Secondly, combined Figure 6As shown, the bottom plate 14 is provided with bottom plate heat dissipation holes 142 arranged in an array below the fan 5, and a hollow protective plate 22 is installed circumferentially of the reactor placement box 2. The partition 12 of the box body 1 is an aluminum alloy heat-conducting plate, and a number of circular air guide ports 121 are provided at the position of the drive plate 13. At the same time, an air guide plate 15 is installed on the rear side of the box body 1, and the side panels 11 on both sides are provided with side panel heat dissipation holes 111 arranged in an array at the position of the air guide ports 121. When the fan 5 starts to run and accelerates the downward movement of the cold air, the air on the side of the air guide port 121 close to the fan 5 causes rapid air flow due to heat dissipation, and the air pressure is reduced. The hot air in the space where the control module 3 and the drive module 4 are located will be discharged through the air guide port 121 of the partition plate 12 under the action of the air pressure difference, and discharged from the side panel heat dissipation holes 111 on both sides of the box body 1. The remaining air enters the reactor placement box 2 from the bottom plate heat dissipation holes 142 under the action of the air guide plate 15 and circulates to dissipate heat to the reactor 21. The hot air generated is discharged from the device through the hollow protective plate 22 around the reactor placement box 2, thereby reducing the contact between the space where the control module 3 and the drive module 4 are located and the air, avoiding the residual water vapor in the air and causing the device components to be corroded by moisture.

[0039] The above description is only a preferred embodiment of the present invention. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A frequency converter, characterized in that: include: A box (1), a control module (3), a drive module (4), and a fan (5) installed inside the box (1), and a reactor placement box (2) installed at the bottom of the box (1); A plurality of fans (5) are provided and are horizontally mounted on the top of the rear side of the control module (3) and the drive module (4), and the drive module (4) and the fans (5) are respectively connected to the control module (3); A drive plate (13) and a partition (12) are provided inside the box (1), and the drive module (4) is mounted on the drive plate (13); the partition (12) separates the control module (3), the drive module (4), the drive plate (13) and the fan (5); A reactor (21) is provided in the reactor placement box (2), and the reactor (21) and the drive module (4) are connected via a copper connecting piece (6).

2. A frequency converter according to claim 1, characterized in that: The box body (1) and the reactor placement box (2) are separated by a detachable bottom plate (14), and a straight slot (141) is provided on the bottom plate (14). The copper connecting piece (6) extends from the straight slot (141) into the reactor placement box (2) and is connected to the reactor (21).

3. A frequency converter according to claim 2, characterized in that: The bottom plate (14) is provided with bottom plate heat dissipation holes (142) arranged in an array below the fan (5), and a hollow protective plate (22) is installed around the reactor placement box (2).

4. The frequency converter according to claim 1, wherein: The partition plate (12) of the box body (1) is provided with a plurality of circular air guide ports (121) at the position of the driving plate (13), and an air guide plate (15) is installed on the rear side of the box body (1), and the side panels (11) on both sides of the box body (1) are provided with array-arranged side panel heat dissipation holes (111) at the position of the air guide ports (121).

5. A frequency converter according to claim 4, characterized in that: The partition (12) is an aluminum alloy heat conducting plate.

6. The frequency converter according to claim 1, wherein: A display operation panel (31) of the control module (3) is installed on the front of the box (1).

7. The frequency converter according to claim 1, wherein: The reactor (21) is provided with at least one first mounting hole (211) at a connection point with the copper connecting piece (6); one end of the copper connecting piece (6) is provided with a third mounting hole (61) corresponding to the first mounting hole (211); the reactor (21) and the copper connecting piece (6) are fixed by installing bolts in the first mounting hole (211) and the third mounting hole (61).

8. A frequency converter according to claim 7, characterized in that: The driving module (4) is provided with at least one second mounting hole (41) at a connection point with the copper connecting piece (6); the other end of the copper connecting piece (6) is provided with a fourth mounting hole (62) corresponding to the second mounting hole (41); the driving module (4) and the copper connecting piece (6) are fixed by installing bolts in the second mounting hole (41) and the fourth mounting hole (62).

9. A frequency converter according to any one of claims 1 to 8, characterized in that: The length of the copper connecting piece (6) is 16-60 mm and is bent accordingly according to the installation positions of the drive module (4) and the reactor (21), and the width of the copper connecting piece (6) is 30-35 mm and the thickness is 2-3 mm.

10. The frequency converter according to claim 9, characterized in that: The copper connecting piece (6) is coated with a layer of metal tin film on its surface.

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