High-voltage frequency converter

Abstract

The utility model discloses a high-voltage frequency converter. According to the technical innovation, the box body structure of the high-voltage frequency converter is improved, the front-back through type air inlet channel is introduced, and the fan is used for forced exhaust and heat dissipation; meanwhile, the power unit with a large heating value is installed in the middle of the air inlet channel, and compactness of the internal structure of the frequency converter is achieved on the premise that the heat dissipation effect is ensured. In the structure aspect, a plurality of fans are arranged on the inner side of a box door, a shell is arranged on the upper side of a box body, upper strip-shaped holes are formed in the shell, rod bodies are fixed to the four vertical edge positions of the inner space, and a plurality of fixing pieces parallel to the rod bodies and a plurality of transverse plates parallel to the rod bodies are fixed among the four rod bodies. A plurality of partition plates perpendicular to the rod bodies are fixed among the four rod bodies, power units of the high-voltage frequency converter are located among the partition plates, and rotary knobs are rotationally connected to the end faces of the partition plates. The LED lamp is good in heat dissipation effect, convenient to install and compact in structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of frequency converter, specifically is a high voltage frequency converter. BACKGROUND

[0002] The frequency converter is the power semiconductor device's on-off action with the industrial frequency power supply transformation for another frequency's electric energy control device. The high voltage frequency converter is widely used in large mining production factory, petroleum chemical industry, municipal water supply, metallurgical steel, electric power energy and so on, is used in the control of various fan, water pump, compressor, rolling mill and so on equipment.

[0003] The high voltage frequency converter can change the output frequency and voltage, thereby controlling the rotating speed of the alternating current high voltage motor, realizing the variable speed operation of the motor. By adjusting the rotating speed of the motor load, the high voltage frequency converter can change the air volume or water volume according to the actual load requirement, avoid the energy waste on the air door or valve, thereby achieving the purpose of energy saving and emission reduction. The high voltage frequency converter supports the variable frequency soft start of the motor, avoids the impact on the power grid and equipment when directly starting, reduces the impact of starting current. Reduce mechanical wear. Since the rotating speed of the motor load can be smoothly adjusted, the high voltage frequency converter operates at a lower rotating speed, thereby greatly reducing the mechanical wear of the load and the motor. The high voltage frequency converter reduces the voltage fluctuation in the power line by adjusting the power of the motor, reduces the impact on the power grid, effectively reduces the reactive power loss, and increases the effective power of the power grid. Under the complex working conditions requiring large starting torque, high speed regulation accuracy and fast dynamic response, the high voltage frequency converter realizes accurate speed regulation control of the motor through the vector control algorithm and energy feedback technology, thereby improving the production process and improving product quality and production efficiency. In addition, due to the reduction of mechanical wear and voltage fluctuation, the high voltage frequency converter helps to reduce the maintenance cost of the equipment. The use of the high voltage frequency converter can improve the power factor of the power grid, reduce the reactive loss and line loss. With other control equipment, the high voltage frequency converter can realize centralized monitoring and real-time control, improve the safety and stability of system operation. The internal structure of the high voltage frequency converter is relatively compact, and it is easy to cause excessive heat accumulation after a long time of operation. Since the physical structure of the ordinary high voltage frequency converter is mostly poor in heat dissipation effect, the frequency converter is operated for a long time at high temperature, which has great hidden danger to maintain the stability of the equipment. SUMMARY

[0004] The technical problem to be solved by the utility model is that the heat dissipation effect of the ordinary high voltage frequency converter is not perfect.

[0005] In order to realize the above technical purpose, the utility model adopts the following technical scheme:

[0006] A high voltage frequency converter, comprising a box, an internal space, a box door, a lower strip hole, a fan, a groove, a controller, a front cover, a shell, an upper strip hole, a rod, a fixed sheet, a cross plate, a partition, a power unit, a rotary knob, a display, a control key; two box doors are installed on the box, the two box doors are kept in the front and rear of the internal space, a lower strip hole is arranged on the box door, a plurality of fans are arranged on the inner side of the box door, a groove is arranged on the outer side of the box, the controller of the high voltage frequency converter is kept in the groove, the front cover is rotatably connected to the groove, a shell is arranged on the upper side of the box, an upper strip hole is arranged on the shell, a rod is fixed at the four vertical edges of the internal space, a plurality of fixed sheets parallel to the rod and a plurality of cross plates parallel to the rod are fixed between the four rods, a plurality of partitions perpendicular to the rod are fixed between the four rods, the power unit of the high voltage frequency converter is located between the partitions, a rotary knob is rotatably connected to the end face of the partition, the rotary knob is blocked outside the power unit, a display and a control key are arranged on the outer side of the box.

[0007] Preferably, a filter screen is attached and fixed to the outer side of the box door, and the space of the filter screen is 30-50 mesh.

[0008] Preferably, the front cover and the groove are rotatably connected by an elastic hinge.

[0009] Preferably, the power unit comprises a plurality of power modules, each power module comprising a three-phase bridge rectifier, a DC capacitor, and a three-phase full-bridge inverter.

[0010] Preferably, the rod has a horizontal sheet perpendicular to the rod at the upper end and the lower end, and the rod is fixed to the top and bottom of the box through the horizontal sheet.

[0011] Preferably, a rubber shock-absorbing strip is arranged on the inner side of the box door, and the shock-absorbing strip is attached to the box.

[0012] Preferably, a vertical plate is fixed to the side end of the plurality of partitions, and the vertical plate is fixed to the rod.

[0013] Preferably, a rotatable outer cover is fixed to the outer side of the display and the control key.

[0014] The utility model discloses a high voltage frequency converter. This technical innovation improves the box body structure of high voltage frequency converter, introduces the front and rear through type air inlet channel, and utilizes the fan to carry out strong exhaust heat dissipation, simultaneously, installs the power unit of larger heat output in the middle part of air inlet channel, realizes the compactness of the internal structure of frequency converter under the premise of ensuring the heat dissipation effect. In the structure aspect, the utility model discloses a plurality of fans are set up in the inside of box door, the shell is equipped on the upper side of box body, the upper strip hole is equipped on the shell, the rod body is fixed in four vertical edges positions of internal space, a plurality of fixed sheets parallel with the rod body and a plurality of cross plates parallel with the rod body are fixed between four rod bodies, a plurality of partition plates vertical with the rod body are fixed between four rod bodies, and the power unit of this high voltage frequency converter is located between partition plate and partition plate, and the rotary knob is rotatably connected on the end face of partition plate. The utility model has good heat dissipation effect, convenient installation and compact structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the first overall view of high voltage frequency converter;

[0016] Figure 2 It is the second overall view of high voltage frequency converter;

[0017] Figure 3 It is the split view of the box internal structure and the box external structure of high voltage frequency converter;

[0018] Figure 4 It is the explosion view of the box internal structure of high voltage frequency converter;

[0019] Figure 5 It is the first overall view of the box internal structure of high voltage frequency converter;

[0020] Figure 6 It is the second overall view of the box internal structure of high voltage frequency converter;

[0021] Figure 7 It is the third overall view of the box internal structure of high voltage frequency converter;

[0022] Among them:

[0023] DETAILED DESCRIPTION

[0024] The specific embodiment of the utility model will be described in detail below. In order to avoid too many unnecessary details, the structure or function belonging to the known will not be described in detail in the following examples. The approximate language used in the following examples can be used for quantitative expression, indicating that the quantity can have certain change without changing the basic function. Except for the definition, the technical and scientific terms used in the following examples have the same meaning as generally understood by the person skilled in the art to which the utility model belongs.

[0025] Embodiment 1

[0026] A high-voltage frequency converter, see Figures 1-7 , comprising a box body, an internal space, a box door, a lower strip hole, a fan, a groove body, a controller, a front cover, a shell, an upper strip hole, a rod body, a fixed sheet, a cross plate, a partition plate, a power unit, a rotary knob, a display, and a control key; two box doors are installed on the box body and kept in the front and rear of the internal space, a lower strip hole is arranged on the box door, a plurality of fans are arranged on the inner side of the box door, a groove body is arranged on the outer side of the box body, the controller of the high-voltage frequency converter is kept in the groove body, a front cover is rotatably connected to the groove body, a shell is arranged on the upper side of the box body, an upper strip hole is arranged on the shell, a rod body is fixed at the position of the four vertical edges of the internal space, a plurality of fixed sheets parallel to the rod body and a plurality of cross plates parallel to the rod body are fixed between the four rod bodies, a plurality of partition plates perpendicular to the rod body are fixed between the four rod bodies, the power unit of the high-voltage frequency converter is located between the partition plates, a rotary knob is rotatably connected to the end face of the partition plate, and the rotary knob is blocked outside the power unit, a display and a control key are arranged on the outer side of the box body.

[0027] Embodiment 2

[0028] A high-voltage frequency converter, see Figures 1-7 , comprising a box body, an internal space, a box door, a lower strip hole, a fan, a groove body, a controller, a front cover, a shell, an upper strip hole, a rod body, a fixed sheet, a cross plate, a partition plate, a power unit, a rotary knob, a display, and a control key; two box doors are installed on the box body and kept in the front and rear of the internal space, a lower strip hole is arranged on the box door, a plurality of fans are arranged on the inner side of the box door, a groove body is arranged on the outer side of the box body, the controller of the high-voltage frequency converter is kept in the groove body, a front cover is rotatably connected to the groove body, a shell is arranged on the upper side of the box body, an upper strip hole is arranged on the shell, a rod body is fixed at the position of the four vertical edges of the internal space, a plurality of fixed sheets parallel to the rod body and a plurality of cross plates parallel to the rod body are fixed between the four rod bodies, a plurality of partition plates perpendicular to the rod body are fixed between the four rod bodies, the power unit of the high-voltage frequency converter is located between the partition plates, a rotary knob is rotatably connected to the end face of the partition plate, and the rotary knob is blocked outside the power unit, a display and a control key are arranged on the outer side of the box body. A filter screen is attached and fixed to the outer side of the box door, the space of the filter screen is 30-50 meshes. The front cover and the groove body are rotatably connected by an elastic hinge. The power unit comprises a plurality of power modules, each power module comprises a three-phase bridge rectifier, a DC capacitor, and a three-phase full-bridge inverter. The rod body has a transverse sheet perpendicular to the rod body at the upper end and the lower end, and the rod body is fixed to the top and bottom of the box body through the transverse sheet. A rubber shock-absorbing strip is arranged on the inner side of the box door and abuts against the box body. Vertical plates are fixed to the side ends of the plurality of partition plates and fixed to the rod body. A rotatable outer cover is fixed to the outer side of the display and the control key.

[0029] The embodiments of the present application are described in detail above, but the content is only the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the application range of the present application shall be included in the protection range of the present application.

Claims

1. A high voltage frequency converter, characterized in that It includes box (1), internal space (2), box door (3), lower strip hole (4), fan (5), groove (6), controller (7), front cover (8), shell (9), upper strip hole (10), rod (11), fixed sheet (12), cross plate (13), partition (14), power unit (15), rotary knob (16), display (17), control key (18); two box doors (3) are installed on the box (1), two box doors (3) are kept in the front and rear of the internal space (2), the lower strip hole (4) is provided on the box door (3), a plurality of fans (5) are provided on the inside of the box door (3), the groove (6) is provided on the outside of the box (1), the controller (7) of the high voltage frequency converter is kept in the groove (6), the front cover (8) is rotatably connected on the groove (6), the shell (9) is provided on the upper side of the box (1), the upper strip hole (10) is provided on the shell (9), the rod (11) is fixed at four vertical edges of the internal space (2), a plurality of fixed sheets (12) parallel to the rod (11) and a plurality of cross plates (13) parallel to the rod (11) are fixed between the four rods (11), a plurality of partitions (14) perpendicular to the rod (11) are fixed between the four rods (11), the power unit (15) of the high voltage frequency converter is located between the partitions (14) and the partitions (14), the rotary knob (16) is rotatably connected on the end face of the partition (14), the rotary knob (16) is blocked outside the power unit (15), the display (17) and the control key (18) are provided on the outside of the box (1).

2. A high voltage frequency converter according to claim 1, characterized in that The filter screen is attached and fixed on the outside of the box door (3), and the space of the filter screen is 30-50 mesh.

3. A high voltage frequency converter according to claim 1, c h a r a c t e r i z e d in that The front cover (8) and the groove (6) are rotatably connected by an elastic hinge.

4. The high frequency voltage converter of claim 1, wherein The power unit (15) includes a plurality of power modules, each power module includes a three-phase bridge rectifier, a DC capacitor and a three-phase full-bridge inverter.

5. The high frequency voltage converter of claim 1, wherein The rod (11) is fixed through the cross pieces perpendicular to the rod (11) at the upper end and the lower end of the rod (11) and the top and bottom of the box (1).

6. A high voltage frequency converter according to claim 1, characterized in that The rubber shock-absorbing strip is provided on the inside of the box door (3) and abuts against the box (1).

7. A high voltage frequency converter according to claim 1, c h a r a c t e r i z e d i n that The vertical plates are fixed on the side ends of the plurality of partitions (14) and fixed with the rod (11).

8. The high frequency voltage converter of claim 1, wherein The rotatable outer cover is fixed on the outside of the display (17) and the control key (18).

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