High-power compact integrated high-voltage frequency converter device

Abstract

The utility model relates to a high-power compact integrated high-voltage frequency converter device, and the device comprises a cabinet body which is internally provided with a first separation plate, so as to divide the cabinet body into a first main cavity and a second main cavity; the first main cavity is internally provided with a phase-shifting transformer, the second main cavity is internally provided with two vertical insulating plates which are arranged at an interval and are connected with the first partition plate so as to divide the second main cavity into three sub-cavities, the sub-cavity located between the two vertical insulating plates is a confluence air duct, and the other two sub-cavities are used for placing power units; a plurality of unit ventilation parts are arranged on the vertical insulating plate, and a plurality of ventilation filter screens are arranged on the cabinet surface of the cabinet body; the air suction assembly is arranged at the top of the cabinet body and communicates with the first main cavity and the second main cavity. Cold air enters from the ventilation filter screen, passes through the power unit and then enters the confluence air duct through the unit ventilation part, and hot air is efficiently sucked out through the air suction assembly. The problems that in the prior art, the power units are arranged in a linear mode, integration is poor, the arrangement structure of a heat dissipation assembly matched with the power units is complex, and heat dissipation cost is high are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, and particularly relates to a high-power compact integrated high-voltage frequency converter device. BACKGROUND

[0002] The high-voltage frequency converter device is generally composed of a phase-shifting transformer, a power unit, a cooling fan, a control cabinet and the like. The prior art has the following defects:

[0003] In the market common high-power high-voltage frequency converter device, the power units are large in quantity and volume, and are generally arranged in a line, which is relatively scattered, and the cooling structure matched with the power units is complex in arrangement, resulting in low cooling efficiency and wide overall size, and is not easy to transport. SUMMARY

[0004] Embodiments of the present application provide a high-power compact integrated high-voltage frequency converter device to solve the problem of the power units arranged in a line, scattered layout, poor integration, and the cooling assembly matched with the power units complex in arrangement structure in the related art, resulting in high cooling cost.

[0005] A high-power compact integrated high-voltage frequency converter device is provided, which includes a cabinet body, a first partition plate is arranged in the cabinet body to divide the cabinet body into a first main cavity and a second main cavity; a phase-shifting transformer is arranged in the first main cavity, and two vertical insulation plates spaced apart from each other and connected with the first partition plate are arranged in the second main cavity to divide the second main cavity into three sub-cavities, the sub-cavity between the two vertical insulation plates is a confluence air duct, and the other two sub-cavities are used for placing power units; a plurality of unit ventilation parts are arranged on the vertical insulation plates, and a plurality of ventilation filter screens are arranged on the cabinet face of the cabinet body; and an air suction assembly is arranged on the top of the cabinet body and communicates with the first main cavity and the second main cavity respectively.

[0006] In some embodiments, the sub-cavities on both sides of the confluence air duct are a first chamber and a second chamber respectively; a vertical plate perpendicular to the vertical insulation plate is arranged in the first chamber to divide the first chamber into two spaces, one of which is a third chamber close to the first partition plate, and the other is a fourth chamber; the third chamber is used for placing power units, and the fourth chamber is used for placing a main control cabinet.

[0007] In some embodiments, the air suction assembly includes a first air suction fan and a second air suction fan; the first air suction fan is located above the first main cavity and communicates with the first main cavity; and the second air suction fan is located above the third chamber and the second chamber and communicates with the confluence air duct.

[0008] In some embodiments, the rectangular surrounding plate air duct is further included; a plurality of cylindrical barrel air ducts are arranged in the first cavity, and the windings of the phase-shifting transformer are arranged in the cylindrical barrel air ducts and leave a ventilation cavity inside; the rectangular surrounding plate air duct is arranged on the top of the cylindrical barrel air duct and is in communication with the ventilation cavity; and the top surface of the rectangular surrounding plate air duct is attached to the top surface of the cabinet and is in communication with the first air suction fan.

[0009] In some embodiments, the cylindrical barrel air duct is made of an epoxy resin plate.

[0010] In some embodiments, a plurality of first horizontal plates perpendicular to the vertical insulation plates are arranged on the vertical insulation plates in the third cavity and close to the vertical insulation plates, and a plurality of power units are arranged on the first horizontal plates, respectively; a plurality of second horizontal plates perpendicular to the vertical insulation plates are arranged on the vertical insulation plates in the second cavity and close to the vertical insulation plates, and a plurality of power units are arranged on the second horizontal plates, respectively.

[0011] In some embodiments, the unit ventilation part includes a plurality of perforations.

[0012] In some embodiments, a plurality of cable threading holes are arranged on the first partition plate for threading cables; and a plurality of low-voltage pre-charging resistors are arranged on the first partition plate and connected with the phase-shifting transformer.

[0013] In some embodiments, a plurality of ventilation filter screens are arranged on the cabinet surface parallel to the vertical insulation plates.

[0014] In some embodiments, a voltage dividing and sampling plate and a wiring copper bar are further arranged on the cabinet, and the voltage dividing and sampling plate is connected with the wiring copper bar correspondingly; the voltage dividing and sampling plate is connected with the phase-shifting transformer, and the wiring copper bar is connected with the corresponding power unit.

[0015] The technical scheme provided in the application has the following beneficial effects:

[0016] The embodiment of the application provides a high-power compact integrated high-voltage frequency converter device, wherein the phase-shifting transformer and the power unit are designed and integrated in the cabinet, which can be more easily transported and installed, can more effectively concentrate heat dissipation, improve heat dissipation efficiency, reduce the use of heat dissipation components, and thus reduce costs; the first partition plate divides the space inside the cabinet into different cavities to realize compact layout and cavity management of the high-voltage frequency converter; the vertical insulation plates are arranged mainly to place the power units in two parts, and the space between the two vertical insulation plates forms a converging air duct; and through the design of the unit ventilation part and the ventilation filter screen, cold air enters the converging air duct through the ventilation filter screen, passes through each power unit, enters the converging air duct through the unit ventilation part, and is efficiently sucked out of the converging air duct by the air suction assembly; thus, the problem of one-dimensional arrangement, scattered layout, poor integration of the power unit in the related art, and the resulting complex arrangement structure of the heat dissipation components cooperating with the power unit, which leads to high heat dissipation cost, is solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the heat dissipation structure of the power unit provided in an embodiment of this application;

[0019] Figure 2 This is a top view of the high-voltage frequency converter device provided in the embodiments of this application;

[0020] Figure 3 This is a front view structural diagram of the high-voltage frequency converter device provided in the embodiments of this application;

[0021] Figure 4 This is a rear view structural diagram of the high-voltage frequency converter device provided in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the phase-shifting transformer structure provided in an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the main chamber structure without a power unit provided in an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the second chamber structure without a power unit provided in an embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the second chamber structure after the power unit is placed, provided in an embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the main chamber structure after the controller and power unit are placed, provided in an embodiment of this application.

[0027] Figure 10 This is a schematic diagram of the first partition structure provided in an embodiment of this application;

[0028] Figure 11 This is a schematic diagram showing the arrangement of the voltage divider sampling board and the copper busbar provided in the embodiments of this application;

[0029] Figure 12 This is a schematic diagram showing the distribution of a high-voltage frequency converter device provided in an embodiment of this application.

[0030] In the diagram: 1. Cabinet; 2. First partition; 21. Wiring hole; 3. Phase-shifting transformer; 31. Cylindrical air duct; 32. Rectangular enclosure air duct; 33. First wiring section; 34. Second wiring section; 4. Vertical insulation board; 41. First horizontal plate; 42. Second horizontal plate; 43. Unit ventilation section; 5. Combining air duct; 6. First chamber; 61. Third chamber; 62. Second chamber; 63. Fourth chamber; 7. Power unit; 8. Suction assembly; 81. First suction fan; 82. Second suction fan; 9. Ventilation filter; 10. Low-voltage pre-charge resistor; 11. Voltage divider sampling board; 12. Wiring copper busbar. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] This application provides a high-power, compact, integrated high-voltage frequency converter device, which can solve the problems in related technologies where power units are arranged in a line, have a scattered layout, poor integration, and consequently, the heat dissipation components that work with them have a complex arrangement structure, resulting in high heat dissipation costs.

[0033] Since the power units 7 in common high-power high-voltage frequency converter devices on the market are numerous and large in size, and the power units 7 are generally arranged in a line with a relatively scattered layout, resulting in a complex heat dissipation structure, low heat dissipation efficiency, and large overall size, making them difficult to transport, an integrated high-voltage frequency converter device is designed to integrate the power units 7 and integrate them with the phase-shifting transformer 3. On the one hand, this can reduce the space required for layout, facilitate transportation and installation, and on the other hand, improve the heat dissipation efficiency of the power units 7.

[0034] refer to Figures 1-11 ,in Figure 1This is a schematic diagram of the heat dissipation structure of the power unit in an embodiment of this application; a high-power compact integrated high-voltage frequency converter device includes: a cabinet 1, which has a first partition 2 inside to divide the cabinet 1 into a first main cavity and a second main cavity; a phase-shifting transformer 3 is provided in the first main cavity, and two vertical insulating plates 4 are provided in the second main cavity at intervals and connected to the first partition 2 to divide the second main cavity into three sub-cavities, the sub-cavity between the two vertical insulating plates 4 is a converging air duct 5, and the other two sub-cavities are used to place the power unit 7; the vertical insulating plate 4 is provided with multiple unit ventilation parts 43, and the cabinet surface of the cabinet 1 is provided with multiple ventilation filters 9; an air suction assembly 8 is provided on the top of the cabinet 1 and is connected to the first main cavity and the second main cavity respectively.

[0035] With this structural design, the cabinet 1 serves as the skeleton of the entire device, providing structural support and protection, and facilitating overall transportation; the first partition 2 divides the cabinet 1 into a first main cavity and a second main cavity. The first main cavity is mainly used to accommodate the phase-shifting transformer 3, while the second main cavity accommodates the power unit 7. This separation not only rationally allocates space but also effectively reduces interference between different parts. The phase-shifting transformer 3 is used to change the voltage and phase, thereby regulating the power. By integrating the phase-shifting transformer 3 and the power unit 7 into the cabinet 1, it is easier to transport and install, and it can more effectively concentrate heat dissipation, improve heat dissipation efficiency, reduce the use of heat dissipation components, and thus reduce costs. The first partition 2 divides the internal space of the cabinet into different cavities to achieve a compact layout and separate management of the high-voltage frequency converter. The vertical insulation plate 4 is mainly set to place the power unit 7 in two parts. The space between the two vertical insulation plates 4 forms a converging air duct 5. Through the design of the unit ventilation section 43 and the ventilation filter 9, the cold air enters through the ventilation filter 9, passes through each power unit 7, and enters the converging air duct 5 through the unit ventilation section 43. The air is then efficiently drawn out of the converging air duct 5 by the suction component 8. This solves the problem in related technologies where the power unit 7 is arranged in a line, has a scattered layout, poor integration, and a complex heat dissipation component arrangement, resulting in high heat dissipation costs.

[0036] In some preferred embodiments, the sub-cavities on both sides of the duct 5 are the first chamber 6 and the second chamber 62, respectively; the first chamber 6 is also provided with a vertical plate perpendicular to the vertical insulating plate 4 to divide the first chamber 6 into two spaces, wherein the space near the first partition plate 2 is the third chamber 61 and the other space is the fourth chamber 63; the third chamber 61 is used to place the power unit 7 and the fourth chamber 63 is used to place the main control cabinet.

[0037] In this embodiment, a first chamber 6 and a second chamber 62 are provided on both sides of the converging air duct 5, providing a more flexible spatial layout. A vertical plate within the first chamber 6 further divides the chamber into two spaces: a third chamber 61 and a fourth chamber 63. This structural design ensures the independence of the power unit 7 and the control system. The third chamber 61 and the second chamber 62 are specifically designed to house the power unit 7, optimizing its arrangement, improving heat dissipation, and optimizing the overall structural dimensions.

[0038] In some preferred embodiments, the suction assembly 8 includes a first suction fan 81 and a second suction fan 82; the first suction fan 81 is located above and communicates with the first main chamber; the second suction fan 82 is located above the third chamber 61 and the second chamber 62, and communicates with the converging air duct 5.

[0039] In this embodiment, the first suction fan 81 is located above the first main chamber and is directly connected to it. This layout can effectively extract hot air from the first chamber, ensuring that the power unit 7 can effectively dissipate heat when working under high load, guiding hot air to be discharged outward, promoting airflow, and reducing the overall temperature of the equipment. The second suction fan 82 is located above the third chamber 61 and the second chamber 62 and is connected to the converging air duct 5. This design can further enhance the airflow capability. The second suction fan 82 can extract hot air from the two chambers flowing into the converging air duct 5, forming a good convection circulation.

[0040] In some preferred embodiments, a rectangular enclosure air duct 32 is also included; the first cavity is provided with a plurality of cylindrical air ducts 31 made of epoxy resin board, the windings of the phase-shifting transformer 3 are correspondingly arranged in the cylindrical air ducts 31, and a ventilation cavity is left inside; the rectangular enclosure air duct 32 is arranged on the top of the cylindrical air duct 31 and communicates with the ventilation cavity; the top surface of the rectangular enclosure air duct 32 is attached to the top surface of the cabinet 1 and communicates with the first suction fan 81.

[0041] In this embodiment, the rectangular enclosure air duct 32 is directly connected to the ventilation cavity inside the winding. This design allows for the effective extraction of hot air generated inside the winding, forming a good heat dissipation channel. The top surface of the rectangular enclosure air duct 32 is close to the top surface of the cabinet 1. This structure can prevent air leakage and ensure efficient and smooth airflow. The rectangular enclosure air duct 32 can guide air out of the ventilation cavity of the cylindrical air duct 31 and efficiently exhaust hot air through direct connection with the first suction fan 81. The design of the cylindrical air duct 31 as a ventilation cavity makes heat dissipation more efficient.

[0042] In some preferred embodiments, the cylindrical air duct 31 is made of epoxy resin board.

[0043] In this embodiment, epoxy resin is an excellent electrical insulating material, suitable for use in high-voltage environments. It has strong chemical resistance and can maintain stability in harsh environments. This material is relatively lightweight, which can reduce the overall weight of the equipment. At the same time, it has high strength, which increases the durability of the equipment. Epoxy resin is easy to mold and can be made into various shapes according to specific design requirements. Using epoxy resin helps to ensure the circuit safety of the equipment and reduce the risk of short circuits and electric shock.

[0044] In some preferred embodiments, a plurality of first horizontal plates 41 perpendicular to the vertical insulating plate 4 are provided on the vertical insulating plate 4 inside and near the third chamber 61, and a plurality of power units 7 are respectively provided on the first horizontal plates 41; a plurality of second horizontal plates 42 perpendicular to the vertical insulating plate 4 are provided on the vertical insulating plate 4 inside and near the second chamber 62, and a plurality of power units 7 are respectively provided on the second horizontal plates 42.

[0045] In this embodiment, within the third chamber 61, multiple first horizontal plates 41 are vertically arranged on the vertical insulating plate 4. These horizontal plates provide stable mounting bases for the power units 7, ensuring their stability and precise positioning. Similarly, within the second chamber 62, second horizontal plates 42 are also arranged perpendicular to the vertical insulating plate 4, providing support for the corresponding power units 7. It should be noted that the number of first horizontal plates 41 and second horizontal plates 42 can be adjusted according to actual conditions to accommodate the placement of multiple power units 7.

[0046] In some preferred embodiments, the unit ventilation section 43 includes a plurality of perforations.

[0047] In this embodiment, the unit ventilation section 43 can be provided with perforations of different sizes and shapes in order to optimize airflow to the greatest extent. It should be noted that the unit ventilation section 43 can be set one-to-one with the arrangement position of the power unit 7, so as to better discharge the airflow passing through the power unit 7 into the converging air duct 5.

[0048] In some preferred embodiments, the first partition 2 is provided with a plurality of wire holes 21 for threading cables; the first partition 2 is provided with a plurality of low-voltage pre-charge resistors 10.

[0049] In this embodiment, the cable through-hole 21 allows the cables connecting the power unit 7 and the phase-shifting transformer 3 to pass neatly through the first partition 2, thereby establishing an electrical connection. This design makes cable management more efficient and reduces messy wiring. The position and number of through-holes 21 can be adjusted according to actual needs to meet the cable requirements of different application scenarios. The low-voltage pre-charge resistor is designed to control the current inflow and prevent damage to equipment or components from instantaneous current surges. This is particularly critical in high-power systems, effectively extending the equipment's lifespan. A properly configured low-voltage pre-charge resistor 10 helps to smooth the charging process, reducing voltage and current fluctuations, thereby ensuring the stability of the equipment during startup and operation.

[0050] In some preferred embodiments, a plurality of ventilation filters 9 are provided on the cabinet 1, parallel to the vertical insulating plate 4.

[0051] In this embodiment, the ventilation filter 9 is placed on the cabinet 1 parallel to the vertical insulation plate 4. This is mainly to adapt to the application of this embodiment. Cold air is introduced into the interior from all sides through the ventilation filter 9 to cool the components, and then the hot air is drawn out in conjunction with the suction component 8.

[0052] In some preferred embodiments, the cabinet 1 is also provided with a voltage divider sampling board 11 and a wiring copper busbar 12.

[0053] In this embodiment, the main function of the voltage divider sampling board 11 is to monitor and sample the voltage in the circuit system, and to reflect any abnormalities in a timely manner, which helps to prevent circuit failures. The copper busbar 12 is an important connecting element for wiring. It has good conductivity, which can effectively reduce the contact resistance in the connection, improve the efficiency of power transmission, and reduce heat generation. The centralized connection design makes the wiring simpler, which helps to reduce confusion and improve the convenience of maintenance and repair.

[0054] The above describes the layout of the device. A specific embodiment will be given below, including the integration and circuit connection of the power unit 7, the phase-shifting transformer 3, the main control cabinet and the cabinet 1.

[0055] The first main chamber of cabinet 1 houses the phase-shifting transformer cabinet, and the phase-shifting transformer 3 is placed inside the phase-shifting transformer cabinet. The third chamber 61 houses the three-unit cabinet, which is divided into three layers, with three power units 7 placed on each layer, as described in detail below. The second chamber 62 houses the five-unit cabinet, which is divided into three layers, with five power units 7 placed on each layer, as described in detail below. The fourth chamber 63 houses the main control cabinet.

[0056] Six voltage divider sampling boards 11 are installed on the cabinet 1. Six copper busbars 12 are connected to the voltage divider sampling boards 11 respectively. The six copper busbars are three three-phase output busbars and three three-phase input busbars. The three three-phase input busbars are connected to the second wiring section 34 on the phase shifting transformer 3.

[0057] The first connection section 33 of the phase-shifting transformer 3 is divided into two parts: one part is on the front, which has 9*3 690V output terminals, and the other part is on the back, which has 15*3 690V output terminals. The three-unit cabinet, i.e., the third chamber 61, has three first horizontal plates 41, each holding three power units 7, for a total of nine power units 7. The five-unit cabinet, i.e., the second chamber 62, has three second horizontal plates 42, each holding five power units 7, for a total of fifteen power units. Each power unit 7 is labeled with a different letter, for a total of 24 power units 7. See details... Figure 8 and Figure 9 The system is divided into three layers: Layer A, Layer B, and Layer C. Each power unit 7 has terminals: CL1, CL2, and a main terminal. In Layer A, CL2 of A1 is connected to CL1 of A2, CL2 of A2 is connected to CL1 of A3, CL2 of A3 is connected to CL1 of A4, and so on, with CL2 of A7 connected to CL1 of A8, all via copper busbars or cables. Layers B and C are connected to Layer A in the same way. Finally, CL1 of A1 is connected to CL1 of B1, and CL1 of B1 is connected to CL1 of C1 via high-voltage cables. Finally, CL2 of A8, CL2 of B8, and CL2 of C8 are connected to the three three-phase output terminals on the cabinet 1 via cables.

[0058] The beneficial effects of this utility model include:

[0059] A high-power, compact, integrated high-voltage frequency converter device is provided. The cabinet 1 serves as the skeleton of the entire device, providing structural support and protection, and facilitating overall transportation. The first partition 2 divides the cabinet 1 into a first main cavity and a second main cavity. The first main cavity is mainly used to accommodate the phase-shifting transformer 3, while the second main cavity accommodates the power unit 7. This separation not only rationally allocates space but also effectively reduces interference between different parts. The phase-shifting transformer 3 is used to change the voltage and phase, thereby regulating the power. By integrating the phase-shifting transformer 3 and the power unit 7 into the cabinet 1, it is easier to transport and install, and it can more effectively concentrate heat dissipation, improve heat dissipation efficiency, reduce the use of heat dissipation components, and thus reduce costs. The first partition 2 divides the internal space of the cabinet into different cavities to achieve a compact layout and separate management of the high-voltage frequency converter. The vertical insulation plate 4 is mainly set to place the power unit 7 in two parts. The space between the two vertical insulation plates 4 forms a converging air duct 5. Through the design of the unit ventilation section 43 and the ventilation filter 9, the cold air enters through the ventilation filter 9, passes through each power unit 7, and enters the converging air duct 5 through the unit ventilation section 43. The air is then efficiently drawn out of the converging air duct 5 by the suction component 8. This solves the problem in related technologies where the power unit 7 is arranged in a line, has a scattered layout, poor integration, and a complex heat dissipation component arrangement, resulting in high heat dissipation costs.

[0060] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0061] It should be noted that in this application, relational terms such as "first" and "second" are used merely 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.

[0062] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. 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 this application. Therefore, this application 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 claimed herein.

Claims

1. A high-power, compact, integrated high-voltage frequency converter device, characterized in that, It includes: The cabinet (1) has a first partition (2) inside to divide the cabinet (1) into a first main cavity and a second main cavity; The first main cavity is equipped with a phase-shifting transformer (3), and the second main cavity is equipped with two vertical insulating plates (4) that are spaced apart and connected to the first partition plate (2) to divide the second main cavity into three sub-cavities. The sub-cavity between the two vertical insulating plates (4) is a converging air duct (5), and the other two sub-cavities are used to place power units (7). The vertical insulating plates (4) are equipped with multiple unit ventilation parts (43), and the cabinet surface of the cabinet (1) is equipped with multiple ventilation filters (9). The suction assembly (8) is located on the top of the cabinet (1) and is connected to the first main cavity and the second main cavity respectively.

2. The high-power, compact, integrated high-voltage frequency converter device as described in claim 1, characterized in that: The sub-cavities on both sides of the confluence air duct (5) are the first chamber (6) and the second chamber (62), respectively. The first chamber (6) is provided with a vertical plate perpendicular to the vertical insulating plate (4) to divide the first chamber (6) into two spaces, wherein the space near the first partition plate (2) is the third chamber (61) and the other space is the fourth chamber (63); the third chamber (61) is used to place the power unit (7) and the fourth chamber (63) is used to place the main control cabinet.

3. The high-power, compact, integrated high-voltage frequency converter device as described in claim 2, characterized in that: The suction assembly (8) includes a first suction fan (81) and a second suction fan (82); The first suction fan (81) is located above and connected to the first main cavity; The second suction fan (82) is located above the third chamber (61) and the second chamber (62) and is connected to the confluence air duct (5).

4. The high-power, compact, integrated high-voltage frequency converter device as described in claim 3, characterized in that: It also includes rectangular enclosure air ducts (32); The first chamber (6) is provided with multiple cylindrical air ducts (31), the windings of the phase-shifting transformer (3) are correspondingly arranged in the cylindrical air ducts (31), and a ventilation cavity is left inside. The rectangular enclosure air duct (32) is located at the top of the cylindrical air ducts (31) and is connected to the ventilation cavity. The top surface of the rectangular enclosure air duct (32) is attached to the top surface of the cabinet (1) and is connected to the first suction fan (81).

5. The high-power compact integrated high-voltage frequency converter device as described in claim 4, characterized in that: The cylindrical air duct (31) is made of epoxy resin board.

6. The high-power compact integrated high-voltage frequency converter device as described in claim 2, characterized in that: The third chamber (61) is located on the vertical insulating plate (4) near it, and a plurality of first horizontal plates (41) perpendicular to the vertical insulating plate (4) are provided, and a plurality of power units (7) are respectively provided on the first horizontal plates (41); The second chamber (62) is located on the vertical insulating plate (4) near it, and a plurality of second horizontal plates (42) perpendicular to the vertical insulating plate (4) are provided, and a plurality of power units (7) are respectively provided on the second horizontal plates (42).

7. The high-power, compact, integrated high-voltage frequency converter device as described in claim 6, characterized in that: The unit ventilation section (43) includes multiple perforations.

8. The high-power, compact, integrated high-voltage frequency converter device as described in claim 1, characterized in that: The first partition (2) is provided with a plurality of wire holes (21) for threading cables; The first partition (2) is provided with a plurality of low-voltage pre-charge resistors (10), which are connected to the phase-shifting transformer (3).

9. The high-power, compact, integrated high-voltage frequency converter device as described in claim 1, characterized in that: On the cabinet (1), a plurality of ventilation filters (9) are provided on the cabinet surface parallel to the vertical insulating plate (4).

10. The high-power, compact, integrated high-voltage frequency converter device as described in claim 1, characterized in that: The cabinet (1) is also provided with a voltage divider sampling board (11) and a wiring copper busbar (12), and the voltage divider sampling board (11) is connected to the wiring copper busbar (12) respectively; The voltage divider sampling board (11) is used to connect to the phase-shifting transformer (3), and the copper busbar (12) is used to connect to the corresponding power unit (7).

Images