Novel power unit

Abstract

The utility model discloses a novel power unit, which belongs to the technical field of frequency converters and comprises a shell, a capacitor plate protective cover and a capacitor plate. The shell is provided with a containing cavity, and a middle partition plate is arranged in the containing cavity in the height direction of the shell. The capacitor plate protective cover is located in the containing cavity and detachably installed on one side of the middle partition plate. The capacitor plate comprises a first capacitor plate and a second capacitor plate, the first capacitor plate and the second capacitor plate are arranged in a manner that substrates are opposite and electrolytic capacitors are deviated from each other, the first capacitor plate and the second capacitor plate are horizontally arranged at the lower part of the accommodating cavity, and the substrate of the printed board is attached to the metal terminal and is connected with the metal terminal through a detachable screw. According to the utility model, the capacitor plate is arranged in the shell in a horizontal manner, the internal space of the shell is utilized to the greatest extent, meanwhile, the substrate of the printed board is electrically connected with the metal terminals in a fitting manner, a conducting bar or a cable is omitted, and the unit is small in size, light in weight, low in production cost and suitable for power units of various types of shells.

Description

Technical Field

[0001] The utility model relates to a novel power unit, belonging to the technical field of frequency converters. Background Art

[0002] A high-voltage frequency converter includes a transformer cabinet, a power cabinet, and a control cabinet. The industrial frequency power supply provided by the power grid is rectified, inversely controlled, and adjusted by the high-voltage frequency converter, and then outputs a voltage level and frequency that meet the load requirements. The power unit is an important component of the high-voltage frequency converter that uses power electronic devices for rectification, filtering, and inversion, and is the main part of the main circuit of the high-voltage frequency converter. The filtering circuit of the power unit uses filter capacitors connected in parallel at the output end of the rectifier power supply circuit to filter the direct current after rectification by the rectifier bridge.

[0003] Currently, the shells of most power units are made of all sheet metal, a combination of sheet metal and plastic, or all plastic. The filtering circuit uses multiple filter capacitors connected in parallel in multiple rows, or multiple filter capacitors are arranged side by side and integrated into a printed circuit board, which is assembled into the power unit shell in a vertical orientation, and copper parts or cables are used for wiring. The number and volume of the filter capacitors in this structure affect the volume and weight of the power unit, and also affect the volume and cost of the high-voltage frequency converter, the floor area of the equipment, and the land use cost. This impact is more obvious in the structural design of high-power power units. Content of the Utility Model

[0004] In view of the above, the utility model provides a novel power unit to solve the problems of volume, weight, and cost existing in the above-mentioned prior art, and is applicable to power units of various types of shells.

[0005] To achieve the above object, the utility model provides a novel power unit, including: a shell, a capacitor board protective cover, and a capacitor board. The shell has a receiving cavity, and a middle partition is provided in the receiving cavity along the height direction of the shell; the capacitor board protective cover is used to protect the capacitor board, is located in the receiving cavity, and is detachably installed on one side of the middle partition; the capacitor board is a printed circuit board, is provided at the lower part in the receiving cavity, and is installed in the capacitor board protective cover.

[0006] Further, the capacitor board protective cover includes a first protective cover and a second protective cover. The first protective cover is provided with a cavity and a capacitor avoidance hole, and the second protective cover is provided with a capacitor avoidance hole and a support column. The first protective cover is fitted and installed with the middle partition, and the second protective cover is detachably installed vertically above the first protective cover. An installation cavity is formed between the second protective cover and the first protective cover for installing the capacitor board.

[0007] Further, the capacitor plate includes a first capacitor plate and a second capacitor plate. The first capacitor plate includes a first substrate, a plurality of electrolytic capacitors provided on the same side of the first substrate, and one or more first metal terminals. The second capacitor plate includes a second substrate and a plurality of electrolytic capacitors provided on the second substrate. A capacitor avoidance hole is provided in the lower part of the middle partition plate. The first capacitor plate and the second capacitor plate are arranged with the substrates facing each other and the electrolytic capacitors facing away from each other. The first capacitor plate is located inside the first protective cover, and its electrolytic capacitors pass through the capacitor avoidance holes of the first protective cover to the outside of the first protective cover. The second capacitor plate is installed inside the second protective cover, and its electrolytic capacitors pass through the capacitor avoidance holes of the second protective cover and the middle partition plate to the other side of the middle partition plate.

[0008] Further, the second capacitor plate further includes one or more second metal terminals provided on the second substrate opposite to the electrolytic capacitors. The first substrate of the first capacitor plate is attached to the second metal terminals of the second capacitor plate and is connected by detachable screws.

[0009] Further, the middle partition plate is further provided with mounting posts, and the first protective cover is provided with positioning holes corresponding to the mounting posts, and the mounting posts penetrate into the positioning holes.

[0010] Further, the power unit further includes a power board. The power board is provided in the upper part of the housing accommodation cavity, on the same side as the first capacitor plate, and is detachably fixed to the middle partition plate. The power board includes a substrate, and its substrate is connected to the first metal terminals of the first capacitor plate.

[0011] Further, heat dissipation through holes penetrating the front wall are provided in the upper and lower parts of the front wall of the housing, and heat dissipation through holes penetrating the rear wall are provided in the upper and lower parts of the rear wall.

[0012] Further, the power unit further includes a plastic front cover. The plastic front cover is provided outside the housing and is detachably fixed to the front end of the housing. Through holes corresponding to the heat dissipation through holes of the housing are provided in the plastic front cover, and a heat dissipation channel is formed through the heat dissipation through holes among the plastic front cover, the housing, and the capacitor plate to support heat dissipation of the capacitor plate.

[0013] Further, the power unit further includes a radiator. The radiator is provided in the upper part of the housing accommodation cavity, on the same side as the second capacitor plate, and is detachably fixed to the middle partition plate and exposes a heat dissipation surface.

[0014] Further, the housing further includes a partition board for isolating the capacitor plate and the capacitor plate protective cover, which is provided in the accommodation cavity and is located above the capacitor plate and the capacitor plate protective cover.

[0015] The beneficial effects of the present utility model are as follows: The first capacitor plate and the second capacitor plate are arranged oppositely and are installed inside the housing in a horizontal lying manner, maximizing the use of the internal space of the housing. At the same time, the electrical connection is realized by the way of attaching the substrate of the printed circuit board to the metal terminals, eliminating the need for conductive bars or cables. The power unit is small in volume, light in weight, and low in production cost. Description of the Drawings

[0016] The following further elaborates on the present utility model in detail in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a three-dimensional schematic diagram of the present utility model without side plates;

[0018] Figure 2 It is another three-dimensional schematic diagram of the present utility model without side plates from a different angle;

[0019] Figure 3 It is a schematic diagram of the middle partition plate and the capacitor plate protective cover structure of the present utility model;

[0020] Figure 4 It is a schematic diagram of the middle partition plate, the capacitor plate protective cover and the capacitor plate structure of the present utility model;

[0021] Figure 5 It is a schematic diagram of the housing and plastic panel structure of the present utility model;

[0022] Figure 6 It is a schematic diagram of the first capacitor plate and the second capacitor plate structure of the present utility model.

[0023] Reference numerals: housing 1; capacitor plate protective cover 2; capacitor plate 3; plastic front shell 4; middle partition plate 5; power board 6; electrolytic capacitor 7; first substrate 8; first metal terminal 9; second substrate 10; second metal terminal 11; first protective cover 12; second protective cover 13; isolation board 14; first capacitor plate 15; second capacitor plate 16; mounting post 17; radiator 18. Specific embodiments

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] As Figures 1 to 6 shown, the present utility model provides a new type of power unit, including: housing 1, capacitor plate protective cover 2, capacitor plate 3, plastic front shell 4, power board 6, radiator 18. The housing 1 can be designed as a sheet metal housing or a plastic housing. In this embodiment, the housing 1 is a sheet metal housing. The housing 1 has a receiving cavity, and a middle partition plate 5 is provided in the receiving cavity along the height direction of the housing 1. The capacitor plate protective cover 2 is located in the receiving cavity and is detachably mounted on one side of the middle partition plate 5 for protecting the capacitor plate 3. The capacitor plate 3 is an integrated printed board and is provided at the lower part of the receiving cavity and is installed in the capacitor plate protective cover 2. The lower part of the middle partition plate 5 is provided with capacitor avoidance holes and mounting posts 17. All the capacitor avoidance holes in this embodiment are through holes.

[0026] The housing 1 is also provided with a partition board 14, which is arranged in the accommodation cavity and is located above the capacitor plate 3 and the capacitor plate protective cover 2. The partition board 14 is used to isolate the capacitor plate 3 and the capacitor plate protective cover 2 to meet the requirements of a high protection level.

[0027] As Figure 3 , Figure 5 shown, the capacitor plate protective cover 2 includes a first protective cover 12 and a second protective cover 13. The first protective cover 12 is provided with a cavity and a capacitor avoidance hole, and a positioning hole is provided corresponding to the position of the mounting post 17 of the middle partition board 5. The second protective cover 13 is provided with a capacitor avoidance hole and a support post, and the position of the support post corresponds to the position of the mounting post 17.

[0028] As Figure 4 , Figure 6 shown, the capacitor plate 3 includes a first capacitor plate 15 and a second capacitor plate 16. The first capacitor plate 15 includes a first substrate 8, and a plurality of electrolytic capacitors 7 and one or more first metal terminals 9 arranged on the same side of the first substrate 8. The second capacitor plate 16 includes a second substrate 10, and a plurality of electrolytic capacitors 7 and one or more second metal terminals 11 arranged on the second substrate 10 and facing away from the electrolytic capacitors 7.

[0029] The capacitor plate protective cover 2 plays a protective role for the capacitor plate 3 to meet the requirements of a high protection level for the first capacitor plate 15 and the second capacitor plate 16.

[0030] In this embodiment, the first protective cover 12 is fitted and installed with the middle partition board 5, and its positioning hole penetrates into the mounting post 17. The second protective cover 13 is detachably installed vertically above the first protective cover 12. The mounting post 17 is mainly used for the mounting and positioning of the first protective cover 12 and the second protective cover 13. An installation cavity is formed between the second protective cover 13 and the cavity of the first protective cover 12, and this installation cavity is used to accommodate the first capacitor plate 15 and the second capacitor plate 16.

[0031] The first capacitor plate 15 and the second capacitor plate 16 are arranged in a horizontal position with the substrates facing each other and the electrolytic capacitors 7 facing away, and are horizontally loaded into the installation cavity. The second capacitor plate 16 is installed in the first protective cover 12, and its electrolytic capacitors 7 pass through the capacitor avoidance holes of the first protective cover 12 and the middle partition board 5 to the other side of the middle partition board 5. The first capacitor plate 15 is located in the second protective cover 13, and its electrolytic capacitors 7 pass through the capacitor avoidance holes of the second protective cover 13 to the outside of the second protective cover 13. The support post mainly plays a supporting and buffering role for the first capacitor plate 15. The first substrate 8 of the first capacitor plate 15 is attached to the second metal terminal 11 of the second capacitor plate 16 and is connected by a detachable screw.

[0032] As Figure 2As shown, the power board 6 is disposed at the upper part of the accommodation cavity of the housing 1, on the same side as the first capacitor board 15, and is detachably fixed to the middle partition board 5. The power board 6 includes a substrate, and the substrate thereof is in contact with the first metal terminal 9 of the first capacitor board 15 to achieve electrical connection.

[0033] As Figure 5 shown, heat dissipation through holes penetrating the front wall are provided at the upper and lower parts of the front wall of the housing 1, and heat dissipation through holes penetrating the rear wall are provided at the upper and lower parts of the rear wall.

[0034] The plastic front shell 4 is a plastic part, disposed outside the housing 1, and is detachably fixed to the front end of the housing 1. Heat dissipation holes penetrating are provided at the positions of the heat dissipation through holes of the housing 1 corresponding to the plastic front shell 4. A heat dissipation channel is formed among the plastic front shell 4, the housing 1 and the capacitor board 3, and the capacitor board 3 is ventilated and cooled through this heat dissipation channel.

[0035] The radiator 18 is disposed at the upper part of the accommodation cavity of the housing 1, on the same side as the second capacitor board 16, and is detachably fixed to the middle partition board 5 and exposes the heat dissipation surface. A heat dissipation channel is formed among the plastic front shell 4, the housing 1 and the radiator 18 to dissipate heat from the electronic devices on the power board 6.

[0036] The first capacitor board and the second capacitor board of the present utility model are arranged oppositely and are installed inside the housing in a horizontal lying manner, maximizing the utilization of the internal space of the housing. At the same time, the substrate of the printed board is in contact with the metal terminal to achieve electrical connection, eliminating the conductive bar or cable, and the power unit has a small volume and a light weight.

[0037] Although the specific embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, it should not be construed as a limitation on the protection scope of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative labor still fall within the protection scope of this patent.

Claims

1. A new type of power unit, comprising: A housing (1), a capacitor plate protective cover (2), and a capacitor plate (3), characterized in that the housing (1) has a receiving cavity, and a middle partition plate (5) is arranged in the receiving cavity along the height direction of the housing (1); the capacitor plate protective cover (2) is used for protecting the capacitor plate (3), is located in the receiving cavity, and is detachably mounted on one side of the middle partition plate (5); the capacitor plate (3) is a printed circuit board, is arranged at the lower part in the receiving cavity, and is installed in the capacitor plate protective cover (2).

2. A novel power unit according to claim 1, characterized in that, The capacitor plate protective cover (2) includes: a first protective cover (12) and a second protective cover (13); the first protective cover (12) is provided with a cavity and capacitor avoidance holes; the second protective cover (13) is provided with capacitor avoidance holes and support columns; the first protective cover (12) is fitted and installed with the middle partition plate (5), the second protective cover (13) is detachably mounted vertically above the first protective cover (12), and an installation cavity is formed between the second protective cover (13) and the first protective cover (12) for installing the capacitor plate (3).

3. A novel power unit according to claim 2, characterized in that, The capacitor plate (3) includes: a first capacitor plate (15) and a second capacitor plate (16); the first capacitor plate (15) includes a first substrate (8), and a plurality of electrolytic capacitors (7) and one or more first metal terminals (9) arranged on the same side of the first substrate (8); the second capacitor plate (16) includes a second substrate (10), and a plurality of electrolytic capacitors (7) arranged on the second substrate (10); a capacitor avoidance hole is provided at the lower part of the middle partition plate (5); the first capacitor plate (15) and the second capacitor plate (16) are arranged with the substrates facing each other and the electrolytic capacitors (7) facing away, the first capacitor plate (15) is located in the first protective cover (12), and its electrolytic capacitors (7) pass through the capacitor avoidance holes of the first protective cover (12) to the outside of the first protective cover (12); the second capacitor plate (16) is installed in the second protective cover (13), and its electrolytic capacitors (7) pass through the capacitor avoidance holes of the second protective cover (13) and the middle partition plate (5) to the other side of the middle partition plate (5).

4. A novel power unit according to claim 3, characterized in that, The second capacitor plate (16) further includes one or more second metal terminals (11) arranged on the second substrate (10) opposite to the electrolytic capacitors (7), and the first substrate (8) of the first capacitor plate (15) is in contact with the second metal terminals (11) of the second capacitor plate (16) and is connected by detachable screws.

5. A novel power unit according to claim 2, characterized in that, The middle partition plate (5) is further provided with installation posts (17), and the first protective cover (12) is provided with positioning holes corresponding to the installation posts (17), and the installation posts (17) penetrate into the positioning holes.

6. A novel power unit according to claim 3, characterized in that, It further includes a power board (6), the power board (6) is arranged at the upper part of the receiving cavity of the housing (1), on the same side as the first capacitor plate (15), and is detachably fixed on the middle partition plate (5); the power board (6) includes a substrate, and the substrate is connected to the first metal terminals (9) of the first capacitor plate (15).

7. A novel power unit according to claim 1, characterized in that, The upper part and the lower part of the front wall of the housing (1) are provided with heat dissipation through holes penetrating the front wall, and the upper part and the lower part of the rear wall are provided with heat dissipation through holes penetrating the rear wall.

8. A novel power unit according to claim 7, characterized in that, It further includes a plastic front shell (4), which is arranged outside the housing (1) and is detachably fixed to the front end of the housing (1). The plastic front shell (4) is provided with through heat dissipation holes corresponding to the positions of the heat dissipation through holes of the housing (1), and a heat dissipation channel is formed through the heat dissipation through holes among the plastic front shell (4), the housing (1) and the capacitor plate (3).

9. A novel power unit according to claim 7, characterized in that, It further includes a radiator (18), which is arranged at the upper part of the accommodation cavity of the housing 1, on the same side as the second capacitor plate (16), and is detachably fixed to the middle partition plate (5) and exposes the heat dissipation surface.

10. A novel power unit according to claim 1, characterized in that, The housing (1) further includes a partition board (14), which isolates the capacitor plate (3) and the capacitor plate protective cover (2), is arranged in the accommodation cavity, and is located above the capacitor plate (3) and the capacitor plate protective cover (2).

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