High-power four-quadrant water-cooling frequency converter unit

Abstract

The utility model relates to a high-power four-quadrant water-cooling frequency converter unit, which consists of a shell, a water-cooling plate assembly, a main control board assembly, a thin-film capacitor, a laminated busbar, a switching power supply assembly, a rectification input bar and an inversion output bar, and is characterized in that the water-cooling plate assembly and the thin-film capacitor are respectively arranged at the front part and the rear part above the shell; the device is characterized in that the water cooling plate assembly is composed of a water cooling plate, an IGBT module and a driving plate, the rectification input bar is connected with the IGBT module playing a role in rectification, and the inversion output bar is connected with the IGBT module playing a role in inversion. According to the high-power four-quadrant water-cooling frequency converter unit, the structure of the frequency converter unit is very compact, and miniaturization of the frequency converter unit is facilitated; the plurality of IGBT modules on the water cooling plate realize the functions of arrangement and inversion, and compared with the existing mode of independently arranging a rectification and feedback unit, the cost of the frequency converter unit is reduced, and further miniaturization of the frequency converter unit is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a frequency converter unit, more specifically, relates to a high -power four quadrant water -cooled frequency converter unit. BACKGROUND

[0002] In recent years, along with the increasing of high power load, the market demand for high power high voltage frequency converter gradually increases, meanwhile, in the field of elevator, hoist, centrifuge, pumping unit, the application of high power four quadrant frequency converter is more and more widely. At present, the development of integrated four quadrant frequency converter of major manufacturers is slightly insufficient, the four quadrant frequency converter on the market is mainly with the scheme of '' rectification + feedback unit'', that is, the rectification part and the inverter part of the frequency converter adopt the mode of independent setting, this setting scheme not only has the natural disadvantages such as high cost, large power fluctuation, unadjustable operation mode, but also due to the independent setting of rectification and inverter part makes the volume of frequency converter unit larger, is not favorable to the miniaturization development of frequency converter, therefore, a new high power unit is urgently needed to make up for the vacancy in the field. SUMMARY

[0003] The utility model discloses a high -power four quadrant water -cooled frequency converter unit to overcome the shortcoming of above -mentioned technical problem.

[0004] The utility model discloses a high -power four quadrant water -cooled frequency converter unit, and the frequency converter unit is by shell, water -cooled plate subassembly, main control board subassembly, film capacitor, laminated busbar, switching power supply subassembly, rectification input row and inverter output row constitutes, and water -cooled plate subassembly and film capacitor are set up respectively in the front and rear of the top of shell, and laminated busbar is fixed in the top of film capacitor, and the laminated busbar is fixed with absorption capacitor;Its characterized in that: water -cooled plate subassembly is by water -cooled plate and fixed on the upper surface IGBT module and drive board of water -cooled plate, and IGBT module plays rectification and inverter effect, and rectification input row is connected with the IGBT module playing rectification effect, and inverter output row is connected with the IGBT module playing inverter effect;Main control board subassembly is vertically installed in the front of the top of shell, and switching power supply subassembly is fixed in the inside of shell lateral wall.

[0005] The utility model discloses a high -power four quadrant water -cooled frequency converter unit, the below of water -cooled plate subassembly is cavity, and the below cavity of water -cooled plate subassembly is provided with mechanical bypass module, and mechanical bypass module is by support frame, transformer, contactor and two internal bypass row constitutes, and support frame is fixed on the shell, and contactor and transformer are fixed on the support frame, and the inner end of two internal bypasses is fixed on the both ends of the normally open point of contactor, and the outer end of two internal bypass row is connected with inverter output row through external bypass row.

[0006] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, the lower cavity of water cooling plate subassembly is provided with the fuse assembly, and the fuse assembly is constituted by copper row lower support, two fuses, B phase wiring row, two fuse input row and two fuse output row, and two fuse input row is fixed on copper row lower support, and B phase wiring row is fixed on copper row lower support through copper row support board, and the inner end of fuse input row and fuse output row is connected with the upper and lower mouth of fuse, and fuse output row and B phase wiring row are connected with rectification input row.

[0007] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, drive board setting is in the front end of water cooling board upper surface, is provided with drive board wire holder on the drive board, and the main control board subassembly is constituted by main control board, main control installation board and copper row upper support, and main control board and copper row upper support all are fixed on main control installation board, and the upper end of main control board is provided with the main control board wire holder that is connected with drive board wire holder, and rectification input row and inverter output row all are fixed on copper row upper support.

[0008] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, and the external bypass row and rectification input row are all detachable form, and after the external bypass row and rectification input row are detached, realize the dismounting and installation of main control board subassembly.

[0009] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, and the periphery of water cooling plate subassembly is provided with the upper protective cover of protection, and the periphery of main control board subassembly is provided with main control board cover.

[0010] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, and the shunt groove of current diversion is provided on the laminated busbar.

[0011] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, and the switch power supply subassembly is constituted by switch power supply, power supply installation board and power supply support, and switch power supply is fixed on power supply installation board, and power supply support is fixed on the four corners of power supply installation board, and power supply support is installed on the shell, and the position corresponding with switch power supply is provided with the opening on the side of shell.

[0012] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, and the quick plug water cooling connector of circulating cooling water is provided on water cooling board, and the thick film resistance is provided on the lower surface of water cooling board.

[0013] The utility model discloses a high -power four quadrant water -cooling frequency converter unit, and the both ends of the front side of shell are all fixed with the handle.

[0014] The utility model discloses beneficial effect is: the utility model discloses high -power four quadrant water -cooling frequency converter unit is provided with casing, film capacitor, laminated busbar, switching power supply assembly, water -cooling plate subassembly and main control board subassembly, and film capacitor and water -cooling plate subassembly are fixed respectively at the rear and the front of casing top, and main control board subassembly is vertically installed at the front end of casing top, and switching power supply assembly is fixed at the inboard of casing lateral wall, and this layout form makes the structure of frequency converter unit very compact, and it is favorable to the miniaturization of frequency converter unit, and simultaneously, the water -cooling plate of water -cooling plate subassembly is fixed with 5 IGBT modules, and 3 IGBT modules are used to realize rectification, and 2 IGBT modules are used to invert, compared with the form that the present " rectification + feedback unit " is independently arranged, reduces the cost of frequency converter unit, and it is favorable to the further miniaturization of frequency converter unit.

[0015] Further, the mechanical bypass module and the fuse assembly are arranged in the cavity below the water-cooling plate subassembly, do not occupy additional space, the structure space utilization rate is high, the mechanical bypass module is used for realizing the bypass of the fault frequency converter unit, and the frequency converter unit after being bypassed does not affect the normal work of other normal frequency converter units; the fuse assembly is used for realizing the overcurrent protection of the frequency converter unit. Meanwhile, the mechanical bypass module is in detachable form, and users can select and match according to actual needs, and the adaptability is wider.

[0016] Further, the drive board is arranged on the water-cooling plate and close to one end of the main control board subassembly, and the main control board wire seat is arranged at the upper end of the main control board, so that the length of the drive line between the drive board wire seat and the main control board wire seat is minimized, the loss of the drive signal is avoided, and the signal response speed is improved.

[0017] Further, the external bypass row and the rectification input row are in detachable form, so that after the external bypass row and the rectification input row are detached, the main control board subassembly can be disassembled and assembled, and the main control board subassembly can be maintained later.

[0018] Further, the switching power supply assembly is embeddedly installed in the inner side of the casing lateral wall, and the region lateral wall is provided with an opening, so that the switching power supply assembly is exposed, which facilitates later maintenance and repair and ensures heat dissipation of the switching power supply.

[0019] Further, the laminated busbar is provided with a shunt groove, so that the current flows through the film capacitor filter and then enters the IGBT module, and the electrical performance is more excellent.

[0020] Further, the main control board, the quick-insert water-cooling connector and the handle are arranged on the front side of the unit, and the embedded hand structure is arranged around the casing, which facilitates later maintenance and repair, and in addition, the quick-insert water-cooling connector can quickly realize waterway bypass of the unit, and the maintainability is higher. DRAWINGS

[0021] Figure 1 Figure 2 Figure 3 are sectional views of the high-power four-quadrant water-cooled frequency converter unit of the utility model;

[0022] Figure 4

[0023] Figure 5 is a three-dimensional structure diagram of the mechanical bypass module in the utility model;

[0024] Figure 6 Figure 7 are three-dimensional diagrams of the water-cooled plate assembly in the utility model;

[0025] Figure 8 is a three-dimensional diagram of the fuse assembly in the utility model;

[0026] Figure 9 is a three-dimensional diagram of the main control board assembly in the utility model;

[0027] Figure 10 is a three-dimensional diagram of the switching power supply assembly in the utility model;

[0028] Figure 11 is a front view of the laminated busbar in the utility model.

[0029] In the drawing: 1 frequency converter unit, 2 mechanical bypass module, 3 external bypass row, 4 shell, 5 upper protective cover, 6 main control board cover, 7 thin film capacitor, 8 laminated busbar, 9 rectifier input row, 10 inverter output row, 11 fuse assembly, 12 main control board assembly, 13 switching power supply assembly, 14 quick-insert water-cooled connector, 15 handle, 16 water-cooled plate assembly, 17 absorption capacitor, 18 current sensor, 19 support frame, 20 transformer, 21 contactor, 22 internal bypass row, 23 water-cooled plate, 24 IGBT module, 25 drive board, 26 thick film resistor, 27 fuse, 28 fuse input row, 29 fuse output row, 30 B-phase wiring row, 31 copper row support plate, 32 copper row lower support, 33 main control board, 34 main control installation plate, 35 copper row upper support, 36 power supply installation plate, 37 power supply support, 38 switching power supply, 39 drive board wiring seat, 40 main control board wiring seat, 41 shunt groove. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and examples.

[0031] As Figures 1 to 3 ​​​​As shown, the utility model discloses a high -power four quadrant water -cooling frequency converter unit's perspective drawing is given, the frequency converter unit 1 shown by main control board subassembly 12, water cooling plate subassembly 16, film capacitor 7, laminated busbar 8, switching power supply subassembly 13, mechanical bypass module 2 and fuse subassembly 16 constitute, the shell 4 plays fixed and support effect, film capacitor 7 installs at the rear of the top of shell 4, water cooling plate subassembly 16 installs at the front of the top of shell 4, main control board subassembly 12 vertically installs at the front end of the top of shell 4, switching power supply subassembly 13 is fixed at the inside of shell 4 lateral wall, film capacitor 7, water cooling plate subassembly 16, main control board subassembly 12 and switching power supply subassembly 13 this layout form is very compact, is favorable to the miniaturization of frequency converter unit 1.

[0032] Figure 6 And Figure 7 The utility model discloses a water cooling plate subassembly's perspective drawing is given, the water cooling plate subassembly 16 shown by water cooling plate 23 and fixed on the upper surface of water cooling plate IGBT module 24 and drive board 25 constitute, drive board 25 is used for controlling the work of IGBT module 24, the number of IGBT module 24 is 5, wherein, the rectification of 3 IGBT modules 24 in the middle is used, and the rectification and inversion of 2 IGBT modules 24 on both sides are used, that is, the IGBT module 24 of rectification and inversion is fixed on same water cooling plate 23, compared with the form that the existing " rectification + feedback unit " is independently set, reduces the cost of frequency converter unit, is favorable to the further miniaturization of frequency converter unit.

[0033] The switching power supply subassembly 13 shown is embedded in the inside of the lateral wall of shell 4, and the lateral wall of shell 4 is provided with an opening at the position corresponding to switching power supply subassembly 13 to expose switching power supply subassembly 13, which facilitates later maintenance and repair and ensures heat dissipation of the switching power supply. The external bypass row 3 and the rectification input row 9 are both detachable, and since the main control board subassembly 12 is fixed to the inner layer of the external bypass row 3 and the rectification input row 9, the main control board subassembly can be disassembled and assembled after the external bypass row 3 and the rectification input row 9 are disassembled, facilitating later maintenance of the main control board subassembly. The water cooling plate subassembly 16 is peripherally provided with an upper protective cover 5, and the main control board subassembly 12 is peripherally provided with a main control board cover 6, and the upper protective cover 5 and the main control board cover 6 respectively protect the water cooling plate subassembly 16 and the main control board subassembly 12.

[0034] The frequency converter unit 1 is used in a cascaded manner, and when a certain frequency converter unit 1 fails, in order to ensure the normal operation of other non-failed frequency converter units 1, the frequency converter unit 1 of the utility model is provided with a mechanical bypass module 2 for bypassing the failed frequency converter unit 1. As Figure 4As shown in the utility model discloses a high -power four quadrant water -cooling frequency converter unit's sectional view is given, the lower of water cooling plate subassembly 16 is cavity, mechanical bypass module 2 and fuse subassembly 11 all are arranged in the lower cavity of water cooling plate subassembly 16, like this, will not extra occupy space, and the utilization of structural space is high, is favorable to the miniaturization of frequency converter unit 1.

[0035] As Figure 5 As shown in the utility model discloses a mechanical bypass module's perspective view is given, the mechanical bypass module 2 is by support frame 19, transformer 20, contactor 21 and two internal bypass row 22 constitute, support frame 19 is fixed on the shell 4, and transformer 20 and contactor 21 are fixed on support frame 19, and the inner end of two internal bypass row 22 is fixed on the both ends of contactor 21 normally open point, and the outer end of two internal bypass row 22 is connected to inverter output row 10 through external bypass row 3.In the normal working state of frequency converter unit 1, two internal bypass row 22 are in the disconnected state, and frequency converter unit 1 is normally output through inverter output row 10;When frequency converter unit 1 appears the fault, bypass signal is controlled contactor 21 through transformer 20 and makes two internal bypass row 22 connect, at this moment, two inverter output row 10 of frequency converter unit 1 are short-circuited, and the bypass of frequency converter unit 1 is realized.

[0036] As Figure 8 As shown in the utility model discloses a fuse subassembly's perspective view is given, the fuse subassembly 11 is by copper row lower support 32, fuse 27, fuse input row 28, fuse output row 29, B phase wiring row 30 constitute, and the number of fuse input row 28 and fuse output row 29 is two, and copper row lower support 32 is fixed on the shell 4, and fuse input row 28 is fixed on copper row lower support 32, and B phase wiring row 30 is fixed on copper row lower support 32 through copper row support plate 31, and two fuse input row 28 form A phase, B phase wiring row;At the same time, two internal bypass row 22 are also fixed on copper row lower support 32.Fuse input row 28 and fuse output row 29 are fixed on the upper and lower mouth of fuse 27 respectively, and the outer end of fuse output row 29 is connected with rectifier input row 9, like this, when the excessive current of rectifier input row 9, fuse 27 is fused, to realize overcurrent protection.

[0037] As shown in the utility model discloses a high -power four quadrant water -cooling frequency converter unit's sectional view is given, the lower of water cooling plate subassembly 16 is cavity, mechanical bypass module 2 and fuse subassembly 11 all are arranged in the lower cavity of water cooling plate subassembly 16, like this, will not extra occupy space, and the utilization of structural space is high, is favorable to the miniaturization of frequency converter unit 1.

[0038] As Figure 9The diagram shows a perspective view of the main control board assembly of this invention. The main control board assembly 12 consists of a main control board 33, a main control mounting plate 34, and a copper busbar upper bracket 35. The main control board 33 is mounted on the main control mounting plate 34, and the copper busbar upper bracket 35 is fixed to the upper side of the main control mounting plate 24. The rectifier input busbar 9 and the inverter output busbar 10 are both fixed on the copper busbar upper bracket 35. A main control board cable connector 40 is provided at the upper end of the main control board 33, and the drive board 25 is located at the end of the water-cooled plate 23 near the main control board 33. This minimizes the length of the drive line between the drive board cable connector 39 and the main control board cable connector 40, avoids drive signal loss, and improves signal response speed.

[0039] like Figure 10 As shown, the present invention comprises a power supply mounting plate 36, a power supply bracket 37, and a switching power supply 38. The switching power supply 38 is fixed on the power supply mounting plate 36, the power supply bracket 37 is fixed at the four corners of the power supply mounting plate 36, and the power supply bracket 37 is fixed on the housing 4.

[0040] like Figure 11 The figure shows a front view of the stacked busbar in this utility model. The stacked busbar 8 shown has a current distribution groove 41. The current distribution groove 41 ensures that the current flows through the thin film capacitor 7 for filtering before entering the IGBT module 24, resulting in better electrical performance.

Claims

1. A high-power four-quadrant water-cooled frequency converter unit, the frequency converter unit (1) is composed of a shell (4), a water-cooled plate assembly (16), a main control board assembly (12), a film capacitor (7), a laminated busbar (8), a switching power supply assembly (13), a rectifier input bus (9) and an inverter output bus (10), the water-cooled plate assembly and the film capacitor are respectively arranged at the front and rear of the upper part of the shell, the laminated busbar is fixed above the film capacitor, and an absorption capacitor (17) is fixed on the laminated busbar; characterized in that: The water-cooled plate assembly is composed of a water-cooled plate (23) and an IGBT module (24) and a driving plate (25) fixed on the upper surface of the water-cooled plate, the IGBT module functions as a rectifier and an inverter, the rectifier input row is connected with the IGBT module functioning as a rectifier, and the inverter output row is connected with the IGBT module functioning as an inverter; the main control plate assembly is vertically installed at the front end above the shell, and the switching power supply assembly is fixed on the inner side of the side wall of the shell.

2. A high power four-quadrant water-cooled frequency inverter unit according to claim 1, characterized in that: The lower cavity of the water-cooled plate assembly (16) is provided with a mechanical bypass module (2), which is composed of a support frame (19), a transformer (20), a contactor (21) and two internal bypass rows (22), the support frame is fixed on the shell, the contactor and the transformer are fixed on the support frame, the inner ends of the two internal bypass rows are fixed on the two ends of the normally open point of the contactor, and the outer ends of the two internal bypass rows are connected with the inverter output row (10) through an external bypass row (3).

3. A high power four-quadrant water-cooled inverter unit according to claim 2, characterized in that: The lower cavity of the water-cooled plate assembly (16) is provided with a fuse assembly (11), which is composed of a copper row lower support (32), two fuses (27), a B-phase wiring row (30), two fuse input rows (28) and two fuse output rows (29), the two fuse input rows are fixed on the copper row lower support, the B-phase wiring row is fixed on the copper row lower support through a copper row support plate (31), the inner ends of the fuse input rows and the fuse output rows are connected with the upper and lower openings of the fuses, and the fuse output rows and the B-phase wiring row are connected with the rectifier input row (9).

4. A high power four-quadrant water-cooled frequency inverter unit according to claim 1 or 2, characterized in that: The driving plate (25) is arranged at the front end of the upper surface of the water-cooled plate (23), the driving plate is provided with a driving plate wire seat (39), the main control plate assembly (12) is composed of a main control plate (33), a main control installation plate (34) and a copper row upper support (35), the main control plate and the copper row upper support are both fixed on the main control installation plate, the upper end of the main control plate is provided with a main control plate wire seat (40) connected with the driving plate wire seat; the rectifier input row (9) and the inverter output row (10) are both fixed on the copper row upper support.

5. The high power four-quadrant water-cooled frequency inverter unit of claim 2, wherein: The external bypass row (3) and the rectifier input row (9) are both in a detachable form, after the external bypass row and the rectifier input row are detached, the main control plate assembly (12) can be detached and installed.

6. A high power four-quadrant water-cooled inverter unit according to claim 1 or 2, characterized in that: The periphery of the water-cooled plate assembly (16) is provided with an upper protective cover (5) for protection, and the periphery of the main control plate assembly (12) is provided with a main control plate cover (6).

7. A high power four-quadrant water-cooled inverter unit according to claim 1 or 2, characterized in that: The laminated busbar (8) is provided with a shunt groove (41) for guiding current.

8. A high power four-quadrant water-cooled inverter unit according to claim 1 or 2, characterized in that: The switching power supply assembly (13) is composed of a switching power supply (38), a power supply installation plate (36) and a power supply support (37), the switching power supply is fixed on the power supply installation plate, the power supply support is fixed on the four corners of the power supply installation plate, and the power supply support is installed on the shell (4); an opening is formed on the side surface of the shell at a position corresponding to the switching power supply.

9. A high power four-quadrant water-cooled inverter unit according to claim 1 or 2, characterized in that: The water-cooled plate (23) is provided with a quick plug water-cooled joint (14) for circulating cooling water, and the lower surface of the water-cooled plate is provided with a thick film resistor (26).

10. The high power four-quadrant water-cooled frequency inverter unit of claim 1 or 2, characterized by: The two ends of the front side of the shell (4) are both fixed with a handle (15).

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