A split dual three-phase rectifier bridge structure

Abstract

The present invention belongs to the field of motor design technology, and is specifically a split dual three-phase rectifier bridge structure. It includes a positive rectifier bridge component (1), a negative rectifier bridge component (2), and a busbar (3); the busbar (3) connects the six-phase bridge arms A1, B1, C1, A2, B2, and C2 of the positive rectifier bridge component (1) and the negative rectifier bridge component (2) respectively to form a dual three-phase rectifier bridge. The present invention discloses a structure for rectifying a 270V high-voltage direct current power supply, which is a dual three-phase rectifier bridge. Due to space requirements, the rectifier bridge structure of this form is compact, and the positive and negative poles of the dual three-phase rectifier bridge are designed as two separate components, which can omit the design of partial insulation between diodes, and the overall volume is smaller than that of products with the same function, and can stably output 270V direct current, which is safe and reliable to use.

Description

Technical Field

[0001] The invention belongs to the field of motor design technology, and specifically is a split dual three-phase rectifier bridge structure. Background Art

[0002] With the continuous advancement of aviation technology, the demand for 270V high-voltage DC power supplies is also increasing, and more stringent requirements are placed on the motor's external dimensions. There are technical difficulties in achieving rectification of the motor in a small space. Summary of the invention

[0003] The purpose of the invention is: this paper designs a split dual three-phase rectifier bridge structure, which is exquisite, stable, safe and reliable, and can effectively convert the alternating current output by the generator into 270V direct current to solve the technical difficulties of existing small space rectification.

[0004] The technical solution of the present invention is: a split dual three-phase rectifier bridge structure, including a positive rectifier bridge assembly 1, a negative rectifier bridge assembly 2, and a bus 3; the bus 3 connects the six-phase bridge arms A1, B1, C1, A2, B2, and C2 of the positive rectifier bridge assembly 1 and the negative rectifier bridge assembly 2 respectively to form a dual three-phase rectifier bridge.

[0005] The positive rectifier bridge assembly 1 includes 6 positive rectifier subassemblies 4 and 1 bottom plate assembly 5; the positive rectifier subassembly 4 includes a flat diode 6, a T-shaped terminal 7, a T-shaped insulator 8, and a positive pressure plate 9; the positive electrode of the flat diode 6 is embedded in the circular groove of the T-shaped terminal 7, the boss of the T-shaped terminal 7 is matched with the inner hole of the T-shaped insulator 8, and the boss of the T-shaped insulator 8 is matched with the inner hole of the positive pressure plate 9; the negative rectifier bridge assembly 2 includes 6 negative rectifier subassemblies 10, a bottom plate component 5; the negative rectifier subassembly 10 includes a flat diode 6, a T-shaped terminal 7, a T-shaped insulator 8, a negative pressure plate 12, and an L-shaped terminal piece 13; the negative electrode of the flat diode 6 is embedded in the circular groove of the L-shaped terminal piece 13, the boss of the L-shaped terminal piece 13 is embedded in the circular groove of the T-shaped terminal 7, the boss of the T-shaped terminal 7 is matched with the inner hole of the T-shaped insulator 8, and the boss of the T-shaped insulator 8 is matched with the inner hole of the negative pressure plate 12.

[0006] The bottom plate assembly 5 includes a bottom plate 11 and a conductive copper plate 14 . The bottom plate 11 has a groove on the surface where it is pressed against the flat diode 6 , and the conductive copper plate 14 is embedded therein.

[0007] A flow channel is added to the bottom surface of the bottom plate 11 to guide the cooling liquid to flow directly below the circular surface of the flat-plate diode 6 .

[0008] The material of the bottom plate 11 is aluminum alloy.

[0009] A locking wire screw sleeve is embedded in the bottom plate screw installation hole of the bottom plate 11.

[0010] The T-shaped terminal 7 is made of tungsten copper, and a groove is added on the matching surface with the flat diode 4.

[0011] The T-shaped insulation 8 is made of polyimide material with high pressure resistance.

[0012] The positive electrode rectifying subassembly 4 and the negative electrode rectifying subassembly 10 are assembled in a press-fitting manner, so circular grooves are respectively provided at the center positions of the positive electrode pressing plate 9 and the negative electrode pressing plate 12 .

[0013] The busbar 3 is made of copper, and except for the screw crimping area, the rest of the busbar 3 is sprayed with insulating paint.

[0014] Beneficial effects of the invention: The invention discloses a structure for rectifying a 270V high-voltage DC power supply, which is a double three-phase rectifier bridge. Limited by the space requirement, this type of rectifier bridge has a compact structure, and the positive and negative poles of the double three-phase rectifier bridge are designed as two separate components, which can omit the design of partial insulation between diodes. The overall volume is smaller than that of products with the same function, and it can stably output 270V DC power, which is safe and reliable to use. The arrangement of the rectifier bridge in a smaller space is realized, which is easy to assemble, has high efficiency, and good heat dissipation, and can achieve 270V DC output, which is in line with the future development direction of aviation motors, has good prospects, and a broad market. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the split dual three-phase rectifier bridge structure of the present invention.

[0016] Figure 2 It is a top view and a side view of the bottom plate assembly 5 of the present invention.

[0017] Figure 3 1 and 2 are a top view and a side view of the positive electrode rectifying subassembly 4 of the present invention.

[0018] Figure 4 It is a three-view diagram of the negative electrode rectifying subassembly 10 of the present invention.

[0019] Among them: 1-positive rectifier bridge assembly, 2-negative rectifier bridge assembly, 3-bus, 4-positive rectifier subassembly, 5-bottom plate assembly, 6-flat diode, 7-T-shaped terminal, 8-T-shaped insulation, 9-positive pressure plate, 10-negative rectifier subassembly, 11-bottom plate, 12-negative pressure plate, 13-L-shaped terminal, 14-conductive copper plate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings:

[0021] like Figure 1As shown, a split dual three-phase rectifier bridge structure includes a positive rectifier bridge assembly 1, a negative rectifier bridge assembly 2, and a bus 3; the bus 3 connects the six-phase bridge arms A1, B1, C1, A2, B2, and C2 of the positive rectifier bridge assembly 1 and the negative rectifier bridge assembly 2 respectively to form a dual three-phase rectifier bridge.

[0022] like Figure 3 , 4 As shown, the positive rectifier bridge assembly 1 includes 6 positive rectifier subassemblies 4 and 1 bottom plate assembly 5; the positive rectifier subassembly 4 includes a flat diode 6, a T-shaped terminal 7, a T-shaped insulator 8, and a positive pressure plate 9; the positive electrode of the flat diode 6 is embedded in the circular groove of the T-shaped terminal 7, the boss of the T-shaped terminal 7 is matched with the inner hole of the T-shaped insulator 8, and the boss of the T-shaped insulator 8 is matched with the inner hole of the positive pressure plate 9; the negative rectifier bridge assembly 2 includes 6 negative rectifier subassemblies Component 10, a bottom plate component 5; the negative rectifier subassembly 10 includes a flat-plate diode 6, a T-shaped terminal 7, a T-shaped insulator 8, a negative pressure plate 12, and an L-shaped terminal piece 13; the negative electrode of the flat-plate diode 6 is embedded in the circular groove of the L-shaped terminal piece 13, the boss of the L-shaped terminal piece 13 is embedded in the circular groove of the T-shaped terminal 7, the boss of the T-shaped terminal 7 cooperates with the inner hole of the T-shaped insulator 8, and the boss of the T-shaped insulator 8 cooperates with the inner hole of the negative pressure plate 12.

[0023] like Figure 2 As shown, the bottom plate assembly 5 includes a bottom plate 11 and a conductive copper plate 14; in order to achieve the advantages of light weight and good conductivity of the bottom plate assembly 5, the material of the bottom plate 11 is selected from aluminum alloy, and a groove is opened on the crimping surface with the flat-plate diode 6 to embed the conductive copper plate 14. Considering the vibration resistance, anti-loosening and space limitation of the screw installation, the bottom plate 11 is embedded with a locking wire screw sleeve inside the bottom plate screw installation hole. Considering that the flat-plate diode 6 relies on the upper and lower circular surfaces to dissipate heat, a flow channel is added to the bottom surface of the bottom plate 11 (the non-conductive copper plate 14 embedding surface) to guide the coolant to flow directly below the circular surface of the flat-plate diode 6.

[0024] The T-shaped terminal 7 withstands a pressure of about 5kN to 10kN during assembly. Tungsten copper with good pressure resistance and conductivity is selected, and a groove is added on the matching surface with the flat diode 4 to increase the guiding and centering function.

[0025] Considering the overall insulation, a T-shaped insulator 8 is added between the pressure plate and the T-shaped terminal 7. Since the installation pressure of the flat diode 6 is between 5kN and 10kN, the T-shaped insulator 8 is made of a high-pressure-resistant PI (polyimide) material.

[0026] like Figure 3As shown, the positive rectifying subassembly 4 and the negative rectifying subassembly 10 are assembled in a press-fit form, so circular grooves are respectively provided at the center positions of the positive pressing plate 9 and the negative pressing plate 12 to prevent large eccentricity of the parts during press-fitting; considering that the flat-plate diode 6 relies on the upper and lower circular surfaces to dissipate heat, a rectangular boss is added on the other side of the two pressing plates to expand the heat dissipation area.

[0027] Considering the height space limitation, a copper busbar 3 is used between the diodes of each phase. To ensure the insulation, the busbar 3 is sprayed with insulating paint except the screw crimping area.

[0028] The cooling method of the split dual three-phase rectifier bridge structure of this structural form is suitable for aviation lubricating oil cooling.

Claims

1. A split dual three-phase rectifier bridge structure, characterized in that: It comprises a positive rectifier bridge assembly (1), a negative rectifier bridge assembly (2), and a busbar (3); the busbar (3) respectively connects the six-phase bridge arms A1, B1, C1, A2, B2, and C2 of the positive rectifier bridge assembly (1) and the negative rectifier bridge assembly (2) to form a double three-phase rectifier bridge.

2. According to claim 1, the split dual three-phase rectifier bridge structure is characterized in that: The positive rectifier bridge assembly (1) includes six positive rectifier subassemblies (4) and one bottom plate assembly (5); the positive rectifier subassembly (4) includes a flat-plate diode (6), a T-shaped terminal (7), a T-shaped insulator (8), and a positive pressure plate (9); the positive electrode of the flat-plate diode (6) is embedded in the circular groove of the T-shaped terminal (7), the boss of the T-shaped terminal (7) matches with the inner hole of the T-shaped insulator (8), and the boss of the T-shaped insulator (8) matches with the inner hole of the positive pressure plate (9); the negative rectifier bridge assembly (2) includes six negative rectifier subassemblies ( 10), a bottom plate assembly (5); the negative electrode rectifier subassembly (10) comprises a flat-plate diode (6), a T-shaped terminal (7), a T-shaped insulator (8), a negative electrode pressure plate (12), and an L-shaped terminal piece (13); the negative electrode of the flat-plate diode (6) is embedded in the circular groove of the L-shaped terminal piece (13), the boss of the L-shaped terminal piece (13) is embedded in the circular groove of the T-shaped terminal (7), the boss of the T-shaped terminal (7) is matched with the inner hole of the T-shaped insulator (8), and the boss of the T-shaped insulator (8) is matched with the inner hole of the negative electrode pressure plate (12).

3. According to claim 2, the split dual three-phase rectifier bridge structure is characterized in that: The bottom plate assembly (5) comprises a bottom plate (11) and a conductive copper plate (14); the bottom plate (11) has a groove on the surface for crimping with the flat-plate diode (6) and the conductive copper plate (14) is embedded therein.

4. According to claim 3, the split dual three-phase rectifier bridge structure is characterized in that: A flow channel is added to the bottom surface of the bottom plate (11) to guide the cooling liquid to flow directly below the circular surface of the flat-plate diode (6).

5. According to claim 3, the split dual three-phase rectifier bridge structure is characterized in that: The material of the bottom plate (11) is selected from aluminum alloy.

6. According to claim 3, the split dual three-phase rectifier bridge structure is characterized in that: A locking wire screw sleeve is embedded in the bottom plate screw installation hole of the bottom plate (11).

7. According to claim 2, the split dual three-phase rectifier bridge structure is characterized in that: The T-shaped terminal (7) is made of tungsten copper, and a groove is added on the matching surface with the flat diode (4).

8. According to claim 2, the split dual three-phase rectifier bridge structure is characterized in that: The T-type insulation (8) is made of polyimide material with high pressure resistance.

9. According to claim 2, the split dual three-phase rectifier bridge structure is characterized in that: The positive electrode rectifying subassembly (4) and the negative electrode rectifying subassembly (10) are assembled in a press-fitting manner, so circular grooves are respectively arranged at the center positions of the positive electrode pressing plate (9) and the negative electrode pressing plate (12).

10. The split dual three-phase rectifier bridge structure according to claim 1 is characterized in that: The busbar (3) is made of copper, and except for the screw crimping area, the rest of the busbar (3) is sprayed with insulating paint.

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