Stacked confluence busbar for multi-phase inverter

Abstract

The invention relates to a stacked bus bar for a multi-phase inverter, and relates to the field of multi-phase motor inverter technical equipment, the stacked bus bar comprises a plurality of power tubes arranged side by side, each power tube is provided with a driving plate, one side of the driving plate away from the power tubes is provided with a stacked bus bar, and the stacked bus bar is provided with a plurality of bus bars. The stacked busbar is connected with the power tube through a power tube fixing assembly, one side of the stacked busbar is also provided with a capacitor, and the capacitor is connected with the stacked busbar through a capacitor fixing assembly. According to the invention, through the high-integration design, scattered parts of the stacked busbar are packaged, the installation portability and the error-tolerant rate are improved, and the occupied area of the inverter is reduced.

Description

Technical Field

[0001] The present application relates to the field of multi-phase motor inverter technical equipment, and in particular to a stacked busbar for a multi-phase inverter. Background Art

[0002] The motor inverter is mainly used to receive the PWM drive signal of the motor controller, realize the high-frequency opening and closing of the power device through the drive circuit, and thus convert the input DC power into the three-phase AC power required to drive the motor to rotate. The motor inverter is usually composed of power devices, drive circuit boards, DC filter capacitors, buses, etc. The DC filter capacitor is installed on the bus and connected to the positive and negative poles of the power tube through the bus to smooth the DC voltage, filter high-frequency noise, and provide energy buffering.

[0003] Multiphase motors are widely used in scenarios with high power and low vibration and noise requirements due to their high power density, low torque pulsation, low vibration and noise, and high reliability. Each phase output of a multiphase inverter needs to be equipped with an independent power tube and drive circuit. Its structural complexity is higher than that of a three-phase motor inverter, and it occupies a larger space volume and weight. The integration level of the bus and capacitor directly determines the integration level of multiple motor inverters.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the existing stacked bus and power tube installation adopts a flat structure, and the stacked bus has a low integration level. The insulating pads, mounting support columns, etc. are all scattered parts, occupying a large area, which is not conducive to the miniaturization and high-integration design of multi-phase inverters. Summary of the invention

[0005] In order to package the scattered parts of the stacked busbar through a highly integrated design, improve the installation portability and fault tolerance, and reduce the area occupied by the inverter, the present application provides a stacked busbar for a multi-phase inverter.

[0006] The present application provides a stacked busbar for a multi-phase inverter, which adopts the following technical solution:

[0007] A stacked busbar for a multi-phase inverter includes a plurality of power tubes arranged side by side, a drive board is arranged on the power tube, a stacked busbar is arranged on the side of the drive board away from the power tube, the stacked busbar is connected to the power tube via a power tube fixing assembly, a capacitor is further arranged on one side of the stacked busbar, and the capacitor is connected to the stacked busbar via a capacitor fixing assembly.

[0008] Optionally, the stacked bus includes a positive bus and a negative bus that are relatively arranged, the power tube fixing assembly is provided with a power tube positive fixing assembly relative to the positive bus, the power tube fixing assembly is provided with a power tube negative fixing assembly relative to the negative bus, the capacitor fixing assembly is provided with a capacitor positive fixing component relative to the positive bus, and the capacitor fixing assembly is provided with a capacitor negative fixing component relative to the negative bus.

[0009] Optionally, the power tube positive electrode fixing assembly includes a power tube positive electrode fixing column, the power tube positive electrode fixing column penetrates the positive electrode bus and the negative electrode bus, the power tube positive electrode fixing column is provided with a first insulating gasket relative to the negative electrode bus sleeve, and the inside of the power tube positive electrode fixing column is fixedly connected with a first fixing bolt.

[0010] Optionally, the power tube negative electrode fixing assembly includes a power tube negative electrode fixing column, the power tube negative electrode fixing column penetrates the positive electrode bus and the negative electrode bus, the power tube negative electrode fixing column is provided with a second insulating gasket relative to the positive electrode bus sleeve, and the inside of the power tube negative electrode fixing column is fixedly connected with a second fixing bolt.

[0011] Optionally, the power tube negative electrode fixing column is located at the position of the positive electrode bus and is sleeved with a power tube negative electrode copper sleeve, and the power tube negative electrode copper sleeve is located on the inner side of the second insulating gasket.

[0012] Optionally, the capacitor positive electrode fixing assembly includes a capacitor positive electrode fixing column, which passes through the positive electrode bus and the negative electrode bus, and the capacitor positive electrode fixing column is provided with a first capacitor insulating gasket relative to the negative electrode bus. The capacitor positive electrode fixing column is provided with a first nut, and the first nut is fixed to the capacitor thread.

[0013] Optionally, the capacitor negative electrode fixing assembly includes a capacitor negative electrode fixing column, which passes through the positive electrode bus and the negative electrode bus, and the capacitor negative electrode fixing column is provided with a second capacitor insulating gasket relative to the positive electrode bus sleeve, and a second nut is provided on the capacitor negative electrode fixing column, and the second nut is fixed to the capacitor thread.

[0014] Optionally, the capacitor positive electrode fixing column is located at the position of the negative electrode bus and is sleeved with a capacitor positive electrode copper sleeve, and the capacitor positive electrode copper sleeve is located on the inner side of the first capacitor insulating gasket.

[0015] Optionally, a first spring washer is provided on a side of the first nut close to the stacked bus, a first flat washer is provided on a side of the first spring washer close to the stacked bus, and the first flat washer abuts against the stacked bus; a second spring washer is provided on a side of the second nut close to the stacked bus, a second flat washer is provided on a side of the second spring washer close to the stacked bus, and the second flat washer abuts against the stacked bus.

[0016] Optionally, the stacked busbar, the power tube fixing assembly and the capacitor fixing assembly are laminated and packaged with an insulating film.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. The components of the stacked busbar are packaged as a whole, with high integration, to avoid wrong installation and missing installation of the busbar;

[0019] 2. The stacked busbar and power tube are installed vertically up and down, which does not occupy the plane space and reduces the area occupied by the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a stacked busbar for a multi-phase inverter in an embodiment of the present application.

[0021] Figure 2 It is a structural schematic diagram of the power tube position of a stacked busbar for a multi-phase inverter in an embodiment of the present application.

[0022] Figure 3 It is a structural schematic diagram of the capacitor position of a stacked busbar for a multi-phase inverter in an embodiment of the present application.

[0023] Description of the accompanying drawings: 1. power tube; 2. drive board; 3. stacked bus; 31. positive bus; 32. negative bus; 4. capacitor; 41. positive connection terminal; 42. negative connection terminal; 5. power tube fixing assembly; 51. power tube positive fixing assembly; 511. first fixing bolt; 512. power tube positive spring pad; 513. power tube positive flat pad; 514. power tube positive fixing column; 515. first insulating gasket; 52. power tube negative fixing assembly; 521. second fixing bolt; 522. power tube Negative spring washer; 523, negative flat washer of power tube; 524, negative fixing column of power tube; 525, second insulating gasket; 526, negative copper sleeve of power tube; 6, capacitor fixing assembly; 61, first nut; 611, first spring washer; 612, first flat washer; 613, positive fixing column of capacitor; 614, first insulating gasket of capacitor; 615, positive copper sleeve of capacitor; 62, second nut; 621, second spring washer; 622, second flat washer; 623, negative fixing column of capacitor; 624, second insulating gasket of capacitor; 7, insulating film. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0026] The following is combined with Figure 1-3 This application is described in further detail.

[0027] The present application discloses a stacked busbar for a multi-phase inverter. Figure 1 , Figure 2 A stacked busbar for a multi-phase inverter includes a plurality of power tubes 1 arranged side by side, a driving board 2 is arranged on the power tubes 1, and the driving board 2 is arranged parallel to the power tubes 1. A stacked busbar 3 is arranged on the side of the driving board 2 away from the power tubes 1, and the stacked busbar 3 is arranged parallel to the driving board 2.

[0028] Reference Figure 2 , Figure 3A plurality of capacitors 4 are also arranged on the side of the stacked busbar 3 away from the driving board 2, and the positive connection end 41 and the negative connection end 42 of the capacitor 4 respectively penetrate the stacked busbar 3. The stacked busbar 3 and the power tube 1 are relatively connected and fixed by the power tube fixing component 5, and the capacitor 4 and the stacked busbar 3 are relatively connected and fixed by the capacitor fixing component 6.

[0029] The stacked busbars 3 include a positive busbar 31 and a negative busbar 32 arranged relatively parallel to each other, and the positive busbar 31 and the negative busbar 32 are relatively abutted against each other. The positive busbar 31 is located on the side of the negative busbar 32 away from the driving board 2.

[0030] The power tube fixing assembly 5 includes a power tube positive fixing assembly 51 opposite to the positive bus 31. The positive fixing component of the power tube 1 fixes the power tube 1 and the positive bus 31 relatively and realizes the function of the bus conductive input. A power tube negative fixing assembly 52 is also provided at the negative bus 32. The power tube negative fixing assembly 52 fixes the power tube 1 and the negative bus 32 relatively and realizes the function of the bus conductive input.

[0031] The power tube positive electrode fixing assembly 51 includes a first fixing bolt 511, which completely penetrates the positive electrode bus 31 and the negative electrode bus 32. A power tube positive electrode spring pad 512 is arranged between the first fixing bolt 511 and the positive electrode bus 31. A power tube positive electrode flat pad 513 is also arranged on the side of the power tube positive electrode spring pad 512 close to the positive electrode bus 31. The power tube positive electrode flat pad 513 is relatively abutted against the positive electrode bus 31.

[0032] A power tube positive electrode fixing column 514 is sleeved on the outer side of the first fixing bolt 511. The power tube positive electrode fixing column 514 is vertically arranged with the stacked bus 3, and the power tube positive electrode fixing column 514 is relatively connected to the side wall of the positive bus 31. The diameter of the power tube positive electrode fixing column 514 at the relative position with the positive bus 31 is smaller than the diameter of the power tube positive electrode fixing column 514 at the relative position with the negative bus 32. A first insulating gasket 515 is sleeved on the outer side of the side wall opposite to the negative bus 32 of the power tube positive electrode fixing column 514. The first insulating gasket 515 meets the positive and negative creepage distance of not less than 6 mm.

[0033] The power tube negative electrode fixing assembly 52 includes a second fixing bolt 521, which completely penetrates the positive bus 31 and the negative bus 32. A power tube negative electrode spring pad 522 is arranged between the second fixing bolt 521 and the positive bus 31. A power tube negative electrode flat pad 523 is also arranged on the side of the power tube negative electrode spring pad 522 close to the positive bus 31. The power tube negative electrode flat pad 523 is relatively abutted against the positive bus 31.

[0034] A power tube negative electrode fixing column 524 is sleeved on the outer side of the second fixing bolt 521. The power tube negative electrode fixing column 524 is vertically arranged with the stacked bus 3, and the power tube negative electrode fixing column 524 is relatively connected to the side wall of the negative bus 32. The diameter of the power tube negative electrode fixing column 524 at the relative position to the positive bus 31 is smaller than the diameter of the power tube negative electrode fixing column 524 at the position on the side of the negative bus 32 away from the positive bus 31. A second insulating gasket 525 is sleeved on the outer side of the side wall of the power tube negative electrode fixing column 524 opposite to the positive bus 31. The second insulating gasket 525 meets the positive and negative creepage distance of not less than 6 mm.

[0035] A power tube negative electrode copper sleeve 526 is coaxially sleeved on the outer side of the power tube negative electrode fixing column 524 relative to the positive electrode bus 31. The power tube negative electrode copper sleeve 526 is located on the inner side of the first insulating gasket 515, and the inner side wall of the power tube negative electrode copper sleeve 526 abuts against the side wall of the power tube negative electrode fixing column 524, and the outer side wall of the power tube negative electrode copper sleeve 526 is spaced apart from the first insulating gasket 515.

[0036] The capacitor fixing assembly 6 includes a first nut 61, which is relatively connected to the outer side of the positive electrode connection end 41 of the capacitor 4, and a first spring washer 611 is provided on the side of the first nut 61 close to the stacked bus 3, and the first spring washer 611 is sleeved on the outer side of the positive electrode connection end 41 of the capacitor 4. A first flat washer 612 is also provided on the side of the first spring washer 611 close to the stacked bus 3, and the first flat washer 612 is sleeved on the outer side of the positive electrode connection end 41 of the capacitor 4, and the first flat washer 612 abuts against the stacked bus 3.

[0037] A capacitor positive electrode fixing column 613 is arranged outside the positive electrode connection end 41 of the capacitor 4, and the capacitor positive electrode fixing column 613 penetrates the stacked bus 3, and the capacitor positive electrode fixing column 613 is coaxially arranged with the positive electrode connection end 41 of the capacitor 4. The capacitor positive electrode fixing column 613 is relatively in contact with the side wall of the positive bus 31, and a first capacitor insulating gasket 614 is arranged at the position of the capacitor positive electrode fixing column 613 and the negative bus 32, the first capacitor insulating gasket 614 is coaxially arranged with the capacitor positive electrode fixing column 613, the outer side wall of the first capacitor insulating gasket 614 is relatively in contact with the negative bus 32, and the first capacitor insulating gasket 614 meets the positive and negative creepage distance of not less than 6mm.

[0038] A capacitor positive copper sleeve 615 is coaxially sleeved on the outer side of the capacitor positive electrode fixing column 613 relative to the negative electrode bus 32. The capacitor positive electrode copper sleeve 615 is located on the inner side of the first capacitor insulating gasket 614, and the inner side wall of the capacitor positive electrode copper sleeve 615 is in contact with the side wall of the capacitor positive electrode fixing column 613, and the outer side wall of the capacitor positive electrode copper sleeve 615 is spaced apart from the first capacitor insulating gasket 614.

[0039] The capacitor fixing assembly 6 also includes a second nut 62, which is relatively connected to the outer side of the negative electrode connection terminal 42 of the capacitor 4, and a second spring washer 621 is provided on the side of the second nut 62 close to the stacked bus 3, and the second spring washer 621 is sleeved on the outer side of the negative electrode connection terminal 42 of the capacitor 4. A second flat washer 622 is also provided on the side of the second spring washer 621 close to the stacked bus 3, and the second flat washer 622 is sleeved on the outer side of the negative electrode connection terminal 42 of the capacitor 4, and the second flat washer 622 abuts against the stacked bus 3.

[0040] A capacitor negative electrode fixing column 623 is arranged outside the negative electrode connection end 42 of the capacitor 4, and the capacitor negative electrode fixing column 623 penetrates the stacked bus 3, and the capacitor negative electrode fixing column 623 is coaxially arranged with the negative electrode connection end 42 of the capacitor 4. The capacitor negative electrode fixing column 623 is relatively in contact with the side wall of the negative bus 32, and a second capacitor insulating gasket 624 is arranged at the position of the capacitor negative electrode fixing column 623 and the positive bus 31, and the second capacitor insulating gasket 624 is coaxially arranged with the capacitor negative electrode fixing column 623, and the outer side wall of the second capacitor insulating gasket 624 is relatively in contact with the positive bus 31, and the second capacitor insulating gasket 624 meets the positive and negative electrode creepage distance of not less than 6mm.

[0041] An insulating film 7 is provided on the stacked bus 3, and the insulating film 7 compresses and packages the positive bus 31, the negative bus 32, the power tube negative copper sleeve 526, the power tube negative fixing column 524, the power tube positive fixing column 514, the first insulating gasket 515, the capacitor negative fixing column 623, the capacitor positive copper sleeve 615, the first capacitor insulating gasket 614, and the capacitor positive fixing column 613.

[0042] In some embodiments, the stacked busbar 3 is installed above the six power tubes 1, realizing the vertical layout of the inverter and reducing the area occupied by the inverter. The drive board 2 is connected to the power tube 1, and the stacked busbar 3 is connected to the power tube 1 through the first busbar fixing bolt 511 and the second busbar fixing bolt 521.

[0043] The stacked bus 3 and the power tube 1 are fastened using bus fixing screws. The positive electrode of the power tube 1 is connected to the positive bus 31 through the power tube positive fixing column 514, and the negative electrode of the power tube 1 is connected to the negative bus 32 through the power tube negative fixing column 524, so as to realize the positive and negative electrical input of the power tube 1, wherein the power tube negative fixing column 524 and the negative bus 32 are riveted and pressed through the power tube negative copper sleeve 526.

[0044] The stacked busbar 3 is insulated between the power tube positive fixing column 514, the power tube negative fixing column 524 and the positive busbar 31, the negative busbar 32 through the first insulating gasket 515, which can meet the positive and negative creepage distance of not less than 6mm.

[0045] The stacked bus 3 and capacitor 4 are installed and fastened using hexagonal nuts, spring washers, and flat washers. The positive electrode of capacitor 4 is connected to the positive bus 31 through the capacitor positive electrode fixing column 613, and the negative electrode of capacitor 4 is connected to the negative bus 32 through the capacitor negative electrode fixing column 623, thereby realizing the positive and negative electrical input of capacitor 4, wherein the capacitor positive electrode fixing column 613 and the positive bus 31 are riveted and pressed through the capacitor positive electrode copper sleeve 615.

[0046] The stacked busbar 3 is insulated between the capacitor positive fixing column 613, the capacitor negative fixing column 623 and the positive busbar 31, the negative busbar 32 through the first capacitor insulating gasket 614, which can meet the positive and negative creepage distance of not less than 6mm.

[0047] The stacked bus 3 is connected to the positive and negative electrodes of the power tube 1 through the power tube positive fixing column 514 and the power tube negative fixing column 524, realizing the positive and negative input of the power tube 1, and also providing support for the fixed installation of the stacked bus 3, realizing the dual functions of conductive input and structural support and fixation of the stacked bus 3.

[0048] In this application, the term "plurality" means at least two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0049] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A stacked busbar for a multi-phase inverter, characterized in that: The invention comprises a plurality of power tubes (1) arranged in parallel, wherein a driving board (2) is arranged on the power tube (1), a stacked bus (3) is arranged on the side of the driving board (2) facing away from the power tube (1), the stacked bus (3) is connected to the power tube (1) via a power tube fixing component (5), a capacitor (4) is also arranged on one side of the stacked bus (3), and the capacitor (4) is connected to the stacked bus (3) via a capacitor fixing component (6).

2. The stacked busbar for a multi-phase inverter according to claim 1, characterized in that: The stacked busbar (3) comprises a positive busbar (31) and a negative busbar (32) arranged relatively to each other; the power tube fixing assembly (5) is provided with a power tube positive electrode fixing assembly (51) relative to the positive busbar (31); the power tube fixing assembly (5) is provided with a power tube negative electrode fixing assembly (52) relative to the negative busbar (32); the capacitor fixing assembly (6) is provided with a capacitor positive electrode fixing component relative to the positive busbar (31); and the capacitor fixing assembly (6) is provided with a capacitor negative electrode fixing component relative to the negative busbar (32).

3. The stacked busbar for a multi-phase inverter according to claim 2, characterized in that: The power tube positive electrode fixing assembly (51) comprises a power tube positive electrode fixing column (514), the power tube positive electrode fixing column (514) penetrates the positive electrode bus (31) and the negative electrode bus (32), the power tube positive electrode fixing column (514) is sleeved with a first insulating gasket (515) relative to the negative electrode bus (32), and the inside of the power tube positive electrode fixing column (514) is fixedly connected with a first fixing bolt (511).

4. The stacked busbar for a multi-phase inverter according to claim 2, characterized in that: The power tube negative electrode fixing assembly (52) comprises a power tube negative electrode fixing column (524), the power tube negative electrode fixing column (524) penetrates the positive electrode bus (31) and the negative electrode bus (32), the power tube negative electrode fixing column (524) is sleeved with a second insulating gasket (525) relative to the positive electrode bus (31), and the inside of the power tube negative electrode fixing column (524) is fixedly connected with a second fixing bolt (521).

5. The stacked busbar for a multi-phase inverter according to claim 4, characterized in that: The power tube negative electrode fixing column (524) is located at the position of the positive electrode bus bar (31) and is sleeved with a power tube negative electrode copper sleeve (526), ​​and the power tube negative electrode copper sleeve (526) is located on the inner side of the second insulating gasket (525).

6. The stacked busbar for a multi-phase inverter according to claim 2, characterized in that: The capacitor positive electrode fixing assembly comprises a capacitor positive electrode fixing column (613), the capacitor positive electrode fixing column (613) penetrates the positive electrode bus (31) and the negative electrode bus (32), the capacitor positive electrode fixing column (613) is sleeved with a first capacitor insulating gasket (614) relative to the negative electrode bus (32), and the capacitor positive electrode fixing column (613) is provided with a first nut (61), and the first nut (61) is threadedly fixed to the capacitor (4).

7. The stacked busbar for a multi-phase inverter according to claim 6, characterized in that: The capacitor negative electrode fixing assembly comprises a capacitor negative electrode fixing column (623), the capacitor negative electrode fixing column (623) penetrates the positive electrode bus (31) and the negative electrode bus (32), the capacitor negative electrode fixing column (623) is sleeved with a second capacitor insulating gasket (624) relative to the positive electrode bus (31), and the capacitor negative electrode fixing column (623) is provided with a second nut (62), and the second nut (62) is threadedly fixed to the capacitor (4).

8. The stacked busbar for a multi-phase inverter according to claim 6, characterized in that: The capacitor positive electrode fixing column (613) is located at the position of the negative electrode bus bar (32) and is sleeved with a capacitor positive electrode copper sleeve (615), and the capacitor positive electrode copper sleeve (615) is located on the inner side of the first capacitor insulating gasket (614).

9. The stacked busbar for a multi-phase inverter according to claim 7, characterized in that: A first spring washer (611) is provided on a side of the first nut (61) close to the stacked bus (3), a first flat washer (612) is provided on a side of the first spring washer (611) close to the stacked bus (3), and the first flat washer (612) abuts against the stacked bus (3); a second spring washer (621) is provided on a side of the second nut (62) close to the stacked bus (3), a second flat washer (622) is provided on a side of the second spring washer (621) close to the stacked bus (3), and the second flat washer (622) abuts against the stacked bus (3).

10. The stacked busbar for a multi-phase inverter according to any one of claims 1 to 9, characterized in that: The stacked busbar (3), the power tube fixing assembly (5) and the capacitor fixing assembly (6) are laminated and packaged with an insulating film (7).

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