Bidirectional side-by-side three-phase connecting assembly capable of applying double motors

Abstract

The utility model relates to a bidirectional side-by-side three-phase connecting assembly capable of applying double motors. Comprising a PCB and an injection molding copper bar connecting device, and the injection molding copper bar connecting device comprises a copper bar injection molding part and a three-phase connecting module; the three-phase connection module comprises a three-phase connection TM module and a three-phase connection GM module, and the whole three-phase connection module is of a side-by-side structure. The three-phase connection TM module comprises a three-phase output terminal TM and a three-phase conversion terminal TM; the three-phase connection GM module comprises a three-phase output terminal GM and a three-phase conversion terminal GM; the three-phase output terminals and the three-phase conversion terminals are arranged in a Z shape and are distributed on two surfaces of a diagonal line; a U-shaped magnetic ring is integrated on the side, connected with the PCB, of the injection molding copper bar, and the U-shaped magnetic ring is integrated with the copper bar through injection molding to form a u-shield structure. Compared with the prior art, the utility model has the advantages of outputting double currents in the same direction, being compact, high in integration level and good in stability.

Description

Technical Field

[0001] This utility model relates to the field of controller technology, and in particular to a three-phase connection component that can be used with two motors in a bidirectional parallel configuration. Background Technology

[0002] In current dual-motor structures, the generator and drive motors are located on the same side. The inverter brick has a dual-module structure, mainly consisting of two independently placed power modules, one above the other. The current flows through the two power modules in the same direction, forming a combined output.

[0003] With this dual-module structure, the high-voltage connection components are close to the two power modules, and the available space is very limited. This increases the difficulty of the copper busbar routing. The copper busbar arrangement is a technical challenge. It needs to be arranged reasonably in a limited space to ensure effective current transmission, while also taking into account the copper busbar's heat conduction, heat dissipation, and structural stability.

[0004] At the same time, in order to meet the design requirements of the current sensor, the designer also needs to consider the magnetic field crosstalk problem of the chip. Different copper busbar arrangements will cause different magnetic field crosstalk to the chip, which further increases the design difficulty.

[0005] In summary, within a limited structural space, there is an urgent need for a compact and highly integrated copper busbar connection component structure that can meet the requirements of unidirectional dual current output while avoiding crosstalk with the chip's magnetic field. Utility Model Content

[0006] The purpose of this utility model is to overcome the defects of the existing technology.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A three-phase connection assembly for bidirectional parallel application of dual motors includes a PCB board 2 and an injection-molded copper busbar connection device 1, wherein the PCB board 2 and the injection-molded copper busbar connection device 1 are connected by screws 3.

[0009] The injection-molded copper busbar connection device 1 includes a copper busbar injection molded part and a three-phase connection module; the three-phase connection module includes a three-phase connection TM module and a three-phase connection GM module, which are arranged in a side-by-side structure.

[0010] The three-phase connection TM module includes a three-phase output terminal TM14 and a three-phase adapter terminal TM13; the three-phase connection GM module includes a three-phase output terminal GM15 and a three-phase adapter terminal GM12; each three-phase output terminal and three-phase adapter terminal is arranged in a Z-shape and distributed diagonally vertically.

[0011] Preferably, the injection-molded copper busbar also integrates a U-shaped magnetic ring on the side connecting to the PCB board 2. The U-shaped magnetic ring is integrated with the copper busbar through injection molding to form a u-shield structure 11.

[0012] More preferably, the u-shield structure 11 is arranged in a staggered manner, and each of the three-phase connected TM module and the three-phase connected GM module corresponds to three u-shield structures 11.

[0013] More preferably, the PCB board 2 integrates multiple MELEXIS sensor chips 21, each of which corresponds one-to-one with the u-shield structure 11 and is arranged in a staggered manner.

[0014] More preferably, the PCB board 2 is also provided with PCB board mounting holes 23, PCB secondary positioning holes and PCB main positioning holes.

[0015] More preferably, a low-voltage connector 22 is provided on each side of the PCB board 2.

[0016] More preferably, one side of the low-voltage connector is fixed to the PCB board 2 by SMT surface mounting, and the other side is connected to the power board by FFC.

[0017] Preferably, the copper busbar injection molded part is also provided with an embedded nut 162 and an internal threaded insert 161.

[0018] Preferably, the three-phase output terminal TM14 is riveted to the first power module of the inverter brick with screws, and the three-phase adapter terminal TM13 is riveted to the wiring terminal of the drive motor with screws; the three-phase output terminal GM15 is riveted to the second power module of the inverter brick with screws, and the three-phase adapter terminal GM12 is riveted to the wiring terminal of the generator motor with screws.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In this utility model, the three-phase connection component includes a PCB board and an injection-molded copper busbar connection device. The injection-molded copper busbar connection device is arranged in a parallel structure, and each three-phase output terminal and three-phase conversion terminal is arranged in a Z-shape and distributed diagonally. Through the structural design of its injection-molded copper busbar connection device, the output of dual currents in the same direction is realized.

[0021] 2. In this utility model, the U-shaped magnetic ring and the copper busbar injection molded part are integrated into one unit through injection molding process. The structural design of the PCB board and the injection molded copper busbar connection device effectively integrates the functions of the magnetic ring, PCB, chip and copper busbar. On the basis of ensuring the structural stability and heat dissipation of the connector, the copper busbar and chip are flexibly arranged to optimize the space utilization and achieve a compact layout. The injection molded copper busbar connection device is the optimal dual-module top and bottom distribution with same side outflow structure, which has high integration and simple structure.

[0022] 3. In this invention, the arrangement of the u-shield and the chip is optimized. The u-shield is a U-shaped magnetic ring injection molded together with a copper busbar to enhance the magnetic field shielding effect. By arranging the chip and copper busbar in a staggered manner, the problem of magnetic field interference between adjacent copper busbars is effectively solved, improving the overall magnetic field shielding effect, thereby ensuring the normal operation of the sensor chip and enhancing the stability and reliability of the system. Attached Figure Description

[0023] Figure 1 This is an exploded view of the three-phase connection component in this utility model;

[0024] Figure 2 This is a front view of the three-phase connection component in this utility model;

[0025] Figure 3 This is a rear view of the three-phase connection assembly in this utility model;

[0026] Figure 4 This is a schematic diagram of the injection molded part of the three-phase connection component in this utility model;

[0027] Figure 5 This is a structural diagram of the internal copper busbar in the three-phase connection assembly of this utility model;

[0028] Figure 6 This is a schematic diagram of the current sensor PCB board 2 in the three-phase connection assembly of this utility model;

[0029] In the diagram, 1 is the injection-molded copper busbar connection device, 11 is the u-shield structure, 12 is the three-phase adapter terminal GM, 13 is the three-phase adapter terminal TM, 14 is the three-phase output terminal TM, 141 is the copper busbar welding nut for the three-phase adapter terminal TM, 15 is the three-phase output terminal GM, 151 is the copper busbar welding nut for the three-phase adapter terminal GM, 16 is a plastic part, 161 is an internally threaded insert, 162 is an embedded nut, and 17 is the center hole of the chip corresponding to the three-phase copper busbar; 2 is the PCB board, 21 is the chip, 22 is the low-voltage connector, 23 is the PCB board mounting hole, 24 is the PCB board secondary positioning hole, and 25 is the PCB board main positioning hole; 3 is a screw. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] In this embodiment, a three-phase connection component for bidirectional parallel application of dual motors is used, including a PCB board 2 and an injection-molded copper busbar connection device 1. The PCB board 2 and the injection-molded copper busbar connection device 1 are connected by screws 3.

[0033] The injection-molded copper busbar connection device 1 includes a copper busbar injection molded part and a three-phase connection module; the three-phase connection module includes a three-phase connection TM (Traction Motor) module and a three-phase connection GM (Generator Motor) module, which are arranged in a side-by-side structure.

[0034] The three-phase connection TM module includes a three-phase output terminal TM14 and a three-phase adapter terminal TM13; the three-phase connection GM module includes a three-phase output terminal GM15 and a three-phase adapter terminal GM12; each three-phase output terminal and three-phase adapter terminal is arranged in a Z-shape and distributed diagonally above and below;

[0035] The injection-molded copper busbar also integrates a U-shaped magnetic ring on the side connected to the PCB board 2. The U-shaped magnetic ring is integrated with the copper busbar through injection molding to form a u-shield structure 11.

[0036] The main technical problem to be solved in this solution is: given the existing dual-power module structure, within a limited structural space, design a compact, highly integrated copper busbar connection component structure that can both meet the requirements of unidirectional dual current output and avoid crosstalk with the magnetic field of chip 21.

[0037] To achieve the above technical objectives, this solution provides a compact, three-phase parallel, same-side-out, multi-functional integrated high-voltage connection assembly. The three-phase connection assembly includes: a copper busbar, a plastic component 16, a current sensor PCB board 2, a u-shield structure 11, a MELEXIS sensor chip 21, and a low-voltage connector.

[0038] The three-phase connection assembly is characterized by comprising a three-phase connection TM module and a three-phase connection GM module. The three-phase connection TM module includes a three-phase output terminal TM14 connected to the first power module of the inverter brick, and a three-phase adapter terminal TM13 connected to the wiring terminal of the drive motor. The three-phase connection GM module includes a three-phase output terminal GM15 connected to the second power module of the inverter brick, and a three-phase adapter terminal GM12 connected to the wiring terminal of the generator motor.

[0039] Schematic diagram of current sensor PCB board 2 as shown in Figure 2 Figure 6 As shown, its specific design is mainly for the sake of compact structure, combining it with the three-phase connection component design. The board will also integrate external low-voltage signal terminals to make more efficient use of space.

[0040] Meanwhile, the PCB board 2 is fixed to the plastic-coated part of the three-phase connection assembly by screws 3.

[0041] This solution is an injection-molded copper busbar connection assembly. The u-shield structure 11 is a U-shaped magnetic ring injection-molded together with the copper busbar to enhance the magnetic field shielding effect. The three-phase connection assembly TM module and GM module each integrate 3 U-shaped magnetic rings, so a total of six sensor chips 21 are integrated on the PCB board 2;

[0042] Due to the limited space, the aforementioned problem arises: there is mutual magnetic field crosstalk between the three-phase connection component TM and the three-phase copper busbars of each module of GM to the chip 21. To solve this problem, this solution designs the u-shield structure 11 in a staggered arrangement while meeting the structural width constraints, thereby improving the reliability and stability of the electronic equipment and achieving the design requirements.

[0043] The staggered distribution of the u-shield structure 11 corresponds to the staggered distribution of the chip 21. This method can also be used in cases where there is no u-shield structure 11.

[0044] Based on the arrangement of the dual power module's upper and lower structures and the consistency of the outflow direction, the TM and GM three-phase output terminals of the three-phase connection component are arranged in an upper and lower structure, and their corresponding adapter terminals also have this structure. The overall design is a side-by-side integrated structure.

[0045] To optimize the structure of the adapter assembly, copper busbars are combined with nuts to connect the inverter's functional modules, serving both a connection function and a fixed support function.

[0046] The low-voltage connector is fixed to the sensor board via SMT surface mount technology and then connected to the power board via FFC.

[0047] The structure provided by this solution is the optimal dual-module top-bottom distributed outflow structure, which has high integration and simple structure.

[0048] The exploded view of the three-phase connection assembly in this scheme is as follows: Figure 1 As shown, it includes a copper busbar injection molded part and a sensor PCB board 2; the structure includes a three-phase output terminal TM14 / adapter terminal TM and a three-phase output terminal GM15 / adapter terminal GM;

[0049] The front view of the three-phase connection assembly in this scheme is as follows: Figure 2 As shown, the u-shield structure 11 (U-shaped electromagnetic shielding structure) is integrated into the copper busbar injection molded part, as shown in the rear view. Figure 3 As shown in the figure, 111-116 are the distribution positions of the six u-shield structures 11 in the plastic part 16. This staggered structural design can maximize the use of limited space while minimizing magnetic field interference between the three-phase copper busbars.

[0050] Multiple MELEXIS sensor chips 21 are integrated on the current sensor PCB board 2 to meet the needs of current monitoring and control. The layout of the chips 21 also needs to take into account the magnetic field interference problem, and their positions should be matched with the u-shield structure 11. Each chip 21 needs to be paired with a u-shield structure 11.

[0051] The injection molded parts of the three-phase connection PCB board 2 assembly in this solution are as follows: Figure 4 As shown, PCB board 2 is fixed to the nut embedded in the copper busbar injection molded part by screw 3; its positioning method is through the main and auxiliary positioning holes on the board.

[0052] Two low-voltage connectors 22 are fixed on the PCB board 2 by SMT (Surface Mount Technology). They transmit the TM and GM signals to the power board of the inverter through FFC (Flexible Flat Cable).

[0053] Based on the dual-motor structure and power module layout of this solution, as follows: Figure 5 As shown, a design was created.

[0054] A compact copper busbar connection method is used, with the overall copper busbar structure arranged in a side-by-side, Z-shaped configuration. The TM module output terminals 14 and adapter terminals 13 are diagonally distributed, as are the GM module output terminals 15 and adapter terminals 12. Simultaneously, the TM and GM modules are arranged vertically.

[0055] The TM module output terminal 14 is connected to the inverter power module 1, and the GM module output terminal 15 is connected to the inverter power module 2; the TM module adapter terminal 13 is connected to the drive motor, and the GM module...

[0056] The adapter terminal 12 is connected to the generator motor; the connection method is to rivet it with screws 3.

[0057] The integrated TM and GM modules mentioned above achieve simultaneous outflow in the same direction, with a compact structure and features stability, functionality, and durability.

[0058] This solution offers significant advantages. In the context of multi-power module integrated design, it provides an innovative solution for existing dual-power module structures that can both meet the requirements of a compact, highly integrated copper busbar connection component structure for dual current output in the same direction and effectively avoid crosstalk with the magnetic field of chip 21. Specifically, this is reflected in the following points:

[0059] The structure provided by this solution integrates the U-shaped magnetic ring (u-shield structure 11) and the copper busbar injection molded part into one unit through injection molding process, thereby effectively integrating the functions of the magnetic ring, PCB, chip 21 and copper busbar;

[0060] The optimized u-shield structure 11 design effectively solves the problem of magnetic field interference between adjacent copper busbars by staggering their arrangement, improves the overall magnetic field shielding effect, thereby ensuring the normal operation of the sensor chip 21 and improving the stability and reliability of the system.

[0061] This solution ensures the structural stability and heat dissipation of the connectors, while flexibly arranging the copper busbars and chip 21 to optimize space utilization and achieve a compact structural layout.

[0062] Due to the versatility and flexibility of its structure, this solution is also suitable for connection components with other copper busbar layouts and magnetic field shielding, such as electronic chips 21 that do not require U-shaped magnetic rings.

[0063] This injection-molded copper busbar connector assembly and its anti-magnetic interference design, through the innovative u-shield structure 11, chip 21 and copper busbar design, solves the key technical problems in the integrated design of dual power modules, and significantly improves the performance and reliability of the connector assembly.

[0064] Using the methods described above, this solution's three-phase parallel, same-side-out multifunctional integrated high-voltage connection assembly effectively solves the technical challenges of copper busbar layout, while reducing magnetic field crosstalk and improving equipment reliability and stability. This innovative design has significant application value and broad market prospects in fields such as new energy vehicles and power conversion equipment.

[0065] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A bidirectional side-by-side applicable dual-motor three-phase connection assembly, characterized by It includes a PCB board (2) and an injection-molded copper busbar connecting device (1), wherein the PCB board (2) and the injection-molded copper busbar connecting device (1) are connected by screws (3); Among them, the injection-molded copper busbar connection device (1) includes a copper busbar injection molded part and a three-phase connection module; the three-phase connection module includes a three-phase connection TM module and a three-phase connection GM module, which are arranged in a side-by-side structure. The three-phase connection TM module includes a three-phase output terminal TM (14) and a three-phase adapter terminal TM (13); the three-phase connection GM module includes a three-phase output terminal GM (15) and a three-phase adapter terminal GM (12); each three-phase output terminal and the three-phase adapter terminal are arranged in a Z-shape and are distributed diagonally above and below each other.

2. A three-phase connection assembly for bidirectional parallel application of dual motors as described in claim 1, characterized in that, The injection-molded copper busbar also integrates a U-shaped magnetic ring on the side connected to the PCB board (2). The U-shaped magnetic ring is integrated with the copper busbar through injection molding to form a u-shield structure (11).

3. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 2, characterized in that, The u-shield structure (11) is arranged in a staggered manner, and the three-phase connected TM module and the three-phase connected GM module each correspond to three u-shield structures (11).

4. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 3, characterized in that, The PCB board (2) integrates multiple MELEXIS sensor chips (21), and the MELEXIS sensor chips (21) correspond one-to-one with the u-shield structure (11).

5. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 4, characterized in that, The MELEXIS sensor chips (21) are arranged in a staggered manner.

6. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 4, characterized in that, The PCB board (2) is also provided with PCB board mounting holes (23), PCB board secondary positioning holes (24) and PCB board main positioning holes (25).

7. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 4, characterized in that, The PCB board (2) has a low-voltage connector (22) on each side.

8. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 7, characterized in that, The low-voltage connector is fixed to the PCB board (2) on one side by SMT surface mounting, and connected to the power board on the other side by FFC.

9. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 1, characterized in that, The copper busbar injection molded part is also provided with an embedded nut (162) and an internal thread insert (161).

10. A three-phase connection assembly for bidirectional parallel application of dual motors according to claim 1, characterized in that, The three-phase output terminal TM (14) is riveted to the first power module of the inverter brick by screws, and the three-phase adapter terminal TM (13) is riveted to the wiring terminal of the drive motor by screws; the three-phase output terminal GM (15) is riveted to the second power module of the inverter brick by screws, and the three-phase adapter terminal GM (12) is riveted to the wiring terminal of the generator motor by screws.

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