A rectifying and purifying device for a motor driver

Abstract

The present invention relates to a rectifying and purifying device for a motor driver, which comprises a mounting bracket and a diversion row. The mounting bracket is divided into a first mounting space, a second mounting space and a third mounting space arranged in sequence. One end of the diversion row is located in the second mounting space, and the other end passes through the third mounting space and is suspended. A first-order purifier is installed in the first mounting space. The first-order purifier is of an annular structure. First connecting iron sheets are arranged on both sides of the first mounting space. A second-order purifier is arranged in the second mounting space. One end of the second-order purifier is connected to the diversion row and the other end is connected to the first connecting iron sheet. Second connecting iron sheets are arranged on both sides of the third mounting space. A fifth-order purifier and a sixth-order purifier are arranged in the third space. The sixth-order purifier is arranged around the diversion row. Compared with the prior art, the present invention has the advantages of multiple functions, good purification effect, high integration level, convenience in disassembly and assembly, etc., and can meet the requirements of higher noise performance of the whole vehicle.

Description

Technical Field

[0001] The present invention relates to the field of motor drivers, and more particularly to a rectifying and purifying device for a motor driver. Background Art

[0002] In recent years, the performance requirements for new energy electric vehicles in the domestic and overseas markets have been continuously increasing, and the driving experience has also been given more attention. Under this background, new energy electric vehicles are developing rapidly towards the direction of high power, high density, high integration, multi-function, and intelligence. With the improvement of the integration level and performance of the electric drive system, the number of high-power high-voltage devices and low-voltage devices is also increasing, resulting in a more complex electromagnetic environment for the whole vehicle. In particular, in order to improve the efficiency and power density of the electric drive system, silicon carbide semiconductor materials have begun to be applied. This material itself has a very high switching frequency and working voltage. Such a high switching frequency and working voltage will generate some electrical and magnetic-related interferences on the internal and external devices of the motor controller. Therefore, during the high-frequency turn-on and turn-off processes of the power module, it has become the largest interference source in the vehicle's electrical system, which will affect the surrounding low-voltage systems, affect the driving safety of the vehicle, and also reduce the safety and reliability during the vehicle operation. Thus, vehicle manufacturers have significantly increased the requirements for the electromagnetic compatibility performance of the electric drive system and require that the electric drive system products can meet the electromagnetic compatibility performance test requirements of the whole vehicle with a load of level 4 or even level 5.

[0003] Traditional motor controllers generally adopt a rectification scheme within two stages to meet the noise test requirements of early new energy vehicles with a load, but this design scheme has become inadequate in current and future high-performance and high-integration vehicles and is difficult to meet the higher-level noise test requirements of the whole vehicle. Therefore, there is an urgent need to design an efficient rectifying and purifying device that can cover the influence in the full frequency band and has a high integration level to meet the higher-level performance requirements of the whole vehicle and improve the driving experience of the whole vehicle. Summary of the Invention

[0004] The purpose of the present invention is to provide a rectifying and purifying device for a motor driver to overcome the defects existing in the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A rectifying and purifying device for a motor driver, comprising a mounting bracket and a current guide row. The mounting bracket is divided into a first mounting space, a second mounting space, and a third mounting space arranged in sequence. One end of the current guide row is located in the second mounting space, and the other end is suspended after passing through the third mounting space. A first-order purifier wound with a nano-metal film is installed in the first mounting space. The first-order purifier is of an annular structure. First connecting iron sheets are provided on both sides of the first mounting space. A second-order purifier composed of non-polar cores is provided in the second mounting space. One end of the second-order purifier is connected to the current guide row, and the other end is connected to the first connecting iron sheet. Second connecting iron sheets are provided on both sides of the third mounting space. A fifth-order purifier composed of non-polar cores and a sixth-order purifier fired from a nickel-zinc or manganese-zinc mixed metal powder are provided in the third space. The sixth-order purifier is arranged around the current guide row. The fifth-order purifier is installed above the current guide row and connected to the current guide row, and the fifth-order purifier is also connected to the second connecting iron sheet.

[0007] Further, the current guide row includes two parallel current guide plates. The second-order purifier includes two non-polar cores located on both sides of the juxtaposed current guide plates.

[0008] Further, a third-order purifier composed of two non-polar cores is also provided in the second mounting space, located on both sides of the juxtaposed current guide plates. Each non-polar core is respectively connected to a current guide plate and a second connecting iron sheet.

[0009] Further, a fourth-order purifier composed of non-polar cores is also provided in the second mounting space, located between the juxtaposed current guide plates. Both ends of the fourth-order purifier are respectively connected to the two current guide plates.

[0010] Further, four support feet are provided on both sides of the mounting bracket. The first connecting iron sheet and the second connecting iron sheet are installed on the support feet. At the same time, calipers are provided on the first connecting iron sheet and the second connecting iron sheet for connecting each purifier.

[0011] Further, a mounting seat is provided on the first mounting space for fixing a fuse.

[0012] Further, calipers are provided on the current guide row for connecting each purifier.

[0013] Further, claw catches are provided on both sides of the mounting bracket for fixing the wire harness of the whole vehicle.

[0014] Further, the sixth-order purifier is an inductance component, composed of a first guide bar and a second guide bar. The first guide bar is reversely installed above the second guide bar, presenting a "day" - shaped structure, and two wire passing holes are formed in the middle for passing through the wire guide row.

[0015] Furthermore, one end of the current guide row located in the second installation space is provided with a through hole, and a screw hole is provided at the installation bracket corresponding to the through hole. After the high-voltage wire harness of the whole vehicle passes through the first-stage purifier, it then passes through the through hole and the screw hole and is fixed in the screw hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adopts a highly integrated structural design, integrates all components with the installation bracket as the carrier, so that the current guide row and the first and second latching pieces are injection-molded with the installation bracket as a whole, and at the same time, each purifier is integrally installed, potted and fixed on the installation bracket, thereby forming a complete rectifying and purifying device, and can also form a complete block structure. This structure can be directly assembled inside the motor controller to play a role, and has the advantages of high structural integration, good compactness, good overall rectifying and purifying effect, and easy installation and disassembly.

[0018] 2. The first-stage purifier used in the present invention is a rectifying device wound by a nano-metal film, which can be used to suppress high-frequency noise in the circuit. The second-stage, third-stage, fourth-stage, and fifth-stage purifiers are respectively composed of non-polar cores with different capacitance values in parallel to the ground. The sixth-stage purifier is fired from a mixture of Ni-Zn and Mn-Zn metal powders and is used to suppress medium-frequency noise in the circuit. The first-stage and sixth-stage purifiers are respectively sleeved on the input end and the output end of the flow guide plate. The positive and negative pins of the second-stage to fifth-stage purifiers are electrically connected to the first flow guide plate and the second flow guide plate, and the grounded pins are respectively electrically connected to the first and second latching pieces to form a rectifying and purifying circuit. In this way, the high-voltage direct current at the battery end of the whole vehicle needs to be purified by six shielding devices before entering the driver, which can completely absorb various frequencies and various types of noise, avoid some external influences from damaging the motor driver, and also avoid the influence of the motor driver on the outside world, making the purification performance of this rectifying and purifying device better.

[0019] 3. The present invention is provided with four feet on both sides of the installation bracket, which can not only be used to fix the latching pieces, but also facilitate the overall installation and fixation of the device. On both sides of the installation bracket, two pairs of symmetrically arranged claws are also provided, which can be used to fix wire harnesses such as pressure contact switches during use to prevent safety accidents caused by wire harness wear. In this way, this installation bracket has more integrated functions, such as meeting the requirements of fuse assembly, pressure contact switch assembly, etc., and at the same time can also meet the installation of multi-stage filtering devices, wire harness fixation, etc., greatly saving the assembly space inside the driver, making the filtering device more practical, more integrated, and more in line with the advantages of design selection. Description of the Drawings

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic structural diagram from another angle of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the mounting bracket.

[0023] Figure 4 It is a schematic structural diagram of the first deflector plate of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the second deflector plate of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the first and second latching iron sheets of the present invention.

[0026] Figure 7 It is a schematic structural diagram of the six - stage purifier of the present invention;

[0027] Markings in the figure: 1. Mounting bracket, 1 - 1. First square groove, 1 - 2. First limiting groove, 1 - 3. Second limiting groove, 1 - 4. Third limiting groove, 1 - 5. Fourth limiting groove, 1 - 6. Second square groove, 2. First - stage purifier, 3. Second - stage purifier, 4. Third - stage purifier, 5. Fourth - stage purifier, 6. Fifth - stage purifier, 7. Sixth - stage purifier, 7 - 1. First guide bar, 7 - 2. Second guide bar, 8. Deflection row, 8 - 1. First deflector plate, 8 - 2. Second deflector plate, 9. First latching iron sheet, 10. Second latching iron sheet, 11. Support leg, 12. Claw. Specific implementation mode

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives the detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0029] Figures 1 to 3As shown in the figure, the present application proposes a rectifying and purifying device for a motor driver. The main body part is a mounting bracket 1, on which six purifiers and a flow guide row 8 are installed. The six purifiers are respectively a first-order purifier 2, a second-order purifier 3, a third-order purifier 4, a fourth-order purifier 5, a fifth-order purifier 6 and a sixth-order purifier 7; the flow guide row 8 is two parallel flow guide plates, namely a first flow guide plate 8-1 and a second flow guide plate 8-2. Among them, the first-order purifier 2 is a rectifier wound with a nano metal film, which can be used to suppress high-frequency noise in the circuit. The second-order purifier 3, the third-order purifier 4, the fourth-order purifier 5 and the fifth-order purifier 6 are all composed of one or more non-polar cores, and at the same time, the sixth-order purifier 7 is fired from a mixture of Ni-Zn and Mn-Zn metal powders and is used to suppress medium-frequency noise in the circuit. The flow guide plates are electrically connected to the second-order purifier 3, the third-order purifier 4, the fourth-order purifier 5 and the fifth-order purifier 6 respectively, and the specific structure is as follows:

[0030] The mounting bracket 1 is divided into a first mounting space, a second mounting space, and a third mounting space which are arranged in sequence. The first flow guide plate 8-1 and the second flow guide plate 8-2 are integrated within the mounting bracket 1. One end of the flow guide row 8 is located within the second mounting space, and the other end is suspended after passing through the third mounting space. On both sides of the first mounting space, there are support feet 11, and a first iron patch 9 is installed with plastic coating on the support feet 11. Similarly, on both sides of the third mounting space, there are support feet 11; a second iron patch 10 is installed with plastic coating on the support feet 11. An annular groove is provided within the first mounting space, located at the entrance position of the mounting bracket 1. Above the annular groove, there is a first rectangular groove 1-1, that is, a mounting seat, for fixing a fuse. The first-stage purifier 2 is installed within the annular groove. Within the second mounting space, there are two symmetrical first limiting grooves 1-2 and two symmetrical third limiting grooves 1-4, located on both sides of the wire row. The two non-polar cores of the second-stage purifier 3 are respectively installed within the two first limiting grooves 1-2. At the same time, the safety circuit pins of the second-stage purifier 3 are connected to the first iron patch 9 in front of the mounting bracket 1, and the other pins are connected to the wire row. The two non-polar cores of the third-stage purifier 4 are respectively installed within the two third limiting grooves 1-4. At the same time, the safety circuit pins of the third-stage purifier 4 are connected to the second iron patch 10 behind the mounting bracket 1, and the other pins are connected to the wire row. A second limiting groove 1-3 is provided between the two flow guide plates for installing the fourth-stage purifier 5. The positive and negative pins of the fourth-stage purifier 5 are respectively welded to the first flow guide plate 8-1 and the second flow guide plate 8-2 to form a filtering circuit. The third mounting space is divided into upper and lower layers. The upper layer is provided with a fourth limiting groove 1-5, and the lower layer is a second rectangular groove 1-6. The fourth limiting groove 1-5 has a left-right symmetrical structure, and the fifth-stage purifier 6 is arranged within the two fourth limiting grooves 1-5, and its safety circuit pins are respectively connected to the second iron patch 10 behind the mounting bracket 1. The sixth-stage purifier 7 is provided with two guide bars, which are placed within the second rectangular groove 1-6 of the mounting bracket 1, and the two guide bars are sleeved on the ends of the first flow guide plate 8-1 and the second flow guide plate 8-2, one above the other. One end of the flow guide row 8 located within the second mounting space is provided with a through hole, and a screw hole is provided at the corresponding position of the mounting bracket 1. After the high-voltage wire harness of the whole vehicle passes through the first-stage purifier 2, it then passes through the through hole and the screw hole and is fixed within the screw hole.

[0031] Such as Figure 3As shown in the figure, the specific structure of the mounting bracket 1 is as follows: The first deflector 8-1, the second deflector 8-2, the first iron patch 9, and the second iron patch 10 are all integrally injection-molded with the mounting bracket 1. The annular groove is located in the first installation space of the mounting bracket 1, and a first square groove 1-1 is respectively provided directly above it. The first limiting groove 1-2, the second limiting groove 1-3, and the third limiting groove 1-4 are all located in the second installation space of the mounting bracket 1. Among them, the second limiting groove 1-3 is arranged between the first deflector 8-1 and the second deflector 8-2, and the first limiting groove 1-2 and the third limiting groove 1-4 are distributed on both sides of the deflector row 8. The second square groove 1-6 is located in the third installation space and passes through the conductive copper row. Two fourth limiting grooves 1-5 are arranged side by side directly above the second square groove 1-6. Threaded holes are provided at both ends of the first square groove 1-1, which can be used for the installation of the fuse for the motor driver. Two reinforcing ribs and two mounting posts are also provided at the front end of the first square groove 1-1, which can be used for the installation of the pressure contact switch for the motor driver. Claws 12 are provided on both sides of the mounting bracket 1 for fixing the vehicle harness.

[0032] As Figure 4 and Figure 5 shown in the figure, the input end of the first deflector 8-1 is provided with a first bend, a second bend, and a third bend. Single-serrated caliper structures are provided at the ends of the first bend and the second bend; a three-serrated caliper structure is provided at the end of the third bend for connecting the non-polar core. The input end of the second deflector 8-2 is provided with a fourth bend and a fifth bend; three-serrated caliper structures are provided at the ends of the fourth bend and the fifth bend for connecting the non-polar core.

[0033] As Figure 6 shown in the figure, the first iron patch 9 is integrally injection-molded with the support leg 11 at the front end of the mounting bracket 1, and a three-serrated caliper structure that extends vertically upward is respectively provided. The second iron patch 10 is integrally injection-molded with the support leg 11 at the rear end of the mounting bracket 1, and a three-serrated caliper structure that extends vertically upward is respectively provided.

[0034] As Figure 7 shown in the figure, the sixth-order filter is an inductor component, which is composed of a first guide bar 7-1 and a second guide bar 7-2. The first guide bar 7-1 is reversely installed above the second guide bar 7-2, presenting a "day" - shaped structure, and two wire-passing holes are formed in the middle. The first deflector 8-1 and the second deflector 8-2 pass through the wire-passing holes to complete the filtering of the stray current.

[0035] In this embodiment, the second-order purifier 3 is composed of two non-polar cores connected in parallel to the ground, and the size of each core is 4.7 nF; the third-order purifier 4 is also composed of two non-polar cores connected in parallel to the ground, and the size of each core is 330 nF; the fourth-order purifier 5 is composed of one non-polar core with a size of 680 nF; the fifth-order purifier 6 is also composed of two non-polar cores connected in parallel to the ground, and the size of each core is 220 nF. The second limiting groove 1-3 is located at the center of the mounting bracket 1, and its cross-sectional dimension is a rectangular structure with a length of 31.5 mm and a width of 10 mm; the cross-sectional dimensions of the two first limiting grooves 1-2 are rectangular structures with a length of 13.5 mm and a width of 6.5 mm, and the cross-sectional dimensions of the two third limiting grooves 1-4 are rectangular structures with a length of 13.5 mm and a width of 6.5 mm. The first limiting grooves 1-2 and the third limiting grooves 1-4 are symmetrically distributed on both sides of the second limiting groove 1-3 and are separated by a reinforcing rib in the middle.

[0036] The specific assembly process of the high-efficiency filtering device for the motor controller is as follows:

[0037] First, install the first-order purifier 2 inside the annular groove, install the sixth-order purifier 7 inside the second square groove 1-6, and use epoxy glue for potting and fixing;

[0038] Then, install the second-order purifier 3, fourth-order purifier 5, third-order purifier 4, and fifth-order purifier 6 into the first limiting groove 1-2, second limiting groove 1-3, third limiting groove 1-4, and fourth limiting groove 1-5 respectively;

[0039] Next, weld and fix the positive and negative signal pins of the second-order purifier 3 to the first current-carrying plate 8-1 and the second current-carrying plate 8-2 respectively, and weld and fix the safety loop pins to the first iron patch 9; weld and fix the positive and negative signal pins of the fourth-order purifier 5 to the first current-carrying plate 8-1 and the second current-carrying plate 8-2 respectively; weld and fix the positive and negative signal pins of the third-order purifier 4 to the first current-carrying plate 8-1 and the second current-carrying plate 8-2 respectively, and weld and fix the safety loop pins to the second iron patch 10; weld and fix the positive and negative signal pins of the fifth-order purifier 6 to the first current-carrying plate 8-1 and the second current-carrying plate 8-2 respectively, and weld and fix the safety loop pins to the second iron patch 10. After welding, use epoxy glue to fix the second-order purifier 3, third-order purifier 4, fourth-order purifier 5, and fifth-order purifier 6 in the corresponding limiting grooves on the mounting bracket 1 respectively to complete the assembly of the whole device.

[0040] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A rectifying and purifying device for a motor driver, characterized in that, It includes an installation bracket (1) and a flow guide row (8). The installation bracket (1) is divided into a first installation space, a second installation space, and a third installation space arranged in sequence. One end of the flow guide row (8) is located in the second installation space, and the other end is suspended after passing through the third installation space. A first-order purifier (2) wound with a nano-metal film is installed in the first installation space. The first-order purifier (2) is of an annular structure. First connecting iron sheets (9) are provided on both sides of the first installation space. A second-order purifier (3) composed of non-polar cores is provided in the second installation space. One end of the second-order purifier (3) is connected to the flow guide row (8), and the other end is connected to the first connecting iron sheet (9). Second connecting iron sheets (10) are provided on both sides of the third installation space. A fifth-order purifier (6) composed of non-polar cores and a sixth-order purifier (7) fired from nickel-zinc or manganese-zinc mixed metal powder are provided in the third space. The sixth-order purifier (7) is arranged around the flow guide row (8). The fifth-order purifier (6) is installed above the flow guide row (8) and connected to the flow guide row (8), and the fifth-order purifier (6) is also connected to the second connecting iron sheet (10).

2. The rectification and purification device for a motor driver according to claim 1, characterized in that, The flow guide row (8) includes two parallel flow guide plates. The second-order purifier (3) includes two non-polar cores, which are located on both sides of the juxtaposed flow guide plates.

3. The rectification and purification device for a motor driver according to claim 2, characterized in that, In the second installation space, there is also a third-order purifier (4) composed of two non-polar cores, which are located on both sides of the juxtaposed flow guide plates. Each non-polar core is respectively connected to a flow guide plate and a second connecting iron sheet (10).

4. The rectifying and purifying device for a motor driver according to claim 2, wherein, In the second installation space, there is also a fourth-order purifier (5) composed of non-polar cores, which is located between the juxtaposed flow guide plates. Both ends of the fourth-order purifier (5) are respectively connected to the two flow guide plates.

5. A rectification and purification device for a motor driver according to claim 1, characterized in that, Four feet (11) are provided on both sides of the installation bracket (1). The first connecting iron sheet (9) and the second connecting iron sheet (10) are installed on the feet (11). At the same time, calipers are provided on the first connecting iron sheet (9) and the second connecting iron sheet (10) for connecting each purifier.

6. The rectifying and purifying device for a motor driver according to claim 1, wherein, An installation seat is provided on the first installation space for fixing a fuse.

7. The rectifying and purifying device for a motor driver according to claim 1, wherein, Calipers are provided on the flow guide row (8) for connecting each purifier.

8. The rectification and purification device for a motor driver according to claim 1, characterized in that, Claws (12) are provided on both sides of the installation bracket (1) for fixing the wiring harness of the whole vehicle.

9. The rectifying and purifying device for a motor driver according to claim 1, wherein, The sixth-order purifier (7) is an inductance component, which is composed of a first guide bar (7-1) and a second guide bar (7-2). The first guide bar (7-1) is reversely installed above the second guide bar (7-2), presenting a "day"-shaped structure, and two wire passing holes are formed in the middle for passing through the wire row.

10. The rectifying and purifying device for a motor driver according to claim 1, characterized in that, One end of the flow guide row (8) located in the second installation space is provided with a through hole, and a screw hole is provided at the installation bracket (1) corresponding to the through hole. After the high-voltage wiring harness of the whole vehicle passes through the first-order purifier (2), it then passes through the through hole and the screw hole and is fixed in the screw hole.

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