High-voltage port filtering device, motor controller and electric driving system

Abstract

The utility model belongs to the technical field of motor controllers, and provides a high-voltage port filtering device, a motor controller and an electric driving system, and the high-voltage port filtering device comprises a first busbar, a second busbar and a magnetic ring structural member. The first busbar and the second busbar are arranged side by side, and the large side surface of the first busbar and the large side surface of the second busbar are oppositely arranged; the magnetic ring structural member is provided with a first via hole for the first busbar to pass through, a second via hole for the second busbar to pass through and a partition air gap, and the partition air gap is respectively communicated with the first via hole and the second via hole. According to the scheme, common-mode noise suppression and differential-mode noise suppression can be realized on the magnetic ring structural member, so that the electromagnetic compatibility of the filtering device is improved, the application number of corresponding capacitors is reduced, and the application cost is further reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of motor controllers, and specifically relates to a high-voltage port filtering device, a motor controller and an electric drive system. Background Art

[0002] With the continuous iteration of technology, the requirements for electromagnetic compatibility of motor controllers are getting higher and higher, while the requirements for the cost and space of the controller are becoming more and more stringent. The high-voltage filter in the traditional motor controller adopts a standard two-pin outlet method. The pins are welded to the PCB board, and the PCB board is bolted to the high-voltage copper busbar. The magnetic ring generally adopts a common-mode magnetic ring. However, this type of magnetic ring has basically no inhibitory effect on differential mode noise. In order to suppress differential mode noise, it is necessary to add additional X capacitors of the corresponding frequency band; moreover, the routing of the high-voltage positive and negative busbars is a flat parallel routing. The magnetic field under this routing cannot form coupling and cancellation, and has no inhibitory effect on noise; and in order to meet the electromagnetic compatibility performance requirements of the controller, more capacitors can only be used in series and parallel, which is very unfriendly to the cost and reliability of the filter. Utility Model Content

[0003] In order to overcome at least one disadvantage of the above-mentioned prior art, the purpose of the present application is to provide a high-voltage port filtering device, a motor controller and an electric drive system.

[0004] The technical means adopted by this application to solve the above technical problems are:

[0005] On the one hand, an embodiment of the present application provides a high-voltage port filter device, comprising a first busbar, a second busbar and a magnetic ring structure; the first busbar and the second busbar are arranged side by side with each other, and the large side surface of the first busbar and the large side surface of the second busbar are arranged opposite to each other;

[0006] The magnetic ring structure is provided with a first through hole for the first busbar to pass through, a second through hole for the second busbar to pass through, and a partition air gap, and the partition air gap is connected to the first through hole and the second through hole respectively.

[0007] In the embodiment scheme of the present application, by redesigning the arrangement between the first busbar and the second busbar and the internal structure of the magnetic ring structure, it is possible to facilitate common-mode noise suppression and differential-mode noise suppression on the magnetic ring structure, thereby improving the electromagnetic compatibility of the filtering device, reducing the number of corresponding capacitors used, and further reducing the application cost.

[0008] In some embodiments, a reserved gap is formed between the first busbar and the second busbar, and a length of the partition air gap is greater than or equal to a width of the reserved gap.

[0009] In the embodiment of the present application, by setting the isolating air gap, it is convenient to control the saturation current of the magnetic ring, and prevent the magnetic core from saturating and losing impedance due to excessive current.

[0010] In some embodiments, an insulating barrier layer is disposed between the reserved gaps.

[0011] In the embodiment of the present application, the insulating barrier layer is provided to form a barrier between the first busbar and the second busbar, thereby preventing the electrical gap between the first busbar and the second busbar from being too small, thereby improving application safety.

[0012] In some embodiments, a plurality of filter capacitors are further included, and a copper busbar is disposed on the filter capacitor;

[0013] The connection copper bus is electrically connected to the first bus bar and / or the second bus bar.

[0014] In the embodiment of the present application, by providing the wiring copper busbar, it is possible to increase the contact area of ​​the filter capacitor during installation and connection, thereby improving the reliability of the filter capacitor after installation.

[0015] In some embodiments, the connection copper busbar is connected to the first busbar and / or the second busbar by welding.

[0016] In the embodiment of the present application, by setting the wiring copper busbar to be welded to the first busbar and the second busbar, the contact impedance can be greatly reduced and the connection reliability between the wiring copper busbar and the first busbar and the second busbar can be improved.

[0017] In some embodiments, the magnetic ring structure includes a first magnetic ring and a second magnetic ring, and the first magnetic ring and the second magnetic ring are spliced ​​with each other to form the first via hole, the second via hole and the isolation air gap.

[0018] In the embodiment of the present application, by configuring the magnetic ring structure to include the first magnetic ring and the second magnetic ring, it is possible to facilitate the installation of the first busbar and the second busbar on the magnetic ring structure, and the installation can be more convenient and flexible.

[0019] In some embodiments, a bending portion is provided on the first busbar and / or the second busbar, and the bending portion is penetrated on the magnetic ring structure.

[0020] In the embodiment scheme of the present application, the bending portion is set to facilitate the installation of the first busbar and the second busbar on the magnetic ring structure to meet the control design requirements of the saturation current; at the same time, the controllability of the reserved gaps at other locations between the first busbar and the second busbar can be maintained.

[0021] In some embodiments, the first busbar and / or the second busbar is provided with a flange portion for electrical connection.

[0022] In the embodiment of the present application, the flange portion is provided to facilitate electrical connection between the first busbar, the second busbar and external equipment, which is more convenient in application.

[0023] On the other hand, an embodiment of the present application provides a motor controller, in which the high-voltage port filtering device as described above is disposed.

[0024] In the embodiment of the present application, by applying the high-voltage port filtering device as described above in the motor controller, the electromagnetic compatibility of the motor controller can be improved; at the same time, the common-mode noise suppression and differential-mode noise suppression are integrated on the magnetic ring structure, which can reduce the space occupied by the filtering device in the motor controller and facilitate cost control.

[0025] On the other hand, an embodiment of the present application provides an electric drive system, in which the high-voltage port filter device as described above is arranged;

[0026] Or, a motor controller as described above is arranged therein.

[0027] In the embodiment of the present application, by applying the high-voltage port filtering device or the motor controller as described above in the electric drive system, the application performance of the electric drive system can be improved and cost control can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the high-voltage port filtering device of this application.

[0030] Figure 2 This is a schematic diagram of the structure of the magnetic ring structure of this application.

[0031] Figure 3 Schematic diagram of common mode noise suppression of the magnetic ring structure of this application.

[0032] Figure 4 Schematic diagram of differential mode noise suppression of the magnetic ring structure of this application.

[0033] Figure 5 This is a schematic diagram of the installation of the filter capacitor for this application.

[0034] Marking Description:

[0035] 1-first busbar, 11-reserved gap, 12-bending portion, 13-flanging portion;

[0036] 2- Second busbar;

[0037] 3-magnetic ring structure, 31-first through hole, 32-second through hole, 33-isolation air gap, 301-first magnetic ring, 302-second magnetic ring;

[0038] 4- filter capacitor, 41- wiring copper busbar. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0040] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0041] like Figure 1-5As shown, a high-voltage port filtering device is provided in this embodiment, including a first busbar 1, a second busbar 2, a magnetic ring structure 3 and a plurality of filter capacitors 4, wherein the first busbar 1 and the second busbar 2 are arranged in the magnetic ring structure 3, and the plurality of filter capacitors 4 are electrically connected to the first busbar 1 and / or the second busbar 2.

[0042] As one application example, the first busbar 1 and the second busbar 2 are flat and long structural members. When installed, the first busbar 1 and the second busbar 2 are arranged side by side with each other, and the large side surface of the first busbar 1 and the large side surface of the second busbar 2 are arranged opposite to each other. Figure 1 , Figure 5 shown.

[0043] At this time, the first busbar 1 and the second busbar 2 are arranged side by side in an upright manner. Compared with the flat side by side arrangement in the traditional technology, the busbar arrangement in this embodiment can occupy less vertical projection space.

[0044] Furthermore, a first through hole 31, a second through hole 32 and a partitioning air gap 33 are provided on the magnetic ring structure 3; wherein, the first through hole 31 can facilitate the penetration and installation of the first busbar 1 on the magnetic ring structure 3, and the second through hole 32 can facilitate the penetration and installation of the second busbar 2 on the magnetic ring structure 3, and the partitioning air gap 33 is respectively connected to the first through hole 31 and the second through hole 32, thereby isolating the magnetic ring structure 3 in the penetration direction of the first through hole 31 and the second through hole 32.

[0045] In some embodiments, Figure 3 As shown, when common mode noise flows through the device, the inner magnetic flux in the middle of the magnetic ring structure 3 will cancel each other out; while the annular magnetic flux on the periphery of the magnetic ring structure 3 will overlap with each other to produce a suppressive effect.

[0046] In some embodiments, Figure 4 As shown, when differential mode noise flows through the device, magnetic lines of force with opposite phases are distributed on the periphery of the magnetic ring structure 3, so magnetic flux saturation will not occur; while the inner magnetic flux in the middle of the magnetic ring structure 3 will be superimposed on each other, and due to the existence of the isolation air gap 33, the magnetic permeability of the inner magnetic flux is reduced, thereby avoiding magnetic flux saturation and further playing a suppressive role.

[0047] By redesigning the arrangement between the first busbar 1 and the second busbar 2, it is possible to reduce the vertical projection space occupied by the busbar setting, which is convenient for space optimization design; at the same time, through the isolation air gap 33 set inside the magnetic ring structure 3, it is convenient to control the magnetic ring saturation current to prevent the magnetic core from saturating and losing impedance after the current is too large, and it is convenient to achieve common-mode noise suppression and differential-mode noise suppression on the magnetic ring structure 3, thereby improving the electromagnetic compatibility of the filtering device, reducing the number of corresponding suppression capacitors used, and further reducing the application cost.

[0048] As an application example, a reserved gap 11 is formed between the first busbar 1 and the second busbar 2. Figure 5 As shown; wherein, the reserved gap 11 can be set as small as possible so that the first busbar 1 and the second busbar 2 can fit as closely as possible. When currents in opposite directions are passed through the first busbar 1 and the second busbar 2, the formed magnetic rings can cancel each other out, thereby playing a role in suppressing differential mode signals.

[0049] In some embodiments, an insulating barrier layer is provided between the reserved gaps 11 , and the insulating barrier layer may be made of insulating materials such as rubber.

[0050] By setting the insulating barrier layer, an insulating barrier can be formed between the first busbar 1 and the second busbar 2 to prevent the electrical gap between the first busbar 1 and the second busbar 2 from being too small, thereby improving application safety.

[0051] As one application example, the plurality of filter capacitors 4 are each provided with a wiring copper busbar 41. Compared with the conventional method of providing wiring pins on the filter capacitor 4, the wiring copper busbar 41 can effectively increase the contact area of ​​the filter capacitor 4 during installation and connection, thereby improving the reliability of the filter capacitor 4 after installation.

[0052] In some embodiments, the filter capacitor 4 is conductively connected to the first busbar 1 and / or the second busbar 2 via the wiring copper busbar 41 .

[0053] In some embodiments, the connection copper busbar 41 is connected to the first busbar 1 and / or the second busbar 2 by welding.

[0054] By setting the wiring copper bus 41 to be welded to the first busbar 1 and the second busbar 2, compared with the bolt-fixed connection method in traditional technology, the contact impedance can be greatly reduced, and the connection reliability between the wiring copper bus 41 and the first busbar 1 and the second busbar 2 can be improved, and the required occupied space can be further reduced.

[0055] As an application example, the magnetic ring structure 3 includes a first magnetic ring 301 and a second magnetic ring 302 , and the first magnetic ring 301 and the second magnetic ring 302 are spliced ​​with each other to form the first via hole 31 , the second via hole 32 and the isolation air gap 33 .

[0056] In some embodiments, the first magnetic ring 301 and the second magnetic ring 302 are symmetrically arranged; for example, the first magnetic ring 301 and the second magnetic ring 302 are both arranged in an "E" shape.

[0057] By configuring the magnetic ring structure 3 to include the first magnetic ring 301 and the second magnetic ring 302 , it is possible to facilitate the installation of the first busbar 1 and the second busbar 2 on the magnetic ring structure 3 , and the installation can be more convenient and flexible.

[0058] As one application example, according to the control design requirements of the saturation current, there is a case where the length of the isolation air gap 33 is greater than or equal to the width of the reserved gap 11. When the length of the isolation air gap 33 is large, if the length of the isolation air gap 33 is still kept equal to the width of the reserved gap 11, the differential mode signal suppression effect between the first busbar 1 and the second busbar 2 will be reduced.

[0059] In some embodiments, a bending portion 12 is provided on the first busbar 1 and / or the second busbar 2 , and during installation, the bending portion 12 is passed through the magnetic ring structure 3 .

[0060] By setting the bending portion 12, it is easy to realize the installation of the first busbar 1 and the second busbar 2 on the magnetic ring structure 3 to meet the control design requirements of the saturation current; at the same time, the controllability of the reserved gap 11 at other parts between the first busbar 1 and the second busbar 2 can be maintained, so that the first busbar 1 and the second busbar 2 can still maintain a close side-by-side state at other parts, such as Figure 1 shown.

[0061] In some embodiments, a plurality of flanges 13 are further provided on the first busbar 1 and / or the second busbar 2. The flanges 13 can facilitate electrical connection between the first busbar 1, the second busbar 2 and external devices, making application more convenient.

[0062] In addition, this embodiment also provides a motor controller, in which the high-voltage port filtering device as described above is arranged.

[0063] By applying the high-voltage port filtering device as described above in the motor controller, the electromagnetic compatibility of the motor controller can be improved; at the same time, the common-mode noise suppression and differential-mode noise suppression are integrated on the magnetic ring structure 3, which can reduce the space occupied by the filtering device in the motor controller and facilitate cost control.

[0064] On the other hand, this embodiment also provides an electric drive system, in which the high-voltage port filter device as described above is arranged; or, in which the motor controller as described above is arranged.

[0065] By applying the high-voltage port filter device or the motor controller as described above in the electric drive system, the application performance of the electric drive system can be improved and cost control can be achieved when the electric drive system is installed.

[0066] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A high-voltage port filtering device, characterized in that: It includes a first busbar, a second busbar and a magnetic ring structure; the first busbar and the second busbar are arranged side by side with each other, and the large side surface of the first busbar and the large side surface of the second busbar are arranged opposite to each other; The magnetic ring structure is provided with a first through hole for the first busbar to pass through, a second through hole for the second busbar to pass through, and a partition air gap, and the partition air gap is connected to the first through hole and the second through hole respectively.

2. The high-voltage port filter device according to claim 1, characterized in that: A reserved gap is formed between the first busbar and the second busbar, and a length of the partition air gap is greater than or equal to a width of the reserved gap.

3. The high-voltage port filter device according to claim 2, characterized in that: An insulating barrier layer is arranged between the reserved gaps.

4. The high-voltage port filter device according to any one of claims 1 to 3, characterized in that: It also includes a plurality of filter capacitors, on which a wiring copper bus is arranged; The connection copper bus is electrically connected to the first bus bar and / or the second bus bar.

5. The high-voltage port filtering device according to claim 4, characterized in that: The connection copper busbar is connected to the first busbar and / or the second busbar by welding.

6. The high-voltage port filter device according to claim 1 or 5, characterized in that: The magnetic ring structure comprises a first magnetic ring and a second magnetic ring, and the first magnetic ring and the second magnetic ring are spliced ​​with each other to form the first via hole, the second via hole and the isolation air gap.

7. The high-voltage port filter device according to claim 6, characterized in that: The first busbar and / or the second busbar is provided with a bending portion, and the bending portion is penetrated through the magnetic ring structure.

8. The high-voltage port filter device according to claim 7, characterized in that: The first busbar and / or the second busbar is provided with a flange portion for electrical connection.

9. A motor controller, characterized in that: A high-voltage port filter device as described in any one of claims 1 to 8 is arranged therein.

10. An electric drive system, characterized in that: A high-voltage port filter device as described in any one of claims 1 to 8 is arranged therein; Or, a motor controller as claimed in claim 9 is arranged therein.

Images