Modularized EMC filter of electric drive system

Abstract

The utility model provides a modularized EMC filter of an electric drive system, which comprises a magnetic ring assembly and a capacitor assembly, and is characterized in that the magnetic ring assembly comprises a magnetic ring, an anode copper bar and a cathode copper bar; wherein the positive electrode copper bar and the negative electrode copper bar detachably penetrate through the interior of the magnetic ring; the positive electrode copper bar and the negative electrode copper bar are respectively provided with at least two copper bar through holes with corresponding positions; the capacitor assembly is provided with at least two groups of capacitor suites, the capacitor suites and the magnetic rings are arranged in parallel, the capacitor suites are respectively and fixedly connected with the positive electrode copper bar and the negative electrode copper bar through the copper bar through holes to form the CLC type filter, various magnetic rings can be considered, and the CLC type filter can be developed according to different electric drive assembly project development requirements. Redesign of the filter is avoided by changing the sizes of the positive and negative copper bars or setting the number of the capacitor assemblies. And meanwhile, the device has the advantage of small size.

Description

Technical Field

[0001] This utility model relates to the field of EMC filter technology for electric drive systems, and specifically to a modular EMC filter for electric drive systems. Background Technology

[0002] An electric drive EMC filter is a device used for electromagnetic compatibility (EMC). It is primarily installed at the high-voltage DC port to filter electromagnetic interference within the electric drive system. Its purpose is to confine electromagnetic interference within the controller or dissipate it through the inductor, thereby ensuring the normal operation and stability of the system.

[0003] Currently, the commonly used filter circuit topologies are mainly CLC and LCLC type filters. These filters are specifically designed for high-current applications in electric drives. Their inductors typically use ferrite or nanocrystalline magnetic rings and can only be wound with a single turn. This means that the ferrite or nanocrystalline material needs to be wound around both the positive and negative terminals of the electric drive's DC bus. Since these filters are used in high-voltage applications, their capacitors must be high-voltage safety capacitors. CLC Π-type filters composed of inductors and safety capacitors, as well as combinations of multiple Π-type filters, have proven effective in filtering interference in electric drives. However, existing technologies still have the following drawbacks:

[0004] 1. The filter is too large.

[0005] 2. Different electric drive assembly projects require redesigning filters during development, which inevitably increases the workload and development cycle.

[0006] 3. The redesigned filter requires redesigning and reprocessing the molds, which increases production costs. Utility Model Content

[0007] The technical problem to be solved by this invention is how to design a filter that can accommodate multiple magnetic rings and has a small size.

[0008] To address the aforementioned technical problems, this utility model provides a modular EMC filter for an electric drive system, comprising a magnetic ring assembly and a capacitor assembly, wherein:

[0009] The magnetic ring assembly includes a magnetic ring, a positive copper busbar, and a negative copper busbar; wherein the positive and negative copper busbars are detachably inserted through the interior of the magnetic ring; the positive and negative copper busbars are each provided with at least two copper busbar through holes corresponding to their positions;

[0010] The capacitor assembly has at least two sets of capacitor kits, which are arranged parallel to the magnetic ring. The capacitor kits are fixedly connected to the positive copper busbar and the negative copper busbar respectively through the copper busbar through holes to form a CLC type filter.

[0011] Furthermore, each set of capacitor kits has a first capacitor through hole and a fourth capacitor through hole fixed to the sample housing at both ends of its axial direction.

[0012] Each capacitor assembly is further provided with a Y capacitor CY1, an X capacitor CX1, and a Y capacitor CY2 sequentially along its axial direction from the first capacitor through-hole to the fourth capacitor through-hole; wherein:

[0013] Each of the Y capacitor CY1, X capacitor CX1, and Y capacitor CY2 is provided with an injection-molded connector that is in contact with each other.

[0014] The injection-molded connector between the Y capacitor CY1 and the X capacitor CX1 is provided with a second capacitor through hole;

[0015] The injection-molded connector between the X capacitor CX1 and the Y capacitor CY2 is provided with a third capacitor through hole.

[0016] Furthermore,

[0017] The two pins of the Y capacitor CY1 are connected to the first capacitor through hole and the second capacitor through hole, respectively.

[0018] The two pins of the X capacitor CX1 are respectively connected to the second capacitor through hole and the third capacitor through hole;

[0019] The two pins of the Y capacitor CY2 are connected to the third capacitor via and the fourth capacitor via, respectively.

[0020] Furthermore, the second capacitor through-hole, the third capacitor through-hole and the copper busbar through-hole have the same diameter, and the second capacitor through-hole, the third capacitor through-hole and the copper busbar through-hole are fastened with screws to connect the capacitor assembly and the magnetic ring assembly.

[0021] Furthermore, there is a gap between the positive copper busbar and the negative copper busbar located inside the magnetic ring.

[0022] Furthermore, the positive copper busbar and the negative copper busbar are respectively provided with input and output connection holes of the CLC type filter at their two ends away from the magnetic ring.

[0023] Furthermore, the magnetic ring is elliptical in shape, and magnetic ring through holes are symmetrically arranged at both ends of the major axis of the magnetic ring.

[0024] Furthermore, the magnetic ring assembly and the capacitor assembly are separate components.

[0025] Furthermore, multiple magnetic rings and capacitor kits can be combined.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This utility model combines a split magnetic ring assembly and a capacitor assembly to form a CLC-type filter, which can accommodate various magnetic rings. The size of the positive and negative copper busbars or the number of capacitor assemblies can be changed according to the development needs of different electric drive assembly projects, avoiding the need to redesign the filter. At the same time, it has the advantage of small size. Attached Figure Description

[0028] Figure 1 This is an overall structural assembly drawing disclosed in an embodiment of the present utility model;

[0029] Figure 2 This is a top view of the overall structure disclosed in the embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the magnetic ring assembly disclosed in the embodiments of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the capacitor assembly disclosed in the embodiment of this utility model.

[0032] In the picture:

[0033] 100. Magnetic ring assembly;

[0034] 110. Magnetic ring; 111. Magnetic ring through hole;

[0035] 120. Positive copper busbar; 121. Positive copper busbar through hole;

[0036] 130. Negative electrode copper busbar; 131. Negative electrode copper busbar through hole;

[0037] 200. Capacitor assembly;

[0038] 210. Capacitor kit one;

[0039] 211. First capacitor via; 212. Y capacitor CY1; 213. Second capacitor via; 214. X capacitor CX1; 215. Third capacitor via; 216. Y capacitor CY2; 217. Fourth capacitor via;

[0040] 220. Capacitor Kit Two;

[0041] 221. Fifth capacitor via; 222. Y capacitor CY3; 223. Sixth capacitor via; 224. X capacitor CX2; 225. Seventh capacitor via; 226. Y capacitor CY4; 227. Eighth capacitor via. Detailed Implementation

[0042] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0043] The present invention aims to provide a modular EMC filter for electric drive systems, which solves the problem that filters need to be redesigned when developing different electric drive assembly projects.

[0044] refer to Figure 1-2 The modular EMC filter for this electric drive system mainly consists of a separate magnetic ring assembly 100 and a capacitor assembly 200. The magnetic ring assembly 100 and the capacitor assembly 200 can be freely combined to form filters required for different electric drive assembly projects.

[0045] refer to Figure 3 The magnetic ring assembly 100 includes a magnetic ring 110, a positive copper busbar 120, and a negative copper busbar 130; wherein the positive copper busbar 120 and the negative copper busbar 130 are detachably inserted through the interior of the magnetic ring 110; the positive copper busbar 120 and the negative copper busbar 130 are respectively provided with at least two copper busbar through holes corresponding to their positions. Specifically, the positive copper busbar 120 is provided with a plurality of positive copper busbar through holes 121; the negative copper busbar 130 is provided with a plurality of negative copper busbar through holes 131.

[0046] As a further explanation of this embodiment, multiple magnetic rings 110 and capacitor kits can be configured and combined according to application requirements. A gap exists between the positive copper busbar 120 and the negative copper busbar 130 located inside the magnetic ring. Optionally, depending on project development needs, the shape of the magnetic ring assembly can be changed, selecting either a gap-type or gapless magnetic ring to accommodate various magnetic ring types, such as ferrite and amorphous material magnetic rings.

[0047] The positive copper busbar 120 and the negative copper busbar 130 are respectively provided with input and output connection holes of CLC type filter at their two ends away from the magnetic ring 110.

[0048] Preferably, the magnetic ring 110 is elliptical, and magnetic ring through holes 111 are symmetrically arranged at both ends of the long axis of the magnetic ring 110, which are the fixing through holes of the entire filter and the sample housing.

[0049] refer to Figure 4 The capacitor assembly 200 has at least two sets of capacitor modules, which are arranged parallel to the magnetic ring 110. The capacitor modules are fixedly connected to the positive copper busbar 120 and the negative copper busbar 130 through copper busbar through holes to form a CLC type filter.

[0050] As a further explanation of this embodiment, this embodiment illustrates capacitor kit one 210 and capacitor kit two 220. From Figure 4 It can be seen from this:

[0051] The capacitor kit 210 has a first capacitor through hole 211 and a fourth capacitor through hole 217 fixed to the sample housing at both ends of its axial direction. At the same time, it is also used to ground one pin of the Y capacitor CY1212 and the Y capacitor CY2216.

[0052] The capacitor assembly 210, along its axial direction from the first capacitor through-hole 211 to the fourth capacitor through-hole 217, also includes a Y capacitor CY1212, an X capacitor CX1214, and a Y capacitor CY2216. Wherein:

[0053] The Y capacitor CY1212, X capacitor CX1214, and Y capacitor CY2216 are all connected by injection-molded connectors.

[0054] The injection-molded connector between Y capacitor CY1212 and X capacitor CX1214 is provided with a second capacitor through hole 213.

[0055] The injection-molded connector between capacitor X (CX1214) and capacitor Y (CY2216) is provided with a third capacitor through-hole 215.

[0056] Furthermore:

[0057] The two pins of the Y capacitor CY1212 are connected to the first capacitor through-hole 211 and the second capacitor through-hole 213, respectively.

[0058] The two pins of capacitor X, CX1214, are connected to the second capacitor via 213 and the third capacitor via 215, respectively.

[0059] The two pins of the Y capacitor CY2216 are connected to the third capacitor via 215 and the fourth capacitor via 217, respectively.

[0060] Preferred:

[0061] The second capacitor through-hole 213 and the third capacitor through-hole 215 have the same diameter as the copper busbar through-hole, and the second capacitor through-hole 213 and the third capacitor through-hole 215 are fastened to the copper busbar through-hole by screws to connect the capacitor assembly 200 and the magnetic ring assembly 100.

[0062] Similarly:

[0063] The capacitor kit 220 has a fifth capacitor through hole 221 and an eighth capacitor through hole 227 fixed to the sample housing at both ends of its axial direction. At the same time, it is also used to ground one pin of the Y capacitor CY3222 and the Y capacitor CY4226.

[0064] Capacitor assembly 220, along its axial direction from the fifth capacitor through-hole 221 to the eighth capacitor through-hole 227, also includes Y capacitor CY3222, X capacitor CX2224, and Y capacitor CY4226, respectively. Wherein:

[0065] The Y capacitor CY3222, X capacitor CX2224, and Y capacitor CY4226 are all connected by injection-molded connectors.

[0066] The injection-molded connector between Y capacitor CY3222 and X capacitor CX2224 is provided with a sixth capacitor through hole 223.

[0067] The injection-molded connector between capacitor X (CX2224) and capacitor Y (CY4226) has a seventh capacitor through-hole 225.

[0068] Furthermore:

[0069] The two pins of the Y capacitor CY3222 are connected to the fifth capacitor via 221 and the sixth capacitor via 223, respectively.

[0070] The two pins of capacitor X, CX2224, are connected to the sixth capacitor via 223 and the seventh capacitor via 225, respectively.

[0071] The two pins of the Y capacitor CY4226 are connected to the seventh capacitor via 225 and the eighth capacitor via 227, respectively.

[0072] Preferred:

[0073] The sixth capacitor through-hole 223 and the seventh capacitor through-hole 225 have the same diameter as the copper busbar through-hole, and the sixth capacitor through-hole 223 and the seventh capacitor through-hole 225 are fastened to the copper busbar through-hole by screws to connect the capacitor assembly 200 and the magnetic ring assembly 100.

[0074] The separate magnetic ring assembly and capacitor assembly provided by this utility model can be designed as CLC type filters to meet the development needs of different electric drive assembly projects, taking into account various magnetic ring forms. Furthermore, the shape of the magnetic ring assembly can be changed as needed, selecting magnetic rings with or without air gaps. In addition, the separation of the capacitor assembly and magnetic ring assembly facilitates compatibility; CLC, LC, or CL types can all be used together, providing room for modification in early design or later optimization and facilitating mold repair.

[0075] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular EMC filter for an electric drive system, characterized in that, Includes a magnetic ring assembly (100) and a capacitor assembly (200), wherein: The magnetic ring assembly (100) includes a magnetic ring (110), a positive copper busbar (120), and a negative copper busbar (130); wherein the positive copper busbar (120) and the negative copper busbar (130) are detachably inserted through the interior of the magnetic ring (110); the positive copper busbar (120) and the negative copper busbar (130) are respectively provided with at least two copper busbar through holes corresponding to their positions; The capacitor assembly (200) is provided with at least two sets of capacitor kits. The capacitor kits are arranged parallel to the magnetic ring (110). The capacitor kits are fixedly connected to the positive copper busbar (120) and the negative copper busbar (130) respectively through the copper busbar through holes to form a CLC type filter.

2. The modular EMC filter for an electric drive system according to claim 1, characterized in that, Each set of capacitor kits has a first capacitor through hole (211) and a fourth capacitor through hole (217) fixed to the sample housing at both ends of the axial direction. Each set of capacitor modules is further provided with a Y capacitor CY1 (212), an X capacitor CX1 (214), and a Y capacitor CY2 (216) sequentially along its axial direction from the first capacitor through-hole (211) to the fourth capacitor through-hole (217); wherein: The Y capacitor CY1 (212), X capacitor CX1 (214), and Y capacitor CY2 (216) are all provided with injection-molded connectors that are in contact with each other. The injection-molded connector between the Y capacitor CY1 (212) and the X capacitor CX1 (214) is provided with a second capacitor through hole (213). The injection-molded connector between the X capacitor CX1 (214) and the Y capacitor CY2 (216) is provided with a third capacitor through hole (215).

3. The modular EMC filter for electric drive systems according to claim 2, characterized in that, The two pins of the Y capacitor CY1 (212) are connected to the first capacitor through hole (211) and the second capacitor through hole (213) respectively; The two pins of the X capacitor CX1 (214) are connected to the second capacitor through hole (213) and the third capacitor through hole (215) respectively; The two pins of the Y capacitor CY2 (216) are connected to the third capacitor via (215) and the fourth capacitor via (217), respectively.

4. The modular EMC filter for an electric drive system according to claim 2, characterized in that, The second capacitor through hole (213) and the third capacitor through hole (215) have the same diameter as the copper busbar through hole, and the second capacitor through hole (213) and the third capacitor through hole (215) are fastened to the copper busbar through hole by screws to connect the capacitor assembly (200) and the magnetic ring assembly (100).

5. The modular EMC filter for an electric drive system according to claim 1, characterized in that, There is a gap between the positive copper busbar (120) and the negative copper busbar (130) located inside the magnetic ring.

6. The modular EMC filter for an electric drive system according to claim 1, characterized in that, The positive copper busbar (120) and the negative copper busbar (130) are respectively provided with input and output connection holes of the CLC filter at their two ends away from the magnetic ring (110).

7. The modular EMC filter for an electric drive system according to claim 1, characterized in that, The magnetic ring (110) is elliptical, and magnetic ring through holes (111) are symmetrically arranged at both ends of the major axis of the magnetic ring (110).

8. The modular EMC filter for an electric drive system according to claim 1, characterized in that, The magnetic ring assembly (100) and the capacitor assembly (200) are separate components.

9. The modular EMC filter for an electric drive system according to claim 1, characterized in that, Multiple magnetic rings (110) and capacitor kits can be combined.

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