Filter and motor controller

Abstract

The utility model provides a filter and a motor controller, the filter comprises a shell, a magnetic ring, a circuit board and a capacitor assembly, the shell comprises an accommodating part and a main body part, the magnetic ring is installed in the accommodating part, the capacitor assembly is connected with the circuit board, one side, close to the capacitor assembly, of the main body part is provided with a coaming, and the coaming is connected with the circuit board. The coaming is connected with the capacitor assembly, the filter further comprises a copper bar, the copper bar is connected with the capacitor assembly through the circuit board, and the coaming is connected with the capacitor assembly, so that the size of the shell can be reduced, the structure of the shell can be simplified, and the production and manufacturing cost of the filter can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of motor controllers, and in particular to a filter and a motor controller. Background Art

[0002] The filter is an important component in the motor controller and is used to process signals. The filter includes a housing, a circuit board, a magnetic ring, a copper busbar, a capacitor and other components. Each component is installed in the housing so that each component can be installed and fixed in a suitable position. In existing filters, the housing accommodates the capacitor by setting an installation cavity and encapsulating the capacitor by means of glue filling, etc. This setting method makes the housing structure complex and increases the processing and production cost of the filter. Utility Model Content

[0003] In view of this, the present application provides a filter and a motor controller to solve the problem of high filter production cost in the prior art.

[0004] The present application provides a filter, which includes a shell, a magnetic ring, a circuit board and a capacitor assembly. The shell includes a accommodating portion and a main body, the accommodating portion has a cavity, the magnetic ring is installed in the accommodating portion, the capacitor assembly is connected to the circuit board, the main body has a side close to the capacitor assembly with a surrounding plate, the surrounding plate is connected to the capacitor assembly, the filter also includes a copper busbar, the copper busbar is connected to the capacitor assembly through the circuit board, and the magnetic ring is used to filter out electromagnetic interference in the copper busbar.

[0005] In a possible implementation, the main body is provided with a plurality of the enclosures, and the enclosures are arranged along the circumference of the capacitor assembly.

[0006] In a possible implementation, the length dimension of the enclosure is L1, the height dimension of the capacitor assembly is L2, and L1 and L2 satisfy 1 / 4≤L1 / L2≤1 / 2.

[0007] In a possible implementation, the accommodating portion is located at the top of the main body along the third direction, the capacitor assembly is arranged at the bottom of the main body along the third direction, and the capacitor assembly and the magnetic ring are arranged along the third direction.

[0008] In a possible embodiment, inserts are respectively provided at both ends of the main body, and the inserts are used to set a connecting piece to fix the main body.

[0009] In a possible implementation, the outer wall of the insert is provided with a plurality of oblique lines, and the oblique lines are raised relative to the outer wall of the insert.

[0010] In a possible implementation, the shell includes a reinforcing plate, and the reinforcing plate connects the accommodating portion and the main body.

[0011] In one possible embodiment, the capacitor assembly is arranged on a side of the circuit board away from the housing along the third direction, and the copper busbar includes a first connecting segment and a second connecting segment connected to each other, a preset angle is formed between the first connecting segment and the second connecting segment, at least a portion of the first connecting segment is located on the inner side of the first through hole of the magnetic ring, and the second connecting segment is connected to the housing.

[0012] In a possible implementation manner, the capacitor component includes at least two X capacitors, two first Y capacitors, and two second Y capacitors.

[0013] The present application provides a motor controller, which includes a housing and a filter. The filter is installed inside the housing, and the filter is the filter described in any of the above embodiments.

[0014] The present application provides a filter, which includes a shell, a magnetic ring, a circuit board and a capacitor assembly. The shell includes a accommodating portion and a main body. The magnetic ring is installed in the accommodating portion. The capacitor assembly is connected to the circuit board. The main body has a side close to the capacitor assembly and the side is connected to the capacitor assembly. The filter also includes a copper busbar, which is connected to the capacitor assembly through the circuit board. By providing the side of the side connected to the capacitor assembly, the volume of the shell can be reduced, the structure of the shell can be simplified, and the production cost of the filter can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of the structure of a filter in an embodiment provided in this application;

[0017] Figure 2 A schematic structural diagram of a housing in an embodiment provided in this application;

[0018] Figure 3 An exploded diagram of a filter in an embodiment provided in this application;

[0019] Figure 4 An exploded view of a filter from another perspective in an embodiment provided in this application;

[0020] Figure 5 An exploded view of a filter in another embodiment provided in the present application;

[0021] Figure 6 This is a schematic diagram of the internal structure of a motor controller in an embodiment provided in this application.

[0022] Description of reference numerals:

[0023] 1- shell;

[0024] 11-accommodation portion;

[0025] 111- second through hole;

[0026] 112-first connecting hole;

[0027] 12-main body;

[0028] 121-hoarding;

[0029] 122-Inlay;

[0030] 13- reinforcement plate;

[0031] 2-Magnetic ring;

[0032] 21-first through hole;

[0033] 3- Circuit board;

[0034] 31-fixing hole;

[0035] 4-capacitor components;

[0036] 41-X capacitor;

[0037] 42-first Y capacitor;

[0038] 43-second Y capacitor;

[0039] 5-Copper busbar;

[0040] 51-first connecting section;

[0041] 52-second connecting section;

[0042] 53-second connecting hole;

[0043] 6-Filter;

[0044] 7-Motor controller;

[0045] 71-housing;

[0046] X-first direction;

[0047] Y-second direction;

[0048] Z-third direction. DETAILED DESCRIPTION

[0049] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0050] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0052] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0053] The filter 6 that is connected with power battery is provided with motor controller 7 inside, and the insulated gate bipolar transistor (Insulate-Gate Bipolar Transistor, IGBT) that wherein is connected with capacitor assembly 4 is in motor controller 7 and the effect of alternating current and direct current conversion, by the opening and closing order of IGBT transistor, realizes that direct current is converted into three-phase alternating current, for driving motor. IGBT can produce EMC interference in opening or closing process, and filter 6 is used for filtering the interference of EMC, reduces its leakage and causes interference to other components in motor controller 7. In the prior art, capacitor is all arranged on the inside of injection molded case by the mode of injection molding or glue injection by capacitor as a whole, causes the overall structure of filter 6 to be redundant and costly.

[0054] like Figure 1 and Figure 2As shown, the present application provides a filter 6, which includes a shell 1, a magnetic ring 2, a circuit board 3 and a capacitor assembly 4. The shell 1 includes a accommodating portion 11 and a main body 12. The accommodating portion 11 has a cavity. The magnetic ring 2 is installed in the accommodating portion 11. The capacitor assembly 4 and the circuit board 3 are connected. The main body 12 has a side close to the capacitor assembly 4 with a surrounding plate 121. The surrounding plate 121 is connected to the capacitor assembly 4. The filter 6 also includes a copper bus 5, which is connected to the capacitor assembly 4 through the circuit board 3. The magnetic ring 2 is used to filter out electromagnetic interference in the copper bus 5.

[0055] The shell 1 provided in the embodiment of the present application is used to install the circuit board 3 and the magnetic ring 2. The shell 1 includes a main body 12, and the circuit board 3 can be connected to the shell 1 by bolts, or connected to the main body 12 by bonding. The main body 12 is provided with a panel 121, which is a structure that is raised relative to the surface of the main body 12, and the panel 121 is raised in the direction close to the capacitor assembly 4. The main body 12 can be provided with a plurality of panels 121, and the plurality of panels 121 are arranged along the circumference of the main body 12. For example, at least two panels 121 can be provided, respectively, on both sides of the capacitor assembly 4, and the side walls of the capacitor assembly 4 are fitted with the panels 121, and the panels 121 and the capacitor assembly 4 are further connected by bonding, thereby achieving the installation and fixation of the capacitor assembly 4. The panels 121 are respectively provided on both sides of the capacitor assembly 4 to support and fix the capacitor assembly 4 from two different directions, which can further improve the stability of the installation of the capacitor assembly 4. The enclosure 121 can also be provided in an integral manner along the circumference of the main body 12. The enclosure 121 extends along the circumference of the main body 12 so as to be connected to multiple surfaces of the capacitor assembly 4, thereby increasing the contact area with the capacitor assembly 4 and improving the stability of the installation of the capacitor assembly 4. However, the enclosure 121 can be provided with openings or slots for avoiding other structures of the filter 6. In the prior art, the capacitor assembly 4 is provided with an additional mounting cavity, and the capacitor assembly 4 is arranged as a whole inside the mounting cavity, and needs to be encapsulated by means of glue filling. This arrangement increases the volume of the housing and increases the processing and manufacturing costs of the filter. The filter 6 provided in the embodiment of the present application realizes the installation and fixation of the capacitor assembly 4 by bonding the enclosure 121 to the capacitor assembly 4, which reduces the structure of the housing 1, simplifies the processing steps, and can reduce the processing cost of the filter 6.

[0056] The magnetic ring 2 is a magnetic annular component, and its material can be nickel-zinc ferrite, manganese-zinc ferrite or iron powder core, etc. There is a first through hole 21 in the middle of the magnetic ring 2. The shape of the cavity of the accommodating portion 11 is adapted to the shape of the magnetic ring 2. At least part of the accommodating cavity 11 can also be set to a ring shape to facilitate the fixing and installation of the magnetic ring 2. One end of the copper bus 5 is connected to the capacitor assembly 4 through the circuit board 3. Part of the copper bus 5 itself can be made into a shape extending toward the circuit board 3, thereby establishing a connection with the circuit board 3. At least part of the other end of the copper bus 5 is located in the first through hole 21 of the magnetic ring 2 or passes through the magnetic ring 2, or the copper bus 5 can be provided with an extension component for electrical connection, and the extension component passes through the magnetic ring 2 to achieve a filtering function. One side of the accommodating portion 11 has an opening, and the magnetic ring 2 can be installed in the cavity of the accommodating portion 11 through the opening, and the shell 1 can support the magnetic ring 2. As shown Figure 6 As shown, the magnetic ring 2 is annular with a first through-hole 21, and the housing 11 is correspondingly provided with a second through-hole 111. The second through-hole 111 extends through the housing 11, adapting the housing 11 to form an annular groove. Therefore, the inner wall of the housing 11 can support the magnetic ring 2 from the inside, and a portion of the copper busbar 5 can be positioned within the second through-hole 111 of the housing 11. The outer wall of the housing 11 can be provided with a first connection hole 112, and the copper busbar 5 can also be provided with a corresponding second connection hole 53. Screws can be installed through the first and second connection holes 112, 53, for mounting the copper busbar 5 to the housing 11. The copper busbar 5 can be electrically connected to the circuit board 3 through the first connection hole 112 of the housing 11, so the housing 71 also supports the copper busbar 5. The filter 6 can be provided with two copper busbars 5, one for the positive electrode and the other for the negative electrode.

[0057] like Figure 2 As shown, in a possible embodiment, the main body 12 is provided with a plurality of surrounding plates 121 , and the surrounding plates 121 are arranged along the circumference of the capacitor assembly 4 .

[0058] The multiple panels 121 can be connected to the capacitor assembly 4 from different directions, thereby supporting the capacitor assembly 4 from different angles, which can improve the stability of the installation of the capacitor assembly 4. The multiple panels 121 can be set to different sizes and shapes. When the capacitor assembly 4 includes multiple capacitors of different sizes, different panels 121 can be connected to capacitors of different sizes.

[0059] In a possible implementation, the length dimension of the enclosure 121 is L1, the height dimension of the capacitor assembly 4 is L2, and L1 and L2 satisfy 1 / 4≤L1 / L2≤1 / 2.

[0060] The length dimension of the enclosure 121 is smaller than the height of the capacitor assembly 4. The smaller size of the enclosure 121 facilitates reducing the volume of the shell 1 and simplifying the structure of the shell 1. The ratio L1:L2 of the length dimension L1 to the height dimension L2 of the enclosure 121 can be 1:4, 1:3.7, 1:3.5, 1:3.2 or 1:3, etc. The reasonable size of the enclosure 121 is set so that the enclosure 121 has enough area to abut against the side wall of the capacitor assembly 4, which can provide good support for the capacitor assembly 4, and the enclosure 121 can provide a larger bonding area to reduce the possibility of the capacitor assembly 4 shaking or detaching. When the shell 1 includes multiple enclosures 121, the multiple enclosures 121 can be set to different sizes. Specifically, each enclosure 121 can be set to a reasonable size with reference to the size of the capacitor that matches it.

[0061] like Figure 1 As shown, in a possible embodiment, the circuit board 3 has a fixing hole 31 , and the fixing hole 31 is used to install a bolt, and the bolt is used to fix and ground the circuit board 3 .

[0062] The circuit board 3 is located between the housing 1 and the capacitor assembly 4 along the third direction Z. The circuit board 3 has specific extensions at both ends along the second direction. The extensions extend along the first direction X. The extensions extend to a position that is not blocked by the housing 1 and the capacitor assembly 4. The extensions at both ends of the circuit board 3 are respectively provided with fixing holes 31. The fixing holes 31 are used to cooperate with bolts to fix the circuit board 3. The filter 6 provided in the embodiment of the present application can be set in the motor controller 7 of the vehicle to work. The circuit board 3 can be fixed to the housing 71 of the motor controller 7 by bolts. The bolts should be a conductive material, such as a metal material. Therefore, the fixing holes 31 and the bolts are connected to achieve grounding of the circuit board 3. Compared with the current filter 6 that needs to be provided with additional electrical connectors for grounding, the solution provided in the embodiment of the present application can reduce the number of components of the filter 6 and simplify the structure and grounding method of the circuit board 3.

[0063] like Figure 1 、 Figure 3 and Figure 4 As shown, in a possible embodiment, inserts 122 are respectively provided at both ends of the main body 12 , and the inserts 122 are used to set a connector to fix the main body 12 .

[0064] Insert 122 is pre-installed in the injection mold, allowing the resulting plastic part to have internal structures such as threads or electrodes. Insert 122 provides a mounting hole for main body 12. The shape of the mounting hole can be configured based on the shape of the connector. For example, if the connector is a threaded bolt, the mounting hole is a threaded hole with a threaded inner wall, facilitating the bolting of main body 12 to the housing 71 of motor controller 7.

[0065] In a possible implementation, the outer wall of the insert 122 is provided with a plurality of oblique lines, and the oblique lines are raised relative to the outer wall of the insert 122 .

[0066] The insert 122 provided in the embodiment of the present application is made of metal, has a threaded hole, and the outer wall of the insert 122 has a plurality of mutually staggered twills, which are raised relative to the outer wall of the insert 122. After the shell 1 is formed, the insert 122 can be firmly embedded in the main body 12, thereby being tightly combined with the main body 12, reducing the probability of the insert 122 being pulled off by external force.

[0067] like Figure 2 As shown, in a possible embodiment, the housing 1 includes a reinforcing plate 13 , which connects the accommodating portion 11 and the main body 12 .

[0068] The reinforcing plate 13 is used to increase the strength of the connection between the accommodating portion 11 and the main body 12. The reinforcing plate 13 is positioned at the junction of the main body 12 and the accommodating portion 11. The reinforcing plate 13 can be in the form of a thin plate to save space and reduce weight. The housing 1 can be provided with multiple reinforcing plates 13. These reinforcing plates 13 can be positioned on both sides of the accommodating portion 11, or multiple reinforcing plates 13 can be positioned on the same side of the accommodating portion 11 to increase the connection strength and reduce the possibility of deformation of the housing 1.

[0069] like Figure 1 As shown, in a possible embodiment, the capacitor assembly 4 is arranged on a side of the circuit board 3 away from the housing 1 along the third direction Z, and the copper bus 5 includes a first connecting segment 51 and a second connecting segment 52 connected to each other, and there is a preset angle between the first connecting segment 51 and the second connecting segment 52, at least a portion of the first connecting segment 51 is located on the inner side of the magnetic ring 2, and the second connecting segment 52 is connected to the housing 1.

[0070] In one possible embodiment, the accommodating portion 11 is located at the top of the main body 12 along the third direction Z, the magnetic ring 2 is installed in the accommodating portion 11, and the capacitor assembly 4 is arranged at the bottom of the main body 12 along the third direction Z, so the capacitor assembly 4 and the magnetic ring 2 are arranged along the third direction Z.

[0071] Compared to the current filter 6 in which the capacitor assembly 4 and the magnetic ring 2 are arranged along the first direction X, the filter 6 provided in the embodiment of the present application can reduce the size of the filter 6 as a whole in the first direction X, thereby making full use of the internal space of the motor controller 7 and facilitating the arrangement of other components inside the motor controller 7. The copper bus 5 is correspondingly provided with a first connecting section 51 and a second connecting section 52, and the angle between the two can be reasonably set according to the position of the magnetic ring 2 and the capacitor, so as to facilitate the arrangement and connection of the copper bus 5. Part of the first connecting section 51 can extend into the interior of the first through hole 21 of the magnetic ring 2, or the first connecting section 51 can be connected with other extension components to extend its own length, thereby indirectly extending into the interior of the magnetic ring 2.

[0072] like Figure 5 As shown, the magnetic ring 2 has an annular structure, and the centerline of the first through hole 21 of the magnetic ring 2 is parallel to the first direction X. The first through hole 21 of the magnetic ring 2 passes through the magnetic ring 2 along the first direction X, and the second through hole 111 of the accommodating portion 11 correspondingly passes through the housing 1 along the first direction X. The opening of the accommodating portion 11 is arranged along the third direction Z on the side of the accommodating portion 11 away from the copper busbar 5. The housing 1 can completely enclose the portion of the magnetic ring 2 near the copper busbar 5, thereby preventing direct contact between the copper busbar 5 and the magnetic ring 2 and facilitating assembly of the filter 6.

[0073] like Figure 4 and Figure 5 As shown, in a possible implementation manner, the capacitor component 4 includes at least two X capacitors 41 , two first Y capacitors 42 and two second Y capacitors 43 .

[0074] The X capacitor 41 is connected between the power lines, generally across the live wire and the neutral wire, for eliminating interference signals between the live wire and the neutral wire. The X capacitor 41 can suppress interference signals between the live wire and the neutral wire, and the X capacitor 41 can suppress differential mode interference. The Y capacitor is generally connected between the live wire and the ground wire and the neutral wire and the ground wire to suppress common mode interference. The capacitor assembly 4 provided in the embodiment of the present application includes two X capacitors 41, two first Y capacitors 42 and two second Y capacitors 43, wherein the first Y capacitor 42 and the second Y capacitor 43 are arranged in a group, and the two groups of Y capacitors are respectively arranged on both sides of the X capacitor 41. The number of such capacitors and the configuration of the capacitors are a configuration method with good compatibility provided by the embodiment of the present application, which can meet the needs of various application scenarios. The configuration method of the capacitors can be reduced or changed according to actual needs, and can meet the minimum cost design under the same performance, with a compatibility design that meets different topological structures.

[0075] like Figure 6As shown, an embodiment of the present application provides a motor controller 7, which includes a housing 71 and a filter 6. The filter 6 is installed inside the housing 1, and the filter 6 is the filter 6 in any of the above embodiments.

[0076] The motor controller 7 is a core component of an electric vehicle. It is typically located between the battery pack and the motor. Based on commands such as gear position, accelerator, or brake, the motor controller 7 converts the stored energy in the battery pack into the energy required to drive the motor, thereby controlling the vehicle's starting, running, forward and backward speed, and other states. The motor controller 7 includes a housing 71 , within which various components, including the filter 6, are housed.

[0077] like Figure 6 As shown, in a possible embodiment, the circuit board 3 is connected to the housing 71 by bolts.

[0078] The circuit board 3 can be connected to the shell 71 by bolts, and the bolts are made of conductive material. Specifically, the connection between the circuit board 3 and the shell 71 can realize the installation and fixation of the circuit board 3, which can improve the stability of the overall installation of the filter 6 inside the shell 71, and the circuit board 3 and the shell 1 are connected by bolts to realize the grounding of the circuit board 3.

[0079] The present application provides a filter 6, which includes a shell 1, a magnetic ring 2, a circuit board 3 and a capacitor assembly 4. The shell 1 includes a accommodating portion 11 and a main body 12. The magnetic ring 2 is installed in the accommodating portion 11. The capacitor assembly 4 is connected to the circuit board 3. The main body 12 has a side plate 121 close to the capacitor assembly 4. The side plate 121 is connected to the capacitor assembly 4. The filter 6 also includes a copper busbar 5. The copper busbar 5 is connected to the capacitor assembly 4 through the circuit board 3. By providing the side plate 121 connected to the capacitor assembly 4, the volume of the shell 1 can be reduced, the structure of the shell 1 can be simplified, and the production cost of the filter 6 can be reduced.

[0080] The above describes in detail the structure, features and effects of the present application based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present application, but the present application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of the present application, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present application.

Claims

1. A filter, characterized in that: The filter includes a shell, a magnetic ring, a circuit board and a capacitor assembly. The shell includes a accommodating portion and a main body. The accommodating portion has a cavity. The magnetic ring is installed in the accommodating portion. The capacitor assembly is connected to the circuit board. The main body has a side close to the capacitor assembly. The side of the main body is provided with a panel, which is connected to the capacitor assembly. The filter also includes a copper busbar, which is connected to the capacitor assembly through the circuit board. The magnetic ring is used to filter out electromagnetic interference in the copper busbar.

2. The filter according to claim 1, wherein The main body is provided with a plurality of the enclosure plates, and the enclosure plates are arranged along the circumference of the capacitor assembly.

3. The filter according to claim 1, wherein The length dimension of the enclosure is L1, the height dimension of the capacitor assembly is L2, and L1 and L2 satisfy 1 / 4≤L1 / L2≤1 / 2.

4. The filter according to claim 1, wherein The accommodating portion is located at the top of the main body along the third direction, the capacitor assembly is arranged at the bottom of the main body along the third direction, and the capacitor assembly and the magnetic ring are arranged along the third direction.

5. The filter according to claim 1, wherein Inserts are respectively provided at both ends of the main body, and the inserts are used to set connecting pieces to fix the main body.

6. The filter according to claim 5, characterized in that The outer wall of the insert is provided with a plurality of oblique lines, and the oblique lines are raised relative to the outer wall of the insert.

7. The filter according to claim 1, wherein The housing includes a reinforcing plate connecting the accommodating portion and the main body portion.

8. The filter according to claim 1, wherein The capacitor assembly is arranged on a side of the circuit board away from the shell along the third direction. The copper busbar includes a first connecting segment and a second connecting segment connected to each other. A preset angle is formed between the first connecting segment and the second connecting segment. At least a portion of the first connecting segment is located on the inner side of the first through hole of the magnetic ring, and the second connecting segment is connected to the shell.

9. The filter according to any one of claims 1 to 8, characterized in that The capacitor component includes at least two X capacitors, two first Y capacitors and two second Y capacitors.

10. A motor controller, characterized in that: The motor controller includes a housing and a filter. The filter is installed inside the housing. The filter is the filter according to any one of claims 1 to 9.

Images