Filter and motor controller

Abstract

The embodiment of the utility model discloses a filter and a motor controller. The filter comprises a first busbar and a first capacitor. The first busbar is provided with a first connecting part, and the size of the first connecting part in the first direction is the minimum size of the first connecting part. The first capacitor comprises a first capacitor body and a first pin, the first capacitor body is located on one side of the first connecting part in the second direction, and the size of the first capacitor body in the first direction is the minimum size of the first capacitor body. With the second direction as the projection direction, the projection of the first capacitor body and the projection of the first connecting part are at least partially overlapped. The first pin is connected to the first capacitor body and the first connecting part. In the embodiment of the invention, the first capacitor main body and the first connecting part are staggered in the first direction, and the size of the filter in the first direction can be further reduced at the first capacitor.

Description

Technical Field

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

[0002] The motor controller is a device that controls the energy transmission between the power supply and the motor. It is responsible for inverting the DC power from the battery into an accurately controllable AC power according to the control logic and outputting it to the motor, or inverting the AC power from the motor into an accurately controllable DC power according to the control logic and outputting it to the battery. The filter in the motor controller is used to filter the current. Specifically, the filter includes a busbar and a capacitor. The busbar is used to transmit current. The capacitor includes a capacitor body and a pin connecting the capacitor body to the busbar, and the capacitor body is used to filter the current.

[0003] In some application scenarios, it is necessary to minimize the size of the filter in a predetermined direction. In the prior art, the busbar is designed to be generally flat and perpendicular to the predetermined direction. The capacitor body is stacked on the busbar in the predetermined direction. When the capacitor body is in a cubic shape and the size of the capacitor body in the thickness direction is the smallest, the thickness direction of the capacitor body is consistent with the predetermined direction to minimize the overall size of the filter at the capacitor.

[0004] In the prior art, at the capacitor, the minimum size of the filter in a predetermined direction is the sum of the thickness of the busbar and the thickness of the capacitor body. Utility Model Content

[0005] Embodiments of the present application provide a filter and a motor controller, which reduce the size of the filter in a predetermined direction at at least one capacitor.

[0006] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0007] On the one hand, a filter is provided, which is applied to a motor controller, wherein the filter has a first direction and a second direction perpendicular to each other, and the filter includes a first busbar and a first capacitor. The first busbar is a conductive member, which is used to electrically connect the positive or negative pole of a power supply, and the first busbar has a first connecting portion, and the size of the first connecting portion in the first direction is the minimum size of the first connecting portion; the first capacitor includes a first capacitor body and a first pin, the first capacitor body is located on one side of the first connecting portion in the second direction, the size of the first capacitor body in the first direction is the minimum size of the first capacitor body, and the projection of the first capacitor body at least partially overlaps with the projection of the first connecting portion with the second direction as the projection direction, and the first pin is respectively connected to the first capacitor body and the first connecting portion.

[0008] In addition to or as an alternative to one or more features disclosed above, with the second direction being the projection direction, the projection of the first connecting portion is located within the projection of the first capacitor body.

[0009] In addition to or as an alternative to one or more features disclosed above, with the second direction being the projection direction, the projection of the first pin is located within the projection of the first capacitor body.

[0010] In addition to or as an alternative to one or more of the features disclosed above, the first connecting portion is in the shape of a flat plate perpendicular to the first direction, and the first pin is directly connected to a side surface of the first connecting portion in the first direction.

[0011] In addition to one or more features disclosed above, or as an alternative, the filter also includes a first grounding member, which is a conductive member for electrically connecting to the ground; wherein the first capacitor also includes a second pin, which is respectively connected to the first capacitor body and the first grounding member.

[0012] In addition to one or more of the features disclosed above, or as an alternative, the filter also has a third direction perpendicular to the first direction; the first grounding piece is located on one side of the first capacitor in the third direction; with the third direction as the projection direction, the projection of the first grounding piece is located within the projection of the first capacitor body.

[0013] In addition to one or more of the features disclosed above, or as an alternative, the filter also has a third direction perpendicular to the first direction; the first grounding piece is located on one side of the first capacitor body in the third direction; with the third direction as the projection direction, the projection of the second pin is located within the projection of the first capacitor body.

[0014] In addition to one or more features disclosed above, or as an alternative, the filter also includes a second busbar and a second capacitor. The second busbar is a conductive member, the first busbar is used to electrically connect one of the positive and negative electrodes of the power supply, the second busbar is used to electrically connect the other of the positive and negative electrodes of the power supply, the second busbar has a second connection portion, the size of the second connection portion in the first direction is the minimum size of the second connection portion, and the second connection portion and the first connection portion are arranged relative to each other in the first direction; the second capacitor includes a second capacitor body and a third pin, the size of the second capacitor body in the first direction is the minimum size of the second capacitor body, the first capacitor body and the second capacitor body are respectively located on opposite sides of the first connection portion in the second direction, the first capacitor body and the second capacitor body are respectively located on opposite sides of the second connection portion in the second direction, with the second direction as the projection direction, the projection of the first capacitor body and the projection of the second capacitor body at least partially overlap and form an overlapping area, and the projection of the first connection portion and the projection of the second connection portion are respectively located in the overlapping area.

[0015] In addition to one or more of the features disclosed above, or as an alternative, the filter also includes an insulating body. The insulating body forms a first accommodating groove and a second accommodating groove, and the first accommodating groove and the second accommodating groove are respectively located on opposite sides of the insulating body in the first direction; wherein the first connecting portion is embedded in the insulating body, the surface of the first connecting portion has a first connecting area, the first connecting area is exposed to the insulating body, the first connecting area and the first accommodating groove are located on the same side of the insulating body in the first direction, the first capacitor body is accommodated in the first accommodating groove, the first pin is connected to the first connecting area, the second connecting portion is embedded in the insulating body, the surface of the second connecting portion has a second connecting area, the second connecting area is exposed to the insulating body, the second connecting area and the second accommodating groove are located on the same side of the insulating body in the first direction, the second capacitor body is accommodated in the first accommodating groove, and the third pin is connected to the second connecting area.

[0016] In addition to one or more of the features disclosed above, or as an alternative, the filter also includes a first grounding member and a second grounding member. The first grounding member is a conductive member, used to electrically connect to the ground, the first grounding member is embedded in the insulating body, the surface of the first grounding member has a third connection area, the third connection area is exposed to the insulating body, and the third connection area and the first accommodating groove are located on the same side of the insulating body in the first direction; the second grounding member is a conductive member, used to electrically connect to the ground, the second grounding member is embedded in the insulating body, the surface of the second grounding member has a fourth connection area, the fourth connection area is exposed to the insulating body, and the fourth connection area and the second accommodating groove are located on the same side of the insulating body in the first direction; the first capacitor also includes a second pin, the second pin is respectively connected to the first capacitor body and the third connection area; the second capacitor also includes a fourth pin, the fourth pin is respectively connected to the second capacitor body and the fourth connection area; wherein the first capacitor and the second capacitor are exactly the same.

[0017] In addition to one or more of the features disclosed above, or as an alternative, the filter also includes a magnet and a third capacitor. The magnets are respectively mounted on the first busbar and the second busbar; the third capacitor includes a third capacitor body, a fifth pin and a sixth pin, the fifth pin is respectively connected to the third capacitor body and the first busbar, and the sixth pin is respectively connected to the third capacitor body and the second busbar; wherein the first busbar extends along a first predetermined path, the second busbar extends along a second predetermined path, and along the first predetermined path or the second predetermined path, the third capacitor body is located on one side of the magnet, and the first capacitor body and the second capacitor body are respectively located on the other side of the magnet.

[0018] On the other hand, the present application also provides a motor controller, which includes a filter, a DC bus capacitor and a power module. The filter is used to filter the DC power. The DC bus capacitor is electrically connected to the filter, and the DC bus capacitor is used to stabilize the DC power. The power module is electrically connected to the DC bus capacitor, and the power module is used to realize the mutual conversion between AC power and DC power. Among them, the filter is any of the above filters.

[0019] One of the above technical solutions has the following advantages or beneficial effects:

[0020] In the embodiment of the present application, the first capacitor body is arranged on one side of the first connecting portion of the first busbar in the second direction, so that the first capacitor body and the first connecting portion are staggered in the first direction (predetermined direction). At the first capacitor, the minimum size of the filter in the predetermined direction can be smaller than the sum of the thickness of the first busbar and the first capacitor body in the first direction. Compared with the prior art, at the first capacitor, the size of the filter in the first direction can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a motor controller of the present application;

[0023] Figure 2 yes Figure 1 The front view of the motor controller shown, omitting the main control circuit board and electromagnetic shielding components;

[0024] Figure 3 is a schematic diagram of a three-dimensional structure of a filter embodiment of the present application from a first viewing angle;

[0025] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of the filter from a second viewing angle;

[0026] Figure 5 yes Figure 3 A three-dimensional exploded view of the filter shown;

[0027] Figure 6 yes Figure 3 The three-dimensional structure diagram of the filter shown, omitting the insulating body;

[0028] Figure 7 yes Figure 3 A front view of the filter, omitting the insulating body;

[0029] Figure 8 yes Figure 3A side view of the filter from a first viewing angle, omitting the insulating body;

[0030] Fig. 9 yes Figure 3 A side view of the filter from a second viewing angle, omitting the insulating body;

[0031] Fig.10 yes Figure 7 Middle AA section view;

[0032] Fig.11 yes Figure 3 An enlarged view of a partial view;

[0033] Fig.12 yes Figure 4 Enlarged view of the partial view.

[0034] Explanation of reference numerals: 10-insulating body; 101-first accommodating groove; 102-second accommodating groove; 20-first busbar; 201-first connecting portion; 202-first connecting area; 30-second busbar; 301-second connecting portion; 302-second connecting area; 40-first grounding member; 401-third connecting area; 50-second grounding member; 501-fourth connecting area; 60-first capacitor; 601-first capacitor body; 602-first pin; 603-second pin; 604-first surface; 605-second surface; 70-second Capacitor; 701-second capacitor body; 702-third pin; 703-fourth pin; 704-third surface; 705-fourth surface; 80-magnet; 910-third capacitor; 911-third capacitor body; 912-fifth pin; 913-sixth pin; 920-first terminal; 930-second terminal; 1-housing; 2-DC connector; 3-filter; 4-DC bus capacitor; 5-power module; 6-electromagnetic shielding; 7-main control circuit board; 8-AC connector; 9-installation cavity; Z-first direction; Y-second direction. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and beneficial effects of this application clearer, the following further describes this application in detail in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining this application, not for limiting this application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0037] See also Figure 1 and Figure 2 . Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a motor controller of the present application. Figure 2 yes Figure 1 The front view of the motor controller shown omits the main control circuit board 7 and the electromagnetic shielding component 6.

[0038] The motor controller is a device that controls the energy transmission between the power supply and the motor. It is responsible for inverting the DC power from the battery into accurately controllable AC power according to the control logic and outputting it to the motor, or inverting the AC power from the motor into accurately controllable DC power according to the control logic and outputting it to the battery.

[0039] The motor controller includes a housing 1 , a DC connector 2 , a filter 3 , a DC bus capacitor 4 , a power module 5 , an electromagnetic shielding component 6 , a main control circuit board 7 , and an AC connector 8 .

[0040] The housing 1 is the main structure of the motor controller and is used to install other components of the motor controller. The housing 1 is surrounded to form an installation cavity 9.

[0041] The DC connector 2 is disposed on the housing 1 , with a portion thereof extending into the mounting cavity 9 to be electrically connected to the filter 3 , and another portion thereof being located outside the mounting cavity 9 to be electrically connected to the battery.

[0042] The filter 3 is accommodated in the mounting cavity 9 and is used for filtering direct current.

[0043] The power module 5 is located in the mounting cavity 9. The power module 5 is also an IGBT (Insulated Gate Bipolar Transistor) power module. The power module 5 is electrically connected to the DC bus capacitor 4, and the power module 5 is used to realize the mutual conversion between AC and DC. In some embodiments, the power module 5 includes a single-tube power device, such as a triode.

[0044] The AC connector 8 is disposed in the housing 1 , with a portion thereof extending into the mounting cavity 9 to be electrically connected to the power module 5 , and another portion thereof being located outside the mounting cavity 9 to be electrically connected to the motor.

[0045] The main control circuit board 7 is located in the installation cavity 9. The main control circuit board 7 is electrically connected to the power module 5, and the main control circuit board 7 is used to control the power module 5 to convert AC power and DC power. In some embodiments, the main control circuit board 7 includes a PCB board and an MCU (Microcontroller Unit) disposed on the PCB board. The MCU outputs a control signal to control the conduction and shutdown of each single-tube power device.

[0046] A portion of the main control circuit board 7 is stacked on one side of the power module 5 on the Z axis, and another portion of the main control circuit board 7 is stacked on one side of the filter 3 on the Z axis.

[0047] The electromagnetic shielding member 6 is sandwiched between the filter 3 and the main control circuit board 7 on the Z axis to reduce the electromagnetic interference of the filter 3 on the main control circuit board 7 .

[0048] The motor controller of the present application is in a flat shape to minimize the size of the motor controller on the Z axis. The filter 3 of the present application is applied to the above-mentioned motor controller, but is not limited to the above-mentioned motor controller. Correspondingly, the filter 3 of the present application is in a flat shape to minimize the size of the filter 3 on the Z axis.

[0049] See also Figures 3 to 6 . Figure 3 and Figure 4 They are schematic diagrams of the three-dimensional structure of an embodiment of the filter 3 of the present application from different perspectives. Figure 5 yes Figure 1 A three-dimensional exploded view of the filter 3 is shown. Figure 6 yes Figure 1 The three-dimensional structure diagram of the filter 3 is shown, omitting the insulating body 10. The first direction in the following text is the Z axis, and the second direction is the Y axis.

[0050] The filter 3 includes an insulating body 10 , a first busbar 20 , a second busbar 30 , a first grounding member 40 , a second grounding member 50 , a first capacitor 60 , a second capacitor 70 , a third capacitor 910 , a magnet 80 , a first terminal 920 , and a second terminal 930 .

[0051] The insulating body 10 is the structural main body of the filter 3, and is used to install the remaining components of the filter 3. Specifically, the first busbar 20, the second busbar 30, the first grounding member 40, the second grounding member 50, the first terminal 920, and the second terminal 930 are respectively integrally formed with the insulating body 10, for example, integrally formed by injection molding. The material of the insulating body 10 is, for example, plastic. In other embodiments, the remaining components may be assembled to the insulating body 10 without being integrally formed. For example, the insulating body 10 is pre-formed with a cavity, and the first busbar 20, the second busbar 30, the first grounding member 40, the second grounding member 50, the first terminal 920, and the second terminal 930 are respectively accommodated in the cavity of the insulating body 10 and fixedly connected to the insulating body 10.

[0052] The first busbar 20 is a conductive member for electrically connecting the positive electrode of the power supply and one of the negative electrodes of the power supply. The material of the first busbar 20 can be copper or copper alloy. Specifically, the first busbar 20 extends along the first predetermined path. The first busbar 20 is a flat structure perpendicular to the Z axis. A first terminal 920 is connected to one end of the first busbar 20 on the extension path, and another first terminal 920 is connected to the other end of the first busbar 20 on the extension path. The first terminal 920 has a threaded hole for easy connection. The pin of the DC bus capacitor 4 is connected to a first terminal 920, so that the DC bus capacitor 4 is electrically connected to the first busbar 20. The pin of the DC connector 2 is connected to another first terminal 920, so that the DC connector 2 is electrically connected to the first busbar 20.

[0053] The second busbar 30 is a conductive member, and the second busbar 30 is used to electrically connect the positive electrode of the power supply and the other of the negative electrodes of the power supply. The material of the second busbar 30 can be copper or copper alloy. Specifically, the second busbar 30 extends along the second predetermined path. A second terminal 930 is connected to one end of the second busbar 30 on the extension path, and another second terminal 930 is connected to the other end of the second busbar 30 on the extension path. The second terminal 930 has a threaded hole for easy connection. The pin of the DC bus capacitor 4 is connected to a second terminal 930, so that the DC bus capacitor 4 is electrically connected to the second busbar 30. The pin of the DC connector 2 is connected to another second terminal 930, so that the DC connector 2 is electrically connected to the second busbar 30.

[0054] The power source is a motor or a battery. In the scenario where the motor controller converts AC power into DC power, the power source is a motor. In the scenario where the motor controller converts DC power into AC power, the power source is a battery.

[0055] The first grounding member 40 is a conductive member for electrically connecting to the ground.

[0056] The second grounding member 50 is a conductive member for electrically connecting to the ground.

[0057] The first capacitor 60 is a Y capacitor. The first capacitor body 601 is used to filter the common mode interference. The first capacitor 60 includes a first capacitor body 601, a first pin 602 and a second pin 603. The first pin 602 is connected to the first capacitor body 601 and the first busbar 20 respectively. The second pin 603 is connected to the first capacitor body 601 and the first grounding member 40 respectively. The first capacitor body 601 is electrically connected to the first busbar 20 through the first pin 602, and the first capacitor body 601 is electrically connected to the first grounding member 40 through the second pin 603.

[0058] The second capacitor 70 is a Y capacitor. The second capacitor body 701 is used for filtering common mode interference. The second capacitor 70 includes a second capacitor body 701, a third pin 702 and a fourth pin 703. The third pin 702 is connected to the second capacitor body 701 and the second busbar 30 respectively. The fourth pin 703 is connected to the second capacitor body 701 and the second grounding member 50 respectively. The second capacitor body 701 is electrically connected to the second busbar 30 through the third pin 702, and the second capacitor body 701 is electrically connected to the second grounding member 50 through the fourth pin 703.

[0059] The magnet 80 is respectively sleeved on the first busbar 20 and the second busbar 30. Specifically, the magnet 80 includes two parts, each of which is in a semicircular ring shape. The two parts are arranged to form a circular ring. In the motor controller, the electromagnetic shielding plate cooperates with the shell 1 to clamp the magnet 80 along the Z axis, thereby fixing the position of the magnet 80. In other embodiments, the magnet 80 can also be bonded to the insulating body 10 by glue to fix the position of the magnet 80.

[0060] The third capacitor 910 is an X capacitor. The third capacitor body 911 is used to filter the differential mode interference. The third capacitor 910 includes a third capacitor body 911, a fifth pin 912 and a sixth pin 913. The fifth pin 912 is respectively connected to the third capacitor body 911 and the first busbar 20, and the sixth pin 913 is respectively connected to the third capacitor body 911 and the second busbar 30. The third capacitor body 911 is electrically connected to the first busbar 20 through the fifth pin 912, and the third capacitor body 911 is electrically connected to the second busbar 30 through the sixth pin 913.

[0061] Along the first predetermined path or the second predetermined path, the third capacitor body 911 is located on one side of the magnet 80 , and the first capacitor body 601 and the second capacitor body 701 are respectively located on the other side of the magnet 80 .

[0062] The first capacitor 60 and the second capacitor 70 are arranged at the filter 3 corresponding to the main control circuit board 7. Hereinafter, by improving the relative position relationship between the first capacitor 60 and the first busbar 20, and improving the relative position relationship between the second capacitor 70 and the second busbar 30, the size of the filter 3 along the Z axis at the first capacitor 60 and the second capacitor 70 is reduced, thereby reducing the overall size of the filter 3 along the Z axis after being stacked with the main control circuit board 7. This is described in detail below.

[0063] See also Figures 7 to 10 . Figure 7 yes Figure 3 A front view of the filter 3 is shown. Figure 8 yes Figure 3 A side view of the filter 3 is shown from a first viewing angle. Fig. 9 yes Figure 3 A side view of the filter 3 is shown from a second perspective. Fig.10 yes Figure 7 Middle AA section view. Figures 7 to 10 The insulating body 10 is omitted in the figure. In order to show the boundaries of each component, the gap between the pin and the busbar is enlarged.

[0064] The specific structure of the filter 3 at the first capacitor 60 is described in detail below.

[0065] The first busbar 20 has a first connection portion 201. The dimension of the first connection portion 201 in the first direction Z is the minimum dimension of the first connection portion 201. The first capacitor body 601 is located on one side of the first connection portion 201 in the second direction Y. The dimension of the first capacitor body 601 in the first direction Z is the minimum dimension of the first capacitor body 601. With the second direction Y as the projection direction, the projection of the first capacitor body 601 at least partially overlaps with the projection of the first connection portion 201. The first pin 602 is connected to the first capacitor body 601 and the first connection portion 201, respectively.

[0066] In the figure, the approximate area of ​​the first connecting portion 201 is indicated by a dotted frame.

[0067] Specifically, the first connection portion 201 is substantially in the shape of a plate and has a thickness dimension T. The thickness dimension T of the first connection portion 201 is the minimum dimension of the first connection portion 201. The first busbar 20 is arranged such that the first connection portion 201 is perpendicular to the first direction Z and extends outward in a plane perpendicular to the first direction Z.

[0068] Specifically, the first capacitor body 601 is substantially in the shape of a cube, having a length dimension L1, a width dimension L2, and a thickness dimension L3, wherein the thickness dimension L3 of the first capacitor body 601 is the minimum dimension of the first capacitor body 601. The first capacitor body 601 is arranged in a posture such that the dimension of the first capacitor body 601 in the first direction Z is the thickness dimension L3. In other embodiments, when the first capacitor body 601 is cylindrical, if the axial dimension of the first capacitor body 601 is smaller than the outer diameter of the first capacitor body 601, the first capacitor body 601 is arranged in a posture such that the axial direction of the first capacitor body 601 is parallel to the first direction Z.

[0069] In the prior art, at the first capacitor 60, the first capacitor 60 and the first busbar 20 are stacked in the first direction Z, and the minimum size of the filter 3 in the first direction Z is the sum of the thickness dimension T of the first busbar 20 and the thickness dimension L3 of the first capacitor body 601. In the embodiment of the present application, the first capacitor body 601 is arranged on one side of the first connecting portion 201 of the first busbar 20 in the second direction Y, so that the first capacitor body 601 and the first connecting portion 201 are staggered in the first direction Z. At the first capacitor 60, the minimum size of the filter 3 in the first direction Z can be smaller than the sum of the thickness dimension T of the first busbar 20 and the thickness dimension L3 of the first capacitor body 601. Compared with the prior art, at the first capacitor 60, the size of the filter 3 in the first direction Z can be further reduced.

[0070] Further, taking the second direction Y as the projection direction, the projection of the first connection portion 201 is located within the projection of the first capacitor body 601. Specifically, the first capacitor body 601 has a first surface 604 and a second surface 605 that are disposed opposite to each other in the first direction Z. In the first direction Z, the first connection portion 201 does not protrude from the first surface 604 and the second surface 605, respectively.

[0071] At the first capacitor 60 , the minimum size of the filter 3 in the first direction Z can be the thickness L3 of the first capacitor body 601 , thereby further reducing the size of the filter 3 in the first direction Z.

[0072] The first capacitor body 601 is connected to the first connection portion 201 and electrically connected via the first pin 602, and the first pin 602 may also affect the size of the filter 3 in the first direction Z. In the embodiment of the present application, with the second direction Y as the projection direction, the projection of the first pin 602 is located within the projection of the first capacitor body 601. Specifically, in the first direction Z, the first pin 602 does not protrude from the first surface 604 and the second surface 605, respectively.

[0073] In the prior art, the first busbar 20 includes a main body and a flange portion. The main body is flat and perpendicular to the first direction Z. The flange portion is folded from the edge of the main body toward one side of the first direction Z. A notch is provided on the edge of the flange portion away from the main body to clamp the first pin 602. The first pin 602 is connected to the flange portion and is electrically conductive. In the prior art, the connection method of the first pin 602 and the first busbar 20 is not conducive to reducing the size of the filter 3 in the first direction Z.

[0074] In the embodiment of the present application, the first connection portion 201 is in the shape of a plate perpendicular to the first direction Z, and the first pin 602 is directly connected to a side surface of the first connection portion 201 in the first direction Z. Specifically, the first pin 602 is connected to the first connection portion 201 by laser welding. In this way, compared with the prior art, it is helpful to reduce the size of the filter 3 in the first direction Z.

[0075] The filter 3 also has a third direction F1 perpendicular to the first direction Z. The first grounding member 40 is located on one side of the first capacitor body 601 in the third direction F1. With the third direction F1 as the projection direction, the projection of the first grounding member 40 is located within the projection of the first capacitor body 601, and the projection of the second pin 603 is located within the projection of the first capacitor body 601. Specifically, the third direction F1 intersects with the X-axis and the Y-axis respectively. In other embodiments, the third direction F1 may also be parallel to the X-axis or the Y-axis.

[0076] Specifically, the first grounding member 40 is substantially in the shape of a plate perpendicular to the first direction Z, and the second pin 603 is directly connected to a side surface of the first grounding member 40 in the first direction Z. In the first direction Z, the first grounding member 40 does not protrude from the first surface 604 and the second surface 605, respectively, and the second pin 603 does not protrude from the first surface 604 and the second surface 605, respectively.

[0077] Such an arrangement can reduce the influence of the first grounding member 40 and the second pin 603 on the size of the filter 3 in the first direction Z.

[0078] The following specifically describes the specific structure of the filter 3 at the second capacitor 70. The connection structure of the second capacitor 70 is similar to the connection structure of the first capacitor 60. For the connection structure of the second capacitor 70 not described, please refer to the connection structure of the first capacitor 60.

[0079] The second busbar 30 has a second connection portion 301, and the size of the second connection portion 301 in the first direction Z is the minimum size of the second connection portion 301. Specifically, the second connection portion 301 is substantially in the shape of a plate. Among them, the thickness of the second connection portion 301 is the minimum size of the first connection portion 201. The placement posture of the second busbar 30 is configured such that the second connection portion 301 is perpendicular to the first direction Z, and the second connection portion 301 extends outward in a plane perpendicular to the first direction Z.

[0080] The size of the second capacitor body 701 in the first direction Z is the minimum size of the second capacitor body 701. The second capacitor body 701 is located on one side of the second connecting portion 301 in the second direction Y. With the second direction Y as the projection direction, the projection of the second capacitor body 701 overlaps with the projection of the second connecting portion 301 at least partially. The second pin 603 is respectively connected to the second capacitor body 701 and the second connecting portion 301. Specifically, the second capacitor body 701 is substantially in the shape of a cube. The placement posture of the second capacitor body 701 is configured such that the size of the second capacitor body 701 in the first direction Z is the thickness size.

[0081] Further, with the second direction Y as the projection direction, the projection of the second connection portion 301 is located within the projection of the second capacitor body 701, and the projection of the third pin 702 is located within the projection of the second capacitor body 701. Specifically, the second capacitor body 701 has a third surface 704 and a fourth surface 705 that are arranged opposite to each other in the first direction Z. In the first direction Z, the second connection portion 301 does not protrude from the third surface 704 and the fourth surface 705, respectively, and the third pin 702 does not protrude from the first surface 604 and the second surface 605, respectively.

[0082] The second grounding member 50 is located at one side of the second capacitor body 701 in the fourth direction F2. Taking the fourth direction F2 as the projection direction, the projection of the second grounding member 50 is located within the projection of the second capacitor body 701, and the projection of the fourth pin 703 is located within the projection of the second capacitor body 701.

[0083] Specifically, the fourth direction F2 intersects the X-axis and the Y-axis respectively. In other embodiments, the fourth direction F2 may also be parallel to the X-axis or the Y-axis.

[0084] Specifically, the second grounding member 50 is substantially in the shape of a plate perpendicular to the first direction Z, and the fourth pin 703 is directly connected to a side surface of the second grounding member 50 in the first direction Z. In the first direction Z, the second grounding member 50 does not protrude from the third surface 704 and the fourth surface 705, respectively, and the fourth pin 703 does not protrude from the third surface 704 and the fourth surface 705, respectively.

[0085] In order to make the structure of the filter 3 more compact at the locations corresponding to the first capacitor 60 and the second capacitor 70, the size of the filter 3 on the Z axis is compressed and the space occupied by the filter 3 in the plane perpendicular to the Z axis is reduced through reasonable layout. The details are as follows.

[0086] The second connection part 301 and the first connection part 201 are arranged opposite to each other in the first direction Z. The first capacitor body 601 and the second capacitor body 701 are respectively located on opposite sides of the first connection part 201 in the second direction Y. The first capacitor body 601 and the second capacitor body 701 are respectively located on opposite sides of the second connection part 301 in the second direction Y. With the second direction Y as the projection direction, the projection of the first capacitor body 601 and the projection of the second capacitor body 701 at least partially overlap and form an overlapping area, and the projection of the first connection part 201 and the projection of the second connection part 301 are respectively located in the overlapping area.

[0087] That is, in the first direction Z, the first connection portion 201 does not protrude from the second surface 605 and the third surface 704 , and the second connection portion 301 does not protrude from the second surface 605 and the third surface 704 .

[0088] In addition, in the first direction Z, the first grounding member 40 does not protrude from the second surface 605 and the third surface 704 , and the second grounding member 50 does not protrude from the second surface 605 and the third surface 704 .

[0089] The first capacitor body 601 and the second capacitor body 701 are arranged at intervals in the second direction Y, and the first busbar 20 and the second busbar 30 respectively pass through the gap between the first capacitor body 601 and the second capacitor body 701 in the second direction Y, and overlap at least at the corresponding gap, compared with the case where the first connection part 201 and the second connection part 301 are not overlapped, the space occupied by the filter 3 in the plane perpendicular to the Z axis can be reduced. The first connection part 201 and the second connection part 301 are respectively located in the dislocation space formed by the first capacitor body 601 and the second capacitor body 701 in the first direction Z, so that the structure of the filter 3 is more compact.

[0090] See also Figure 3 , 4 , 11 and Fig.12 . Fig.11 yes Figure 3 Enlarged view of the partial view. Fig.12 yes Figure 4 Enlarged view of the partial view.

[0091] The insulating body 10 forms a first accommodating groove 101 and a second accommodating groove 102 . The first accommodating groove 101 and the second accommodating groove 102 are respectively located at two opposite sides of the insulating body 10 in the first direction Z.

[0092] The first connection portion 201 is embedded in the insulating body 10, and the surface of the first connection portion 201 has a first connection area 202, and the first connection area 202 is exposed to the insulating body 10. The first grounding member 40 is embedded in the insulating body 10, and the surface of the first grounding member 40 has a third connection area 401, and the third connection area 401 is exposed to the insulating body 10. The first connection area 202, the third connection area 401 and the first receiving groove 101 are located on the same side of the insulating body 10 in the first direction Z.

[0093] The first capacitor body 601 is accommodated in the first accommodation groove 101 , the first pin 602 is connected to the first connection area 202 , and the second pin 603 is connected to the third connection area 401 .

[0094] The second connection portion 301 is embedded in the insulating body 10, and the surface of the second connection portion 301 has a second connection area 302, and the second connection area 302 is exposed to the insulating body 10. The second grounding member 50 is embedded in the insulating body 10, and the surface of the second grounding member 50 has a fourth connection area 501, and the fourth connection area 501 is exposed to the insulating body 10. The fourth connection area 501, the second connection area 302, and the second accommodating groove 102 are located on the same side of the insulating body 10 in the first direction Z.

[0095] The second capacitor body 701 is accommodated in the first accommodation groove 101 , the third pin 702 is connected to the second connection area 302 , and the fourth pin 703 is connected to the fourth connection area 501 .

[0096] The first capacitor 60 and the second capacitor 70 are completely identical. Specifically, the first capacitor 60 and the second capacitor 70 have the same specifications and sizes, and the two can be interchangeable.

[0097] When assembling the filter 3, the following steps are included:

[0098] After placing the first capacitor body 601 in the first receiving groove 101, the first pin 602 is connected to the first connection area 202, and the second pin 603 is connected to the third connection area 401; after placing the second capacitor body 701 in the second receiving groove 102, the third pin 702 is connected to the second connection area 302, and the fourth pin 703 is connected to the fourth connection area 501.

[0099] In the embodiment of the present application, the first capacitor 60 and the second capacitor 70 are exactly the same. On the one hand, the first capacitor 60 and the second capacitor 70 can be manufactured using the same process, saving processing costs. On the other hand, when assembling the filter 3, there is no need to distinguish between the first capacitor 60 and the second capacitor 70, thereby improving assembly efficiency.

[0100] In the above embodiment, by improving the relative positional relationship between the first capacitor 60 and the first busbar 20, and improving the relative positional relationship between the second capacitor 70 and the second busbar 30, the size of the filter 3 along the Z axis at the first capacitor 60 and the second capacitor 70 is reduced, thereby reducing the size of the filter 3 along the Z axis after being stacked with the main control circuit board 7. Wherein, the first capacitor 60 and the second capacitor 70 are both Y capacitors. In some other embodiments, the first capacitor 60 may also be an X capacitor, or the second capacitor 70 may be an X capacitor. In the case where the first capacitor 60 is an X capacitor, the second pin 603 is respectively connected to the second busbar 30 and the first capacitor body 601. In the case where the second capacitor 70 is an X capacitor, the fourth pin 703 is respectively connected to the first busbar 20 and the second capacitor body 701.

[0101] In summary, the filter and motor controller of the present application can reduce the size of the filter in a predetermined direction at at least one capacitor.

[0102] The introduction provided in the above steps is only used to help understand the method, structure and core idea of ​​the present application. For ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A filter, applied to a motor controller, wherein the filter has a first direction and a second direction perpendicular to each other, characterized in that: The filter comprises: A first busbar, wherein the first busbar is a conductive member and is used to electrically connect a positive electrode or a negative electrode of a power source, wherein the first busbar has a first connecting portion, and a dimension of the first connecting portion in the first direction is a minimum dimension of the first connecting portion; A first capacitor, the first capacitor includes a first capacitor body and a first pin, the first capacitor body is located on one side of the first connecting portion in the second direction, the size of the first capacitor body in the first direction is the minimum size of the first capacitor body, and with the second direction as the projection direction, the projection of the first capacitor body at least partially overlaps with the projection of the first connecting portion, and the first pin is respectively connected to the first capacitor body and the first connecting portion.

2. The filter according to claim 1, characterized in that: Taking the second direction as the projection direction, the projection of the first connecting portion is located within the projection of the first capacitor body, and / or Taking the second direction as the projection direction, the projection of the first pin is located within the projection of the first capacitor body.

3. The filter according to claim 1, characterized in that: The first connecting portion is in the shape of a plate perpendicular to the first direction, and the first pin is directly connected to a surface of one side of the first connecting portion in the first direction.

4. The filter according to claim 1, characterized in that: Also includes: A first grounding member, wherein the first grounding member is a conductive member and is used for electrically connecting to the ground; Wherein, the first capacitor further includes a second pin, and the second pin is respectively connected to the first capacitor body and the first grounding member.

5. The filter according to claim 4, characterized in that: The filter also has a third direction perpendicular to the first direction; The first grounding member is located at one side of the first capacitor body in the third direction; Taking the third direction as the projection direction, the projection of the first grounding member is located within the projection of the first capacitor body, and / or Taking the third direction as the projection direction, the projection of the second pin is located within the projection of the first capacitor body.

6. The filter according to claim 1, characterized in that: Also includes: a second busbar, the second busbar being a conductive member, the first busbar being used to electrically connect one of the positive electrode and the negative electrode of a power source, the second busbar being used to electrically connect the other of the positive electrode and the negative electrode of the power source, the second busbar having a second connecting portion, the dimension of the second connecting portion in the first direction being the minimum dimension of the second connecting portion, the second connecting portion and the first connecting portion being arranged opposite to each other in the first direction; A second capacitor, the second capacitor includes a second capacitor body and a third pin, the size of the second capacitor body in the first direction is the minimum size of the second capacitor body, the first capacitor body and the second capacitor body are respectively located on opposite sides of the first connecting portion in the second direction, the first capacitor body and the second capacitor body are respectively located on opposite sides of the second connecting portion in the second direction, with the second direction as the projection direction, the projection of the first capacitor body and the projection of the second capacitor body at least partially overlap and form an overlapping area, and the projection of the first connecting portion and the projection of the second connecting portion are respectively located in the overlapping area.

7. The filter according to claim 6, characterized in that: Also includes: An insulating body, wherein the insulating body forms a first accommodating groove and a second accommodating groove, wherein the first accommodating groove and the second accommodating groove are respectively located at two opposite sides of the insulating body in the first direction; Among them, the first connecting part is embedded in the insulating body, the surface of the first connecting part has a first connecting area, the first connecting area is exposed from the insulating body, the first connecting area and the first accommodating groove are located on the same side of the insulating body in the first direction, the first capacitor body is accommodated in the first accommodating groove, the first pin is connected to the first connecting area, the second connecting part is embedded in the insulating body, the surface of the second connecting part has a second connecting area, the second connecting area is exposed from the insulating body, the second connecting area and the second accommodating groove are located on the same side of the insulating body in the first direction, the second capacitor body is accommodated in the first accommodating groove, and the third pin is connected to the second connecting area.

8. The filter according to claim 7, characterized in that: Also includes: A first grounding member, which is a conductive member and is used to electrically connect to the ground. The first grounding member is embedded in the insulating body. The surface of the first grounding member has a third connection area, which is exposed from the insulating body. The third connection area and the first accommodating groove are located on the same side of the insulating body in the first direction. A second grounding member, the second grounding member is a conductive member, used for electrically connecting to the ground, the second grounding member is embedded in the insulating body, the surface of the second grounding member has a fourth connection area, the fourth connection area is exposed from the insulating body, and the fourth connection area and the second containing groove are located on the same side of the insulating body in the first direction; The first capacitor further includes a second pin, and the second pin is respectively connected to the first capacitor body and the third connection area; The second capacitor further includes a fourth pin, and the fourth pin is respectively connected to the second capacitor body and the fourth connection area; The first capacitor and the second capacitor are completely the same.

9. The filter according to claim 7, characterized in that: Also includes: Magnets, the magnets are respectively sleeved on the first busbar and the second busbar; A third capacitor, the third capacitor comprising a third capacitor body, a fifth pin and a sixth pin, the fifth pin being connected to the third capacitor body and the first busbar respectively, and the sixth pin being connected to the third capacitor body and the second busbar respectively; Among them, the first busbar extends along a first predetermined path, the second busbar extends along a second predetermined path, along the first predetermined path or the second predetermined path, the third capacitor body is located on one side of the magnet, and the first capacitor body and the second capacitor body are respectively located on the other side of the magnet.

10. A motor controller, characterized in that: include: Filter, used to filter direct current; A DC bus capacitor is electrically connected to the filter, and the DC bus capacitor is used to stabilize the DC power; A power module, electrically connected to the DC bus capacitor, the power module being used to realize mutual conversion between AC power and DC power; Wherein, the filter is any one of the filters described in claims 1 to 9.

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