Filter assembly, inverter, motor drive system, and vehicle

Abstract

The embodiment of the application provides a filter assembly, an inverter, a motor driving system and a vehicle. The filter assembly comprises N AC metal arrays, a boosting metal array and a magnetic ring; at least part of the N AC metal arrays is arranged in a stacked mode, and N is an integer greater than 1; the boosting metal array is arranged on one side of the N AC metal arrays; and the magnetic ring is arranged around the N AC metal arrays and the boosting metal array, and the N AC metal arrays and the boosting metal array are spaced apart and located in the magnetic ring oppositely.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to international patent application PCT / CN2022 / 110584, filed on August 5, 2022, entitled “Filter component, inverter, motor drive system and vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of filtering technology, and in particular to a filtering component, an inverter, a motor drive system and a vehicle. Background Art

[0004] With the rapid development of motor drive systems, their voltage levels are gradually increasing. In order to meet the charging needs of high-voltage battery packs, a relay is usually added, and the motor winding is used as a boost inductor and inverter switching module to integrate the DC boost function into the motor drive system, so that the motor drive system has two modes: driving and boost charging.

[0005] However, the structure of the filter assembly in related art often fails to meet the filtering requirements of both the drive mode and the boost charging mode of the motor drive system. This can easily cause the magnetic ring in the filter assembly to saturate and heat, leading to filtering failure. Therefore, the filter assembly in related art suffers from the drawback of poor filtering effect. Summary of the Invention

[0006] The embodiments of the present application provide a filter component, an inverter, a motor drive system and a vehicle to solve the technical problem that the filter component has a defect of poor filtering effect.

[0007] In a first aspect, an embodiment of the present application provides a filter component, comprising:

[0008] N AC metal bars, at least some of which are stacked, where N is an integer greater than 1;

[0009] The boost metal busbar is arranged on one side of the N AC metal buses;

[0010] The magnetic ring is arranged around the N AC metal bars and the boost metal bar. The N AC metal bars and the boost metal bar are spaced apart and relatively located inside the magnetic ring.

[0011] In an embodiment of the present application, N AC metal bars are stacked, and the boost metal bar is arranged on one side of the N AC metal bars. The N AC metal bars and the boost metal bar can be simultaneously surrounded by a magnetic ring, and are respectively located in opposite and spaced positions within the magnetic ring, making the structural integration rate of the entire filter assembly higher. In this way, in the driving mode, the boost metal bar is not working, and the N AC metal bars flow through the AC current. At this time, due to the highly integrated structure of the filter assembly, the magnetic fields generated by the AC current flowing through the N AC metal bars cancel each other out, thereby improving the problem of local saturation heating caused by uneven distribution of the magnetic ring, which leads to filtering failure. In the boost charging mode, the boost current flows through the boost metal bar and the N AC metal bars. At this time, the magnetic fields generated by the currents of the boost metal bar and the N AC metal bars are canceled out within the magnetic ring, so the magnetic ring does not experience saturation heating, which leads to filtering failure. Therefore, the filter assembly can meet the filtering requirements in both modes and has a better filtering effect.

[0012] Optionally, in some embodiments, the orthographic projections of any two AC metal bars among the N AC metal bars along the stacking direction coincide with each other.

[0013] In this way, the integration level of the N AC metal bars can be further improved, thereby further improving the problem of local saturation heating caused by uneven distribution of magnetic rings in the driving mode, which in turn causes filtering failure.

[0014] Optionally, in some embodiments, the filtering component further includes:

[0015] The magnetic core center column is arranged in the magnetic ring and located between the N AC metal bars and the boost metal bar. An air gap is provided in the magnetic ring, and the air gap connects the N AC metal bars and the boost metal bar.

[0016] In this embodiment, the presence of the air gap can provide differential-mode inductance in the boost charging mode, and the differential-mode inductance can suppress differential-mode noise generated in the boost charging mode, thereby further improving the filtering effect of the filter component.

[0017] Optionally, in some embodiments, the center column of the magnetic core is connected to the inner wall of the magnetic ring.

[0018] In this embodiment, the core center column can be connected to the inner wall of the magnetic ring between the N AC metal bars and the boost metal bar, and spaced apart from the inner wall opposite to the connection to form an air gap, thereby achieving the purpose of providing differential mode inductance.

[0019] Optionally, in some embodiments, the magnetic core center column includes:

[0020] The first part is connected to the inner wall of the magnetic ring;

[0021] The second part is connected to the inner wall of the magnetic ring. The first part and the second part are spaced apart along a direction perpendicular to the N AC metal bars and toward the boost metal bar.

[0022] In this embodiment, the core center column may include a first part and a second part both connected to the inner wall of the magnetic ring and spaced apart, so that an air gap may be formed between the first part and the second part, thereby achieving the purpose of providing differential mode inductance.

[0023] Optionally, in some embodiments, the first portion and the second portion are arranged opposite each other. In this way, the size of the air gap can be adjusted more accurately, so that the differential mode inductor can better meet actual needs and further improve the filtering effect of the filtering component.

[0024] Optionally, in some embodiments, the center column of the magnetic core is spaced apart from the inner wall of the magnetic ring.

[0025] In this embodiment, the core column and the magnetic ring are independent of each other, and at least two air gaps can be formed between the core column and the inner wall of the magnetic ring. When the maximum power in the boost charging mode remains the same, the number of air gaps increases and the size of a single air gap decreases. Accordingly, the edge effect of the magnetic field generated by the air gap magnetic potential can be weakened as the air gap size decreases, and the eddy current loss of the N AC metal bars and the boost metal bar can be reduced as the edge effect is weakened.

[0026] Optionally, in some embodiments, the number of the core legs is M, and the M core legs are spaced apart in a direction perpendicular to the N AC metal bars toward the boost metal bar, where M is an integer greater than 1.

[0027] In this embodiment, the M core legs can further increase the number of air gaps, thereby further reducing the size of a single air gap, weakening the edge effect of the magnetic field, and further reducing the eddy current losses of the N AC metal bars and the boost metal bar.

[0028] Optionally, in some embodiments, the boost metal bar and the N AC metal bars are all arranged along the first direction;

[0029] Alternatively, the boost metal busbar and the N AC metal busbars are all arranged along the second direction;

[0030] Alternatively, one of the boost metal busbar and the N AC metal busbars is arranged along the first direction, and the other is arranged along the second direction;

[0031] The first direction is perpendicular to the direction of the N AC metal bars toward the boost metal bar, and the second direction is parallel to the direction of the N AC metal bars toward the boost metal bar.

[0032] In this embodiment, the direction and position of the boost metal bus and the N AC metal bus bars can be adjusted according to the actual layout and space of the motor drive system, so that the structure of the filter component is no longer constrained by the position of the metal bus bar, and the filter component has a higher degree of freedom.

[0033] Optionally, in some embodiments, the cross-section of the magnetic ring is rectangular, circular, or elliptical.

[0034] In this embodiment, the shape of the magnetic ring can also be selected according to actual needs, further improving the degree of freedom of the filter component.

[0035] In a second aspect, an embodiment of the present application further provides an inverter comprising the filter component of the first aspect.

[0036] In the embodiment of the present application, since the inverter adopts the above-mentioned filter component structure, the problem of filtering failure caused by saturation heating of the magnetic ring can be improved whether in the driving mode or in the boost charging mode, that is, the inverter can meet the filtering requirements in both modes and have a better filtering effect.

[0037] In a third aspect, an embodiment of the present application further provides a motor drive system, comprising the inverter of the second aspect.

[0038] In the embodiment of the present application, when the motor drive system is in the driving mode or the boost charging mode, the magnetic ring will not cause filtering failure due to saturation heat, so that the filtering effect of the motor drive system is better and the reliability is higher.

[0039] In a third aspect, an embodiment of the present application further provides a vehicle, comprising the motor drive system according to the third aspect.

[0040] In the embodiment of the present application, since the motor drive system has better filtering effect and higher reliability, the driving comfort of the vehicle can be improved, and the safety of vehicle charging can be improved.

[0041] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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 of the present application. 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 the drawings without creative work.

[0043] Figure 1A schematic structural diagram of a filter assembly provided in an embodiment of the present application;

[0044] Figure 2 A schematic structural diagram of N AC metal bars in a filter assembly provided in an embodiment of the present application;

[0045] Figure 3 Another structural diagram of N AC metal bars in the filter assembly provided in an embodiment of the present application;

[0046] Figure 4 Another structural schematic diagram of the filter assembly provided in an embodiment of the present application;

[0047] Figure 5 for Figure 4 Another structural diagram of the middle column of the middle magnetic core;

[0048] Figure 6 A schematic diagram of another structure of the filter assembly provided in an embodiment of the present application;

[0049] Figure 7a This is one of the schematic diagrams of the arrangement of N AC metal bars and boost metal bars in the filter assembly provided in an embodiment of the present application;

[0050] Figure 7b This is a second schematic diagram of the arrangement of N AC metal bars and boost metal bars in the filter assembly provided in an embodiment of the present application;

[0051] Figure 7c This is the third schematic diagram of the arrangement of N AC metal bars and boost metal bars in the filter assembly provided in an embodiment of the present application;

[0052] Figure 7d This is the fourth schematic diagram of the arrangement of N AC metal bars and boost metal bars in the filter assembly provided in an embodiment of the present application;

[0053] Figure 8 A structural schematic diagram of a magnetic ring in a filter assembly provided in an embodiment of the present application.

[0054] Reference numerals:

[0055] 10. AC metal busbar;

[0056] 20. Boost metal bar;

[0057] 30. Magnetic ring; 31. Air gap;

[0058] 40. Core center column; 41. First part; 42. Second part.

[0059] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0060] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0062] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] In the related art, the filter assembly usually uses a magnetic ring surrounding multiple AC metal bars (such as three-phase metal bars) arranged side by side in a certain direction, that is, the multiple AC metal bars are located inside the magnetic ring, and the boost metal bars are located outside the magnetic ring. In this way, in the driving mode, AC current flows through the AC metal bars. Since the multiple AC metal bars are evenly distributed in the magnetic ring, the magnetic fields they generate can offset each other, thereby avoiding saturation of the magnetic ring in the driving mode and maintaining the filtering and suppression effect of the magnetic ring. However, in the boost charging mode, multiple AC metal bars all flow through the same-phase boost current, which will cause the magnetic ring to saturate and heat up, thereby causing the filter to fail.

[0064] The applicant discovered that the magnetic ring can be made to surround the AC metal bar and the boost metal bar at the same time, that is, the AC metal bar and the boost metal bar are both located inside the magnetic ring. In this way, the magnetic field generated by the current flowing through the boost metal bar and the AC metal bar in the boost charging mode of the magnetic ring is offset inside the magnetic ring, so the magnetic ring will not cause filtering failure due to saturation heating. However, in the driving mode, because multiple AC metal bars are arranged side by side in a certain direction, when the boost metal bar is not working and only multiple AC metal bars flow through AC current, the magnetic ring will be locally saturated and heated due to the uneven distribution of the magnetic field. Long-term operation will also cause the filtering suppression effect to fail. It can be seen that existing filtering components often find it difficult to meet the filtering requirements in both modes at the same time.

[0065] Based on the above-mentioned problems discovered by the applicant, the applicant has improved the structure of the filter component. The technical solution described in the embodiments of this application is applicable to the filter component, the inverter including the filter component, the motor drive system including the inverter, and the vehicle using the motor drive system.

[0066] Please refer to Figure 1 , Figure 1 A filter component provided in some embodiments of the present application includes:

[0067] N AC metal bars 10, at least some of the N AC metal bars 10 are stacked, where N is an integer greater than 1;

[0068] The boost metal bus 20 is provided on one side of the N AC metal buses 10;

[0069] The magnetic ring 30 is disposed around the N AC metal bars 10 and the boost metal bar 20 . The N AC metal bars 10 and the boost metal bar 20 are spaced apart and relatively located inside the magnetic ring 30 .

[0070] In the embodiment of the present application, the N AC metal bars 10 may refer to metal bars used to pass different phases of AC power in the motor drive system in the drive mode. The number of these bars can be set according to actual conditions and is not specifically limited here. For example, taking the example of N AC metal bars 10 being able to output three-phase AC power, the N AC metal bars 10 may include a first metal bar, a second metal bar, and a third metal bar, wherein the first metal bar can pass U-phase AC power, the second metal bar can pass V-phase AC power, and the third metal bar can pass W-phase AC power. The U-phase AC power, the V-phase AC power, and the W-phase AC power have the same frequency, the same potential amplitude, and a phase difference of 120°. It is understood that the AC metal bars and the boost metal bars can be made of metals such as copper, alloy, aluminum, and iron.

[0071] At least part of the N AC metal bars 10 can be stacked. It is understood that the N AC metal bars 10 are stacked, such as Figure 2As shown, two adjacent AC metal bars 10 may be partially stacked together, as shown in FIG. Figure 3 As shown, two adjacent AC metal bars 10 can also be completely overlapped and stacked together. In this way, the integration of the N AC metal bars 10 is higher.

[0072] The boost metal bar 20 can be located on one side of the N stacked AC metal bars 10, and the magnetic ring 30 surrounds the N AC metal bars 10 and the boost metal bar 20 at the same time, so that the N AC metal bars 10 and the boost metal bar 20 can all be located within the magnetic ring 30, and the N AC metal bars 10 and the boost metal bar 20 are spaced and relatively distributed within the magnetic ring 30.

[0073] When the motor drive system is in the driving mode, the boost metal bar 20 does not work (i.e., no current flows through it), and the N AC metal bars 10 flow through the AC current. At this time, since the N AC metal bars 10 adopt a stacked structure, the N AC metal bars 10 are highly integrated in the magnetic ring 30. The magnetic fields generated by the AC current flowing through the N AC metal bars 10 can offset each other, thereby improving the problem of local saturation heating caused by uneven distribution of the magnetic ring 30, thereby causing filtering failure. When the motor drive system is in the boost charging mode, the boost metal bar 20 and the N AC metal bars 10 all flow through the boost current. At this time, the magnetic field generated by the current of the boost metal bar 20 and the N AC metal bars 10 is offset in the magnetic ring 30, so the magnetic ring 30 will not have saturation heating and thus cause filtering failure. Therefore, whether in the driving mode or in the boost charging mode, the filter component structure of the embodiment of the present application can improve the problem of filtering failure caused by saturation heating of the magnetic ring 30. In other words, the filter component can meet the filtering requirements in both modes and has a better filtering effect.

[0074] Optionally, in some embodiments, the orthographic projections of any two AC metal bars 10 among the N AC metal bars 10 along the stacking direction coincide with each other.

[0075] like Figure 3 As shown, in this embodiment, the orthographic projections of any two AC metal bars 10 along the stacking direction can overlap. In other words, N AC metal bars 10 can be completely overlapped and stacked together. In this way, the integration of the N AC metal bars 10 can be further improved, thereby further improving the problem of local saturation heating caused by uneven distribution of the magnetic ring 30 in the driving mode, which in turn causes filtering failure.

[0076] Optionally, in some embodiments, the filtering component further includes:

[0077] The core center column 40 is disposed in the magnetic ring 30 and located between the N AC metal bars 10 and the boost metal bar 20 . An air gap 31 is defined in the magnetic ring 30 , connecting the N AC metal bars 10 and the boost metal bar 20 .

[0078] like Figure 4 As shown, in this embodiment, a magnetic core pillar 40 may be further provided within the magnetic ring 30. The magnetic core pillar 40 may be located between the N AC metal bars 10 and the boost metal bar 20, thereby separating the N AC metal bars 10 from the boost metal bar 20. In other words, the magnetic core pillar 40 may divide the space within the magnetic ring 30 into two areas, so that the N AC metal bars 10 and the boost metal bar 20 may be located in different areas.

[0079] An air gap 31 may also be provided within the magnetic ring 30, connecting the N AC metal bars 10 and the boost metal bar 20. Specifically, the core center leg 40 does not completely separate the N AC metal bars 10 from the boost metal bar 20 within the magnetic ring 30. Instead, an air gap 31 is left. The size of the air gap 31 can be adjusted based on the maximum power in boost charging mode. Generally speaking, the greater the maximum power, the larger the air gap 31.

[0080] In this embodiment, the presence of the air gap 31 can provide a differential mode inductor in the boost charging mode, and the differential mode inductor can suppress the differential mode noise generated in the boost charging mode, thereby further improving the filtering effect of the filter component.

[0081] Optionally, in some embodiments, the magnetic core center column 40 is connected to the inner wall of the magnetic ring 30 .

[0082] like Figure 4 As shown, the core pillar 40 can be connected to the inner wall of the magnetic ring 30 between the N AC metal bars 10 and the boost metal bar 20. For example, taking the magnetic ring 30 as a rectangular magnetic ring 30, the N AC metal bars 10 and the boost metal bar 20 can be located on the left and right sides of the rectangular magnetic ring 30, respectively. The core pillar 40 can be connected to the inner wall of the upper or lower side of the rectangular magnetic ring 30, and spaced apart from the inner wall of the opposite side. In this way, an air gap 31 can be formed between the core pillar 40 and the inner wall of the spaced apart magnetic ring 30.

[0083] It is understandable that the core center column 40 can be fixedly connected to the inner wall of the magnetic ring 30 by gluing, welding, etc., and the core center column 40 can also be integrally formed with the magnetic ring 30.

[0084] Optionally, in some embodiments, the magnetic core center column 40 includes:

[0085] The first portion 41 is connected to the inner wall of the magnetic ring 30;

[0086] The second portion 42 is connected to the inner wall of the magnetic ring 30 . The first portion 41 and the second portion 42 are spaced apart along a direction perpendicular to the N AC metal bars 10 and toward the boost metal bar 20 .

[0087] like Figure 5As shown, the magnetic core center column 40 may include a first portion 41 and a second portion 42. The first portion 41 and the second portion 42 are spaced apart in a direction perpendicular to the N AC metal bars 10 and toward the boost metal bar 20, and are both connected to the inner wall of the magnetic ring 30. For example, taking the magnetic ring 30 as a rectangular magnetic ring 30, the N AC metal bars 10 and the boost metal bar 20 may be located on the left and right sides of the rectangular magnetic ring 30, respectively. The first portion 41 may be connected to the upper inner wall of the rectangular magnetic ring 30, and the second portion 42 may be connected to the lower inner wall of the rectangular magnetic ring 30. The first portion 41 and the second portion 42 may be spaced apart to form an air gap 31.

[0088] Optionally, in some embodiments, the first portion 41 and the second portion 42 are arranged opposite to each other.

[0089] It is understood that in order to more accurately adjust the size of the air gap 31 based on the maximum power in the boost charging mode, the first portion 41 and the second portion 42 can be arranged in a diametrically opposed relationship. Thus, the size of the air gap 31 can be calculated based on the spacing between the first portion 41 and the second portion 42, as well as the area of ​​the opposing surfaces of the first portion 41 and the second portion 42. In other words, once the area of ​​the opposing surfaces of the first portion 41 and the second portion 42 is determined, the size of the air gap 31 can be optimized as needed by adjusting the spacing between the first portion 41 and the second portion 42. This allows the differential mode inductance provided by the air gap 31 to better meet actual needs, thereby further enhancing the filtering effect of the filter component.

[0090] Optionally, in some embodiments, the magnetic core center column 40 is spaced apart from the inner wall of the magnetic ring 30 .

[0091] It is understood that when a magnetic conductor is exposed to an alternating magnetic field, electromagnetic induction generates eddy currents. This causes an uneven distribution of the amplitude and phase of the magnetic field strength and magnetic induction strength within the material, causing the phase of the magnetic induction strength to lag behind the phase of the magnetic field strength, thereby increasing energy loss, known as eddy current loss. The magnetic field generated by the magnetic potential of air gap 31 cuts through the N AC metal bars 10 and the boost metal bar 20, causing eddy current losses.

[0092] like Figure 6As shown, in this embodiment, the core center column 40 can be spaced apart from the inner wall of the magnetic ring 30. In other words, the core center column 40 and the magnetic ring 30 are independent of each other, and at least two air gaps 31 can be formed between the core center column 40 and the inner wall of the magnetic ring 30. Since the size of the air gap 31 can be determined according to the maximum power in the boost charging mode, when the maximum power in the boost charging mode is the same, the number of air gaps 31 increases, that is, the size of a single air gap 31 decreases. Accordingly, the edge effect of the magnetic field generated by the magnetic potential of the air gap 31 can be weakened as the size of the air gap 31 decreases, and thus the eddy current loss of the N AC metal bars 10 and the boost metal bar 20 can be reduced as the edge effect is weakened.

[0093] Optionally, in some embodiments, the number of the core pillars 40 is M, and the M core pillars 40 are spaced apart in a direction perpendicular to the N AC metal bars 10 toward the boost metal bar 20 , where M is an integer greater than 1.

[0094] In this embodiment, the number of core pillars 40 can be two or more, and they can be spaced apart in a direction perpendicular to the N AC metal bars 10 toward the boost metal bar 20. In this way, an air gap 31 can be formed between the core pillar 40 close to the magnetic ring 30 and the inner wall of the magnetic ring 30, and an air gap 31 can also be formed between two adjacent core pillars 40.

[0095] In this embodiment, the M core middle columns 40 can further increase the number of air gaps 31, thereby further reducing the size of a single air gap 31, weakening the edge effect of the magnetic field, and further reducing the eddy current loss of the N AC metal bars 10 and the boost metal bar 20.

[0096] See also Figures 7a to 7d , Optionally, in some embodiments, the boost metal bar 20 and the N AC metal bars 10 are both arranged along the first direction (X);

[0097] Alternatively, the boost metal bar 20 and the N AC metal bars 10 are all arranged along the second direction (Y);

[0098] Alternatively, one of the boost metal bar 20 and the N AC metal bars 10 is arranged along the first direction (X), and the other is arranged along the second direction (Y);

[0099] The first direction (X) is perpendicular to the direction from the N AC metal bars 10 to the boost metal bar 20 , and the second direction (Y) is parallel to the direction from the N AC metal bars 10 to the boost metal bar 20 .

[0100] To facilitate description of the solution of the embodiment of the present application, the following description will be made by taking the direction of the N AC metal bars 10 toward the boost metal bar 20 as an example, which is a horizontal direction.

[0101] like Figure 7a As shown, the boosting metal bar 20 and the N AC metal bars 10 can be arranged in a direction perpendicular to the direction of the N AC metal bars 10 toward the boosting metal bar 20. In other words, the boosting metal bar 20 and the N AC metal bars 10 can be arranged in a vertical direction.

[0102] like Figure 7b As shown, the boosting metal bar 20 and the N AC metal bars 10 can be arranged in a direction parallel to the direction in which the N AC metal bars 10 face the boosting metal bar 20. In other words, the boosting metal bar 20 and the N AC metal bars 10 can be arranged in a horizontal direction.

[0103] like Figure 7c As shown, the boosting metal bar 20 can be arranged in a direction perpendicular to the direction in which the N AC metal bars 10 face the boosting metal bar 20, and the N AC metal bars 10 can be arranged in a direction parallel to the direction in which the N AC metal bars 10 face the boosting metal bar 20. In other words, the boosting metal bar 20 can be arranged in a vertical direction, and the N AC metal bars 10 can be arranged in a horizontal direction.

[0104] like Figure 7d As shown, the boosting metal bar 20 can be arranged in a direction parallel to the direction in which the N AC metal bars 10 face the boosting metal bar 20, and the N AC metal bars 10 can be arranged in a direction perpendicular to the direction in which the N AC metal bars 10 face the boosting metal bar 20. In other words, the boosting metal bar 20 can be arranged in a horizontal direction, and the N AC metal bars 10 can be arranged in a vertical direction.

[0105] It should be understood that the aforementioned orientations of the boost metal busbar 20 and the N AC metal busbars 10 are merely a partial list of configuration options, intended to facilitate understanding of the technical content of this application, and are not intended to limit the technical solutions of this application. For example, in some application scenarios, depending on actual needs, the boost metal busbar 20 and the N AC metal busbars 10 may also be arranged relative to each other in an inclined manner within the magnetic ring 30, without specific limitation herein.

[0106] In this embodiment, the directions and positions of the boost metal bus 20 and the N AC metal bus bars 10 can be adjusted according to the actual layout and space of the motor drive system, so that the structure of the filter component is no longer constrained by the position of the metal bus bars, and the filter component has a higher degree of freedom.

[0107] Optionally, in some embodiments, the cross-section of the magnetic ring 30 is rectangular, circular, or elliptical.

[0108] In this embodiment, the shape of the magnetic ring 30 can also be selected according to actual needs, for example, Figure 6 As shown, the cross-sectional shape of the magnetic ring 30 can be rectangular, that is, the magnetic ring 30 can be a rectangular magnetic ring 30. Figure 8 As shown, the cross-sectional shape of the magnetic ring 30 can also be elliptical, that is, the magnetic ring 30 can be an elliptical magnetic ring 30. It is understandable that the cross-sectional shape of the magnetic ring 30 can also be circular, etc. In this way, the degree of freedom of the filter component is further improved.

[0109] The present application also provides an inverter that may include the aforementioned filter assembly. Because the inverter utilizes the aforementioned filter assembly structure, the problem of filtering failure caused by saturation heating of the magnetic ring can be alleviated in both driving mode and boost charging mode. In other words, the inverter can meet the filtering requirements in both modes, achieving better filtering effects.

[0110] The present application also provides a motor drive system that may include the aforementioned inverter. Thus, when the motor drive system is in drive mode or boost charging mode, the magnetic ring will not saturate and heat up, thereby preventing filtering failure. This improves the filtering effect and reliability of the motor drive system.

[0111] The present application also provides a vehicle that can include the above-mentioned motor drive system. As a result, the motor drive system has better filtering effects and higher reliability, which can improve vehicle driving comfort and improve vehicle charging safety.

[0112] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A filter assembly comprising: N AC metal bars, wherein at least parts of any two adjacent AC metal bars among the N AC metal bars are stacked, and N is an integer greater than 1; A boost metal busbar, provided on one side of the N AC metal buses; A magnetic ring is arranged around the N AC metal bars and the boost metal bar. The N AC metal bars and the boost metal bar are spaced apart and relatively located inside the magnetic ring.

2. The filter assembly according to claim 1, wherein The orthographic projections of any two of the N AC metal bars along the stacking direction coincide with each other.

3. The filter assembly according to claim 1 , further comprising: The magnetic core center column is arranged in the magnetic ring and located between the N AC metal bars and the boost metal bar. An air gap is provided in the magnetic ring, and the air gap connects the N AC metal bars and the boost metal bar.

4. The filter assembly according to claim 3, wherein: The magnetic core center column is connected to the inner wall of the magnetic ring.

5. The filter assembly according to claim 3, wherein: The magnetic core center column includes: The first part is connected to the inner wall of the magnetic ring; The second part is connected to the inner wall of the magnetic ring, and the first part and the second part are spaced apart along a direction perpendicular to the N AC metal bars and toward the boost metal bar. The filter assembly according to claim 5 , wherein: The first part and the second part are arranged opposite to each other.

7. The filter assembly according to claim 3, wherein: The magnetic core center column is spaced apart from the inner wall of the magnetic ring.

8. The filter assembly according to claim 7, wherein: The number of the magnetic core columns is M, and the M magnetic core columns are spaced apart in a direction perpendicular to the N AC metal bars and toward the boost metal bar, where M is an integer greater than 1.

9. The filter assembly according to claim 1, wherein: The boost metal busbar and the N AC metal busbars are arranged along a first direction; Alternatively, the boost metal bar and the N AC metal bars are both arranged along the second direction; Alternatively, the boost metal busbar is arranged along the first direction, and the N AC metal busbars are arranged along the second direction; Alternatively, the boost metal busbar is arranged along the second direction, and the N AC metal busbars are arranged along the first direction; The first direction is perpendicular to the direction of the N AC metal bars toward the boost metal bar, and the second direction is parallel to the direction of the N AC metal bars toward the boost metal bar.

10. The filter assembly according to claim 1, wherein The cross-section of the magnetic ring is rectangular, circular or elliptical.

11. An inverter comprising the filter assembly according to any one of claims 1 to 10.

12. A motor drive system comprising the inverter according to claim 11.

13. A vehicle comprising the motor drive system according to claim 12.

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