Bus capacitor, motor controller and electric drive assembly
By adopting the ring bus capacitor design and the coiled core package of the ring-shaped single-body capacitor formed by primary winding, it directly contacts the pole ear through the connection row, and solves the problems of high cost, poor consistency and uneven temperature in the prior art, and realizes a compact, efficient and low stray inductor motor controller design.
Patent Information
- Application Number
- CN202323299793.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-04
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2033-12-04
AI Technical Summary
The manufacturing process of bus capacitors in existing motor controllers is high, has poor consistency, uneven temperature, complex structure, low power density and difficult to achieve low stray inductance design.
The capacitor design of the ring busbar is adopted. The capacitor coiled core package is a ring monomer structure formed by winding at one time. It is directly in electrical contact with the electrode through the positive and negative electrode connection rows, avoiding complex copper strip welding integration, and realizing distributed electrode connection.
Reduces manufacturing process costs, improves consistency and temperature uniformity, simplifies structure, improves power density, and achieves a low-straight inductance design.
Smart Images
Figure CN222600752U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor control, and in particular to a bus capacitor, a motor controller and an electric drive assembly. Background Art
[0002] The motor controller of new energy vehicles is a key component that converts the DC power of the power battery into the AC power required by the three-phase motor. This conversion process is called inversion in the field of power electronics. The core components that perform the inversion process are high-frequency switching power semiconductor modules such as IGBT and silicon carbide MOS.
[0003] During the switching process of the semiconductor module, the front end of the inverter circuit topology of the motor controller also needs a bus capacitor for energy storage and voltage stabilization. In the prior art, the bus capacitor used in the motor controller is generally formed by connecting multiple wound film capacitor core packages in parallel, with high manufacturing process costs and poor consistency. In addition, the bus capacitor used in the existing motor controller is generally rectangular in shape, the temperature of the capacitor core is high, and the temperature of multiple parallel core packages is uneven. In addition, the existing bus capacitors are generally integrated by welding complex copper bars, with complex structures, low power density, and high stray inductance. Utility Model Content
[0004] The objectives of the utility model include, for example, providing a bus capacitor, a motor controller and an electric drive assembly, which have a compact and simple structure, a low manufacturing process cost, good consistency, uniform temperature and no need for complex copper bars for welding integration, high power density and low stray inductance design.
[0005] The embodiments of the present invention can be implemented as follows:
[0006] In the first aspect, the utility model provides a busbar capacitor, including a busbar shell, a capacitor rolled core package, a positive electrode connection row and a negative electrode connection row, the busbar shell is annular and has an annular accommodating groove, the capacitor rolled core package is an annular monomer structure formed by one-time winding, and is assembled in the annular accommodating groove, one side surface of the capacitor rolled core package is provided with a plurality of positive electrode ears at intervals, and the other side surface is provided with a plurality of negative electrode ears at intervals, the positive electrode connection row is provided on one side of the capacitor rolled core package and is electrically contacted with the plurality of positive electrode ears, and the negative electrode connection row is provided on the other side of the capacitor rolled core package and is electrically contacted with the plurality of negative electrode ears.
[0007] In an optional embodiment, the positive electrode connection bar and the negative electrode connection bar are both annular and accommodated in the annular accommodation groove, and a positive electrode output terminal is provided on the inner side of the positive electrode connection bar, and a positive electrode input terminal is provided on the outer side of the positive electrode connection bar, a negative electrode output terminal is provided on the inner side of the negative electrode connection bar, and a negative electrode input terminal is provided on the outer side of the negative electrode connection bar, and the positive electrode output terminal and the negative electrode output terminal both extend to the inner side of the inner edge shell.
[0008] In an optional embodiment, the busbar shell includes an outer edge shell, an inner edge shell and a shell end plate, the shape of the shell end plate is adapted to the shape of the capacitor rolled core package, the outer edge shell is arranged on the outer edge of the shell end plate, the inner edge shell is arranged on the inner edge of the shell end plate, the annular receiving groove is formed between the outer edge shell and the inner edge shell, and the capacitor rolled core package is arranged between the outer edge shell and the inner edge shell.
[0009] In an optional embodiment, a slot is further provided on the inner edge casing, and both the positive output terminal and the negative output terminal extend out of the annular receiving groove through the slot.
[0010] In an optional embodiment, the positive electrode connection row includes a positive electrode connection sheet and a positive output ring, wherein the positive electrode connection sheet is arranged between the outer shell end plate and the capacitor rolled core package and is electrically contacted with multiple positive electrode tabs at the same time, and the positive electrode output ring is arranged on the inner side of the positive electrode connection sheet and protrudes toward the direction of the negative electrode connection row, and the positive electrode output ring is located between the capacitor rolled core package and the inner edge shell, and the positive output terminal is arranged on the positive output ring and extends inwardly by bending.
[0011] In an optional embodiment, the negative electrode connection row includes a negative electrode connection sheet and a negative electrode output ring, wherein the negative electrode connection sheet is arranged between the outer shell end plate and the capacitor rolled core package and is electrically contacted with multiple negative electrode tabs at the same time, and the negative electrode output ring is arranged on the inner side of the negative electrode connection sheet and protrudes toward the direction of the positive electrode connection row, and the negative electrode output ring is located between the capacitor rolled core package and the inner edge shell, and the negative electrode output terminal is arranged on the negative electrode output ring and extends inwardly by bending.
[0012] In an optional embodiment, the busbar capacitor further includes a Y capacitor, the outer side of the busbar housing partially protrudes outward and forms a boss outer edge, and the Y capacitor is arranged inside the boss outer edge.
[0013] In an optional embodiment, a fixing seat is further provided inside the outer edge of the boss, and an input terminal and a ground terminal are mounted on the fixing seat, the input terminal is electrically contacted with one pole of the Y capacitor and with the positive input terminal or the negative input terminal, and the ground terminal is electrically contacted with the other pole of the Y capacitor.
[0014] In the second aspect, the utility model provides a motor controller, including a control housing, a power component and a bus capacitor, wherein the power component and the bus capacitor are both accommodated in the control housing, the bus capacitor includes a bus housing, a capacitor rolled core package, a positive electrode connection row and a negative electrode connection row, the bus housing is annular and has an annular accommodating groove, the capacitor rolled core package is an annular monomer structure formed by one-time winding, and is assembled in the annular accommodating groove, one side surface of the capacitor rolled core package is provided with a plurality of positive pole ears at intervals, and the other side surface is provided with a plurality of negative pole ears at intervals, the positive pole connection row is provided on one side of the capacitor rolled core package, and is electrically contacted with the plurality of positive pole ears, the negative pole connection row is provided on the other side of the capacitor rolled core package, and is electrically contacted with the plurality of negative pole ears, the power component is provided in the bus housing, and is electrically connected to the positive pole connection row and the negative pole connection row.
[0015] In an optional embodiment, the power component includes a plurality of power modules and a heat sink, wherein the plurality of power modules are attached to the periphery of the heat sink, a positive output terminal is provided on the inner side of the positive connection row, a negative output terminal is provided on the inner side of the negative connection row, the positive output terminal and the negative output terminal both extend to the inner side of the inner edge shell, and each of the power modules is electrically contacted with the positive output terminal and the negative output terminal at the same time.
[0016] In a third aspect, the utility model provides an electric drive assembly, including a motor and a motor controller, wherein the motor controller is arranged at the end of the motor, and the motor controller includes a control housing, a power component and a bus capacitor, wherein the power component and the bus capacitor are both accommodated in the control housing, and the bus capacitor includes a bus housing, a capacitor rolled core package, a positive electrode connection row and a negative electrode connection row, wherein the bus housing is annular and has an annular accommodating groove, the capacitor rolled core package is an annular monomer structure formed by one-time winding, and is assembled in the annular accommodating groove, a plurality of positive pole ears are arranged at intervals on one side surface of the capacitor rolled core package, and a plurality of negative pole ears are arranged at intervals on the other side surface, the positive pole connection row is arranged on one side of the capacitor rolled core package, and is electrically in contact with the plurality of positive pole ears, the negative pole connection row is arranged on the other side of the capacitor rolled core package, and is electrically in contact with the plurality of negative pole ears, and the power component is arranged in the bus housing, and is electrically connected to the positive pole connection row and the negative pole connection row.
[0017] The beneficial effects of the embodiments of the present utility model include, for example:
[0018] The utility model provides a busbar capacitor, a motor controller and an electric drive assembly, wherein an annular busbar housing is used to form an annular receiving groove, the capacitor winding core package is an annular monomer structure formed by one-time winding, and is assembled in the annular receiving groove, and at the same time, the two side surfaces of the capacitor winding core package are respectively provided with a plurality of positive pole ears and a plurality of negative pole ears, and the positive electrode connection row and the negative electrode connection row are respectively arranged on both sides of the capacitor winding core package, and are respectively in electrical contact with the plurality of positive pole ears and the plurality of negative pole ears. Compared with the prior art, the utility model avoids the formation of a busbar capacitor after the film capacitor core package is connected in parallel in the conventional technology by adopting an annular monomer capacitor winding core package formed by one-time winding, and the manufacturing process cost is lower and the consistency is better. In addition, an annular busbar capacitor is adopted, and the integrated design makes the capacitor temperature more uniform. In addition, the pole ear connection is realized by directly setting the positive pole connection row and the negative pole connection row on both sides of the capacitor, avoiding the use of a complex copper bar structure for welding integration, and the structure is simple and compact, with high power density, and a distributed pole ear is adopted to achieve a low stray inductance design. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 A schematic diagram of the structure of a bus capacitor provided in the first embodiment of the utility model;
[0021] Figure 2 A schematic diagram of the internal structure of a bus capacitor provided in the first embodiment of the utility model;
[0022] Figure 3 A schematic diagram of the decomposed structure of a bus capacitor provided in the first embodiment of the utility model;
[0023] Figure 4 A schematic cross-sectional structure diagram of a busbar capacitor provided in the first embodiment of the utility model;
[0024] Figure 5 for Figure 4 A partial enlarged schematic diagram of middle V;
[0025] Figure 6 for Figure 4 A partial enlarged schematic diagram of middle VI;
[0026] Figure 7A schematic diagram of the structure of a motor controller provided in the second embodiment of the utility model;
[0027] Figure 8 for Figure 7 Schematic diagram of the assembly structure of the bus capacitor and power components.
[0028] Icons: 100-busbar capacitor; 110-busbar housing; 111-annular receiving groove; 113-inner edge enclosure; 115-outer edge enclosure; 117-enclosure end plate; 119-slot; 120-outer edge of boss; 121-fixed seat; 123-input terminal; 125-grounding terminal; 130-capacitor rolled core package; 131-positive pole ear; 133-negative pole ear; 150-positive pole connection row; 151- Positive output terminal; 153-positive input terminal; 155-positive connecting piece; 157-positive output ring; 170-negative connecting row; 171-negative output terminal; 173-negative input terminal; 175-negative connecting piece; 177-negative output ring; 190-Y capacitor; 200-motor controller; 210-control housing; 230-power component; 231-power module; 233-heat sink. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.
[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.
[0034] As disclosed in the background art, the busbar capacitor in the prior art is usually formed by connecting multiple wound film capacitor core packages in parallel, which has the following disadvantages:
[0035] 1. The manufacturing process cost is high and the consistency is poor.
[0036] 2. The busbar capacitors used in existing motor controllers are generally rectangular in shape, the core temperature of the capacitor is high, and the temperature of multiple parallel core packages is uneven.
[0037] 3. The busbar capacitors used in existing motor controllers with integrated filter capacitors are generally integrated by welding complex copper bars, which have complex structures, low power density, and are difficult to achieve low stray inductance design.
[0038] 4. The electrical connection copper busbar between the existing motor controller power module and the bus capacitor occupies valuable internal space, and the compactness needs to be improved.
[0039] In order to solve the above problems, the present invention provides a novel bus capacitor, motor controller and electric drive assembly. It should be noted that the features in the embodiments of the present invention can be combined with each other without conflict.
[0040] See also Figures 1 to 6 The present embodiment provides a bus capacitor 100, which has a compact and simple structure, a low manufacturing process cost, good consistency, uniform temperature, and does not require complex copper bars for welding and integration, has a high power density, and achieves a low stray inductance design.
[0041] The busbar capacitor 100 provided in this embodiment includes a busbar housing 110, a capacitor winding core package 130, a positive electrode connection row 150, a negative electrode connection row 170 and a Y capacitor 190. The busbar housing 110 is annular and has an annular accommodating groove 111. The capacitor winding core package 130 is an annular monomer structure formed by one-time winding and is assembled in the annular accommodating groove 111. A plurality of positive pole tabs 131 are arranged at intervals on one side of the capacitor winding core package 130, and a plurality of negative pole tabs 133 are arranged at intervals on the other side of the capacitor winding core package 130. The positive electrode connection row 150 is arranged on one side of the capacitor winding core package 130 and is in electrical contact with the plurality of positive pole tabs 131. The negative electrode connection row 170 is arranged on the other side of the capacitor winding core package 130 and is in electrical contact with the plurality of negative pole tabs 133. The outer side of the busbar housing 110 partially protrudes outward and forms a boss outer edge 120, and the Y capacitor 190 is arranged in the boss outer edge 120.
[0042] In this embodiment, the Y capacitor 190 plays a role in filtering out common-mode interference, and this embodiment avoids the conventional technology of forming a busbar capacitor 100 by connecting the thin-film capacitor core package in parallel by adopting a one-time winding forming annular monomer capacitor winding core package 130, and the manufacturing process cost is lower and the consistency is better. In addition, the annular busbar capacitor 100 is adopted, and the integrated design makes the capacitor temperature more uniform. In addition, the positive electrode connection row 150 and the negative electrode connection row 170 are directly arranged on both sides of the capacitor to realize the connection of the pole ears, avoiding the use of a complex copper busbar structure for welding integration, with a simple and compact structure, high power density, and the use of distributed pole ears to achieve a low stray inductance design.
[0043] It should be noted that the bus capacitor 100 in this embodiment is suitable for the motor controller 200 ( Figure 7 and Figure 8 As shown, the motor controller 200 is arranged at the end of the motor, and the bus capacitor 100 is an annular structure as a whole, that is, the external bus shell 110 and the internal capacitor rolled core package 130 are both annular structures, so that when the motor controller 200 is assembled, the power module 231 and the heat sink 233 can be assembled at the center position of the bus capacitor 100, thereby making the overall structure of the motor controller 200 more compact, which is conducive to the miniaturization of the motor controller 200.
[0044] It is worth noting that, in this embodiment, after the capacitor core package 130, the positive electrode connection bar 150 and the negative electrode connection bar 170 are installed in place, a sealing glue layer is also required in the busbar housing 110 for overall sealing protection.
[0045] In some embodiments, the positive electrode connection bar 150 and the negative electrode connection bar 170 are both annular and accommodated in an annular accommodation groove, and a positive electrode output terminal 151 is arranged on the inner side of the positive electrode connection bar 150, and a positive electrode input terminal 153 is arranged on the outer side of the positive electrode connection bar 150, a negative electrode output terminal 171 is arranged on the inner side of the negative electrode connection bar 170, and a negative electrode input terminal 173 is arranged on the outer side of the negative electrode connection bar 170, and both the positive electrode output terminal 151 and the negative electrode output terminal 171 extend to the inner side of the inner edge shell 113. Specifically, the positive electrode connection row 150 and the negative electrode connection row 170 are both arranged in the capacitor housing, wherein the positive electrode connection row 150 is located at the bottom of the annular accommodating groove, and the negative electrode connection row 170 is located at the top of the annular accommodating groove, and the positive electrode connection row 150 and the negative electrode connection row 170 are respectively used to realize the electrical connection of the positive electrode ear 131 and the negative electrode ear 133 on the two side surfaces of the capacitor rolled core package 130, and the input terminal 123 is set on the outer side of the positive electrode connection row 150 and the negative electrode connection row 170, and the output terminal is set on the inner side, so that the input and output structures are more reasonable, and a more compact structure can be achieved during assembly.
[0046] The busbar housing 110 includes an outer shell 115, an inner shell 113 and a shell end plate 117. The shape of the shell end plate 117 is adapted to the shape of the capacitor rolled core package 130. The outer shell 115 is arranged on the outer edge of the shell end plate 117, and the inner shell 113 is arranged on the inner edge of the shell end plate 117. An annular receiving groove 111 is formed between the outer shell 115 and the inner shell 113, and the capacitor rolled core package 130 is arranged between the outer shell 115 and the inner shell 113. Specifically, the outer shell 115, the inner shell 113 and the shell end plate 117 are integrally prepared and formed using insulating materials, and the shell end plate 117 is also annular, and the inner shell 113 and the outer shell 115 are both cylindrical and fixed to the inner edge and outer edge of the shell end plate 117, respectively. The capacitor rolled core package 130 can be limited by the inner edge shell 113 and the outer edge shell 115. The inner edge shell 113 and the outer edge shell 115 can have the same height relative to the shell end plate 117, and the height can be greater than the height of the capacitor rolled core package 130 relative to the shell end plate 117, which can ensure the flatness of the end surface of the busbar capacitor 100 on the one hand, and ensure the covering and assembly effect of the capacitor rolled core package 130 on the other hand, so that the busbar shell 110 can achieve a better protection effect on the capacitor rolled core package 130.
[0047] It should be noted that in the present embodiment, both the positive output terminal 151 and the negative output terminal 171 can be multiple, for example, there can be three, and the three positive output terminals 151 and the three negative output terminals 171 are arranged close to each other in pairs, so that three power modules 231 can be connected correspondingly at the center of the bus capacitor 100. The number of the positive output terminal 151 and the negative output terminal 171 is not specifically limited here.
[0048] In some embodiments, a slot 119 is further provided on the inner edge casing 113, and the positive output terminal 151 and the negative output terminal 171 extend out of the annular receiving groove through the slot 119. Specifically, there may be multiple slots 119, and the positive output terminal 151 and the negative output terminal 171 extend out of the inner edge casing 113 through the corresponding slots 119, thereby achieving electrical contact with the power module 231 inside the inner edge casing 113. The shape and size of the slot 119 can be determined according to the shape and size of the positive output terminal 151 and the negative output terminal 171.
[0049] The positive electrode connection row 150 includes a positive electrode connection sheet 155 and a positive electrode output ring 157. The positive electrode connection sheet 155 is arranged between the shell end plate 117 and the capacitor rolled core package 130, and is electrically contacted with multiple positive electrode ears 131 at the same time. The positive electrode output ring 157 is arranged on the inner side of the positive electrode connection sheet 155 and protrudes toward the direction of the negative electrode connection row. The positive electrode output ring 157 is located between the capacitor rolled core package 130 and the inner edge shell 113. The positive output terminal 151 is arranged on the positive electrode output ring 157 and extends inwardly. Specifically, the positive connecting piece 155 is a thin copper sheet structure, and the positive output ring 157 is integrally arranged on the inner edge of the positive connecting piece 155. The design of the positive output ring 157, on the one hand, facilitates the positive output terminal 151 to move closer to the negative connecting row 170, so that the positive output terminal 151 and the negative output terminal 171 are paired with each other; on the other hand, the positive output ring 157 can be inserted between the capacitor rolled core package 130 and the inner edge shell 113, which can make the structure between the capacitor rolled core package 130 and the inner edge shell 113 more compact, and make the capacitor rolled core package 130 better tightened to avoid loose gaps.
[0050] In some embodiments, the negative electrode connection row 170 includes a negative electrode connection sheet 175 and a negative electrode output ring 177. The negative electrode connection sheet 175 is arranged between the outer shell end plate 117 and the capacitor rolled core package 130, and is electrically contacted with multiple negative electrode tabs 133 at the same time. The negative electrode output ring 177 is arranged on the inner side of the negative electrode connection sheet 175 and protrudes toward the direction of the positive electrode connection row. The negative electrode output ring 177 is located between the capacitor rolled core package 130 and the inner edge shell 113. The negative electrode output terminal 171 is arranged on the negative electrode output ring 177 and extends inwardly. Specifically, the negative electrode connecting piece 175 is a thin copper sheet structure, and the negative electrode output ring 177 is integrally arranged on the inner edge of the negative electrode connecting piece 175. The design of the negative electrode output ring 177, on the one hand, facilitates the negative electrode output terminal 171 to move closer to the positive electrode connecting row 150, so that the positive electrode output terminal 151 and the negative electrode output terminal 171 can move closer to each other in pairs; on the other hand, the negative electrode output ring 177 can be inserted between the capacitor rolled core package 130 and the inner edge shell 113, which can make the structure between the capacitor rolled core package 130 and the inner edge shell 113 more compact, and make the capacitor rolled core package 130 better tightened to avoid loose gaps.
[0051] It should be noted that the two sides of the capacitor core package 130 are respectively clamped by the positive electrode connecting sheet 155 and the negative electrode connecting sheet 175, and the positive electrode connecting sheet 155 and the negative electrode connecting sheet 175 are multi-point welded by laser to the positive electrode tab 131 and the negative electrode tab 133 on both sides. The widely separated tabs and the wide and thin connecting sheets are conducive to reducing the stray inductance of the ring bus capacitor 100.
[0052] In some embodiments, a fixing seat 121 is further provided inside the outer edge 120 of the boss, and an input terminal 123 and a grounding terminal 125 are mounted on the fixing seat 121. The input terminal 123 is in electrical contact with one pole of the Y capacitor 190 and is in electrical contact with the positive input terminal 153 or the negative input terminal 173, and the grounding terminal 125 is in electrical contact with the other pole of the Y capacitor 190. Specifically, the fixing seat 121 is a nut seat, and the input terminal 123 and the grounding terminal 125 can be a conductive screw structure. The side of the Y capacitor 190 abuts against the fixing seat 121, and two capacitor sheet terminals are provided on the side of the Y capacitor 190, which are respectively used to electrically contact the grounding terminal 125 and the input terminal 123.
[0053] It is worth noting that there can be two Y capacitors 190, the two Y capacitors 190 are respectively a positive bus Y capacitor and a negative bus Y capacitor, and two capacitor sheet terminals are provided on the side of each Y capacitor 190. There can also be two grounding terminals 125, the two grounding terminals 125 are respectively a positive bus Y capacitor grounding terminal and a negative bus Y capacitor grounding terminal, the positive bus Y capacitor grounding terminal and the negative bus Y capacitor grounding terminal are respectively electrically in contact with the capacitor sheet terminals on the two Y capacitors 190, and there can also be two input terminals 123, the two input terminals 123 are respectively an input positive bus terminal and an input negative bus terminal. Specifically, the input positive bus terminal is electrically in contact with the positive input terminal 153 and the capacitor sheet terminal of the positive bus Y capacitor; the input negative bus terminal is electrically in contact with the negative input terminal 173 and the capacitor sheet terminal of the negative bus Y capacitor; the positive bus Y capacitor grounding terminal is electrically in contact with another capacitor sheet terminal of the positive bus Y capacitor; the negative bus Y capacitor grounding terminal is electrically in contact with another capacitor sheet terminal of the positive bus Y capacitor.
[0054] In summary, the present embodiment provides a busbar capacitor 100, a motor controller 200 and an electric drive assembly, wherein an annular busbar housing 110 is used to form an annular receiving groove 111, and the capacitor rolled core package 130 is an annular monomer structure formed by one-time winding, and is assembled in the annular receiving groove 111, and at the same time, the two side surfaces of the capacitor rolled core package 130 are respectively provided with a plurality of positive pole ears 131 and a plurality of negative pole ears 133, and the positive electrode connection row 150 and the negative electrode connection row 170 are respectively arranged on both sides of the capacitor rolled core package 130, and are respectively in electrical contact with the plurality of positive pole ears 131 and the plurality of negative pole ears 133. The present embodiment avoids the conventional technology of forming a busbar capacitor 100 by connecting the thin film capacitor core package in parallel through the use of an annular monomer capacitor rolled core package 130 formed by one-time winding, and the manufacturing process cost is lower and the consistency is better. In addition, an annular busbar capacitor 100 is adopted, and the integrated design makes the capacitor temperature more uniform. In addition, the positive electrode connection bar 150 and the negative electrode connection bar 170 are directly arranged on both sides of the capacitor to achieve pole ear connection, avoiding the use of complex copper busbar structure for welding integration. The structure is simple and compact, with high power density, and distributed pole ears are used to achieve low stray inductance design.
[0055] See also Figure 7 and Figure 8 This embodiment provides a motor controller 200, including a control housing 210, a power component 230 and a bus capacitor 100, wherein the basic structure and principle of the bus capacitor 100 and the technical effects produced are the same as those of the above-mentioned embodiment of the bus capacitor 100. For the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding contents in the above-mentioned embodiment of the bus capacitor 100.
[0056] In some embodiments, the motor controller 200 includes a control housing 210, a power component 230 and a bus capacitor 100, the power component 230 and the bus capacitor 100 are both accommodated in the control housing 210, the bus capacitor 100 includes a bus housing 110, a capacitor winding core package 130, a positive electrode connection row 150 and a negative electrode connection row 170, the bus housing 110 is annular and has an annular receiving groove 111, the capacitor winding core package 130 is an annular monomer structure formed by one-time winding, and is assembled in the annular receiving groove 111. A plurality of positive pole ears 131 are arranged at intervals on the surface of one side of the capacitor rolled core package 130, and a plurality of negative pole ears 133 are arranged at intervals on the surface of the other side. The positive electrode connection row 150 is arranged on one side of the capacitor rolled core package 130 and is electrically in contact with the plurality of positive pole ears 131. The negative electrode connection row 170 is arranged on the other side of the capacitor rolled core package 130 and is electrically in contact with the plurality of negative pole ears 133. The power component 230 is arranged in the busbar housing 110 and is electrically connected to the positive electrode connection row 150 and the negative electrode connection row 170.
[0057] In some embodiments, the power component 230 includes a plurality of power modules 231 and a heat sink 233, wherein the plurality of power modules 231 are attached to the periphery of the heat sink 233, a positive output terminal 151 is disposed on the inner side of the positive connection row 150, and a negative output terminal 171 is disposed on the inner side of the negative connection row 170, and both the positive output terminal 151 and the negative output terminal 171 extend to the inner side of the inner edge casing 113, and each power module 231 is electrically contacted with the positive output terminal 151 and the negative output terminal 171 at the same time.
[0058] It is worth noting that in this embodiment, the power module 231 and the heat sink 233 can be integrated and placed in the center of the annular bus capacitor 100, shortening the distance between the power module 231 terminal and the capacitor output terminal, and reducing the stray inductance of the electrical connection from the power module 231 to the bus capacitor 100. At the same time, the bus capacitor 100 and the power module 231 are compactly installed and integrated, thereby improving the power density of the motor controller 200.
[0059] The present embodiment provides an electric drive assembly, including a motor and a motor controller 200, wherein the basic structure and principle of the motor controller 200 and the technical effects produced are the same as those of the above-mentioned embodiment of the motor controller 200. For the sake of brief description, for parts not mentioned in the present embodiment, reference may be made to the corresponding contents in the above-mentioned embodiment of the motor controller 200.
[0060] The electric drive assembly provided in this embodiment includes a motor and a motor controller 200. The motor controller 200 is arranged at the end of the motor. The motor controller 200 includes a control housing 210, a power component 230 and a bus capacitor 100. The power component 230 and the bus capacitor 100 are both accommodated in the control housing 210. The bus capacitor 100 includes a bus housing 110, a capacitor rolled core package 130, a positive electrode connection row 150 and a negative electrode connection row 170. The bus housing 110 is annular and has an annular receiving groove 111. The capacitor rolled core package 130 is an annular single-pole winding formed once. The body structure is assembled in the annular accommodating groove 111, a plurality of positive pole ears 131 are arranged at intervals on the surface of one side of the capacitor rolled core package 130, and a plurality of negative pole ears 133 are arranged at intervals on the surface of the other side, the positive electrode connection row 150 is arranged on one side of the capacitor rolled core package 130, and is electrically in contact with the plurality of positive pole ears 131, the negative electrode connection row 170 is arranged on the other side of the capacitor rolled core package 130, and is electrically in contact with the plurality of negative pole ears 133, and the power component 230 is arranged in the busbar housing 110, and is electrically connected to the positive electrode connection row 150 and the negative electrode connection row 170.
[0061] In some embodiments, the control housing 210 is disposed at the end of the motor, so that the motor and the motor controller 200 can be installed integrally and the overall size can be reduced.
[0062] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A busbar capacitor, characterized in that: The invention comprises a busbar shell (110), a capacitor core package (130), a positive electrode connection bar (150) and a negative electrode connection bar (170); the busbar shell (110) is annular and has an annular receiving groove (111); the capacitor core package (130) is an annular monomer structure formed by one-time winding and is assembled in the annular receiving groove (111); a plurality of positive electrode tabs (131) are arranged at intervals on one side of the surface of the capacitor core package (130); a plurality of negative electrode tabs (133) are arranged at intervals on the other side of the surface; the positive electrode connection bar (150) is arranged on one side of the capacitor core package (130) and is in electrical contact with the plurality of positive electrode tabs (131); the negative electrode connection bar (170) is arranged on the other side of the capacitor core package (130) and is in electrical contact with the plurality of negative electrode tabs (133).
2. The bus capacitor according to claim 1, characterized in that: The positive electrode connection bar (150) and the negative electrode connection bar (170) are both annular and accommodated in the annular accommodation groove, and a positive electrode output terminal (151) is arranged on the inner side of the positive electrode connection bar (150), and a positive electrode input terminal (153) is arranged on the outer side of the positive electrode connection bar (150), a negative electrode output terminal (171) is arranged on the inner side of the negative electrode connection bar (170), and a negative electrode input terminal (173) is arranged on the outer side of the negative electrode connection bar (170), and the positive electrode output terminal (151) and the negative electrode output terminal (171) both extend to the inner side of the busbar housing (110).
3. The bus capacitor according to claim 2, characterized in that: The busbar housing (110) comprises an outer edge shell (115), an inner edge shell (113) and a housing end plate (117); the shape of the housing end plate (117) is adapted to the shape of the capacitor rolled core package (130); the outer edge shell (115) is arranged on the outer edge of the housing end plate (117); the inner edge shell (113) is arranged on the inner edge of the housing end plate (117); the annular receiving groove (111) is formed between the outer edge shell (115) and the inner edge shell (113); and the capacitor rolled core package (130) is arranged between the outer edge shell (115) and the inner edge shell (113).
4. The bus capacitor according to claim 3, characterized in that: The inner edge casing (113) is also provided with a slot (119), and the positive output terminal (151) and the negative output terminal (171) both extend out of the annular accommodation groove through the slot (119).
5. The bus capacitor according to claim 3, characterized in that: The positive electrode connection row (150) comprises a positive electrode connection sheet (155) and a positive electrode output ring (157); the positive electrode connection sheet (155) is arranged between the shell end plate (117) and the capacitor core package (130), and is in electrical contact with a plurality of positive electrode tabs (131) at the same time; the positive electrode output ring (157) is arranged on the inner side of the positive electrode connection sheet (155) and protrudes toward the negative electrode connection row (170); the positive electrode output ring (157) is located between the capacitor core package (130) and the inner edge casing (113); the positive electrode output terminal (151) is arranged on the positive electrode output ring (157) and is bent inwardly and extends.
6. The bus capacitor according to claim 3, characterized in that: The negative electrode connection row (170) comprises a negative electrode connection sheet (175) and a negative electrode output ring (177); the negative electrode connection sheet (175) is arranged between the shell end plate (117) and the capacitor core package (130), and is in electrical contact with a plurality of negative electrode tabs (133) at the same time; the negative electrode output ring (177) is arranged on the inner side of the negative electrode connection sheet (175) and protrudes toward the positive electrode connection row (150); the negative electrode output ring (177) is located between the capacitor core package (130) and the inner edge casing (113); the negative electrode output terminal (171) is arranged on the negative electrode output ring (177) and is bent inwardly and extends.
7. The bus capacitor according to any one of claims 2 to 6, characterized in that: The busbar capacitor further comprises a Y capacitor (190); the outer side of the busbar housing (110) partially protrudes outward and forms a boss outer edge (120); and the Y capacitor (190) is arranged inside the boss outer edge (120).
8. The bus capacitor according to claim 7, characterized in that: A fixing seat (121) is also provided inside the outer edge (120) of the boss, and an input terminal (123) and a grounding terminal (125) are mounted on the fixing seat (121); the input terminal (123) is in electrical contact with one pole of the Y capacitor (190) and is in electrical contact with the positive input terminal (153) or the negative input terminal (173); and the grounding terminal (125) is in electrical contact with the other pole of the Y capacitor (190).
9. A motor controller (200), characterized in that: The invention comprises a control housing (210), a power component (230) and a busbar capacitor, wherein the power component (230) and the busbar capacitor are both accommodated in the control housing (210), the busbar capacitor comprises a busbar housing (110), a capacitor winding core package (130), a positive electrode connection row (150) and a negative electrode connection row (170), the busbar housing (110) is annular and has an annular receiving groove (111), the capacitor winding core package (130) is an annular monomer structure formed by one-time winding, and is assembled in the annular receiving groove (111), and one side of the capacitor winding core package (130) has a surface A plurality of positive pole tabs (131) are arranged at intervals on the surface, and a plurality of negative pole tabs (133) are arranged at intervals on the other side surface. The positive electrode connection bar (150) is arranged on one side of the capacitor rolled core package (130) and is electrically in contact with the plurality of positive pole tabs (131). The negative electrode connection bar (170) is arranged on the other side of the capacitor rolled core package (130) and is electrically in contact with the plurality of negative pole tabs (133). The power component (230) is arranged in the busbar housing (110) and is electrically connected to the positive electrode connection bar (150) and the negative electrode connection bar (170).
10. The motor controller (200) according to claim 9, characterized in that: The power assembly (230) comprises a plurality of power modules (231) and a heat sink (233); the plurality of power modules (231) are arranged on the periphery of the heat sink (233); a positive output terminal (151) is arranged on the inner side of the positive connection bar (150); a negative output terminal (171) is arranged on the inner side of the negative connection bar (170); the positive output terminal (151) and the negative output terminal (171) both extend to the inner side of the inner edge casing (113) of the busbar casing (110); and each of the power modules (231) is in electrical contact with both the positive output terminal (151) and the negative output terminal (171).
11. An electric drive assembly, characterized in that: The invention comprises a motor and a motor controller (200), wherein the motor controller (200) is arranged at the end of the motor, the motor controller (200) comprises a control housing (210), a power component (230) and a bus capacitor, wherein the power component (230) and the bus capacitor are both accommodated in the control housing (210), the bus capacitor comprises a bus housing (110), a capacitor winding core package (130), a positive electrode connection row (150) and a negative electrode connection row (170), the bus housing (110) is annular and has an annular receiving groove (111), the capacitor winding core package (130) is an annular monomer structure formed by one-time winding, and is assembled in the annular receiving groove. (111), a plurality of positive pole tabs (131) are spaced apart on one side surface of the capacitor rolled core package (130), and a plurality of negative pole tabs (133) are spaced apart on the other side surface; the positive electrode connection bar (150) is disposed on one side of the capacitor rolled core package (130) and is electrically in contact with the plurality of positive pole tabs (131); the negative electrode connection bar (170) is disposed on the other side of the capacitor rolled core package (130) and is electrically in contact with the plurality of negative pole tabs (133); the power component (230) is disposed in the busbar housing (110) and is electrically connected to the positive electrode connection bar (150) and the negative electrode connection bar (170).