CN222600752U - Bus capacitor, motor controller and electric drive assembly - Google Patents

Abstract

The utility model provides a bus capacitor, a motor controller and an electric drive assembly, which relate to the technical field of motor control, and the bus capacitor comprises a bus shell, a capacitor winding core bag, an anode connecting row and a cathode connecting row, wherein the annular bus shell is adopted to form an annular accommodating groove, the capacitor winding core bag is of an annular monomer structure formed by one-step winding, and the capacitor winding core bag is assembled in the annular accommodating groove, and meanwhile, a plurality of positive electrode lugs and a plurality of negative electrode lugs are respectively arranged on the surfaces of the two sides of the capacitor winding core bag, and the positive electrode connecting row and the negative electrode connecting row are respectively arranged on the two sides of the capacitor winding core bag and are respectively in electric contact with the positive electrode lugs and the negative electrode lugs. Compared with the prior art, the annular single capacitor winding core bag formed by one-step winding is lower in manufacturing process cost, better in consistency and more uniform in capacitor temperature. And the structure is simple and compact, the power density is high, and the low-noise inductance design is realized.

Description

Bus capacitor, motor controller and electric drive assembly

Technical Field

The utility model relates to the technical field of motor control, in particular to a bus capacitor, a motor controller and an electric drive assembly.

Background

The motor controller of the new energy automobile is a key component for converting the direct current of the power battery into the alternating current required by the three-phase motor, and the conversion process is called inversion in the technical field of power electronics. The core component for executing the inversion process is a high-frequency switching power semiconductor module such as IGBT, silicon carbide MOS and the like.

In the switching process of the semiconductor module, the front end of the inverter circuit topology of the motor controller also needs a bus capacitor to store energy and stabilize voltage, and the bus capacitor for the motor controller in the prior art is generally formed by connecting a plurality of coiled film capacitor core packages in parallel, so that the manufacturing process cost is high and the consistency is poor. And the bus capacitor for the existing motor controller is generally in a cuboid shape, the temperature of the capacitor core part is high, and the temperatures of a plurality of parallel core bags are uneven. In addition, the existing bus capacitor is generally welded and integrated through complex copper bars, and is complex in structure, low in power density and high in stray inductance.

Disclosure of utility model

The utility model aims to provide a bus capacitor, a motor controller and an electric drive assembly, which are compact and simple in structure, low in manufacturing process cost, good in consistency, uniform in temperature, high in power density and capable of realizing low stray inductance design, and complex copper bars are not needed to be welded and integrated.

Embodiments of the utility model may be implemented as follows:

In a first aspect, the utility model provides a bus capacitor, which comprises a bus shell, a capacitor winding core package, an anode connecting row and a cathode connecting row, wherein the bus shell is annular and is provided with an annular accommodating groove, the capacitor winding core package is of an annular single structure formed by one-time winding and is assembled in the annular accommodating groove, a plurality of anode lugs are distributed on one side surface of the capacitor winding core package at intervals, a plurality of cathode lugs are distributed on the other side surface of the capacitor winding core package at intervals, the anode connecting row is arranged on one side of the capacitor winding core package and is electrically contacted with a plurality of anode lugs, and the cathode connecting row is arranged on the other side of the capacitor winding core package and is electrically contacted with a plurality of cathode lugs.

In an alternative embodiment, the positive electrode connection row and the negative electrode connection row are annular and are accommodated in the annular accommodating groove, the positive electrode output terminal is arranged on the inner side of the positive electrode connection row, the positive electrode input terminal is arranged on the outer side of the positive electrode connection row, the negative electrode output terminal is arranged on the inner side of the negative electrode connection row, the negative electrode input terminal is arranged on the outer side of the negative electrode connection row, and the positive electrode output terminal and the negative electrode output terminal extend to the inner side of the inner edge enclosure.

In an alternative embodiment, the busbar housing includes an outer peripheral shell, an inner peripheral shell and a housing end plate, the shape of the housing end plate is adapted to the shape of the capacitor winding core package, the outer peripheral shell is disposed at the outer side edge of the housing end plate, the inner peripheral shell is disposed at the inner side edge of the housing end plate, the annular accommodating groove is formed between the outer peripheral shell and the inner peripheral shell, and the capacitor winding core package is disposed between the outer peripheral shell and the inner peripheral shell.

In an alternative embodiment, the inner peripheral shell is further provided with a clamping groove, and the positive output terminal and the negative output terminal extend out of the annular accommodating groove through the clamping groove.

In an alternative embodiment, the positive electrode connection row includes a positive electrode connection piece and a positive electrode output ring, the positive electrode connection piece is disposed between the shell end plate and the capacitor winding core pack and is simultaneously in electrical contact with a plurality of positive electrode lugs, the positive electrode output ring is disposed on the inner side of the positive electrode connection piece and protrudes towards the direction of the negative electrode connection row, the positive electrode output ring is disposed between the capacitor winding core pack and the inner edge enclosure, and the positive electrode output terminal is disposed on the positive electrode output ring and extends in an inward bending manner.

In an alternative embodiment, the negative electrode connection row includes a negative electrode connection piece and a negative electrode output ring, the negative electrode connection piece is disposed between the shell end plate and the capacitor winding core pack and is simultaneously in electrical contact with a plurality of negative electrode tabs, the negative electrode output ring is disposed on the inner side of the negative electrode connection piece and faces the direction of the positive electrode connection row to be convex, the negative electrode output ring is disposed between the capacitor winding core pack and the inner peripheral shell, and the negative electrode output terminal is disposed on the negative electrode output ring and is bent inwards to extend.

In an alternative embodiment, the busbar capacitance further comprises a Y capacitance, the outer side of the busbar housing is locally and outwards protruded and is formed with a boss outer edge, and the Y capacitance is arranged in the boss outer edge.

In an alternative embodiment, a fixing seat is further arranged in the outer edge of the boss, an input terminal and a grounding terminal are assembled on the fixing seat, the input terminal is electrically contacted with one pole of the Y capacitor and is electrically contacted with the positive electrode input terminal or the negative electrode input terminal, and the grounding terminal is electrically contacted with the other pole of the Y capacitor.

The utility model provides a motor controller, which comprises a control shell, a power component and a bus capacitor, wherein the power component and the bus capacitor are both accommodated in the control shell, the bus capacitor comprises a bus shell, a capacitor winding core bag, an anode connecting row and a cathode connecting row, the bus shell is annular and is provided with an annular accommodating groove, the capacitor winding core bag is of an annular single structure formed by one-step winding and is assembled in the annular accommodating groove, a plurality of anode lugs are distributed on one side surface of the capacitor winding core bag at intervals, a plurality of cathode lugs are distributed on the other side surface of the capacitor winding core bag at intervals, the anode connecting row is arranged on one side of the capacitor winding core bag and is electrically contacted with the anode lugs, the cathode connecting row is arranged on the other side of the capacitor winding core bag and is electrically contacted with the cathode lugs, and the power component is arranged in the bus shell and is electrically connected with the anode connecting row and the cathode connecting row.

In an alternative embodiment, the power assembly includes a plurality of power modules and a radiator, a plurality of power modules paste and establish the radiator periphery, the inboard of anodal connection row is provided with anodal output terminal, the inboard of negative pole connection row is provided with negative pole output terminal, anodal output terminal with negative pole output terminal all extends to the inboard of inner edge enclosure, every power module simultaneously with anodal output terminal with negative pole output terminal electrical contact.

In a third aspect, the utility model provides an electric drive assembly, which comprises a motor and a motor controller, wherein the motor controller is arranged at the end part of the motor, the motor controller comprises a control shell, a power component and a bus capacitor, the power component and the bus capacitor are both accommodated in the control shell, the bus capacitor comprises a bus shell, a capacitor winding core package, an anode connecting row and a cathode connecting row, the bus shell is annular and is provided with an annular accommodating groove, the capacitor winding core package is of an annular single structure formed by one-time winding and is assembled in the annular accommodating groove, a plurality of anode lugs are arranged on one side surface of the capacitor winding core package at intervals, a plurality of cathode lugs are arranged on the other side surface of the capacitor winding core package at intervals, the anode connecting row is arranged on one side of the capacitor winding core package and is electrically contacted with the anode lugs, the cathode connecting row is arranged on the other side of the capacitor winding core package and is electrically contacted with the cathode lugs, and the power component is arranged in the bus shell and is electrically connected with the cathode connecting row.

The beneficial effects of the embodiment of the utility model include, for example:

The utility model provides a bus capacitor, a motor controller and an electric drive assembly, wherein an annular accommodating groove is formed by adopting an annular bus shell, a capacitor winding core bag is of an annular single structure formed by one-time winding and is assembled in the annular accommodating groove, a plurality of positive pole lugs and a plurality of negative pole lugs are respectively arranged on the two side surfaces of the capacitor winding core bag, and a positive pole connecting row and a negative pole connecting row are respectively arranged on the two sides of the capacitor winding core bag and are respectively in electric contact with the positive pole lugs and the negative pole lugs. Compared with the prior art, the utility model avoids forming a bus capacitor after the thin film capacitor core bags are connected in parallel in the conventional technology by adopting the annular single capacitor winding core bag formed by one-step winding, and has lower manufacturing process cost and better consistency. And the annular bus capacitor is adopted, so that the capacitor temperature is more uniform due to the integrated design. In addition, the electrode lug connection is realized by directly arranging the positive electrode connection row and the negative electrode connection row on two sides of the capacitor, the welding integration of the complex copper bar structure is avoided, the structure is simple and compact, the power density is high, the distributed electrode lug is adopted, and the low-noise inductance design is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a bus capacitor according to a first embodiment of the present utility model;

Fig. 2 is a schematic diagram of an internal structure of a bus capacitor according to a first embodiment of the present utility model;

fig. 3 is an exploded view of a bus capacitor according to a first embodiment of the present utility model;

fig. 4 is a schematic cross-sectional structure of a bus capacitor according to a first embodiment of the present utility model;

FIG. 5 is an enlarged partial schematic view of V in FIG. 4;

FIG. 6 is an enlarged schematic view of a portion of VI of FIG. 4;

Fig. 7 is a schematic structural diagram of a motor controller according to a second embodiment of the present utility model;

fig. 8 is a schematic diagram of an assembly structure of the bus capacitor and the power assembly in fig. 7.

The icons are 100-bus capacitors, 110-bus housings, 111-annular accommodating grooves, 113-inner peripheral shells, 115-outer peripheral shells, 117-housing end plates, 119-clamping grooves, 120-boss outer edges, 121-fixing seats, 123-input terminals, 125-grounding terminals, 130-capacitor rolled core bags, 131-positive electrode lugs, 133-negative electrode lugs, 150-positive electrode connecting rows, 151-positive electrode output terminals, 153-positive electrode input terminals, 155-positive electrode connecting sheets, 157-positive electrode output rings, 170-negative electrode connecting rows, 171-negative electrode output terminals, 173-negative electrode input terminals, 175-negative electrode connecting sheets, 177-negative electrode output rings, 190-Y capacitors, 200-motor controllers, 210-control housings, 230-power components, 231-power modules and 233-heat sinks.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

As disclosed in the background art, the busbar capacitance of the prior art is generally formed by connecting a plurality of wound film capacitor core packages in parallel, and has the following disadvantages:

1. the manufacturing process has high cost and poor consistency.

2. The bus capacitor for the existing motor controller is generally in a cuboid shape, the temperature of a capacitor core part is high, and the temperatures of a plurality of parallel core bags are uneven.

3. The bus capacitor for the motor controller of the existing integrated filter capacitor is generally welded and integrated through complex copper bars, has a complex structure and low power density, and is difficult to realize low stray inductance design.

4. The copper bars electrically connected with the power module and the bus capacitor of the existing motor controller occupy valuable internal space, and the compactness is required to be improved.

In order to solve the problems, the utility model provides a novel bus capacitor, a motor controller and an electric drive assembly. It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

Referring to fig. 1 to 6, the present embodiment provides a bus capacitor 100, which has a compact and simple structure, low manufacturing process cost, good consistency, uniform temperature, no need of complex copper bars for welding integration, high power density and low stray inductance design.

The bus capacitor 100 provided in this embodiment includes a bus shell 110, a capacitor winding core package 130, an anode connection row 150, a cathode connection row 170 and a Y capacitor 190, where the bus shell 110 is annular and has an annular accommodating groove 111, the capacitor winding core package 130 is of an annular monomer structure formed by one-step winding and is assembled in the annular accommodating groove 111, a plurality of anode lugs 131 are distributed on one side surface of the capacitor winding core package 130 at intervals, a plurality of cathode lugs 133 are distributed on the other side surface at intervals, the anode connection row 150 is disposed on one side of the capacitor winding core package 130 and is electrically contacted with the anode lugs 131, and the cathode connection row 170 is disposed on the other side of the capacitor winding core package 130 and is electrically contacted with the cathode lugs 133. The outside of the busbar housing 110 is partially protruded outward and formed with a boss outer edge 120, and the y capacitor 190 is disposed in the boss outer edge 120.

In this embodiment, the Y capacitor 190 plays a role in filtering common-mode interference, and in this embodiment, by adopting the annular single capacitor rolled core package 130 formed by one-time rolling, the formation of the bus capacitor 100 after the parallel connection of the thin film capacitor core packages in the conventional technology is avoided, and the manufacturing process cost is lower and the consistency is better. And the annular bus capacitor 100 is adopted, so that the capacitor temperature is more uniform due to the integrated design. In addition, the electrode lug connection is realized by directly separately arranging the positive electrode connection row 150 and the negative electrode connection row 170 on two sides of the capacitor, the welding integration by adopting a complex copper bar structure is avoided, the structure is simple and compact, the power density is high, and the design of low-noise inductance is realized by adopting the distributed electrode lugs.

It should be noted that, the bus capacitor 100 in this embodiment is suitable for the motor controller 200 (shown in fig. 7 and 8), the motor controller 200 is disposed at an end portion of the motor, the bus capacitor 100 is in an annular structure as a whole, that is, the external bus shell 110 and the internal capacitor winding core package 130 are both in an annular structure, so that when the motor controller 200 is formed by assembling, the power module 231 and the radiator 233 can be assembled at a central position of the bus capacitor 100, thereby making the overall structure of the motor controller 200 more compact, and being beneficial to miniaturization of the motor controller 200.

It should be noted that, in this embodiment, after the capacitor winding core package 130, the positive electrode connection row 150 and the negative electrode connection row 170 are installed in place, a potting adhesive layer is further required in the bus bar housing 110 for integral sealing protection.

In some embodiments, the positive electrode connection row 150 and the negative electrode connection row 170 are both ring-shaped and accommodated in the ring-shaped accommodation groove, and the inside of the positive electrode connection row 150 is provided with the positive electrode output terminal 151, the outside of the positive electrode connection row 150 is provided with the positive electrode input terminal 153, the inside of the negative electrode connection row 170 is provided with the negative electrode output terminal 171, the outside of the negative electrode connection row 170 is provided with the negative electrode input terminal 173, and the positive electrode output terminal 151 and the negative electrode output terminal 171 both extend to the inside of the inner peripheral shell 113. Specifically, the positive electrode connection row 150 and the negative electrode connection row 170 are all disposed in the capacitor shell, wherein the positive electrode connection row 150 is located at the bottom of the annular accommodating groove, the negative electrode connection row 170 is located at the top of the annular accommodating groove, the positive electrode connection row 150 and the negative electrode connection row 170 are utilized to respectively realize the electric connection of the positive electrode tab 131 and the negative electrode tab 133 on the two side surfaces of the capacitor winding core package 130, and the input terminal 123 is disposed on the outer sides of the positive electrode connection row 150 and the negative electrode connection row 170, and the output terminal is disposed on the inner sides, so that the input and output structures are more reasonable, and a more compact structure can be realized during assembly.

The busbar housing 110 includes an outer peripheral shell 115, an inner peripheral shell 113 and a housing end plate 117, the shape of the housing end plate 117 is adapted to the shape of the capacitor winding core pack 130, the outer peripheral shell 115 is disposed at the outer side edge of the housing end plate 117, the inner peripheral shell 113 is disposed at the inner side edge of the housing end plate 117, an annular accommodating groove 111 is formed between the outer peripheral shell 115 and the inner peripheral shell 113, and the capacitor winding core pack 130 is disposed between the outer peripheral shell 115 and the inner peripheral shell 113. Specifically, the outer peripheral shell 115, the inner peripheral shell 113 and the outer shell end plate 117 are integrally formed by adopting an insulating material, the outer shell end plate 117 is also annular, and the inner peripheral shell 113 and the outer peripheral shell 115 are both cylindrical and are respectively fixed at the inner side edge and the outer side edge of the outer shell end plate 117. Limiting of the capacitor winding core pack 130 may be achieved by the inner and outer peripheral shells 113, 115. The heights of the inner edge enclosure 113 and the outer edge enclosure 115 relative to the shell end plate 117 may be the same, and the height may be greater than the height of the capacitor winding core packet 130 relative to the shell end plate 117, so that on one hand, the end face level of the bus capacitor 100 can be ensured, and on the other hand, the cladding assembly effect of the capacitor winding core packet 130 can be ensured, so that the bus shell 110 can achieve a better protection effect on the capacitor winding core packet 130.

In this embodiment, the number of the positive electrode output terminals 151 and the negative electrode output terminals 171 may be plural, for example, three, and the three positive electrode output terminals 151 and the three negative electrode output terminals 171 may be disposed close to each other, so that the three power modules 231 may be connected to the center of the bus capacitor 100 correspondingly, and the number of the positive electrode output terminals 151 and the negative electrode output terminals 171 is not particularly limited.

In some embodiments, the inner peripheral shell 113 is further provided with a clamping groove 119, and the positive output terminal 151 and the negative output terminal 171 extend out of the annular accommodating groove through the clamping groove 119. Specifically, the plurality of the clamping grooves 119 may be provided, and the positive electrode output terminal 151 and the negative electrode output terminal 171 respectively protrude out of the inner peripheral case 113 through the corresponding clamping grooves 119, thereby making electrical contact with the power module 231 inside the inner peripheral case 113. The shape and size of the clamping groove 119 may be determined according to the shape and size of the positive electrode output terminal 151 and the negative electrode output terminal 171.

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 disposed between the case end plate 117 and the capacitor winding core pack 130 and is simultaneously in electrical contact with the plurality of positive electrode tabs 131, the positive electrode output ring 157 is disposed on the inner side of the positive electrode connection sheet 155 and protrudes toward the direction of the negative electrode connection row, and the positive electrode output ring 157 is disposed between the capacitor winding core pack 130 and the inner peripheral case 113, and the positive electrode output terminal 151 is disposed on the positive electrode output ring 157 and extends by being bent inward. Specifically, the positive electrode connecting sheet 155 is of a thin copper sheet structure, the positive electrode output ring 157 is integrally arranged at the inner edge of the positive electrode connecting sheet 155, and the positive electrode output ring 157 is designed to facilitate the positive electrode output terminal 151 to be relatively close to the negative electrode connecting row 170, so that the positive electrode output terminal 151 and the negative electrode output terminal 171 are mutually close to each other, and on the other hand, the positive electrode output ring 157 can be inserted between the capacitor winding core bag 130 and the inner edge enclosure 113, so that the structure between the capacitor winding core bag 130 and the inner edge enclosure 113 is more compact, the fastening effect of the capacitor winding core bag 130 is better, and the gap looseness of the capacitor winding core bag is avoided.

In some embodiments, the negative electrode connection row 170 includes a negative electrode connection tab 175 and a negative electrode output ring 177, the negative electrode connection tab 175 is disposed between the housing end plate 117 and the capacitor winding core pack 130 and is in electrical contact with the plurality of negative electrode tabs 133 at the same time, the negative electrode output ring 177 is disposed inside the negative electrode connection tab 175 and protrudes toward the positive electrode connection row, and the negative electrode output ring 177 is disposed between the capacitor winding core pack 130 and the inner peripheral shell 113, and the negative electrode output terminal 171 is disposed on the negative electrode output ring 177 and extends bent inward. Specifically, the negative electrode connecting sheet 175 is of a thin copper sheet structure, the negative electrode output ring 177 is integrally arranged at the inner edge of the negative electrode connecting sheet 175, and the negative electrode output ring 177 is designed to facilitate the negative electrode output terminal 171 to be relatively close to the positive electrode connecting row 150, so that the positive electrode output terminal 151 and the negative electrode output terminal 171 are mutually close to each other, and on the other hand, the negative electrode output ring 177 can be inserted between the capacitor winding core bag 130 and the inner edge enclosure 113, so that the structure between the capacitor winding core bag 130 and the inner edge enclosure 113 is more compact, the fastening effect of the capacitor winding core bag 130 is better, and the gap looseness of the capacitor winding core bag is avoided.

Both sides of the capacitor winding core pack 130 are clamped by the positive electrode connecting piece 155 and the negative electrode connecting piece 175, and the positive electrode connecting piece 155 and the negative electrode connecting piece 175 are welded with the positive electrode tab 131 and the negative electrode tab 133 at both sides by a plurality of spot welds using laser. The wide and separate tabs and wide and thin tabs facilitate reducing stray inductance of the circular bus capacitor 100.

In some embodiments, a fixing seat 121 is further disposed in the boss outer edge 120, and an input terminal 123 and a ground terminal 125 are mounted on the fixing seat 121, where the input terminal 123 is electrically contacted with one pole of the Y capacitor 190 and is electrically contacted with the positive input terminal 153 or the negative input terminal 173, and the ground terminal 125 is electrically contacted with the other pole of the Y capacitor 190. Specifically, the fixing base 121 is a nut base, the input terminal 123 and the ground terminal 125 may be conductive screw structures, the side surface of the Y capacitor 190 abuts against the fixing base 121, and two capacitor sheet terminals are disposed on the side surface of the Y capacitor 190 and are respectively used for electrically contacting the ground terminal 125 and the input terminal 123.

It is noted that the number of Y capacitors 190 may be two, and the two Y capacitors 190 are a positive bus Y capacitor and a negative bus Y capacitor, respectively, and two capacitor tab terminals are disposed on the side of each Y capacitor 190. The number of the ground terminals 125 may be two, the positive bus Y capacitor ground terminal and the negative bus Y capacitor ground terminal may be in electrical contact with the capacitor sheet terminals on the two Y capacitors 190, the number of the input terminals 123 may be two, and the number of the input terminals 123 may be two, the input positive bus terminal and the input negative bus terminal, respectively. Specifically, the input positive bus terminal is electrically contacted with the positive input terminal 153 and the capacitor sheet terminal of the positive bus Y capacitor, the input negative bus terminal is electrically contacted with the negative input terminal 173 and the capacitor sheet terminal of the negative bus Y capacitor, the positive bus Y capacitor ground terminal is electrically contacted with the other capacitor sheet terminal of the positive bus Y capacitor, and the negative bus Y capacitor ground terminal is electrically contacted with the other capacitor sheet terminal of the positive bus Y capacitor.

In summary, this embodiment provides a bus capacitor 100, a motor controller 200 and an electric drive assembly, in which an annular bus housing 110 is adopted to form an annular accommodating groove 111, a capacitor winding core package 130 is of an annular monomer structure formed by one-step winding and is assembled in the annular accommodating groove 111, meanwhile, a plurality of positive electrode tabs 131 and a plurality of negative electrode tabs 133 are respectively arranged on two side surfaces of the capacitor winding core package 130, and a positive electrode connection row 150 and a negative electrode connection row 170 are respectively arranged on two sides of the capacitor winding core package 130 and are respectively in electrical contact with the plurality of positive electrode tabs 131 and the plurality of negative electrode tabs 133. In this embodiment, the annular single capacitor rolled core package 130 formed by one-step rolling is adopted, so that the formation of the bus capacitor 100 after the parallel connection of the thin film capacitor core packages in the conventional technology is avoided, the manufacturing process cost is lower, and the consistency is better. And the annular bus capacitor 100 is adopted, so that the capacitor temperature is more uniform due to the integrated design. In addition, the electrode lug connection is realized by directly separately arranging the positive electrode connection row 150 and the negative electrode connection row 170 on two sides of the capacitor, the welding integration by adopting a complex copper bar structure is avoided, the structure is simple and compact, the power density is high, and the design of low-noise inductance is realized by adopting the distributed electrode lugs.

Referring to fig. 7 and 8 in combination, the present embodiment provides a motor controller 200, including a control housing 210, a power assembly 230 and a bus capacitor 100, wherein the basic structure and principle of the bus capacitor 100 and the technical effects thereof are the same as those of the above embodiment of the bus capacitor 100, and for brevity, reference may be made to the corresponding contents of the above embodiment of the bus capacitor 100.

In some embodiments, the motor controller 200 includes a control housing 210, a power component 230, and a bus capacitor 100, where the power component 230 and the bus capacitor 100 are all 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 accommodating groove 111, the capacitor winding core package 130 is of an annular single structure formed by one-step winding and is assembled in the annular accommodating groove 111, a plurality of positive electrode tabs 131 are disposed on one side surface of the capacitor winding core package 130 at intervals, a plurality of negative electrode tabs 133 are disposed on the other side surface of the capacitor winding core package 130 at intervals, the positive electrode connection row 150 is disposed on one side of the capacitor winding core package 130 and is electrically contacted with the plurality of positive electrode tabs 131, the negative electrode connection row 170 is disposed on the other side of the capacitor winding core package 130 and is electrically contacted with the plurality of negative electrode tabs 133, and the power component 230 is disposed in the bus housing 110 and is electrically connected with the positive electrode connection row 150 and the negative electrode connection row 170.

In some embodiments, the power assembly 230 includes a plurality of power modules 231 and a heat sink 233, the plurality of power modules 231 are attached to the periphery of the heat sink 233, the positive electrode output terminal 151 is disposed on the inner side of the positive electrode connection row 150, the negative electrode output terminal 171 is disposed on the inner side of the negative electrode connection row 170, the positive electrode output terminal 151 and the negative electrode output terminal 171 each extend to the inner side of the inner peripheral shell 113, and each power module 231 is simultaneously in electrical contact with the positive electrode output terminal 151 and the negative electrode output terminal 171.

It should be noted that, in the present embodiment, the power module 231 and the heat sink 233 may be integrally disposed at the center of the ring-shaped bus capacitor 100, so as to shorten the distance between the terminal of the power module 231 and the output terminal of the capacitor, and reduce the stray inductance of the electrical connection between the power module 231 and the bus capacitor 100. Meanwhile, the bus capacitor 100 and the power module 231 are compactly installed and integrated, and the power density of the motor controller 200 is improved.

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 thereof are the same as those of the embodiment of the motor controller 200, and for brevity, reference may be made to the corresponding contents of the embodiment of the motor controller 200.

The electric drive assembly provided in this embodiment includes a motor and a motor controller 200, the motor controller 200 is disposed at an 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 winding core package 130, an anode connection row 150 and a cathode connection row 170, the bus housing 110 is annular and has an annular accommodating groove 111, the capacitor winding core package 130 is of an annular monomer structure formed by one-step winding and is assembled in the annular accommodating groove 111, a plurality of anode lugs 131 are disposed on one side surface of the capacitor winding core package 130 at intervals, a plurality of cathode lugs 133 are disposed on the other side surface of the capacitor winding core package 130 at intervals, the anode connection row 150 is disposed on one side of the capacitor winding core package 130 and is electrically contacted with the anode lugs 131, the cathode connection row 170 is disposed on the other side of the capacitor winding core package 130 and is electrically contacted with the cathode lugs 133, and the power component 230 is disposed in the bus housing 110 and is electrically connected with the anode connection row 150 and the cathode connection row 170.

In some embodiments, the control housing 210 is provided at an end of the motor, thereby enabling the motor and the motor controller 200 to be integrally mounted and reducing the overall size.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (11)

1. The utility model provides a busbar electric capacity, its characterized in that includes busbar shell (110), electric capacity roll up core package (130), anodal connection row (150) and negative pole connection row (170), busbar shell (110) are annular and have annular holding tank (111), electric capacity roll up core package (130) for the annular monomer structure of once winding shaping to assemble in annular holding tank (111), electric capacity roll up one side surface interval distribution of core package (130) and be provided with a plurality of anodal utmost point ear (131), opposite side surface interval distribution is provided with a plurality of negative pole utmost point ear (133), anodal connection row (150) set up one side of electric capacity roll up core package (130) and with a plurality of anodal utmost point ear (131) electrical contact, negative pole connection row (170) set up the opposite side of electric capacity roll up core package (130) and with a plurality of negative pole utmost point ear (133) electrical contact.

2. The bus capacitor according to claim 1, wherein the positive electrode connection row (150) and the negative electrode connection row (170) are both annular and are accommodated in the annular accommodating groove, and the inner side of the positive electrode connection row (150) is provided with a positive electrode output terminal (151), the outer side of the positive electrode connection row (150) is provided with a positive electrode input terminal (153), the inner side of the negative electrode connection row (170) is provided with a negative electrode output terminal (171), the outer side of the negative electrode connection row (170) is provided with a negative electrode input terminal (173), and the positive electrode output terminal (151) and the negative electrode output terminal (171) are both extended to the inner side of the bus case (110).

3. The bus bar capacitor according to claim 2, wherein the bus bar housing (110) comprises an outer edge enclosure (115), an inner edge enclosure (113) and a housing end plate (117), the shape of the housing end plate (117) is adapted to the shape of the capacitor winding core package (130), the outer edge enclosure (115) is arranged at the outer side edge of the housing end plate (117), the inner edge enclosure (113) is arranged at the inner side edge of the housing end plate (117), the annular accommodating groove (111) is formed between the outer edge enclosure (115) and the inner edge enclosure (113), and the capacitor winding core package (130) is arranged between the outer edge enclosure (115) and the inner edge enclosure (113).

4. A busbar capacitor according to claim 3, wherein the inner peripheral shell (113) is further provided with a clamping groove (119), and the positive output terminal (151) and the negative output terminal (171) extend out of the annular accommodating groove through the clamping groove (119).

5. A busbar capacitance according to claim 3, wherein the positive connection row (150) includes a positive connection piece (155) and a positive output ring (157), the positive connection piece (155) is disposed between the case end plate (117) and the capacitance winding core pack (130) and is simultaneously in electrical contact with a plurality of the positive tabs (131), the positive output ring (157) is disposed inside the positive connection piece (155) and protrudes toward the negative connection row (170), and the positive output ring (157) is disposed between the capacitance winding core pack (130) and the inner peripheral shell (113), and the positive output terminal (151) is disposed on the positive output ring (157) and extends with being bent inward.

6. A busbar capacitance according to claim 3, wherein 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 disposed between the housing end plate (117) and the capacitance winding core pack (130) and is simultaneously in electrical contact with a plurality of the negative electrode tabs (133), the negative electrode output ring (177) is disposed inside the negative electrode connection sheet (175) and protrudes toward the positive electrode connection row (150), and the negative electrode output ring (177) is disposed between the capacitance winding core pack (130) and the inner peripheral shell (113), and the negative electrode output terminal (171) is disposed on the negative electrode output ring (177) and extends with being bent inward.

7. The busbar capacitance according to any one of claims 2 to 6, further comprising a Y-capacitor (190), wherein an outer side of the busbar housing (110) is partially protruded outward and formed with a boss outer edge (120), and the Y-capacitor (190) is disposed within the boss outer edge (120).

8. The bus capacitor according to claim 7, wherein a fixing seat (121) is further disposed in the outer edge (120) of the boss, an input terminal (123) and a ground terminal (125) are mounted on the fixing seat (121), the input terminal (123) is electrically contacted with one pole of the Y capacitor (190) and is electrically contacted with the positive input terminal (153) or the negative input terminal (173), and the ground terminal (125) is electrically contacted with the other pole of the Y capacitor (190).

9. The utility model provides a motor controller (200), its characterized in that includes control shell (210), power module (230) and bus capacitor, power module (230) with bus capacitor all holds in control shell (210), bus capacitor includes bus shell (110), electric capacity volume core package (130), anodal connection row (150) and negative pole connection row (170), bus shell (110) are annular and have annular holding tank (111), electric capacity volume core package (130) are the annular monomer structure of one-time winding shaping, and assemble in annular holding tank (111), electric capacity volume core package (130) one side surface interval distribution is provided with a plurality of anodal lugs (131), and opposite side surface interval distribution is provided with a plurality of negative pole lugs (133), anodal connection row (150) set up one side of electric capacity volume core package (130) and with a plurality of anodal lug (131) electrical contact, negative pole connection row (170) set up electric capacity volume core package (130)'s opposite side, and with a plurality of anodal lugs (131) electrical contact, negative pole connection row (170) are in electric capacity volume core package (130) and connection row (170).

10. The motor controller (200) according to claim 9, wherein the power assembly (230) includes a plurality of power modules (231) and a heat sink (233), a plurality of the power modules (231) are attached to the periphery of the heat sink (233), a positive output terminal (151) is provided on the inner side of the positive connection row (150), a negative output terminal (171) is provided on the inner side of the negative connection row (170), and the positive output terminal (151) and the negative output terminal (171) each extend to the inner side of an inner peripheral shell (113) of the busbar housing (110), and each of the power modules (231) is simultaneously in electrical contact with the positive output terminal (151) and the negative output terminal (171).

11. The utility model provides an electric drive assembly, characterized by includes motor and motor controller (200), motor controller (200) set up in the tip of motor, motor controller (200) include control shell (210), power module (230) and bus capacitor, power module (230) with bus capacitor all holds in control shell (210), bus capacitor includes bus shell (110), electric capacity roll up core package (130), anodal connection row (150) and negative pole connection row (170), bus shell (110) are the annular and have annular holding tank (111), electric capacity roll up core package (130) be the annular monomer structure of once winding shaping, and assemble in annular holding tank (111), electric capacity roll up core package (130) one side surface interval distribution is provided with a plurality of pole lugs (131), and opposite side surface interval distribution is provided with a plurality of negative pole lugs (133), anodal connection row (150) set up in one side of electric capacity roll up core package anodal (130) and with a plurality of pole lugs (131) are connected, electric capacity roll up core (170) are connected in electric capacity package (130) the opposite side, electric capacity package (130) are contacted, and is electrically connected to the positive electrode connection row (150) and the negative electrode connection row (170).