Y capacitor and motor controller
By combining a multi-pin capacitor core, a metal casing with mounting holes, and potting compound, the problems of inconvenient installation, poor heat dissipation, and high ESL and ESR of Y capacitors in motor controllers are solved, achieving high-performance EMC filtering and heat dissipation.
Patent Information
- Application Number
- CN202423287662.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing Y capacitors are inconvenient to install in motor controllers, have poor heat dissipation, and have high ESL and ESR, which cannot effectively improve EMC filtering performance.
It adopts a combination structure of multi-pin capacitor core, metal shell with mounting holes and potting compound. The capacitor core is placed in the metal shell, the negative lead is soldered to the metal shell, the potting compound fills the gaps, and the insulating frame can be made of plastic to enhance insulation and heat dissipation.
This technology enables convenient installation and fixation of Y capacitors, significantly reduces ESL and ESR, improves EMC filtering and heat dissipation performance, and enhances stability and vibration resistance.
Smart Images
Figure CN223665311U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile parts, specifically, relates to Y capacitor and motor controller. BACKGROUND
[0002] In the motor controller of pure electric car, hybrid car and the like, Y capacitor (a kind of safety capacitor) is configured. The structure of current Y capacitor is that capacitor core is placed in plastic shell, and two long pins are led out on capacitor core.
[0003] The disadvantages of current Y capacitor are as follows: inconvenient installation, needing to separately design plastic part to fix Y capacitor;Ineffective heat dissipation, needing to separately design heat dissipation boss and heat dissipation gasket to dissipate heat;ESL (Equivalent Series Inductance) and ESR (Equivalent Series Resistance) are large, and filtering effect cannot reach expectation.
[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. INVENTION CONTENTS
[0005] The utility model provides a kind of high-performance Y capacitor and the motor controller configured with the Y capacitor of the utility model, the Y capacitor of the utility model is easy to install and fix, can realize self heat dissipation, and ESL and ESR are lower, realize the EMC (Electromagnetic Compatibility) filtering performance of Y capacitor is promoted, while, Y capacitor is easy to install and fix and the heat dissipation performance is excellent.
[0006] According to one aspect of the utility model, a Y capacitor is provided, comprising: a capacitor core;A metal shell, the capacitor core is placed in the metal shell and is gap-fitted with the metal shell, and a mounting hole is provided on the outer side of the metal shell;Potting glue is located in the metal shell, and fills the gap between the capacitor core and the metal shell;A positive electrode pin is led out from the middle region of the capacitor core;At least one negative electrode pin is led out from the edge region of the capacitor core and is welded on the metal shell.
[0007] In some embodiments, the Y capacitor further comprises: an insulating frame placed in the metal shell and gap-fitted with the metal shell;Wherein, the capacitor core is placed in the insulating frame and gap-fitted with the insulating frame, and the potting glue fills the gaps between the capacitor core and the insulating frame and the insulating frame and the metal shell, respectively.
[0008] In some embodiments, the insulating frame is a full-enclosed structure or a hollow structure; and / or, the insulating frame is a plastic frame.
[0009] In some embodiments, the outer side of the metal shell is provided with a plurality of mounting holes.
[0010] In some embodiments, the heights of the mounting holes of the plurality of Y capacitors are not equal; and the heights of the mounting holes of adjacent Y capacitors are stacked.
[0011] In some embodiments, the Y capacitors include a plurality of Y capacitors, and adjacent Y capacitors share a mounting hole; or the Y capacitors include a plurality of Y capacitors, and adjacent Y capacitors share a part of the surface of the metal shell.
[0012] In some embodiments, the metal shell is higher than the capacitor core, and the negative electrode pin is welded at the higher part of the metal shell.
[0013] In some embodiments, the metal shell is square or cylindrical in shape.
[0014] In some embodiments, the metal shell is an aluminum shell; and / or, the potting glue is an epoxy resin glue.
[0015] According to another aspect of the present application, a motor controller is provided, which is configured with the Y capacitor according to any of the above embodiments.
[0016] The present application has at least the following beneficial effects compared with the prior art:
[0017] The capacitor core is provided with a positive electrode pin and at least one negative electrode pin, preferably a plurality of negative electrode pins, thus forming a multi-pin capacitor core, which can achieve ultra-low ESL and ESR under the premise of ensuring normal safety electrical clearance and creepage requirements. The positive electrode pin is led out from the middle region of the capacitor core, and the negative electrode pin is led out from the edge region of the capacitor core, achieving a reasonable layout; and the negative electrode pin is welded on the metal shell as a ground pin.
[0018] The capacitor core is placed in the metal shell, which has high strength and can ensure that the Y capacitor is not damaged due to mechanical vibration, improving the stability of the Y capacitor. The outer side of the metal shell is provided with mounting holes, facilitating the installation and fixation of the Y capacitor. The capacitor core and the metal shell are filled with potting glue, which can be made of suitable materials such as epoxy resin glue, to effectively dissipate heat from the capacitor core and improve the overall anti-vibration and moisture-proof performance of the Y capacitor.
[0019] Thus, the utility model discloses a plurality of pin capacitor core, with mounting hole's metal shell and pouring sealant cooperate, form super high performance Y capacitor, its installation is fixed convenient, can realize self heat dissipation, and ESL and ESR are lower, realize the EMC filter performance of promotion Y capacitor simultaneously, make Y capacitor easy to install fixed and the heat dissipation performance is excellent.
[0020] The Y capacitor of the utility model is suitable for the motor controller of pure electric vehicles, hybrid vehicles and other vehicle types, and can effectively improve the working performance of the motor controller.
[0021] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0022] The drawings incorporated into the specification and forming a part thereof show, illustrate embodiments in accordance with the present utility model, and together with the specification, serve to explain the principle of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0023] Figure 1 The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in an embodiment of the utility model, as shown in the figure:
[0024] Figure 2 The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure: Figure 1
[0025] Figure 3 The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure:
[0026] Figure 4 The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure: Figure 3
[0027] The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure: Figure 5
[0028] The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure: Figure 6
[0029] The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure: Figure 7 Figure 6 The utility model discloses a kind of sectional view structural schematic diagram of Y capacitor in another embodiment of the utility model, as shown in the figure: DETAILED DESCRIPTION
[0030] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein. Rather, these implementations are provided as non-limiting examples, so that this disclosure will fully convey the scope of the application to those skilled in the art.
[0031] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.
[0032] In the description of the present application, the terms "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, in the description of the present application, when it is said that a certain device is "connected" to another device, it not only includes the case of direct connection, but also includes the case of indirect connection through other elements.
[0033] It should be noted that the features of the embodiments of the present application and different embodiments can be combined with each other without conflict.
[0034] Figure 1 And Figure 2 The structure of a Y capacitor in an embodiment of the present application is shown, wherein Figure 1 The cross-sectional structure of the Y capacitor is shown, Figure 2 The top view structure of the Y capacitor is shown; in combination with Figure 1 And Figure 2 The Y capacitor provided by the embodiment of the present application comprises:
[0035] The capacitor core 10;
[0036] The metal shell 20, the capacitor core 10 is placed in the metal shell 20 and gap fits with the metal shell 20, the outside of the metal shell 20 is provided with a mounting hole 22;
[0037] The potting glue 30 is located in the metal shell 20, and fills the gap between the capacitor core 10 and the metal shell 20;
[0038] The positive electrode pin 11 is led out from the middle region of the capacitor core 10;
[0039] At least one negative electrode pin 12 is led out from the edge region of the capacitor core 10 and welded on the metal shell 20.
[0040] The capacitor core 10 is provided with a positive electrode pin 11 and at least one negative electrode pin 12, preferably including a plurality of negative electrode pins 12, thus forming a multi-pin capacitor core 10, which can realize ultra-low ESL and ESR under the premise of ensuring normal safety electrical clearance and creepage requirements.
[0041] The capacitor core 10 is placed in the metal shell 20, which has high strength and can ensure that the Y capacitor will not be damaged due to mechanical vibration, thereby improving the stability of the Y capacitor.
[0042] The capacitor core 10 and the metal shell 20 are filled with potting glue 30, which can be made of epoxy resin glue or other suitable materials to effectively dissipate heat from the capacitor core 10 and improve the overall anti-vibration and moisture-proof performance of the Y capacitor.
[0043] Therefore, the Y capacitor with the multi-pin capacitor core 10, the metal shell 20 with mounting holes 22 and the potting glue 30 cooperates to form an ultra-high performance Y capacitor, which is easy to install and fix, can realize self-heat dissipation, has low ESL and ESR, and can improve the EMC filtering performance of the Y capacitor while making the Y capacitor easy to install and fix and having excellent heat dissipation performance.
[0044] Under the same conditions, the ESL of the Y capacitor of the present application is 14.3nH, while the ESL of the traditional Y capacitor is 23.6nH, and the ESL of the Y capacitor of the present application can be reduced by 65%. Under the same conditions, the ESR of the Y capacitor of the present application is 5mΩ, while the ESL of the traditional Y capacitor is 21.8mΩ, and the ESR of the Y capacitor of the present application can be reduced by 4.36 times. Under the same conditions (ambient temperature 65℃), the temp of the Y capacitor of the present application is 98.1℃, while the temp of the traditional Y capacitor is 122℃, and the heat dissipation performance of the Y capacitor of the present application can be improved by 72%.
[0045] The Y capacitor of the present application is suitable for motor controllers of pure electric vehicles, hybrid vehicles and other vehicle models, and can effectively improve the working performance of the motor controller.
[0046] continuously Figure 1 and Figure 2 As shown in the figure, in some embodiments, the Y capacitor further comprises: an insulating frame 40, which is arranged in the metal shell 20 and is in gap cooperation with the metal shell 20; wherein the capacitor core 10 is arranged in the insulating frame 40 and is in gap cooperation with the insulating frame 40, and the gap between the capacitor core 10 and the insulating frame 40 and the gap between the insulating frame 40 and the metal shell 20 are filled with the potting glue 30 respectively.
[0047] The insulating frame 40 can wrap the capacitor core 10 and realize the insulation of the capacitor core 10 and the metal shell 20 and the aluminum shell. The gap among the capacitor core 10, the insulating frame 40 and the metal shell 20 is filled with the potting glue 30, which can effectively dissipate heat of the capacitor core 10 and improve the anti-vibration and moisture-proof performance of the Y capacitor as a whole. In this way, the Y capacitor of the utility model forms a structure in cooperation of the multi-pin capacitor core 10, the insulating frame 40, the metal shell 20 with the mounting hole 22 and the potting glue 30, and has super high performance.
[0048] According to design needs, the insulating frame 40 can be a full-enclosing structure or a hollow structure. The material of the insulating frame 40 can be plastic to realize the insulation of the capacitor core 10 and the metal shell 20.
[0049] If the insulating frame 40 is not arranged, the insulation distance between the capacitor core 10 and the metal shell 20 can be ensured by a tooling and then the glue is poured, so that the cost can be saved and the heat dissipation performance can be further improved.
[0050] Figure 3 and Figure 4 The structure of another Y capacitor in the embodiment of the utility model is shown, wherein Figure 3 The cross-sectional structure of the Y capacitor is shown, Figure 4 The cross-sectional structure of the assembly of two Y capacitors is shown. In combination Figure 3 and Figure 4 As shown in the figure, in some embodiments, the outer side of the metal shell 20 is provided with a plurality of mounting holes 22, and the heights of the plurality of mounting holes 22 are not equal; the Y capacitor comprises a plurality of, wherein the mounting holes 22 with unequal heights of adjacent Y capacitors are superposed.
[0051] In some motor controllers and other products, a plurality of Y capacitors are needed. In the embodiment, the heights of the plurality of mounting holes 22 on the outer side of the metal shell 20 are set to be not equal, so that when a plurality of Y capacitors are needed to be configured, the mounting holes 22 with unequal heights of adjacent Y capacitors can be superposed, which facilitates the arrangement of the plurality of Y capacitors, saves space and facilitates installation.
[0052] Figure 3 and Figure 4 in combination with Figure 1and Figure 2 The same reference signs refer to the same structures, and thus repeated descriptions are omitted.
[0053] Figure 5 Fig. 4 shows a top view of another Y capacitor assembly according to an embodiment of the present application. Figure 5 As shown in Figs. 1-3, in some embodiments, the Y capacitor includes a plurality of Y capacitors, and adjacent Y capacitors share the mounting hole 22.
[0054] In the embodiment, the metal shells 20 of adjacent Y capacitors can be connected into one body, so as to facilitate the adjacent Y capacitors to share the mounting hole 22, thereby facilitating installation and fixation and saving mounting screws.
[0055] Figure 5 In the embodiment, the metal shells 20 of adjacent Y capacitors can be connected into one body, so as to facilitate the adjacent Y capacitors to share the mounting hole 22, thereby facilitating installation and fixation and saving mounting screws. Figure 1 and Figure 2 The same reference signs refer to the same structures, and thus repeated descriptions are omitted.
[0056] Figure 6 and Figure 7 Fig. 4 shows a top view of another Y capacitor assembly according to an embodiment of the present application. Figure 6 Fig. 4 shows a top view of another Y capacitor assembly according to an embodiment of the present application. Figure 7 Fig. 4 shows a top view of another Y capacitor assembly according to an embodiment of the present application. Figure 6 and Figure 7 As shown in Figs. 1-3, in some embodiments, the Y capacitor includes a plurality of Y capacitors, and adjacent Y capacitors share the mounting hole 22.
[0057] Figure 6 and Figure 7 In the embodiment, the metal shells 20 of adjacent Y capacitors can be connected into one body, so as to facilitate the adjacent Y capacitors to share the mounting hole 22, thereby facilitating installation and fixation and saving mounting screws. Figure 1 and Figure 2 The same reference signs refer to the same structures, and thus repeated descriptions are omitted.
[0058] As shown in Figs. 1-3, in some embodiments, the Y capacitor includes a plurality of Y capacitors, and adjacent Y capacitors share the mounting hole 22. Figure 1 , Figure 3 , Figure 6 In the above embodiments, the metal shell 20 is higher than the capacitor core 10, and the negative electrode pin 12 is welded at the higher position of the metal shell 20.
[0059] Further, in the above embodiments, the shape of the metal shell 20 can be square or cylindrical, and can be flexibly adjusted according to design requirements; the material of the metal shell 20 can be aluminum shell.
[0060] The utility model embodiment further provides a kind of motor controller, and the motor controller is configured with the Y capacitor described as any embodiment above.The Y capacitor of the utility model is suitable for the motor controller of pure electric car, hybrid car and other vehicle types, and can effectively improve the working performance of motor controller.
[0061] The above is a further detailed description of the utility model in conjunction with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions.For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can also be made, which should be considered as falling within the scope of protection of the utility model.
Claims
1. A Y capacitor characterized in that, The Y capacitor comprises: a capacitor core; a metal shell, wherein the capacitor core is arranged in the metal shell in a gap-fitting manner, and an outer side of the metal shell is provided with a mounting hole; potting glue, which is arranged in the metal shell and fills the gap between the capacitor core and the metal shell; a positive electrode pin, which is led out from a middle region of the capacitor core; and at least one negative electrode pin, which is led out from an edge region of the capacitor core and is welded on the metal shell.
2. The Y-capacitor of claim 1, wherein, The Y capacitor further comprises: an insulating frame, which is arranged in the metal shell in a gap-fitting manner; wherein the capacitor core is arranged in the insulating frame in a gap-fitting manner, and the potting glue fills the gaps between the capacitor core and the insulating frame and between the insulating frame and the metal shell, respectively.
3. The Y-capacitor of claim 2, wherein, The insulating frame is a full-enclosing structure or a hollow structure; and / or the insulating frame is a plastic frame.
4. The Y-capacitor of claim 1, wherein, An outer side of the metal shell is provided with a plurality of mounting holes.
5. The Y-capacitor of claim 4, wherein, The heights of the plurality of mounting holes are not equal. The Y capacitor comprises a plurality of Y capacitors, wherein the mounting holes with unequal heights of adjacent Y capacitors are superposed.
6. The Y-capacitor of claim 4, wherein, The Y capacitor comprises a plurality of Y capacitors, wherein adjacent Y capacitors share a mounting hole; or The Y capacitor comprises a plurality of Y capacitors, wherein adjacent Y capacitors share a part of a surface of the metal shell.
7. The Y-capacitor of claim 1, wherein, The metal shell is higher than the capacitor core, and the negative electrode pin is welded on the higher part of the metal shell.
8. The Y-capacitor of claim 1, wherein, The metal shell is square or cylindrical in shape.
9. The Y-capacitor of claim 1, wherein, The metal shell is an aluminum shell; and / or the potting glue is epoxy resin glue.
10. An electric machine controller characterized by The motor controller is configured with the Y capacitor as claimed in any one of claims 1-9.