High-integration-level filter capacitor assembly

Abstract

The utility model discloses a filter capacitor assembly with high integration level, which comprises a shell module, a thin film capacitor module and a filter capacitor module, the thin film capacitor module and the filter capacitor module are both installed on the shell module, and the shell module comprises a tray and a shielding plate. The tray is provided with a thin-film capacitor placing area and a filter capacitor placing area, a shielding plate slot part is arranged between the thin-film capacitor placing area and the filter capacitor placing area, the bottom of the tray is provided with a plurality of limiting columns, and the side part of the tray is provided with a plurality of groove parts. According to the high-integration-level filter capacitor assembly disclosed by the utility model, the thin-film capacitor module and the filter capacitor module are not provided with plastic shells and are directly fixed on the aluminum shell through resin encapsulation by adopting bare cores, and the thin-film capacitor copper bar and the filter capacitor copper bar are welded by adopting laser, so that screw materials and nailing avoidance space are saved; and the nailing rhythm of a production line is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter capacitor assembly technical field, concretely relates to a kind of high-integration filter capacitor assembly. BACKGROUND

[0002] The common film capacitor and filter arrangement on the market, film capacitor and filter are packaged separately, and assembled together on the production line of controller assembly and aluminum shell. The film capacitor copper bar and core are filled in the plastic shell by epoxy resin, the plastic shell has four legs, and is fixed on the aluminum shell by screws. The filter copper bar is injection molded in the plastic shell, and the filter capacitor and magnetic ring are fixed in the plastic groove by glue dispensing or glue filling, the filter shell has five legs, and is fixed on the aluminum shell by screws; X capacitor and Y capacitor are selected from the common finished products on the market. Paste heat-conducting pad on the aluminum shell for heat dissipation of film capacitor and filter copper bar. A EMC barrier is designed on the main shell to separate film capacitor and filter, and realize the function of electromagnetic shielding.

[0003] Film capacitor and filter need to be fixed on the aluminum shell by screws, film capacitor is usually fixed by four M6 screws, filter is usually fixed by five M4 screws, and two M5 screws are needed to realize electrical connection between film capacitor copper bar and filter copper bar, a total of eleven screws, increase production line beat. Considering electrical clearance and assembly clearance, each screw occupies about φ15 space. Considering product demolding, electrical clearance and installation clearance, the electromagnetic shielding barrier on the aluminum shell needs about 10mm width space, and the space utilization rate is very low. The heat of film capacitor and filter copper bar can only be indirectly dissipated from the shell through the form of bottom pasted heat-conducting pad, and the heat dissipation efficiency is low, which limits the current capacity of the product.

[0004] Therefore, the above problems are further improved. INVENTION CONTENTS

[0005] The main purpose of the utility model is to provide a kind of high-integration filter capacitor assembly, film capacitor module and filter capacitor module cancel plastic shell, and are fixed by resin filling on aluminum shell directly using bare core, film capacitor copper bar and filter capacitor copper bar are laser welded, save 11 screw materials and punch space, save production line punch beat;EMC shielding plate is integrated inside, simultaneously realize the grounding of Y capacitor and the function of shielding barrier, save 10mm width space simultaneously;The heat of film capacitor module and filter capacitor module is transferred to shell by filling glue, and then cooled by cooling liquid under IGBT, and the cooling effect is obviously better than that of copper bar local heat dissipation pad;Enhance the vibration resistance of capacitor and filter.

[0006] In order to achieve the above object, the utility model provides a kind of high-integration degree filter capacitor assembly, including shell module, film capacitor module and filter capacitor module, the film capacitor module and the filter capacitor module are installed in the shell module, wherein:

[0007] The shell module includes a tray and an (EMC) shield plate. The tray is provided with a film capacitor placement area and a filter capacitor placement area. A shield plate slot is provided between the film capacitor placement area and the filter capacitor placement area. The bottom of the tray is provided with a plurality of limiting columns, and the side of the tray is provided with a plurality of recessed portions. The shield plate slot includes a jack and a limiting piece. The shield plate is inserted into the jack and used to isolate the film capacitor placement area and the filter capacitor placement area. The shield plate is provided with a clamping groove and a plurality of limiting holes. The limiting piece is installed in the clamping groove, and the limiting column is installed in the limiting hole.

[0008] The film capacitor module is installed in the film capacitor placement area, and the film capacitor module includes a film capacitor positive copper bar, a film capacitor negative copper bar and a film capacitor. The film capacitor is connected to the film capacitor positive copper bar and the film capacitor negative copper bar, respectively.

[0009] The filter capacitor module is installed in the filter capacitor placement area, and the filter capacitor module includes a filter capacitor positive copper bar, a filter capacitor negative copper bar and a filter capacitor (including an X capacitor and a Y capacitor). The filter capacitor is connected to the filter capacitor positive copper bar and the filter capacitor negative copper bar, respectively. The filter capacitor positive copper bar is connected to the film capacitor positive copper bar, and the filter capacitor negative copper bar is connected to the film capacitor negative copper bar.

[0010] As a further preferred technical solution of the above technical solution, the shell module further includes an (aluminum) housing. The tray is installed in the housing. The housing is provided with a plurality of installation protrusions. The installation protrusions are one-to-one corresponding to the recessed portions.

[0011] As a further preferred technical solution of the above technical solution, the bottom of the shield plate is attached to the inner side of the housing. The bottom of the shield plate is provided with a soldering leg. The soldering leg is connected to the filter capacitor (Y capacitor).

[0012] As a further preferred technical solution of the above technical solution, the filter capacitor module further includes a magnetic ring. The magnetic ring is sleeved on the filter capacitor positive copper bar and the filter capacitor negative copper bar.

[0013] As a further preferred technical solution of the above technical solution, an insulating paper is provided between the film capacitor positive copper bar and the film capacitor negative copper bar, and between the filter capacitor positive copper bar and the filter capacitor negative copper bar.

[0014] As a further preferred technical solution of the above technical solution, for the filter capacitor module, the filter capacitor is filled into the shell module by a bare core. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the utility model.

[0016] Figure 2 is a structural schematic diagram of the utility model (shell hidden).

[0017] Figure 3 is a structural schematic diagram of the tray of the utility model.

[0018] Figure 4 is a structural schematic diagram of the tray of the utility model.

[0019] Figure 5 is a structural schematic diagram of the utility model (tray hidden).

[0020] Figure 6 is a structural schematic diagram of the utility model (tray hidden).

[0021] Figure 7 is a structural schematic diagram of the shielding plate of the utility model.

[0022] The reference signs include: 100, shell module;110, tray;111, thin film capacitor placement area;112, filter capacitor placement area;113, shielding plate slot part;1131, jack;1132, limiting piece;114, limiting column;115, recessed groove part;120, shielding plate;121, clamping groove part;122, limiting hole;123, solder leg;130, shell;131, installation convex strip;200, thin film capacitor module;210, thin film capacitor positive pole copper bar;220, thin film capacitor negative pole copper bar;230, thin film capacitor;300, filter capacitor module;310, filter capacitor positive pole copper bar;320, filter capacitor negative pole copper bar;330, filter capacitor;340, magnetic ring;350, insulating paper. DETAILED DESCRIPTION

[0023] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious variants can be conceived by those skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, variant schemes, improved schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0024] The utility model discloses a high integration degree filter capacitor assembly, below combining preferred embodiment, to the specific embodiment of utility model make further description.

[0025] In the embodiment of the utility model, the person skilled in the art pays attention, the IGBT and X / Y capacitor etc.

[0026] Preferred embodiment.

[0027] As Figures 1-7 The utility model discloses a high integration degree filter capacitor assembly, including shell module 100, film capacitor module 200 and filter capacitor module 300, film capacitor module 200 with filter capacitor module 300 all install in shell module 100, wherein:

[0028] Shell module 100 includes tray 110 and (EMC) shield plate 120, tray 110 is equipped with film capacitor placement area 111 and filter capacitor placement area 112, and is equipped with shield plate slot part 113 between film capacitor placement area 111 with filter capacitor placement area 112, the bottom of tray 110 is equipped with a plurality of limit post 114 and the side of tray 110 is equipped with a plurality of recess part 115, shield plate slot part 113 includes jack 1131 and limiting piece 1132, shield plate 120 inserts jack 1131 and is used to isolate film capacitor placement area 111 with filter capacitor placement area 112, shield plate 120 is equipped with clamping groove part 121 and a plurality of limit hole 122, limiting piece 1132 installs in clamping groove part 121 and limit post 114 installs in limit hole 122,

[0029] Film capacitor module 200 installs in film capacitor placement area 111 and film capacitor module 200 includes film capacitor positive pole copper bar 210, film capacitor negative pole copper bar 220 and film capacitor 230, film capacitor 230 is connected with film capacitor positive pole copper bar 210 and film capacitor negative pole copper bar 220 respectively,

[0030] Filter capacitor module 300 installs in filter capacitor placement area 112 and filter capacitor module 300 includes filter capacitor positive pole copper bar 310, filter capacitor negative pole copper bar 320 and filter capacitor 330 (including X capacitor and Y capacitor), filter capacitor 330 is connected with filter capacitor positive pole copper bar 310 and filter capacitor negative pole copper bar 320 respectively, filter capacitor positive pole copper bar 310 is connected with film capacitor positive pole copper bar 210 and filter capacitor negative pole copper bar 320 is connected with film capacitor negative pole copper bar 220.

[0031] Specifically, the shell module 100 further comprises an (aluminum) shell 130, the tray 110 is mounted on the shell 130, the shell 130 is provided with a plurality of mounting protrusions 131, and the mounting protrusions 131 are correspondingly mounted on the groove portions 115.

[0032] More specifically, the bottom of the shielding plate 120 is attached to the inner side of the shell 130, and the bottom of the shielding plate 130 is provided with a soldering leg 123 connected with the filter capacitor 330 (Y capacitor).

[0033] Further, the filter capacitor module 330 further comprises a magnetic ring 340 sleeved on the filter capacitor positive copper bar 310 and the filter capacitor negative copper bar 320, and the magnetic ring can be selected from nanocrystals or ferrite.

[0034] Still further, the thin film capacitor positive copper bar 210 and the thin film capacitor negative copper bar 220, and the filter capacitor positive copper bar 310 and the filter capacitor negative copper bar 320 are all provided with insulating paper 350 (for preventing electrical risk).

[0035] Preferably, for the filter capacitor module 300, the filter capacitor 330 is filled into the shell module 100 in a bare core manner.

[0036] For the utility model:

[0037] The plastic shell of the thin film capacitor module and the filter capacitor module is removed, and is directly filled and fixed on the aluminum shell.

[0038] The thin film capacitor module cancels the plastic shell, and after the copper bar and the core are welded, is placed on the plastic tray, the plastic tray is placed in the groove of the aluminum shell, and is filled and fixed and insulated by using epoxy resin;

[0039] The filter capacitor module cancels the plastic shell, the copper bar cancels the plastic wrapping, the filter capacitor core, the magnetic ring and the copper bar are previously placed on the plastic tray, are welded into an integrated whole, and are directly placed in the shell and filled and fixed and insulated by using resin;

[0040] The plastic tray is provided with a positioning pin at the bottom, and is used for positioning on the shell.

[0041] The plastic tray is provided with a plurality of hollow windows at the bottom, and is used for avoiding welding of the filter capacitor core and the copper bar.

[0042] The pin copper bar is previously welded on the side surface of the copper bar, and is provided with a pincer-shaped structure for welding with the filter capacitor core.

[0043] The X capacitor and the Y capacitor cancel the shell, and are directly welded with the core and the pin copper bar.

[0044] The plastic tray is designed with a clamping hole, and the shielding plate is inserted into the plastic tray from below to separate the film capacitor and the filter capacitor;

[0045] The bottom of the shielding plate is designed with a plurality of welding pins, which are welded with Y capacitors, and the other side is in contact with the aluminum shell to realize the grounding function of the Y capacitors.

[0046] The plastic tray is designed with a "concave" groove structure, and the aluminum shell is designed with a "convex" mounting convex strip, which are matched with each other to prevent resin from overflowing to other areas.

[0047] The beneficial effects of the utility model lie in:

[0048] The film capacitor module and the filter capacitor module cancel the plastic shell, and are directly poured and fixed on the aluminum shell, saving 2 sets of plastic molds;

[0049] 11 screw materials are saved, and the production line reduces the nailing rhythm;

[0050] The filter capacitor and the magnetic core save the dispensing process, and reduce the investment of dispensing equipment;

[0051] The film capacitor and the filter capacitor do not need to be fixed by the support, and the space of the screw is saved, the thickness of the EMC shielding plate is only 1mm, the integrated filter is poured, the width space is reduced, and the overall width size is shortened by about 35mm;

[0052] The heat of the film capacitor and the filter (i.e. the filter capacitor module) is transmitted to the shell through the pouring glue, and then is radiated through the cooling liquid below the IGBT, and the cooling effect is obviously better than that of the copper bar locally using the heat-conducting pad for heat dissipation, the capacitance of the film capacitor can be reduced, and the cross-sectional area of the filter copper bar can also be reduced;

[0053] The anti-vibration ability of the film capacitor and the filter is enhanced, and the vibration level is improved.

[0054] The X capacitor and the Y capacitor cancel the plastic shell, and can be flexibly changed in shape according to the space without being limited by the existing product specifications in the market.

[0055] It is worth mentioning that the IGBT and X / Y capacitor and other technical features involved in the utility model patent application should be regarded as prior art, the specific structure, working principle and possible control mode, space arrangement mode of these technical features can be selected by using the conventional selection in the field, and should not be regarded as the invention point of the utility model patent, and the utility model patent will not be further expanded and described in detail.

[0056] Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-integration filter capacitor assembly, characterized by, The shell module, the film capacitor module and the filter capacitor module are installed in the shell module, wherein: The shell module comprises a tray and a shielding plate, the tray is provided with a film capacitor placement area and a filter capacitor placement area, a shielding plate slot part is arranged between the film capacitor placement area and the filter capacitor placement area, the bottom of the tray is provided with a plurality of limiting columns and the side of the tray is provided with a plurality of groove parts, the shielding plate slot part comprises a socket and a limiting part; the shielding plate is inserted into the socket and used for isolating the film capacitor placement area and the filter capacitor placement area, the shielding plate is provided with a clamping groove part and a plurality of limiting holes, the limiting part is installed in the clamping groove part and the limiting column is installed in the limiting hole; The film capacitor module is installed in the film capacitor placement area and comprises a film capacitor positive copper bar, a film capacitor negative copper bar and a film capacitor, the film capacitor is connected with the film capacitor positive copper bar and the film capacitor negative copper bar respectively; The filter capacitor module is installed in the filter capacitor placement area and comprises a filter capacitor positive copper bar, a filter capacitor negative copper bar and a filter capacitor, the filter capacitor is connected with the filter capacitor positive copper bar and the filter capacitor negative copper bar respectively; the filter capacitor positive copper bar is connected with the film capacitor positive copper bar and the filter capacitor negative copper bar is connected with the film capacitor negative copper bar.

2. A high-integration filter capacitor assembly according to claim 1, wherein The shell module further comprises a shell, the tray is installed in the shell, the shell is provided with a plurality of installation convex strips, the installation convex strips are one-to-one corresponding to the groove parts.

3. A high-integration filter capacitor assembly according to claim 2, wherein The bottom of the shielding plate is attached to the inner side of the shell, the bottom of the shielding plate is provided with a solder leg, the solder leg is connected with the filter capacitor.

4. The high-integration filter capacitor assembly according to claim 1, wherein The filter capacitor module further comprises a magnetic ring, the magnetic ring is sleeved on the filter capacitor positive copper bar and the filter capacitor negative copper bar.

5. The high-integration filter capacitor assembly according to claim 1, wherein Insulating paper is arranged between the film capacitor positive copper bar and the film capacitor negative copper bar and between the filter capacitor positive copper bar and the filter capacitor negative copper bar.

6. The high-integration filter capacitor assembly according to claim 1, wherein For the filter capacitor module, the filter capacitor is filled into the shell module with a bare core.

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