CN-224204979-U - Integrated DC filter capacitor power module

CN224204979UCN 224204979 UCN224204979 UCN 224204979UCN-224204979-U

Abstract

The utility model relates to an integrated direct current filter capacitor power module which comprises a shell, a capacitor core group, a first polarity terminal, a second polarity terminal, a first IGBT busbar, a second IGBT busbar, a first parallel conducting sheet, a second parallel conducting sheet and epoxy resin, wherein an opening is formed in the shell, the capacitor core group, the first parallel conducting sheet, the second parallel conducting sheet, the inner end of the first polarity terminal, the inner end of the second polarity terminal, the inner end of the first IGBT busbar and the inner end of the second IGBT busbar are arranged in the shell through the opening, and the opening is encapsulated by the epoxy resin. The utility model integrates the capacitor core group, the first polar terminal, the second polar terminal, the first IGBT busbar, the second IGBT busbar, the first parallel conducting strip and the second parallel conducting strip on the shell, and then encapsulates the capacitor core group, the first polar terminal, the second polar terminal, the first IGBT busbar, the second IGBT busbar, the first parallel conducting strip and the second parallel conducting strip by epoxy resin.

Inventors

LI RUIJIANG
LI GUOQIANG
PAN DAN

Assignees

成都宏宇博瀚电子有限公司

Dates

Publication Date: 20260505
Application Date: 20250403

Claims (10)

1. The utility model provides an integration direct current filter capacitor power module, which comprises an outer shell, the electric capacity core group, first polarity terminal, the second polarity terminal, first IGBT busbar, the second IGBT busbar, first parallel conducting strip, second parallel conducting strip and epoxy, be equipped with the opening on the shell, electric capacity core group, first parallel conducting strip, the inner of second parallel conducting strip, the inner of first polarity terminal, the inner of second polarity terminal, the inner of first IGBT busbar and the inner of second IGBT busbar are packed into the shell from this opening, epoxy encapsulates this opening, first parallel conducting strip pastes and locates the one side of electric capacity core group, the second parallel conducting strip pastes and locates the another side of electric capacity core group, the electric capacity core group is by the parallel arrangement of a plurality of electric capacity cores, the one end of a plurality of electric capacities is connected in parallel to first parallel conducting strip, the other end of a plurality of electric capacity cores is connected in parallel to the second parallel conducting strip, the inner of first IGBT busbar, the inner of second IGBT busbar is connected with first parallel conducting strip respectively, the inner of second parallel conducting strip, the inner of first polarity terminal, the inner of second polarity terminal is connected with the second parallel conducting strip respectively.
2. The integrated direct current filter capacitor power module of claim 1, wherein the first IGBT busbar and the second IGBT busbar are arranged in pairs, and the outer ends of the first IGBT busbar and the outer ends of the second IGBT busbar are arranged side by side.
3. The integrated direct current filter capacitor power module of claim 1, wherein a plurality of first IGBT polarity terminals are arranged at outer ends of the first IGBT busbar, a plurality of second IGBT polarity terminals are arranged at positions of the outer ends of the second IGBT busbar corresponding to the plurality of first IGBT polarity terminals, and the first IGBT polarity terminals and the second IGBT polarity terminals are in one-to-one correspondence.
4. The integrated direct current filter capacitor power module of claim 1, wherein the housing is provided with a heat dissipation structure, the heat dissipation structure is integrally arranged with the housing or attached to a plane of the housing, and the heat dissipation structure is a heat dissipation tooth group or a heat dissipation fin group.
5. The integrated dc filter capacitor power module of claim 1 wherein the capacitor core assembly, the first parallel conductive sheet and the second parallel conductive sheet are together wrapped with an insulating material, the insulating material being mica paper or aramid fiber paper or fiberglass or carbon fiber or heat shrink.
6. The integrated direct current filter capacitor power module of claim 1, comprising at least two first IGBT busbar and at least two second IGBT busbar, wherein the opening is rectangular, the first polarity terminal and the second polarity terminal are respectively located at a first side edge and a second side edge of the opening, at least one pair of the first IGBT busbar and the second IGBT busbar are located at a third side edge of the opening, and at least one pair of the first IGBT busbar and the second IGBT busbar are located at a fourth side edge of the opening.
7. The integrated dc filter capacitor power module of claim 1 or 6, wherein the first IGBT busbar, the first parallel conductive sheet, and the first polarity terminal are integrally provided, and the second IGBT busbar, the second parallel conductive sheet, and the second polarity terminal are integrally provided.
8. The integrated dc filter capacitor power module of claim 1, wherein the first IGBT busbar and the second IGBT busbar are vertically disposed at a middle position of the opening, and the first polarity terminal and the second polarity terminal are disposed at a side edge of the opening.
9. The integrated direct current filter capacitor power module of claim 1, wherein the opening is formed in an end face with a smaller area of the housing, only one first IGBT busbar and one second IGBT busbar are arranged at the opening, the first IGBT busbar and the second IGBT busbar are arranged at a first side edge of the opening, and the first polarity terminal and the second polarity terminal are arranged at a second side edge of the opening.
10. The integrated direct-current filter capacitor power module of claim 1, wherein the capacitor core is prepared into a cylindrical shape or a flat shape by adopting a metallized film through a winding process, the metallized film is formed by performing plasma roughening treatment on PS or PP or EPN or PET or PEN or PPS or PEEKK or PI or PEEKK or PTFE or PEI or PMI, and then performing metallization evaporation, an evaporation metal layer is arranged on the metallized film, the evaporation metal layer comprises a non-thickening region, a transition region and a thickening region, the transition region is positioned between the non-thickening region and the thickening region, the width range of the thickening region is 3-5mm, the range of the square resistance is 1-4 omega, the width range of the transition region is 6-30mm, the range of the square resistance is 10-20 omega, the range of the square resistance of the non-thickening region is 15-60 omega, and the evaporation metal layer is one or more materials of aluminum, copper, zinc or silver are compounded or a multi-layer material structure.

Description

Integrated DC filter capacitor power module Technical Field The utility model relates to the technical field of filter capacitor power modules, in particular to an integrated direct current filter capacitor power module. Background With the development demands of low carbon, energy conservation and cost reduction in recent years, the application of high-power supplies as heating, smelting, melting, welding, UPS power supplies, photovoltaic inverters, energy storage and the like is gradually increasing. At present, the power of a high-power supply is gradually increased to 100kW or even more than 500kW from original 5 kW-25 kW. The capacitor is used as an indispensable filtering key component in a circuit, and plays a vital role in the fields of induction heating, electron beam welding, photovoltaic inverters and the like. Because the capacitor can generate heat under the action of high-frequency ripple current, the current industry generally adopts the following straight filter capacitor device as a filter device, as shown in fig. 1, the straight filter capacitor device comprises a plurality of cylindrical aluminum shell capacitors a and a composite busbar c, the plurality of cylindrical aluminum shell capacitors are connected in parallel on the composite busbar c, and the direct current filter device has the following defects that 1, each cylindrical aluminum shell capacitor a is arranged on the composite busbar c one by one, the bottom of the composite busbar is required to be provided with a bottom plate b, the straight filter capacitor device is inconvenient to install, the time for manual installation is long, and the cost is gradually increased under the background that the labor cost is increased year by year. 2, in addition, the capacitor device of the direct filter capacitor device is difficult to replace and is inconvenient to maintain. 3. And two adjacent cylindrical aluminum shells are ventilated and radiated by a certain distance, so that the radiating effect is poor. Therefore, the structure of the existing direct filter capacitor device needs to be further improved. Disclosure of utility model The utility model aims to provide an integrated direct current filter capacitor power module which is integrated in structure, convenient to install and low in cost. The utility model can meet the application requirements of convenient installation and maintenance, high through-flow capacity, high heat dissipation capacity, low comprehensive cost and high comprehensive performance. The purpose of the utility model is realized in the following way: The utility model provides an integration direct current filter capacitor power module, which comprises an outer shell, the electric capacity core group, first polarity terminal, the second polarity terminal, first IGBT busbar, the second IGBT busbar, first parallel conducting strip, second parallel conducting strip and epoxy, be equipped with the opening on the shell, electric capacity core group, first parallel conducting strip, the inner of second parallel conducting strip, the inner of first polarity terminal, the inner of second polarity terminal, the inner of first IGBT busbar and the inner of second IGBT busbar are packed into the shell from this opening, epoxy encapsulates this opening, first parallel conducting strip pastes and locates the one side of electric capacity core group, the second parallel conducting strip pastes and locates the another side of electric capacity core group, the electric capacity core group is by the parallel arrangement of a plurality of electric capacity cores, the one end of a plurality of electric capacities is connected in parallel to first parallel conducting strip, the other end of a plurality of electric capacity cores is connected in parallel to the second parallel conducting strip, the inner of first IGBT busbar, the inner of second IGBT busbar is connected with first parallel conducting strip respectively, the inner of second parallel conducting strip, the inner of first polarity terminal, the inner of second polarity terminal is connected with the second parallel conducting strip respectively. The utility model integrates the capacitor core group, the first polar terminal, the second polar terminal, the first IGBT busbar, the second IGBT busbar, the first parallel conducting strip and the second parallel conducting strip on the shell, and then encapsulates the capacitor core group, the first polar terminal, the second polar terminal, the first IGBT busbar, the second IGBT busbar, the first parallel conducting strip and the second parallel conducting strip by epoxy resin. The present utility model can be further improved as follows. As a further scheme, the first IGBT busbar and the second IGBT busbar are arranged in pairs, and the outer ends of the first IGBT busbar and the outer ends of the second IGBT busbar are arranged side by side. As a further scheme, the outer end of the first IGBT busbar is provided with