CN118969422A - A film capacitor with integrated online detection EMC and BOOST boost function - Google Patents
A film capacitor with integrated online detection EMC and BOOST boost function Download PDFInfo
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- CN118969422A CN118969422A CN202411442342.9A CN202411442342A CN118969422A CN 118969422 A CN118969422 A CN 118969422A CN 202411442342 A CN202411442342 A CN 202411442342A CN 118969422 A CN118969422 A CN 118969422A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 97
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 109
- 229910052802 copper Inorganic materials 0.000 claims abstract description 107
- 239000010949 copper Substances 0.000 claims abstract description 107
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 26
- 239000010409 thin film Substances 0.000 claims abstract description 25
- 229920005591 polysilicon Polymers 0.000 claims abstract description 20
- 238000013461 design Methods 0.000 claims description 23
- 239000010408 film Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000005672 electromagnetic field Effects 0.000 description 7
- 238000003475 lamination Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/006—Thin film resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/06—Electrostatic or electromagnetic shielding arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/18—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material comprising a plurality of layers stacked between terminals
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a thin film capacitor integrating on-line detection type EMC and BOOST functions, and belongs to the technical field of capacitors. The utility model provides a thin film capacitor of integrated on-line measuring formula EMC and BOOST BOOST function, includes casing and sets up a plurality of group's capacitor core inside the casing, still includes: the positive electrode copper bar and the negative electrode copper bar are electrically connected with the capacitor core, and are designed as laminated busbar; polysilicon magnetic rings wrapped on the positive electrode copper bar and the negative electrode copper bar; the Y2 capacitor group is electrically connected with the positive electrode copper bar and the negative electrode copper bar, and the Y2 capacitor group and the polysilicon magnetic ring form an LC passive filter; the invention can filter electromagnetic interference which is transmitted by a battery, a motor, an electric control circuit and the like through a power line and other circuit signal lines at high and low frequencies, and simultaneously tests whether the filtered data meets the standard requirements.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to a thin film capacitor integrating on-line detection type EMC and BOOST functions.
Background
The film capacitor has the function of BOOST boosting in the motor controller, and the BOOST boosting module is formed by an inductor L, a switching device K and a diode D in the circuit topology, so that the voltage of the battery B can be boosted from V0 to nV0 and applied to a load R. When the switch K is closed, the current flowing through the inductor L increases, the electricity is converted into magnetism and stored in the inductor, when the switch K is opened, the magnetism is converted into electricity instantaneously, high voltage can appear at two ends of the inductor, the current is released from the inductor and flows to the output capacitor C through the diode D, if the current of the inductor L increases linearly at a certain ratio, the discharging path of the inductor only charges the output capacitor in the diode direction, the voltage of the output capacitor rises after a plurality of switching cycles, and the output voltage rises from V0 to nV0.
Film capacitors with BOOST function are typically used in topologies where a lower battery voltage (e.g., 300VDC-500 VDC) needs to be boosted to a high voltage (e.g., 700VDC-900 VDC) by an electric vehicle motor controller.
The EMC test mainly comprises two aspects, namely an electromagnetic interference test, a radiation test (electromagnetic wave radiated to the outside by test equipment) and a conduction test (electromagnetic interference conducted by the test equipment through a power line or a signal line), and an electromagnetic immunity test, such as the tolerance of the test equipment to electrostatic discharge, the tolerance to fast transient pulse, the tolerance to surge voltage and the like.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a thin film capacitor integrating on-line detection type EMC and BOOST functions.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
Including casing and a plurality of groups of capacitor core of setting inside the casing, still include: the positive electrode copper bar and the negative electrode copper bar are electrically connected with the capacitor core, and are designed as laminated busbar; polysilicon magnetic rings wrapped on the positive electrode copper bar and the negative electrode copper bar; the Y2 capacitor group is electrically connected with the positive electrode copper bar and the negative electrode copper bar, and the Y2 capacitor group and the polysilicon magnetic ring form an LC passive filter; the inductance between the positive electrode copper bar, the negative electrode copper bar and the polysilicon magnetic ring is as follows:
wherein, -Inductance value
-Permeability in vacuum, 4 pi x 10 −7 henry/m
-Relative permeability of magnetic ring
Equivalent number of turns of busbar
Cross-sectional area of busbar
Average length of busbar.
Preferably, the method further comprises: and the integrated wiring harness is electrically connected with the Y2 capacitor bank, the positive electrode copper bar and the negative electrode copper bar.
Preferably, an insulating film is arranged between the positive electrode copper bar and the negative electrode copper bar.
Preferably, the positive electrode copper bar and the negative electrode copper bar are low stray inductance wave-shaped laminated busbar designs, and comprise two or more wave laminates penetrating through the polysilicon magnetic ring.
Preferably, the wavy lamination formed by the positive electrode copper bar and the negative electrode copper bar is a triangular wavy line.
Preferably, the wavy lamination formed by the positive electrode copper bar and the negative electrode copper bar is a smooth semicircular wavy line.
Preferably, the wavy lamination formed by the positive electrode copper bar and the negative electrode copper bar is a trapezoid wavy line.
Further, the positive electrode copper bar and the negative electrode copper bar in the wave-shaped laminated shape comprise two or more wave lamination layers penetrating through the polysilicon magnetic ring, wherein the wave lamination layers at two ends are big waves, the wave lamination layers at the middle part are small waves, and the wave height relation between the big waves and the small waves is as follows:
Wherein: high ratio of large wave to small wave
-Wave height of big waves
-Wave height of small waves
-The rate of increase of the ratio of the height of the large waves to the height of the small waves, the range of values: 0.1-0.12
When the number of the middle small waves is 0, the ratio of the height of the big waves to the height of the waves in a certain reference is taken as the value: 1
-Number of small waves in the middle.
Preferably, the capacitor core in the shell is filled with epoxy resin or polyurethane, and the film capacitor is vacuum-packaged.
Compared with the prior art, the invention provides the film capacitor integrating the on-line detection type EMC and BOOST functions, which has the following beneficial effects:
1. the thin film capacitor integrating the on-line detection type EMC and BOOST boosting functions forms an LC passive filter through the Y2 capacitor bank and the polysilicon magnetic ring, and the inductor and the capacitor are connected in series, so that primary (3, 5 and 7) harmonic waves can be filtered.
2. The thin film capacitor integrating the on-line detection type EMC and BOOST boosting functions comprises two or more wave laminated layers penetrating through a polysilicon magnetic ring through the low stray inductance wave laminated busbar design of the positive electrode copper bar and the negative electrode copper bar, so that the overlapping surface is as large as possible, and the effect of mutually canceling the noise of positive and negative electrode signals on a direct current busbar is achieved.
3. This integrated on-line measuring formula EMC and BOOST function's film capacitor through being connected to anodal copper bar and negative pole copper bar with integrated pencil one end, the other end is connected to EMC integrated tester, and when the capacitor carried on the motor controller power-on during operation, EMC integrated tester can draw the noise signal on the capacitor bus, real-time supervision electromagnetic compatibility effect, and this function can realize the system debugging of product development stage and the EMC real-time supervision of market application stage.
The thin film capacitor integrated with the on-line detection type EMC and BOOST boosting functions has the same or can be realized by adopting the prior art, the invention can filter electromagnetic interference which is transmitted by a battery, a motor, an electric control circuit and the like through a power line and other circuit signal lines at high and low frequencies, and simultaneously test whether the filtered data meets the standard requirements.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a thin film capacitor integrated with on-line detection type EMC and BOOST functions according to the present invention;
fig. 2 is a schematic diagram of the internal structure of a thin film capacitor integrated with on-line detection type EMC and BOOST functions according to the present invention;
fig. 3 is a schematic diagram of the internal structure of a thin film capacitor integrated with on-line detection type EMC and BOOST functions according to the present invention;
Fig. 4 is a schematic structural diagram of a polysilicon magnetic ring part of a thin film capacitor integrated with on-line detection type EMC and BOOST functions according to the present invention;
Fig. 5 is a schematic structural diagram of a positive copper bar and a negative copper bar of a thin film capacitor integrated with on-line detection type EMC and BOOST functions;
FIG. 6 is a schematic diagram of a part A of the film capacitor of FIG. 5 with integrated on-line detection type EMC and BOOST functions;
Fig. 7 is a schematic structural diagram II of a positive copper bar and a negative copper bar of a thin film capacitor integrated with on-line detection type EMC and BOOST functions;
fig. 8 is a schematic diagram III of the structure of a positive copper bar and a negative copper bar of a thin film capacitor integrated with on-line detection type EMC and BOOST functions;
Fig. 9 is a schematic diagram of a structure of a positive copper bar and a negative copper bar of a thin film capacitor integrated with on-line detection type EMC and BOOST functions;
FIG. 10 shows a thin film capacitor integrated with on-line detection EMC and BOOST functions according to the present invention;
fig. 11 is a circuit topology diagram of the inside of a thin film capacitor integrated with on-line detection type EMC and BOOST functions according to the present invention.
In the figure: 1. a housing; 2. integrating the wire harness; 3. a polysilicon magnetic ring; 4. a positive copper bar; 5. a negative copper bar; 6. a capacitor core; 7. y2 capacitor group; 8. an insulating film.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 11, comprising a case 1 and a plurality of sets of capacitor cores 6 provided inside the case 1, further comprising: the positive electrode copper bar 4 and the negative electrode copper bar 5 are electrically connected with the capacitor core 6, and the positive electrode copper bar 4 and the negative electrode copper bar 5 are designed as laminated busbar; a polysilicon magnetic ring 3 wrapped on the positive copper bar 4 and the negative copper bar 5; the Y2 capacitor group 7 is electrically connected with the positive electrode copper bar 4 and the negative electrode copper bar 5, and the Y2 capacitor group 7 and the polysilicon magnetic ring 3 form an LC passive filter; the inductance between the positive electrode copper bar 4 and the negative electrode copper bar 5 and the polysilicon magnetic ring 3 is as follows:
wherein, -Inductance value
-Permeability in vacuum, 4 pi x 10 −7 henry/m
-Relative permeability of magnetic ring
Equivalent number of turns of busbar
Cross-sectional area of busbar
Average length of busbar.
In the invention, an EMC (electromagnetic compatibility) filter module is integrated in the film capacitor and is realized by two parts, namely an LC filter consisting of two groups of Y2 capacitors and a polysilicon magnetic ring 3, and the other part is designed in a laminated busbar with low stray inductance of a positive busbar and a negative busbar of a direct current busbar, so that the surface of the film capacitor is overlapped and passes through the magnetic ring, the noise of positive and negative signals on the busbar can be mutually counteracted, and when the capacitor is carried on a motor controller to work when the capacitor is electrified, the noise transmitted and radiated by a battery, a motor, an electric control and the like can be filtered by the EMC filter module, so that the requirements of national standards are met;
The Y2 capacitor group 7 comprises two groups of Y2 capacitors, wherein the two groups of Y2 capacitors are connected in series, and each group of Y2 capacitors comprises two Y2 capacitors connected in parallel;
Through calculating the inductance between the positive electrode copper bar 4 and the negative electrode copper bar 5 and the polycrystalline silicon magnetic ring 3, the noise of the positive electrode signal and the negative electrode signal can be evaluated to cancel each other out the effect and the filtering effect, and the functional adjustment and the operation stability maintenance of the film capacitor can be realized by adjusting the current and the voltage in real time.
Referring to fig. 1 to 11, further comprising: the integrated wiring harness 2 is electrically connected with the Y2 capacitor bank 7, the positive electrode copper bar 4 and the negative electrode copper bar 5; an insulating film 8 is arranged between the positive electrode copper bar 4 and the negative electrode copper bar 5.
In the invention, the integrated wiring harness 2 is an integrated voltage acquisition wiring harness, one end of the wiring harness is connected to the anode and cathode of a bus (namely, the anode copper bar 4 and the cathode copper bar 5), the other end of the wiring harness is connected to the EMC comprehensive tester, when the capacitor is carried on a motor controller for power-on work, the EMC comprehensive tester can extract noise signals on the bus of the capacitor, and the effect of electromagnetic compatibility is monitored in real time.
Referring to fig. 1-11, the positive copper bar 4 and the negative copper bar 5 are low stray inductance wave stack busbar designs, comprising two or more wave stacks passing through the polysilicon magnetic ring 3.
In the invention, the wave-shaped design is beneficial to reducing the stray inductance generated in the flowing process of the current, the stray inductance is unnecessary inductance in a current path, which can cause energy loss and electromagnetic interference, and the current path is optimized through the wave-shaped laminated design, so that the inductance value is reduced, thereby improving the efficiency and the stability of the system; the laminated design not only increases the surface area of the copper bar, is beneficial to heat dissipation, but also enables current distribution to be more uniform, in the polycrystalline silicon magnetic ring 3, the laminated structure can better interact with the magnetic ring to improve electromagnetic conversion efficiency, and the polycrystalline silicon magnetic ring 3 has good magnetic conductivity and magnetic saturation characteristics, can effectively guide and control a magnetic field, and when the wavy laminated busbar passes through the polycrystalline silicon magnetic ring 3, the magnetic ring can enhance or change magnetic field distribution around the busbar, so that electromagnetic performance is further optimized; the design of low stray inductance is beneficial to reducing electromagnetic radiation and electromagnetic interference and improving electromagnetic compatibility of the whole system;
The wave shape can increase the contact area between the copper bars to improve the compactness and the stability of connection, bigger contact area helps reducing contact resistance, improves current transmission efficiency, through the design of wave form, can reduce the clearance between the copper bars to a certain extent, reduces electromagnetic interference and stray inductance because of the clearance produces, and the wave shape can increase the surface area of copper bars, is favorable to the heat dissipation, and at the current transmission in-process, the copper bars can produce certain heat, and good heat dispersion helps keeping the steady operation of system.
Referring to fig. 8, the wavy laminate formed by the positive electrode copper bar 4 and the negative electrode copper bar 5 is a triangular wavy line.
In the invention, the triangular wave line has sharp wave crests and wave troughs, so that stronger electromagnetic concentration effect can be generated locally, and the triangular wave line design can be more effective in occasions needing to enhance local magnetic field or heat dissipation effect; BOOST is an important feature of such a thin film capacitor, and it can BOOST the voltage of the battery to a higher level to meet the power supply requirements of the motor and other devices in the new energy automobile, and the triangular wave-shaped design may help to form more complex electric field and magnetic field distribution inside the capacitor, and such distribution may be beneficial to improving BOOST efficiency and stability.
Referring to fig. 7, the wavy stack formed by the positive electrode copper bar 4 and the negative electrode copper bar 5 is a smooth semicircular wavy line.
In the invention, the semicircular arc shape design ensures that the surface of the copper bar is smooth and continuous, right angles and sharp parts are reduced, the design is beneficial to reducing electromagnetic radiation and interference, the smooth surface reduces the scattering of electromagnetic waves, and meanwhile, the semicircular arc shape is beneficial to improving the heat dissipation efficiency, and the smooth surface is beneficial to air flow and heat transfer.
Referring to fig. 9, the wavy stack formed by the positive electrode copper bar 4 and the negative electrode copper bar 5 is a trapezoidal wavy line.
In the invention, the trapezoid wave line shows trapezoid change on the cross section and has gradually increased width or height, and different inductance values and electromagnetic shielding effects can be provided at different positions through the design; due to the variation of the trapezoidal cross section, the current may generate uneven magnetic field distribution during transmission, and such unevenness may help to optimize the filtering effect or electromagnetic compatibility;
Referring to fig. 1-11, further, the positive electrode copper bar 4 and the negative electrode copper bar 5 of the wave-shaped laminated structure comprise two or more wave laminates passing through the polysilicon magnetic ring 3, wherein the wave laminates at two ends are big waves, the wave laminates at the middle part are small waves, and the wave height relationship between the big waves and the small waves is:
Wherein: high ratio of large wave to small wave
-Wave height of big waves
-Wave height of small waves
-The rate of increase of the ratio of the height of the large waves to the height of the small waves, the range of values: 0.1-0.12
When the number of the middle small waves is 0, the ratio of the height of the big waves to the height of the waves in a certain reference is taken as the value: 1
-Number of small waves in the middle.
In particular, the two triangles at the edges of the triangular wavy line are maximized, the number of triangles in the middle is smaller than the two large triangles at the edges, as shown in fig. 8, so that the two triangular waves at the edges are maximized to more effectively guide the electromagnetic field to form a stronger concentration effect at the edges of the capacitor, and the design helps to form a "barrier" at the edges of the capacitor, so that the electromagnetic field tends to circulate more inside the capacitor than radiate directly outwards; meanwhile, the middle waves are set to be minimum, so that the interference and obstruction of the areas on the electromagnetic field can be reduced, the current flows in the areas more stably due to the design of the small waves, abrupt changes and fluctuation of the electromagnetic field are reduced, and the stability and the order of the electromagnetic field are maintained;
Moreover, the large waves at the edge can guide the electromagnetic field and also can be used as a part of electromagnetic shielding, so that the electromagnetic shielding performance of the capacitor can be improved by blocking or weakening the radiation of the electromagnetic field inside the capacitor to the external space;
the same is true for semicircular arc wavy lines and trapezoidal wavy lines.
By designing the wavy laminated busbar with low stray inductance of the positive electrode copper bar 4 and the negative electrode copper bar 5, the wavy line design can increase the surface area of the copper bar, thereby reducing resistance and energy loss, which is helpful for improving the current transmission efficiency and reducing heat generation; the wave line shape design is beneficial to increasing the contact area between the copper bar and the surrounding environment, improving the heat dissipation efficiency, and particularly has obvious advantages in high-power transmission occasions; by optimizing the shape and size of the wavy line, the electromagnetic characteristics of the copper bar can be adjusted, so that the electromagnetic radiation and interference level are reduced, and the electromagnetic compatibility of the whole system is improved; the wave line design can increase the rigidity and toughness of the copper bar and improve the stability of the copper bar in mechanical stress and vibration environments, which has important significance for ensuring long-term stable operation of the direct current bus; the wavy line design may be adjusted and optimized according to actual needs to accommodate different layout and space constraints, which helps achieve a more compact, more efficient electrical system design.
In one embodiment, referring to fig. 11, in the internal circuit topology diagram of the film capacitor, direct current is output from P (in) to P (out) and from N (in) to N (out) respectively, and ripple current is output from C to P (in) -P (out), and the application adopts the design that direct current buses P (in) -P (out), N (in) -N (out) and capacitor welding busbar are independently wired and recombined, so that the temperature rise of a capacitor core 6 caused by overlarge current of the direct current buses can be reduced, meanwhile, two nut materials on a copper bar of the direct current buses adopt T2 red copper, and the connection part of the nut and the busbar is filled and soldered, and a high-frequency welding process is adopted, so that the nut has the functions of fixed installation and large current flowing;
the range of the values of the parts in the circuit topological graph is as follows:
45μF≤C≤200μF
11μH≤L≤30μH
0.001μF≤CY1=CY2≤0.1μF
0.1μF≤CY3=CY4≤0.47μF。
Referring to fig. 1 to 11, the capacitor core 6 in the case 1 is filled with epoxy or polyurethane, and the film capacitor is vacuum-packed.
In the invention, the capacitor core 6 of the film capacitor is filled with epoxy resin or polyurethane materials and vacuum-packaged, so that the insulation performance, mechanical strength, thermal stability and electrical performance of the capacitor can be obviously improved, and the capacitor is very important for ensuring long-term stable operation and reliability of the capacitor.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The utility model provides an integrated online detection formula EMC and BOOST function's film capacitor, includes casing (1) and sets up a plurality of group capacitor core (6) inside casing (1), its characterized in that still includes:
The positive electrode copper bar (4) and the negative electrode copper bar (5) are electrically connected with the capacitor core (6), and the positive electrode copper bar (4) and the negative electrode copper bar (5) are of laminated busbar design;
A polysilicon magnetic ring (3) wrapped on the positive copper bar (4) and the negative copper bar (5);
The Y2 capacitor group (7) is electrically connected with the positive electrode copper bar (4) and the negative electrode copper bar (5), and the Y2 capacitor group (7) and the polycrystalline silicon magnetic ring (3) form an LC passive filter;
the inductance between the positive electrode copper bar (4) and the negative electrode copper bar (5) and the polycrystalline silicon magnetic ring (3) is as follows:
Wherein, the method comprises the steps of, wherein, -Inductance value
-Permeability in vacuum, 4 pi x 10 −7 henry/m
-Relative permeability of magnetic ring
Equivalent number of turns of busbar
Cross-sectional area of busbar
Average length of busbar.
2. A thin film capacitor integrating on-line detected EMC and BOOST functions as claimed in claim 1, further comprising: and the integrated wiring harness (2) is electrically connected with the Y2 capacitor bank (7), the positive electrode copper bar (4) and the negative electrode copper bar (5).
3. The thin film capacitor integrated with the on-line detection type EMC and BOOST boosting function as recited in claim 1, wherein an insulating film (8) is arranged between the positive electrode copper bar (4) and the negative electrode copper bar (5).
4. The thin film capacitor integrated with the on-line detection type EMC and BOOST boosting function according to claim 1, wherein the positive electrode copper bar (4) and the negative electrode copper bar (5) are of a low stray inductance wave-shaped laminated busbar design, and comprise two or more wave laminates penetrating through the polysilicon magnetic ring (3).
5. The thin film capacitor integrated with the on-line detection type EMC and BOOST boosting function as recited in claim 4 wherein the wavy stack formed by the positive electrode copper bar (4) and the negative electrode copper bar (5) is a triangular wavy line.
6. The thin film capacitor integrated with on-line detection type EMC and BOOST functions according to claim 4, wherein the wavy stack formed by the positive electrode copper bar (4) and the negative electrode copper bar (5) is a smooth semicircular wavy line.
7. The thin film capacitor integrated with the on-line detection type EMC and BOOST boosting function as recited in claim 4 wherein the wavy stack formed by the positive electrode copper bar (4) and the negative electrode copper bar (5) is a trapezoid wavy line.
8. The thin film capacitor integrated with on-line detection type EMC and BOOST functions as claimed in any one of claims 5-7, wherein the positive electrode copper bar (4) and the negative electrode copper bar (5) of the wave stack shape comprise two or more wave stacks penetrating through the polysilicon magnetic ring (3), wherein the wave stacks at two ends are large waves, the wave stacks at the middle part are small waves, and the wave height relationship between the large waves and the small waves is:
， Wherein: high ratio of large wave to small wave
-Wave height of big waves
-Wave height of small waves
-The rate of increase of the ratio of the height of the large waves to the height of the small waves, the range of values: 0.1-0.12
When the number of the middle small waves is 0, the ratio of the height of the big waves to the height of the waves in a certain reference is taken as the value: 1
-Number of small waves in the middle.
9. A film capacitor integrating on-line detection EMC and BOOST functions according to claim 1, characterized in that the capacitor core (6) in the housing (1) is filled with epoxy or polyurethane, and the film capacitor is vacuum-packed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411442342.9A CN118969422B (en) | 2024-10-16 | 2024-10-16 | A film capacitor with integrated online detection EMC and BOOST boost function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411442342.9A CN118969422B (en) | 2024-10-16 | 2024-10-16 | A film capacitor with integrated online detection EMC and BOOST boost function |
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| CN118969422B CN118969422B (en) | 2025-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120049851A (en) * | 2025-04-27 | 2025-05-27 | 深圳市创容新能源有限公司 | High-inductance integrated capacitance filter assembly and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111403174A (en) * | 2020-03-25 | 2020-07-10 | 东风汽车集团有限公司 | Film capacitor with integrated EMC and bleeder functions and its motor controller |
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2024
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| US20210175184A1 (en) * | 2018-07-18 | 2021-06-10 | Delta Electronics (Shanghai) Co., Ltd. | Power module assembly |
| CN111403174A (en) * | 2020-03-25 | 2020-07-10 | 东风汽车集团有限公司 | Film capacitor with integrated EMC and bleeder functions and its motor controller |
| CN113241956A (en) * | 2021-06-18 | 2021-08-10 | 中国第一汽车股份有限公司 | Inverter assembly |
| CN114597064A (en) * | 2022-03-09 | 2022-06-07 | 深圳市汇北川电子技术有限公司 | Power film capacitor integrating EMC BOOST assembly and direct current supporting function |
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| CN120049851A (en) * | 2025-04-27 | 2025-05-27 | 深圳市创容新能源有限公司 | High-inductance integrated capacitance filter assembly and control method thereof |
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| CN118969422B (en) | 2025-01-28 |
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