CN211791257U - Filter circuit and vehicle - Google Patents
Filter circuit and vehicle Download PDFInfo
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- CN211791257U CN211791257U CN202020222869.1U CN202020222869U CN211791257U CN 211791257 U CN211791257 U CN 211791257U CN 202020222869 U CN202020222869 U CN 202020222869U CN 211791257 U CN211791257 U CN 211791257U
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Abstract
The utility model discloses a filter circuit, include: the common-mode inductor comprises a common-mode inductor, a first differential-mode inductor and a second differential-mode inductor, wherein the first end of the common-mode inductor is connected with the first end of the alternating current power supply, and the second end of the common-mode inductor is connected with the second end of the alternating current power supply; the first end of the first differential mode inductor is connected with the third end of the common mode inductor, and the second end of the first differential mode inductor is connected with the first signal output end of the filter circuit; and the first end of the second differential-mode inductor is connected with the fourth end of the common-mode inductor, and the second end of the second differential-mode inductor is connected with the second signal output end of the filter circuit. According to the utility model discloses a filter circuit can effectively restrain the electromagnetic interference noise of AC power port.
Description
Technical Field
The utility model relates to a filtering technology field, in particular to filter circuit and vehicle.
Background
With the increasingly stringent requirements of the state on the automobile emission, the research and development routes of large automobile enterprises are gradually expanded from the traditional fuel automobile to the field of electric automobiles. Compared with the traditional fuel oil automobile, the electric automobile has the characteristic of needing to be charged, and especially the alternating current charging mode becomes the mainstream charging mode of the electric automobile. The conducted noise of the ac charging will cause various disturbances to the national grid, which will affect the normal operation of other electric devices, and even cause the loss of the electronic products connected to the grid.
In order to protect the power consumption quality of national power grids, a series of standards are established domestically and overseas to restrict the electromagnetic compatibility conduction characteristics of products such as an alternating current charger. Meanwhile, the Electromagnetic interference noise of alternating current charging also becomes a problem point of focusing attention and rectification when conducting Electromagnetic Compatibility tests are performed by various major host factories, but at present, the technology of the domestic electric vehicle industry is still in the development stage, the influence on the Electromagnetic Compatibility is not sufficient, the experience is also insufficient, and the EMC (Electromagnetic Compatibility) tests of an AC (alternating current) power port are often difficult to pass, so that the AC power port filter circuit capable of effectively suppressing the Electromagnetic interference noise is particularly important.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at least from solving one of the technical problem in the above-mentioned technique to a certain extent.
Therefore, a first object of the present invention is to provide a filter circuit, which can effectively suppress the electromagnetic interference noise at the power port.
A second object of the present invention is to provide a vehicle.
In order to achieve the above object, the present invention provides in a first aspect a filter circuit, including: a first end of the common mode inductor is connected with a first end of the alternating current power supply, and a second end of the common mode inductor is connected with a second end of the alternating current power supply; a first end of the first differential-mode inductor is connected with a third end of the common-mode inductor, and a second end of the first differential-mode inductor is connected with a first signal output end of the filter circuit; and a first end of the second differential-mode inductor is connected with a fourth end of the common-mode inductor, and a second end of the second differential-mode inductor is connected with a second signal output end of the filter circuit.
According to the utility model discloses a filter circuit, including common mode inductance, first differential mode inductance and second differential mode inductance, wherein, common mode inductance's first end is connected with alternating current power supply's first end, common mode inductance's second end is connected with alternating current power supply's second end, first differential mode inductance's first end and common mode inductance's third end are connected, first differential mode inductance's second end is connected with filter circuit's first signal output part, second differential mode inductance's first end and common mode inductance's fourth end are connected, second differential mode inductance's second end and filter circuit's second signal output part are connected. Therefore, the circuit can effectively suppress electromagnetic interference noise of the AC power supply port.
In addition, according to the utility model provides a filter circuit still can have following additional technical characterstic:
specifically, the filter circuit further includes: and a first end of the first capacitor is connected with a first end of the alternating current power supply, and a second end of the first capacitor is connected with a second end of the alternating current power supply.
Specifically, the filter circuit further includes: and a first end of the second capacitor is connected with the first signal output end, and a second end of the second capacitor is connected with the second signal output end.
Specifically, the filter circuit further includes: a first end of the third capacitor is connected with a first end of the alternating current power supply, and a second end of the third capacitor is grounded; and a first end of the fourth capacitor is connected with the second end of the alternating current power supply, and a second end of the fourth capacitor is grounded.
Specifically, the filter circuit further includes: and a first end of the fifth capacitor is connected with the first end of the alternating current power supply, a second end of the fifth capacitor is grounded, and the capacitance values of the fifth capacitor and the third capacitor are different.
Specifically, the filter circuit further includes: and a first end of the sixth capacitor is connected with the second end of the alternating current power supply, a second end of the sixth capacitor is grounded, and the capacitance values of the sixth capacitor and the fourth capacitor are different.
Specifically, the filter circuit further includes: a first end of the seventh capacitor is connected with a first end of the common mode inductor, and a second end of the seventh capacitor is connected with a second end of the first differential mode inductor; and a first end of the eighth capacitor is connected with the second end of the common mode inductor, and a second end of the eighth capacitor is connected with the second end of the second differential mode inductor.
Wherein the first capacitor and the second capacitor are X-type safety capacitors.
The third capacitor, the fourth capacitor, the fifth capacitor and the sixth capacitor are Y-type safety capacitors.
To achieve the above object, a second aspect of the present invention provides a vehicle including the filter circuit described above.
The utility model discloses a vehicle, through foretell filter circuit, can effectively restrain the electromagnetic interference noise of AC power port.
Drawings
Fig. 1 is a circuit diagram of a filter circuit according to an embodiment of the present invention; and
fig. 2 is a block schematic diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
A filter circuit according to an embodiment of the present invention is described below with reference to the drawings.
Fig. 1 is a circuit diagram of a filter circuit according to an embodiment of the present invention. As shown in fig. 1, the filter circuit according to the embodiment of the present invention includes: common mode inductance L0, first differential mode inductance L1, and second differential mode inductance L2.
The first end 1 of the common mode inductor L0 is connected to the first end of the ac power supply, for example, the L end, the second end 2 of the common mode inductor L0 is connected to the second end of the ac power supply, for example, the N end, the first end of the first differential mode inductor L1 is connected to the third end 3 of the common mode inductor L0, the second end of the first differential mode inductor L1 is connected to the first signal output end of the filter circuit, the first end of the second differential mode inductor L2 is connected to the fourth end 4 of the common mode inductor L0, and the second end of the second differential mode inductor L2 is connected to the second signal output end of the filter circuit.
It should be noted that the common mode inductor L0 has a first coil and a second coil, where the first coil and the second coil are coils formed by winding two wires of the same loop on the same magnetic core material, and when a common mode current flows through the common mode inductor L0, because the common mode current is in the same direction in the common mode inductor, magnetic fields in the same direction are generated in the first coil and the second coil of the common mode inductor L0, at this time, the inductance of the first coil and the second coil is increased, that is, the inductance of the first coil and the second coil to the common mode current is increased, so that the common mode current is more greatly suppressed, the purpose of attenuating the common mode current is achieved, and the effect of suppressing the common mode interference noise is achieved. The first differential-mode inductor L1 and the second differential-mode inductor L2 function to effectively suppress differential-mode interference noise.
According to an embodiment of the present invention, as shown in fig. 1, the filter circuit further includes: a first capacitor C1 and a second capacitor C2. A first end of the first capacitor C1 is connected to a first end of the ac power source, such as the L end, and a second end of the first capacitor C1 is connected to a second end of the ac power source, such as the N end; a first terminal of the second capacitor C2 is connected to the first signal output terminal and a second terminal of the second capacitor C2 is connected to the second signal output terminal. The first capacitor C1 and the second capacitor C2 can be X-type safety capacitors, so that electric shock cannot be caused even if the first capacitor C1 and the second capacitor C2 fail, personal safety is not endangered, and the differential mode interference noise is mainly suppressed.
Further, as shown in fig. 1, the filter circuit further includes: a third capacitor C3 and a fourth capacitor C4, wherein a first terminal of the third capacitor C3 is connected to a first terminal of the ac power source, such as the L terminal, a second terminal of the third capacitor C3 is connected to GND, a first terminal of the fourth capacitor C4 is connected to a second terminal of the ac power source, such as the N terminal, and a second terminal of the fourth capacitor C4 is connected to GND (Ground). The third capacitor C3 and the fourth capacitor C4 are Y-type safety capacitors, so that electric shock cannot be caused even if the third capacitor C3 and the fourth capacitor C4 fail, personal safety is not endangered, and the third capacitor C3 and the fourth capacitor C4 mainly play a role in filtering common-mode interference noise, so that the common-mode interference noise is obviously suppressed.
Further, as shown in fig. 1, the filter circuit further includes: a fifth capacitor C5 and a sixth capacitor C6. The first end of the fifth capacitor C5 is connected to the first end of the ac power source, such as the L end, the second end of the fifth capacitor C5 is grounded GND, the capacitance values of the fifth capacitor C5 and the third capacitor C3 are different, the first end of the sixth capacitor C6 is connected to the second end of the ac power source, such as the N end, the second end of the sixth capacitor C6 is grounded GND, and the capacitance values of the sixth capacitor C6 and the fourth capacitor C4 are different. It should be noted that the fifth capacitor C5 and the sixth capacitor C6 are also Y-type safety capacitors, the fifth capacitor C5 is connected in parallel to two ends of the third capacitor C3, and the sixth capacitor C6 is connected in parallel to two ends of the fourth capacitor C4, so as to achieve the purpose of suppressing the low-frequency common mode interference noise and the high-frequency common mode interference noise respectively by using a combination of a large capacitor and a small capacitor.
Further, as shown in fig. 1, the filter circuit further includes: a seventh capacitance C7 and an eighth capacitance C8. A first end of the seventh capacitor C7 is connected to the first end 1 of the common mode inductor L0, a second end of the seventh capacitor C7 is connected to the second end of the first differential mode inductor L1, a first end of the eighth capacitor C8 is connected to the second end 2 of the common mode inductor L0, and a second end of the eighth capacitor C8 is connected to the second end of the second differential mode inductor L2. The seventh capacitor C7 and the eighth capacitor C8 are used as supplementary filter capacitors to increase the filtering effect.
Particularly, the utility model discloses first electric capacity C1 among the filter circuit, first differential mode inductance L1, the common mode interference that power port produced can be suppressed to second differential mode inductance L2 and second electric capacity C2, third electric capacity C3, fourth electric capacity C4, fifth electric capacity C5, the differential mode interference noise that power signal produced can be suppressed to sixth electric capacity C6 and common mode inductance L0, seventh electric capacity C7 and eighth electric capacity C8 play the filter effect, specifically, when this filter circuit uses at AC power port, can suppress the electromagnetic interference noise of AC power port when electric automobile inserts national grid through this filter circuit, output AC power after the filtering to the back stage circuit like rectifier module, can improve the stability of power module and national grid like this, and the utility model discloses have following characteristics in the aspect of electric automobile AC power port filtering: common mode interference noise of the AC power supply port can be effectively inhibited within the frequency range of 0.15MHz-108 MHz; the differential mode interference noise of the AC power supply port can be effectively inhibited within the frequency range of 0.15MHz-108 MHz.
When the components are designed, the filter circuit may be designed as a port filter circuit at a port position of a similar component such as an OBC (On Board Charger). In the design of a PCB (Printed circuit board), it is usually necessary to arrange the components of fig. 1 in the order of the schematic diagram.
In conclusion, according to the utility model discloses a filter circuit, including common mode inductance, first differential mode inductance and second differential mode inductance, wherein, common mode inductance's first end is connected as L end with alternating current power supply's first end, common mode inductance's second end and alternating current power supply's second end are connected as the N end, first differential mode inductance's first end and common mode inductance's third end are connected, first differential mode inductance's second end is connected with filter circuit's first signal output part, second differential mode inductance's first end and common mode inductance's fourth end are connected, second differential mode inductance's second end and filter circuit's second signal output part are connected. Therefore, the filter circuit can effectively suppress electromagnetic interference noise of the AC power supply port.
Fig. 2 is a block schematic diagram of a vehicle according to an embodiment of the present invention. As shown in fig. 2, a vehicle 1000 according to an embodiment of the present invention includes the filter circuit 100.
The utility model discloses a vehicle, through foretell filter circuit, can effectively restrain the electromagnetic interference noise of AC power port.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A filter circuit, comprising:
the common mode inductor is connected with a first end of an alternating current power supply at a first end, and is connected with a second end of the alternating current power supply at a second end;
a first end of the first differential-mode inductor is connected with a third end of the common-mode inductor, and a second end of the first differential-mode inductor is connected with a first signal output end of the filter circuit;
and a first end of the second differential-mode inductor is connected with a fourth end of the common-mode inductor, and a second end of the second differential-mode inductor is connected with a second signal output end of the filter circuit.
2. The filter circuit of claim 1, further comprising:
and a first end of the first capacitor is connected with a first end of the alternating current power supply, and a second end of the first capacitor is connected with a second end of the alternating current power supply.
3. The filter circuit of claim 2, further comprising:
and a first end of the second capacitor is connected with the first signal output end, and a second end of the second capacitor is connected with the second signal output end.
4. The filter circuit of claim 1, further comprising:
a first end of the third capacitor is connected with a first end of the alternating current power supply, and a second end of the third capacitor is grounded;
and a first end of the fourth capacitor is connected with the second end of the alternating current power supply, and a second end of the fourth capacitor is grounded.
5. The filter circuit of claim 4, further comprising:
and a first end of the fifth capacitor is connected with the first end of the alternating current power supply, a second end of the fifth capacitor is grounded, and the capacitance values of the fifth capacitor and the third capacitor are different.
6. The filter circuit of claim 5, further comprising:
and a first end of the sixth capacitor is connected with the second end of the alternating current power supply, a second end of the sixth capacitor is grounded, and the capacitance values of the sixth capacitor and the fourth capacitor are different.
7. The filter circuit of claim 1, further comprising:
a first end of the seventh capacitor is connected with a first end of the common mode inductor, and a second end of the seventh capacitor is connected with a second end of the first differential mode inductor;
and a first end of the eighth capacitor is connected with the second end of the common mode inductor, and a second end of the eighth capacitor is connected with the second end of the second differential mode inductor.
8. The filter circuit of claim 3, wherein the first capacitor and the second capacitor are X-type safety capacitors.
9. The filter circuit of claim 6, wherein the third capacitor, the fourth capacitor, the fifth capacitor, and the sixth capacitor are Y-type safety capacitors.
10. A vehicle, characterized by comprising a filter circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020222869.1U CN211791257U (en) | 2020-02-27 | 2020-02-27 | Filter circuit and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020222869.1U CN211791257U (en) | 2020-02-27 | 2020-02-27 | Filter circuit and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211791257U true CN211791257U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020222869.1U Active CN211791257U (en) | 2020-02-27 | 2020-02-27 | Filter circuit and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211791257U (en) |
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2020
- 2020-02-27 CN CN202020222869.1U patent/CN211791257U/en active Active
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