CN209001825U - Anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converter - Google Patents
Anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converter Download PDFInfo
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- CN209001825U CN209001825U CN201821818917.2U CN201821818917U CN209001825U CN 209001825 U CN209001825 U CN 209001825U CN 201821818917 U CN201821818917 U CN 201821818917U CN 209001825 U CN209001825 U CN 209001825U
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- 238000004891 communication Methods 0.000 title claims abstract description 68
- 230000001052 transient effect Effects 0.000 claims abstract description 26
- 239000011324 bead Substances 0.000 claims description 21
- 230000001629 suppression Effects 0.000 claims description 19
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model relates to photoelectric fields; more particularly to anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converter; it include: the first anti-jamming circuit; including the first Y capacitance CY1, the second Y capacitance CY2; one end of first Y capacitance connects first communications cable; other end connection protection ground wire, one end of the second Y capacitance CY2 connect first communications cable, other end connection protection ground wire；Second anti-jamming circuit, including common mode inductance FB1, the first coil of common mode inductance are serially connected in first communications cable；Third anti-jamming circuit, including the first transient current inhibit diode D1, the second transient current that diode D2, third transient current is inhibited to inhibit diode D3.The utility model increases multiple anti-jamming circuits in original CAN communication circuit, interference of the photovoltaic DC-to-AC converter to external equipment can be reduced, the anti-interference ability of itself can be promoted simultaneously, the environmental suitability ability of photovoltaic DC-to-AC converter will not be promoted in the inside chip of noisy condition damage photovoltaic DC-to-AC converter.
Description
Technical field
The utility model relates to photoelectric field more particularly to anti-interference CAN communication circuits and anti-interference photovoltaic DC-to-AC converter.
Background technique
Photovoltaic DC-to-AC converter is that solar energy power generating, wind-power electricity generation, fuel cell power generation, miniature hydro-power generation etc. are various
Renewable energy system provides various perfect power conversions and access scheme, is mainly used in the grid-connected hair of renewable energy
Electric system, off-network type village power supply system and Home Power System, and difficult area communication, traffic, road can be extended for power grid
Lamp illumination etc. provides electric power.
Although in grid-connected work, with synchronized, it is in certain error model that this is synchronized to photovoltaic DC-to-AC converter for its output
Enclose interior synchronization, and due to power grid fluctuation and unstability is affected to inversion output and grid-connected inverters work
Make the error of principle, so that each inverter output strictly can not even differ greatly always when grid-connected work.It therefore, is guarantor
Card stream output realizes long-range monitoring and human-computer interaction function, in original system for the communication requirement of photovoltaic DC-to-AC converter operation
Increase CAN communication circuit in system, to realize the dispatching and monitoring to work parallel network reverse.But existing CAN communication circuit exists altogether
Mould interference signal and difference/common mode surge from telecommunication circuit connectivity port etc., not only to the communication of photovoltaic inverter system
Larger interference is caused, while external equipment and photovoltaic DC-to-AC converter itself are damaged.
Utility model content
To solve the above problems, the utility model proposes anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converters, to subtract
Few interference to external equipment, while promoting the anti-interference ability of itself.
Anti-interference CAN communication circuit, first communications cable and second including connection external equipment and photovoltaic DC-to-AC converter are logical
Believe cable, further includes:
First anti-jamming circuit, including the first Y capacitance CY1, the second Y capacitance CY2, one end connection of first Y capacitance
First communications cable, other end connection protection ground wire, one end of the second Y capacitance CY2 connects first communications cable, the other end
Connection protection ground wire；
Second anti-jamming circuit, including common mode inductance FB1, the first coil of the common mode inductance are serially connected in the first communication line
Cable, the second coil tandem of common mode inductance is in second communications cable；
Third anti-jamming circuit, including the first Transient Suppression Diode D1, the second Transient Suppression Diode D2, third transient state
Inhibit diode D3, one end of the first Transient Suppression Diode D1 connects first communications cable, other end connection signal ginseng
The one end for examining ground GND, the second Transient Suppression Diode D2 connects first communications cable, and other end connection signal is with reference to ground
One end of GND, the third Transient Suppression Diode D3 connect first communications cable, and the other end connects second communications cable.
Preferably, first anti-jamming circuit is arranged close to external equipment.
It preferably, further include the 4th anti-jamming circuit, including the first high frequency magnetic bead FB2 and the second high frequency magnetic bead FB3,
The first high frequency magnetic bead FB2 is serially connected in first communications cable, and one end connects the first coil of common mode inductance, another
End connection photovoltaic DC-to-AC converter,
The second high frequency magnetic bead FB3 is serially connected in second communications cable, and one end connects the second coil of common mode inductance, another
End connection photovoltaic DC-to-AC converter.
It preferably, further include the 5th anti-jamming circuit, including third high frequency magnetic bead FB4,
Described third high frequency one end magnetic bead FB4 connects external equipment, and other end connection signal is with reference to ground GND.
It preferably, further include protecting circuit, including the first fuse FU1, the second fuse FU2,
The first fuse FU1 is serially connected in first communications cable,
The second fuse FU2 is serially connected in second communications cable.
Anti-interference photovoltaic DC-to-AC converter, including above-mentioned antijam communication circuit.
By using the utility model, following effect may be implemented:
Increase multiple anti-jamming circuits in original CAN communication circuit, it is possible to reduce photovoltaic DC-to-AC converter does external equipment
It disturbs, while the anti-interference ability of itself can be promoted, avoid damaging the inside chip of photovoltaic DC-to-AC converter in noisy condition, be promoted
The environmental suitability ability of photovoltaic DC-to-AC converter.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the overall structure diagram of the utility model embodiment one.
Specific embodiment
Below in conjunction with attached drawing, the technical solution of the utility model is further described, but the utility model and unlimited
In these embodiments.
Embodiment one
The present embodiment proposes a kind of anti-interference CAN communication circuit, increases multiple anti-interference electricity in original CAN communication circuit
Road, it is reasonable to be laid out, it is possible to reduce interference of the photovoltaic DC-to-AC converter to external equipment meets electromagnetic compatibility regulation, while can mention
The anti-interference ability for rising itself avoids damaging the inside chip of photovoltaic DC-to-AC converter in noisy condition, promotes photovoltaic DC-to-AC converter
Environmental suitability ability.
In conjunction with attached drawing 1, in the present embodiment, which includes: connect external equipment and photovoltaic DC-to-AC converter first
The communications cable and second communications cable, further includes:
First anti-jamming circuit, including the first Y capacitance CY1, the second Y capacitance CY2, one end connection first of the first Y capacitance
One end of the communications cable, the other end connection protection ground wire PE, the second Y capacitance CY2 connects first communications cable, and other end connection is protected
Protect ground wire PE.
Second anti-jamming circuit, including common mode inductance FB1, the first coil of common mode inductance are serially connected in first communications cable,
Second coil tandem of common mode inductance is in second communications cable.
Third anti-jamming circuit, including the first Transient Suppression Diode D1, the second Transient Suppression Diode D2, third transient state
Inhibit diode D3, one end of the first Transient Suppression Diode D1 connects first communications cable, and other end connection signal is with reference to ground
One end of GND, the second Transient Suppression Diode D2 connect first communications cable, and other end connection signal is with reference to ground GND, third wink
State inhibits one end of diode D3 to connect first communications cable, and the other end connects second communications cable.
Circuit is protected, protection circuit includes the first fuse FU1, the second fuse FU2, and the first fuse FU1 is serially connected in
First communications cable, the second fuse FU2 are serially connected in second communications cable.
4th anti-jamming circuit, including the first high frequency magnetic bead FB2 and the second high frequency magnetic bead FB3, the first high frequency magnetic bead FB2 string
It connects in first communications cable, one end connects the first fuse FU1, and the other end connects photovoltaic DC-to-AC converter, the second high frequency magnetic bead FB3 string
It connects in second communications cable, one end connects the second fuse FU2, and the other end connects photovoltaic DC-to-AC converter.
5th anti-jamming circuit, including third high frequency magnetic bead FB4, third high frequency one end magnetic bead FB4 connection is external to be set
Standby, other end connection signal is with reference to ground GND.
This CAN communication circuit by increase above-mentioned anti-jamming circuit realize inhibit externally to interfere and promoted itself it is anti-dry
It disturbs.It is specific:
Inhibit externally interference: CAN signal transmission inside photovoltaic DC-to-AC converter first passes around the first high frequency magnetic bead FB2 and second
High frequency magnetic bead FB3 inhibits interference；Then it is transmitted through common mode inductance FB1 outward and inhibits common mode interference；Finally by the first Y capacitance
CY1, the second Y capacitance CY2 inhibit common mode interference, and the first Y capacitance CY1, the second Y capacitance CY2 are needed by protecting ground wire PE to be connected to
In metal chassis, while the first Y capacitance CY1, the second Y capacitance CY2 give interference shape as close to the connectivity port of external equipment
At circuit, will not be radiate from casing；Once signal needs to increase third high frequency magnetic bead FB4 use with reference to having interference on ground GND
Inhibit to interfere, reduce to external radiation.By the above anti-jamming circuit, the interference signal of CAN signal is just eliminated completely, thus
Interference will not be generated to external equipment.
Promote itself anti-interference ability: external interference signals by inwardly transmitting, by the first Transient Suppression Diode D1,
Second Transient Suppression Diode D2, third Transient Suppression Diode D3 inhibit interference, and two signal wire DM EMIs of CAN pass through the
Three Transient Suppression Diode D3 are clamped to safe voltage；Two signal wire common mode interferences of CAN pass through the first transient state respectively and inhibit two
Pole pipe D1, the second Transient Suppression Diode D2 are clamped to safe voltage.First fuse FU1, the second fuse FU2 are used from extensive
Double insurance silk, once there is high current process, the first fuse FU1, the second fuse FU2 resistance value increase to circuit current limliting below,
Interference is reduced, to realize that back-end circuit is protected.
Embodiment two
The present embodiment proposes a kind of anti-interference photovoltaic DC-to-AC converter, including the anti-interference CAN communication in above-described embodiment one
Circuit.The working principle of anti-interference CAN communication circuit has been described in detail in example 1, therefore anti-dry in the present embodiment
It disturbs photovoltaic DC-to-AC converter equally and can be realized and is anti-interference.
Those skilled in the art of the present invention can do described specific embodiment various
The similar mode of modify or supplement or adopt substitutes, but without departing from the spirit of the present application or surmounts appended right and want
Seek range defined in book.
Claims (6)
1. anti-interference CAN communication circuit, first communications cable and the second communication including connection external equipment and photovoltaic DC-to-AC converter
Cable, which is characterized in that further include:
First anti-jamming circuit, including the first Y capacitance CY1, the second Y capacitance CY2, one end connection first of first Y capacitance
The communications cable, other end connection protection ground wire, one end of the second Y capacitance CY2 connects first communications cable, other end connection
Protect ground wire；
Second anti-jamming circuit, including common mode inductance FB1, the first coil of the common mode inductance are serially connected in first communications cable,
Second coil tandem of common mode inductance is in second communications cable；
Third anti-jamming circuit, including the first Transient Suppression Diode D1, the second Transient Suppression Diode D2, third transient state inhibit
One end of diode D3, the first Transient Suppression Diode D1 connect first communications cable, and other end connection signal is with reference to ground
One end of GND, the second Transient Suppression Diode D2 connect first communications cable, and other end connection signal is with reference to ground GND, institute
The one end for stating third Transient Suppression Diode D3 connects first communications cable, and the other end connects second communications cable.
2. anti-interference CAN communication circuit according to claim 1, which is characterized in that first anti-jamming circuit is close
External equipment setting.
3. anti-interference CAN communication circuit according to claim 1, which is characterized in that it further include the 4th anti-jamming circuit, packet
The first high frequency magnetic bead FB2 and the second high frequency magnetic bead FB3 are included,
The first high frequency magnetic bead FB2 is serially connected in first communications cable, and one end connects the first coil of common mode inductance, and the other end connects
Photovoltaic DC-to-AC converter is connect,
The second high frequency magnetic bead FB3 is serially connected in second communications cable, and one end connects the second coil of common mode inductance, and the other end connects
Connect photovoltaic DC-to-AC converter.
4. anti-interference CAN communication circuit according to claim 1, which is characterized in that it further include the 5th anti-jamming circuit, packet
Third high frequency magnetic bead FB4 is included,
Described third high frequency one end magnetic bead FB4 connects external equipment, and other end connection signal is with reference to ground GND.
5. anti-interference CAN communication circuit according to claim 1, which is characterized in that it further include protection circuit, including first
Fuse FU1, the second fuse FU2,
The first fuse FU1 is serially connected in first communications cable,
The second fuse FU2 is serially connected in second communications cable.
6. anti-interference photovoltaic DC-to-AC converter, which is characterized in that logical including the described in any item anti-interference CAN of the claims 1-5
Believe circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821818917.2U CN209001825U (en) | 2018-11-06 | 2018-11-06 | Anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821818917.2U CN209001825U (en) | 2018-11-06 | 2018-11-06 | Anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converter |
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| Publication Number | Publication Date |
|---|---|
| CN209001825U true CN209001825U (en) | 2019-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821818917.2U Active CN209001825U (en) | 2018-11-06 | 2018-11-06 | Anti-interference CAN communication circuit and anti-interference photovoltaic DC-to-AC converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811168A (en) * | 2020-06-11 | 2021-12-17 | 北京新能源汽车股份有限公司 | Electromagnetic interference filtering device and electric automobile |
-
2018
- 2018-11-06 CN CN201821818917.2U patent/CN209001825U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811168A (en) * | 2020-06-11 | 2021-12-17 | 北京新能源汽车股份有限公司 | Electromagnetic interference filtering device and electric automobile |
| CN113811168B (en) * | 2020-06-11 | 2024-02-09 | 北京新能源汽车股份有限公司 | Electromagnetic interference filtering device and electric automobile |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee after: Zhejiang arrow network energy technology Co.,Ltd. Address before: 311500 No. 288 Shizhu Road, Tonglu Economic Development Zone, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG SOLAX NETWORK ENERGY TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |