CN207910466U - A kind of Vehicular charger inlet circuit - Google Patents
A kind of Vehicular charger inlet circuit Download PDFInfo
- Publication number
- CN207910466U CN207910466U CN201820322019.1U CN201820322019U CN207910466U CN 207910466 U CN207910466 U CN 207910466U CN 201820322019 U CN201820322019 U CN 201820322019U CN 207910466 U CN207910466 U CN 207910466U
- Authority
- CN
- China
- Prior art keywords
- circuit
- vehicular charger
- protection
- short
- charger inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 208000025274 Lightning injury Diseases 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
Abstract
The utility model discloses a kind of Vehicular charger inlet circuits, include the composed structure of EMI filter circuit, surge protection circuit, soft starting circuit, short-circuit protection circuit and these circuits.Above-mentioned each circuit is respectively positioned on Vehicular charger input terminal, is sequentially connected inside housings.The utility model improves the Electro Magnetic Compatibility and efficiency of Vehicular charger while offer Vehicular charger short-circuit protection, surge protection etc. are protected in all directions so that Vehicular charger work is more stablized.
Description
Technical field
The utility model is related to power electronics field, more particularly to the applicable Vehicular charger of a kind of electric vehicle is defeated
Input circuit.
Background technology
Vehicular charger is the important component of electric vehicle electric control gear, its effect is by the electric energy of public electric wire net
The direct current being transformed to required by vehicle-mounted energy storage device, and charge to vehicle-mounted energy storage device.
Due to being connected directly with power grid, influence of the interference noise to charger in power grid need to be considered；Meanwhile charger
The high-speed switch action of main circuit power switch tube forms electromagnetic interference source, and alternating voltage can be by circuit with electric current
Component generates very strong spike interference and resonance interference, these serious interferences polluted power grid, and can influence nearby electron and set
Standby normal work.
Further, since the charging capacitor of pfc converter is larger in charger, larger surge electricity is will produce in booting moment
Stream, it is possible to rectifier bridge can be burnt.
Meanwhile charger should take lighting protection measure, lightning stroke to be equivalent to an instantaneous huge energy and be added in equipment,
It needs equipment that can quickly discharge over the ground, big energy is allowed quickly to pass in the earth.
Existing charger product generally existing defencive function is imperfect, or only uses relatively simple filtering method and cause to resist
Interference performance is weak, or causes Anti-surging less reliable since Anti-surging device is single, or causes since soft start design is unreasonable
The problems such as starting current impacts or influences efficiency.
Utility model content
The purpose of this utility model is to provide one kind, and EMI filtering, surge protection, soft start and short-circuit protection may be implemented
The Vehicular charger inlet circuit of function, allows the operation that Vehicular charger is more stable and reliable.
The utility model is realized by following technical scheme：
A kind of Vehicular charger inlet circuit, including EMI filter circuit, surge protection circuit, soft starting circuit and short
Protect circuit in road；Input power cord is connected with short-circuit protection circuit, then successively pass through surge protection circuit, EMI filter circuit and
Soft starting circuit is connected with the rectification circuit of Vehicular charger.
Further, the EMI filter circuit is made of two-stage exchange EMI filtering pi-network parallel connections, every grade of pi-network
It is made of respectively co-mode coil, X capacitances and Y capacitance；X capacitances are connected across input power cord both ends, the input side with co-mode coil
Parallel connection, co-mode coil outlet side both ends are separately connected one or more Y capacitances, and the other end of Y capacitance with shell is connected.
Further, the surge protection circuit is made of two class protection device parallel connection, and first class of protection device is gas
Discharge tube, second class protection device are varistor.
Further, the soft starting circuit is made of thermistor and relay parallel connection.
Further, the short-circuit protection circuit is made of a fuse.
Compared with prior art, the beneficial effects of the utility model are as follows：
（1）Realize the multi-faceted protection to Vehicular charger, including short-circuit protection, for the wave of lightning stroke and booting moment
It gushes and protects and improve internal system and external Electro Magnetic Compatibility, keep charger system work more stable.For each guarantor
It is thorough that the specific circuit design of protective function considers, had not only ensured the validity of protection, but also ensures system effectiveness not by shadow
It rings.
（2）Electromagnetic interface filter can inhibit switch spike electric current to flow into power supply, and the High-frequency Interference on power cord can also be prevented to pass
Enter rear class converter.Be conducive to improve the Electro Magnetic Compatibility between internal system and system.
（3）Gas-discharge tube can bear big surge current, and varistor can quickly respond in s grades of time ranges of μ,
The characteristics of using the above different surge suppression devices, reliably protecting may be implemented.
（4）After booting, thermistor generates heat rapidly, temperature increases, resistance value can it is rapid within the time of Millisecond under
The rank of a very little is dropped to, the size in general only several Europe of zero to several Europe, relative to traditional fixed resistance value current-limiting resistance
Speech, it is meant that ohmically power consumption is because the decline of resistance value has decreased dozens to one hundred times；And thermistor is cut out both
Its service life is extended, and ensures that it is fully cooled the time.Therefore this design is very suitable for transfer efficiency and energy saving
The on-board charging system having higher requirements.
（5）The presence of fuse can form short-circuit protection to internal circuit.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 is fuse, and 2 be gas-discharge tube, and 3 be varistor, and 4 be x capacitances, and 5 be common mode inductance, and 6 be y electricity
Hold, 7 be level-one EMI filter modules, and 8 be charger shell, and 9 be thermistor, and 10 be relay.
Specific implementation mode
Fuse, surge protection circuit, EMI filter circuit and soft starting circuit are further described below in conjunction with the accompanying drawings
Integration mode.
As shown in Figure 1, after input power cord enters 8 inside of Vehicular charger shell, it is connected first with fuse 1, fuses
Device 1 plays the role of short-circuit protection；Then it is connected with gas-discharge tube 2 and varistor 3, gas-discharge tube 2 and varistor 3
Surge protection circuit is together constituted, when the surges such as thunder and lightning arrive, if surge current is big, varistor 3 starts, and lets out
Certain surge current is put, both end voltage can increase, until pushing the electric discharge of prime gas-discharge tube 2, high current is let out
It is put into ground；Then it is connected with two-stage π types electromagnetic interface filter 7, wherein each grade is respectively by 6 structure of X capacitances 4, common mode inductance 5 and Y capacitance
Can inhibit common-mode noise at, common mode inductance 5 therein, X capacitances 4 for inhibiting differential mode noise, Y capacitance 6 have inhibit differential mode and
The ability of common-mode noise can inhibit the Conduction Interference of power supply well；Finally be made of thermistor 9 and relay 10 it is soft
Start-up circuit is connected, and when powering on, relay 10 is in open-circuit condition, and electric current is flowed by thermistor 9 in charger at this time,
After charger works normally, relay 10 is closed, and thermistor 9 is short-circuited, and at this moment electric current is flowed by relay 10 and charged
In machine, reaches protection input stage circuit and put forward efficient purpose.In practical applications, the front and back connection relation of above each circuit
It can be adjusted.
Description for the understanding of specific implementation mode is only to understand the utility model for help, rather than be used for limiting
The utility model.Those skilled in the art can carry out some modifications and changes using the thought of the utility model, as long as
Its technological means is not detached from the thought and main points of the utility model, is still within the protection scope of the utility model.
Claims (5)
1. a kind of Vehicular charger inlet circuit, it is characterised in that：Including EMI filter circuit, surge protection circuit, soft start
Circuit and short-circuit protection circuit；Input power cord is connected with short-circuit protection circuit, then passes through surge protection circuit, EMI filters successively
Wave circuit and soft starting circuit are connected with the rectification circuit of Vehicular charger.
2. a kind of Vehicular charger inlet circuit according to claim 1, it is characterised in that：The EMI filter circuit
It is made of two-stage exchange EMI filtering pi-network parallel connections, every grade of pi-network is made of co-mode coil, X capacitances and Y capacitance respectively；X
Capacitance is connected across input power cord both ends, in parallel with the input side of co-mode coil, and co-mode coil outlet side both ends are separately connected one
The other end of a or multiple Y capacitances, Y capacitance with shell is connected.
3. a kind of Vehicular charger inlet circuit according to claim 1, it is characterised in that：The surge protection electricity
It route two class protection device parallel connection to constitute, first class of protection device is gas-discharge tube, and second class protection device is varistor.
4. a kind of Vehicular charger inlet circuit according to claim 1, it is characterised in that：The soft starting circuit by
Thermistor and relay parallel connection are constituted.
5. a kind of Vehicular charger inlet circuit according to claim 1, it is characterised in that：The short-circuit protection circuit
It is made of a fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820322019.1U CN207910466U (en) | 2018-03-09 | 2018-03-09 | A kind of Vehicular charger inlet circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820322019.1U CN207910466U (en) | 2018-03-09 | 2018-03-09 | A kind of Vehicular charger inlet circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207910466U true CN207910466U (en) | 2018-09-25 |
Family
ID=63558925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820322019.1U Active CN207910466U (en) | 2018-03-09 | 2018-03-09 | A kind of Vehicular charger inlet circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207910466U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884500A (en) * | 2020-08-03 | 2020-11-03 | 中车青岛四方车辆研究所有限公司 | Method for suppressing common-mode conducted interference of vehicle-mounted charger |
| CN112491257A (en) * | 2020-11-17 | 2021-03-12 | 北京精密机电控制设备研究所 | Integrated DC power supply conditioning device |
-
2018
- 2018-03-09 CN CN201820322019.1U patent/CN207910466U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884500A (en) * | 2020-08-03 | 2020-11-03 | 中车青岛四方车辆研究所有限公司 | Method for suppressing common-mode conducted interference of vehicle-mounted charger |
| CN111884500B (en) * | 2020-08-03 | 2022-02-22 | 中车青岛四方车辆研究所有限公司 | Method for suppressing common-mode conducted interference of vehicle-mounted charger |
| CN112491257A (en) * | 2020-11-17 | 2021-03-12 | 北京精密机电控制设备研究所 | Integrated DC power supply conditioning device |
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