CN203722228U - EMC protection device of vehicle-mounted controller - Google Patents
EMC protection device of vehicle-mounted controller Download PDFInfo
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- CN203722228U CN203722228U CN201420048832.6U CN201420048832U CN203722228U CN 203722228 U CN203722228 U CN 203722228U CN 201420048832 U CN201420048832 U CN 201420048832U CN 203722228 U CN203722228 U CN 203722228U
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- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model discloses an EMC protection device of a vehicle-mounted controller. The EMC protection device comprises at least two PCB board cards and plug-ins plugged on the PCB board cards, wherein each plug-in is provided with an I/O port, I/O ports of different plug-ins are used for connecting a shielded cable or a non-shielded cable used for transmitting data signals, an I/O port EMC module is arranged at a position where the non-shielded cable or the shielded cable is connected with one I/O port, and the I/O port EMC modules are arranged on the PCB board cards. The EMC protection device improves the EMC performance of the vehicle-mounted controller by shielding the electromagnetic interference in the vehicle-mounted controller, and ensures the information sent and received by the vehicle-mounted controller to be accurate.
Description
Technical field
The utility model relates to electronic equipment electronic circuit, particularly a kind of for the EMC guard system that prevents electromagnetic interference on Vehicle Controller.
Background technology
EMC(Electro Magnetic Compatibility), Chinese is called Electro Magnetic Compatibility, refers to the ability of equipment or system electromagnetic disturbance in when work can not be subject to operational environment.
Pcb board (Printed circuit board), Chinese is called printed circuit board (PCB).
The Vehicle Controller of the safety computer platform using in field of track traffic has at present proposed the design of EMC mainly for rail vehicle and mobile unit thereof, but the electromagnetic interference problem of relevant Vehicle Controller does not have corresponding settling mode, and the EMC guard system of the main line railway system close with the Vehicle Controller of underground railway track traffic is due to voltage, inconsistent in the parameters such as electric current can not be applied on the Vehicle Controller of underground railway track traffic, in the running of the rail vehicles such as subway, Vehicle Controller comprises pcb board and other functional connector, between pcb board and functional connector, mutual electromagnetic is disturbed and is easily sent wrong signal, cause security incident.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of EMC protector of Vehicle Controller, by shielding Vehicle Controller external electromagnetic interference, improves the EMC performance of Vehicle Controller, guarantees that Vehicle Controller sends and receives information accurately.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of EMC protector of Vehicle Controller, comprise at least two pcb board cards and assign into the connector on pcb board card, described connector is provided with I/O port, I/O port on different connectors is used for connecting shielded type cable or the unshielded cable of transmission of data signals, described unshielded cable or the shielded type cable I/O port described in connecting is provided with I/O port EMC module, and described I/O port EMC module is arranged on pcb board card.
Preferably, described I/O port EMC module comprises single line EMC module and difference EMC module, and unshielded cable connects connector I/O port to the single line EMC module on pcb board card, and shielded type cable connects connector I/O port to the difference EMC module on pcb board card.
Preferably, be connected to the shielding layer grounding of the shielded type cable on connector, the signal of described shielded type cable is divided into difference positive pole and difference negative pole, described difference EMC module comprises the 4th common mode protection circuit between the 3rd common mode protection circuit, difference negative pole and the ground wire being arranged between difference positive pole and ground wire, and the second differential mode protection circuit that is connected to difference positive pole and difference negative pole.
Preferably, the 3rd described common mode protection circuit comprises the second gas discharge tube, the second described gas discharge tube is connected to difference positive pole, between difference negative pole, between difference positive pole and ground wire, be connected with a TVS pipe, one end anodal in difference and a TVS pipe is also connected with the first resistance, the other end of the one TVS pipe is connected on the second gas discharge tube, the 4th common mode protection circuit comprises the 2nd TVS pipe being connected between difference positive pole and ground wire, one end at shielded type cable negative pole and the 2nd TVS pipe is also connected with the second resistance, the other end of the 2nd TVS pipe is connected on the second gas discharge tube, the second gas discharge tube, the first resistance, the second resistance and the 3rd TVS pipe being connected between difference positive pole and difference negative pole connect and compose the second differential mode protection circuit.
Preferably, described single line EMC module comprises piezo-resistance four and the 4th TVS pipe being arranged between unshielded cable signal and ground wire, and unshielded cable is connected to the 4th TVS pipe through the 3rd resistance.
Preferably, be provided with the backboard that is used to connector and the power supply of pcb board card on pcb board card, power line connects power port EMC module, by power port EMC module, is connected to backboard.
Preferably, described power port EMC module comprises and is connected to the zero line of power supply and the second common mode protection circuit between the first common mode protection circuit, live wire and ground wire between ground wire, and the first differential mode protection circuit between live wire and zero line, also comprise the first-level filtering wave circuit secondary filter circuit being connected between zero line and live wire, described first-level filtering wave circuit is connected with secondary filter circuit.
Preferably, the first described common mode protection circuit is by the first gas discharge tube and piezo-resistance one series connection, one end of the first gas discharge tube connects ground wire, one end of piezo-resistance connects zero line, the second described common mode protection circuit is by the first gas discharge tube and piezo-resistance two series connection, piezo-resistance two one end connect the tie point of the first gas discharge tube and piezo-resistance one series connection, the other end of piezo-resistance two connects live wire, and the first described differential mode protection circuit comprises the piezo-resistance three being connected between zero line and live wire.
Preferably, also comprise a rack, rack opening is arranged on the positive facade of rack, pcb board card be arranged in rack and the interface of pcb board card towards rack opening, described connector is longitudinally plugged on the interface of pcb board card, rack footing is provided with for introducing the pull box of shielded type cable, and shielded type cable is in pull box is introduced rack and described shielded type cable connection member EMC protector also.
Preferably, described structural member EMC protector comprises the earthing rod being arranged on rack lower surface, the screen of the shielded type cable in pull box is connected on earthing rod through earth connection, the junction of described shielded type cable and earth connection is gripped by cable clamp, and described cable clamp is in described pull box and ground connection.
Adopt after technique scheme, the utlity model has following advantage:
Electromagnetic interference signal in the structural member EMC protector connecting by connector, I/O port EMC module and power port EMC module shielding Vehicle Controller, guarantees Vehicle Controller communication information accurately.In I/O port EMC module and power port EMC module, respectively the electromagnetic interference of common-mode signal and difference mode signal is suppressed, considered all sidedly the impact of the environmental parameter that Vehicle Controller may be subject to, guarantee the accuracy of communication.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the utility model elementary diagram;
Fig. 2 is difference EMC modular circuit;
Fig. 3 is power port EMC modular circuit;
Fig. 4 is single line EMC modular circuit;
Fig. 5 is the utility model interior of equipment cabinet layout;
Fig. 6 is the partial enlarged drawing at Fig. 5 A place.
Embodiment
As shown in Figure 1, a kind of EMC protector of Vehicle Controller, comprise at least two pcb board cards 1 and assign into the connector 2 on pcb board card 1, described connector 2 is provided with I/O port, I/O port on different connectors 2 is used for connecting shielded type cable 3 or the unshielded cable 4 of transmission of data signals, described unshielded cable 4 or the shielded type cable 3 I/O port described in connecting is provided with I/O port EMC module, and described I/O port EMC module is arranged on pcb board card 1.Described shielded type cable 3 is mainly used in the transmission signal higher to demand on signal quality, and such as track tachometer signal etc., shielded type cable also can connect the PORT COM on connector, mainly includes RS485 connection, CAN bus etc.By I/O port EMC module, eliminate the electromagnetic interference of connector port in Vehicle Controller, guarantee the accuracy of signal transmission.
The port of I/O described in the present embodiment EMC module comprises single line EMC module and difference EMC module, the I/O port that unshielded cable 4 connects connectors 2 is to the single line EMC module on pcb board card, and the I/O port that shielded type cable 3 connects connectors 2 is to the difference EMC module on pcb board card.By single line EMC module, eliminate the electromagnetic interference signal on unshielded cable, by difference EMC module, eliminate the electromagnetic interference signal on shield layer of shielded cable.By shielded type cable 3 ground connection that are connected on connector 2 are realized waiting because be struck by lightning the instantaneous pressure signal ground causing, prevent device damage.The signal of described shielded type cable is divided into difference positive pole and difference negative pole, described difference EMC module comprises the 4th common mode protection circuit between the 3rd common mode protection circuit, difference negative pole and the ground wire being arranged between difference positive pole and ground wire, and the second differential mode protection circuit that is connected to difference positive pole and difference negative pole.By the 3rd common mode protection circuit and the 4th common mode protection circuit, eliminate the electromagnetic interference signal between difference positive pole and ground and between difference negative pole and ground, and eliminate the electromagnetic interference signal between difference positive pole and difference negative pole by the second differential mode protection circuit, consider the electromagnetic interference influence that various environmental factors cause comprehensively, be conducive to improve EMC performance.
As a kind of preferred implementation, referring to Fig. 2, the 3rd described common mode protection circuit comprises the second gas discharge tube G2, the second described gas discharge tube G2 is connected to difference positive pole, between difference negative pole, between difference positive pole and ground wire, be connected with a TVS pipe T1, one end anodal in difference and TVS pipe T1 is also connected with the first resistance R 1, the other end of the one TVS pipe T1 is connected on the second gas discharge tube G2, the 4th common mode protection circuit comprises the 2nd TVS pipe T2 being connected between difference positive pole and ground wire, one end at shielded type cable negative pole and the 2nd TVS pipe T2 is also connected with the second resistance R 2, the other end of the 2nd TVS pipe T2 is connected on the second gas discharge tube G2, the second gas discharge tube G2, the first resistance R 1, the second resistance R 2 and the 3rd TVS pipe T3 being connected between difference positive pole and difference negative pole connect and compose the second differential mode protection circuit.Owing to being provided with difference EMC module, therefore the potential pulse that circuit be can bear is lower, will adopt the TVS pipe of low pressure clamper type, but due to the through-flow finite energy of TVS pipe, only add the EMC degree of protection that TVS pipe can not meet system, therefore will strengthen the gas discharge tube of through-current capacity.Based on gas discharge tube, open and manage slow reason than TVS; the protection TVS pipe effect that do not have above that it is directly added in TVS pipe therefore need to add the effect that current-limiting resistance (being required to meet certain power) plays buffering between gas discharge tube and TVS pipe.Wherein the minimum resistance of R can be according to formula:
determine U in formula
1what represent is gas discharge tube impact flashover voltage, U
2what represent is the highest clamp voltage of TVS pipe, and what I represented is the maximum through-current capacity of TVS pipe under certain voltage waveform impacts.Described current-limiting resistance is the first resistance R 1, the second resistance R 2, then by two electric capacity between shielded type cable positive pole and ground wire and between shielded type cable negative pole and ground wire, under common mode protection, residual voltage is carried out to High frequency filter and receives the accuracy of signal to guarantee rear class.
Referring to Fig. 4, described single line EMC module comprises piezo-resistance four Z4 and the 4th TVS pipe T4 being arranged between unshielded cable 4 signals and ground wire, and unshielded cable 4 is connected to the 4th TVS pipe T4 through the 3rd resistance R 3.In single line EMC module; owing to being single cable; therefore only need to adopt common mode protection; piezo-resistance four Z4, the 3rd resistance R 3, the 4th TVS pipe T4 form the common mode protection to single line; the 4th TVS pipe T4 forms the meticulous protection of low clamper to late-class circuit; piezo-resistance four Z4 provide large bleed off passage, and the 3rd resistance R 3 arranges for protecting the 4th TVS to manage T4, the selective basis formula of its minimum value:
determine U in formula
3what represent is the residual voltage value of piezo-resistance, U
4what represent is the highest clamp voltage of TVS pipe, and what I represented is the maximum through-current capacity of TVS pipe under certain voltage waveform impacts.Two electric capacity between unshielded cable signal and ground carry out High frequency filter to the residual voltage under common mode protection and receive the accuracy of signal to guarantee rear class.
On pcb board card 1, be provided with the backboard that is used to connector 2 and 1 power supply of pcb board card, for avoiding power port to be subject to the interference of electromagnetic signal, power line connects power port EMC module, by power port EMC module, being undertaken being connected to backboard after electromagnetic interference signal processing, is the connector on pcb board card 1 and the power supply of EMC protection module.
In the present embodiment, concrete participation seen Fig. 3, described power port EMC module comprises and is connected to the zero line N of power supply and the second common mode protection circuit between the first common mode protection circuit, live wire L and ground wire between ground wire, and the first differential mode protection circuit between live wire L and zero line N, also comprise the first-level filtering wave circuit 10 and the secondary filter circuit 11 that are connected between zero line N and live wire L, described first-level filtering wave circuit 10 is connected with secondary filter circuit 11.By the first common mode protection circuit, eliminate electromagnetic interference between the zero line N of power supply and ground wire GND, by the second common mode protection circuit, eliminate the live wire L of power supply and the electromagnetic interference between ground wire GND, by the first differential mode protection circuit, eliminate the electromagnetic interference signal between live wire L and zero line N.
As a kind of preferred implementation, the first described common mode protection circuit is connected by the first gas discharge tube G1 and piezo-resistance one Z1, one end of the first gas discharge tube G1 connects ground wire 9, one end of piezo-resistance connects zero line N, the second described common mode protection circuit is connected by the first gas discharge tube G1 and piezo-resistance two Z2, piezo-resistance two Z2 one end connect the tie point of the first gas discharge tube G1 and piezo-resistance one Z1 series connection, the other end of piezo-resistance two Z2 connects live wire L, the first described differential mode protection circuit comprises piezo-resistance three Z3 that are connected between zero line N and live wire L.Because the infringement injury that the sudden change of the instantaneous voltage of electric power supply system may cause circuit.When high-tension electricity comes, the resistance of piezo-resistance reduces and electric current is shunted, and prevents that the plug connector of Vehicle Controller from even damaging because being subject to the interference of excessive instantaneous voltage.Due in differential mode situation, clamp voltage on piezo-resistance one Z1 adds that the clamp voltage on piezo-resistance two Z2 can be higher, be unfavorable for the EMC protection of rear class, therefore by increasing piezo-resistance three Z3, as differential mode, protect, with this, reduce the clamp voltage in differential mode situation.In common mode protection situation, adopt piezo-resistance series connection gas discharge tube, in the mode that directly adopts piezo-resistance to be connected with ground wire, in the situation that piezo-resistance causes short-circuit failure because of aging or thunderbolt, power supply is short-circuited with between ground wire, can cause personnel's electric shock accidents.The form of employing piezo-resistance series connection gas discharge tube can be avoided the generation of electric shock accidents to greatest extent, because the general failure mode of gas discharge tube is for opening circuit, can improve like this safe class of system.
Referring to Fig. 5, described Vehicle Controller outside is surrounded by a rack 5, rack 5 openings are arranged on the positive facade of rack 5, pcb board card 1 be arranged in rack 5 and the interface of pcb board card 1 towards rack 5 openings, described connector 2 is longitudinally plugged on the interface of pcb board card 1, below connector 2, be provided with a copper bar 12, shielded type cable and unshielded cable are connected on connector by copper bar 12, the shielding layer grounding of described shielded type cable.Connector 2 is longitudinally placed, and can dwindle the width of rack in the situation that placing equal number connector.Rack 5 footing are provided with for introducing the pull box 6 of shielded type cable 3, shielded type cable 3 in pull box 6 is introduced racks 5 and described shielded type cable 3 go back connection member EMC protector.By structural member EMC protector, eliminate because instantaneous pressure produces the device damage causing, guarantee the normal work of equipment.
As a kind of preferred implementation, referring to Fig. 5 and Fig. 6, described structural member EMC protector comprises the earthing rod 8 being arranged on rack lower surface, the screen of the shielded type cable 3 in pull box 6 is connected on earthing rod 8 through earth connection 9, described shielded type cable 3 is gripped by cable clamp 7 with the junction of earth connection 9, described cable clamp 7 ground connection also described pull box 6 in.By earthing rod 8, by the instantaneous pressure ground connection of causing because of thunderbolt or spread of voltage etc. on shielded type cable, eliminate the damage that instantaneous pressure causes.
Above-mentioned I/O port EMC module and power port EMC module are all arranged on pcb board card, by the backboard of pcb board card, power.Described structural member EMC protector is as the one-level protection of Vehicle Controller, and erasure signal is by shielded type cable electromagnetic interference signal shielded type cable when outside is inputted.I/O port EMC module and power port EMC module are protected as secondary, electromagnetic interference signal during erasure signal access connector and the electromagnetic interference signal of power port.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.
Claims (10)
1. the EMC protector of a Vehicle Controller, comprise at least two pcb board cards (1) and assign into the connector (2) on pcb board card (1), described connector (2) is provided with I/O port, I/O port on different connector (2) is used for connecting shielded type cable (3) or the unshielded cable (4) of transmission of data signals, it is characterized in that: described unshielded cable (4) or shielded type cable (3) the I/O port described in connecting is provided with I/O port EMC module, and described I/O port EMC module is arranged on pcb board card (1).
2. the EMC protector of Vehicle Controller according to claim 1, it is characterized in that: described I/O port EMC module comprises single line EMC module and difference EMC module, unshielded cable (4) connects connector (2) I/O port to the single line EMC module on pcb board card, and shielded type cable (3) connects connector (2) I/O port to the difference EMC module on pcb board card.
3. the EMC protector of Vehicle Controller according to claim 2, it is characterized in that: the shielding layer grounding that is connected to the shielded type cable (3) on connector (2), the signal of described shielded type cable is divided into difference positive pole and difference negative pole, described difference EMC module comprises the 4th common mode protection circuit between the 3rd common mode protection circuit, difference negative pole and the ground wire being arranged between difference positive pole and ground wire, and the second differential mode protection circuit that is connected to difference positive pole and difference negative pole.
4. the EMC protector of Vehicle Controller according to claim 3, it is characterized in that: the 3rd described common mode protection circuit comprises the second gas discharge tube (G2), described the second gas discharge tube (G2) is connected to difference positive pole, between difference negative pole, between difference positive pole and ground wire, be connected with a TVS pipe (T1), one end anodal in difference and TVS pipe (T1) is also connected with the first resistance (R1), the other end of the one TVS pipe (T1) is connected on the second gas discharge tube (G2), the 4th common mode protection circuit comprises the 2nd TVS pipe (T2) being connected between difference positive pole and ground wire, one end at shielded type cable negative pole and the 2nd TVS pipe (T2) is also connected with the second resistance (R2), the other end of the 2nd TVS pipe (T2) is connected on the second gas discharge tube (G2), the second gas discharge tube (G2), the first resistance (R1), the second resistance (R2) and the 3rd TVS pipe (T3) being connected between difference positive pole and difference negative pole connect and compose the second differential mode protection circuit.
5. the EMC protector of Vehicle Controller according to claim 2, it is characterized in that: described single line EMC module comprises piezo-resistance four (Z4) and the 4th TVS pipe (T4) being arranged between unshielded cable (4) signal and ground wire, and unshielded cable (4) is connected to the 4th TVS pipe (T4) through the 3rd resistance (R3).
6. the EMC protector of Vehicle Controller according to claim 1, it is characterized in that: on pcb board card (1), be provided with the backboard that is used to connector (2) and pcb board card (1) power supply, power line connects power port EMC module, by power port EMC module, is connected to backboard.
7. the EMC protector of Vehicle Controller according to claim 6, it is characterized in that: described power port EMC module comprises and is connected to the zero line (N) of power supply and the second common mode protection circuit between the first common mode protection circuit between ground wire, live wire (L) and ground wire, and the first differential mode protection circuit between live wire (L) and zero line (N), also comprise the first-level filtering wave circuit (10) and the secondary filter circuit (11) that are connected between zero line (N) and live wire (L), described first-level filtering wave circuit (10) is connected with secondary filter circuit (11).
8. the EMC protector of Vehicle Controller according to claim 7, it is characterized in that: the first described common mode protection circuit is by the first gas discharge tube (G1) and piezo-resistance one (Z1) series connection, one end of the first gas discharge tube (G1) connects ground wire (9), one end of piezo-resistance connects zero line (N), the second described common mode protection circuit is by the first gas discharge tube (G1) and piezo-resistance two (Z2) series connection, piezo-resistance two (Z2) one end connects the tie point of the first gas discharge tube (G1) and piezo-resistance one (Z1) series connection, the other end of piezo-resistance two (Z2) connects live wire (L), the first described differential mode protection circuit comprises the piezo-resistance three (Z3) being connected between zero line (N) and live wire (L).
9. the EMC protector of Vehicle Controller according to claim 1 and 2, it is characterized in that: also comprise a rack (5), rack (5) opening is arranged on the positive facade of rack (5), pcb board card (1) be arranged in rack (5) and the interface of pcb board card (1) towards rack (5) opening, described connector (2) is longitudinally plugged on the interface of pcb board card (1), rack (5) footing is provided with the pull box (6) for introducing shielded type cable (3), shielded type cable (3) in pull box (6) is introduced rack (5) and described shielded type cable (3) go back connection member EMC protector.
10. the EMC protector of Vehicle Controller according to claim 9, it is characterized in that: described structural member EMC protector comprises the earthing rod (8) being arranged on rack lower surface, the screen of the shielded type cable (3) in pull box (6) is connected on earthing rod (8) through earth connection (9), the junction of described shielded type cable (3) and earth connection (9) is gripped by cable clamp (7), described cable clamp (7) ground connection also described pull box (6) in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048832.6U CN203722228U (en) | 2014-01-24 | 2014-01-24 | EMC protection device of vehicle-mounted controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048832.6U CN203722228U (en) | 2014-01-24 | 2014-01-24 | EMC protection device of vehicle-mounted controller |
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| Publication Number | Publication Date |
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| CN203722228U true CN203722228U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420048832.6U Expired - Lifetime CN203722228U (en) | 2014-01-24 | 2014-01-24 | EMC protection device of vehicle-mounted controller |
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| CN (1) | CN203722228U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866461A (en) * | 2016-05-20 | 2016-08-17 | 宁波佳明测控技术有限公司 | Speed test device for integrated sensor of CRH (China railway high-speed) 5 |
| CN113889995A (en) * | 2021-10-09 | 2022-01-04 | 富芯微电子有限公司 | Automobile instantaneous high-voltage protection sensing circuit |
-
2014
- 2014-01-24 CN CN201420048832.6U patent/CN203722228U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866461A (en) * | 2016-05-20 | 2016-08-17 | 宁波佳明测控技术有限公司 | Speed test device for integrated sensor of CRH (China railway high-speed) 5 |
| CN113889995A (en) * | 2021-10-09 | 2022-01-04 | 富芯微电子有限公司 | Automobile instantaneous high-voltage protection sensing circuit |
| CN113889995B (en) * | 2021-10-09 | 2024-04-16 | 富芯微电子有限公司 | Automobile instantaneous high-voltage protection sensing circuit |
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Address after: 310052 Binjiang District, Hangzhou, Jianghan Road, No. 1785, Shuangcheng international building, floor 17, No. 4 Patentee after: UNITTEC Co.,Ltd. Address before: 310000 Hangzhou science and Technology Park, high tech Zone, Zhejiang venture Road, No. 8 Patentee before: ZHEJIANG UNITED MECHANICAL & ELECTRICAL CO.,LTD. |
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Granted publication date: 20140716 |
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| CX01 | Expiry of patent term |