CN202550527U - Special driver 485 communication circuit for intelligent motor - Google Patents
Special driver 485 communication circuit for intelligent motor Download PDFInfo
- Publication number
- CN202550527U CN202550527U CN2012200854855U CN201220085485U CN202550527U CN 202550527 U CN202550527 U CN 202550527U CN 2012200854855 U CN2012200854855 U CN 2012200854855U CN 201220085485 U CN201220085485 U CN 201220085485U CN 202550527 U CN202550527 U CN 202550527U
- Authority
- CN
- China
- Prior art keywords
- protective circuit
- chip
- circuit
- chips
- communication interface
- 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.)
- Expired - Fee Related
Links
- 230000006854 communication Effects 0.000 title claims abstract description 35
- 238000004891 communication Methods 0.000 title claims abstract description 34
- 230000001681 protective effect Effects 0.000 claims abstract description 31
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 claims description 3
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 claims description 3
- 102100021133 Nuclear protein 1 Human genes 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 4
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
Images
Landscapes
- Dc Digital Transmission (AREA)
Abstract
The utility model relates to a special driver 485 communication circuit for an intelligent motor and belongs to the field of the communication circuit of a control system. The communication circuit comprises a 485 chip and a communication interface, and is characterized in that a protective circuit is arranged between the 485 chip and the communication interface, and the protective circuit is connected to a signal wire between the 485 chip and the communication interface. When the communication interface is surged, the 485 chip and external circuits thereof can be protected through the protective circuit, the signal accuracy is improved, and the operation and the signal transmission of the intelligent motor are guaranteed. Because an enhanced RS-485 chip with isolation is adopted, a magnetic coupling isolation technology is adopted in the chip and the protective circuit is arranged, the communication circuit disclosed by the utility model is superior to a circuit in an optical coupler mode in various aspects such as power consumption, size, integration level, and speed, and particularly the quality stability is ensured.
Description
Technical field
The utility model provides a kind of intelligent motor special purpose driver 485 telecommunication circuits, belongs to control system telecommunication circuit field.
Background technology
Because motor and driver itself can produce many interference, though still there is defective in the extensive use of RS-485 circuit at aspects such as anti-interference, self adaptation, communication efficiencies in communication process; When adopting the RS485 mode to communicate between equipment such as PLC and the driver, often be easy to generate communication disruption, error code, deadlock, even the RS485 interface such as is burnt out at fault; And the driver of networking is many more, and this phenomenon takes place more easily.
Traditional design; Like 485 chips, add photoelectrical coupler, this mode adopts dual power supply; Isolate fully; Effectively suppressed the generation of high common-mode voltage, but have also that the circuit volume is excessive, circuit is loaded down with trivial details, discrete device is too much, transmission rate receives shortcomings such as photoelectric device restriction, the inconsistent communication of photoelectric device parameter make mistakes, and the stability of whole system is also had certain influence.
The utility model content
According to above deficiency of the prior art, the problem that the utility model will solve is: a kind of intelligent electric machine control, intelligent motor special purpose driver 485 telecommunication circuits that reliability is high of being applied to are provided.
The utility model solves the technical scheme that its technical problem adopted: intelligent motor special purpose driver 485 telecommunication circuits; Comprise 485 chips and communication interface; It is characterized in that: between 485 chips and the communication interface protective circuit is set, protective circuit is connected on the holding wire between 485 chips and the communication interface.
Owing to be provided with protective circuit, when surge appears in communication interface, can protect 485 chips and peripheral circuit thereof through protective circuit, improve the signal accuracy, ensure intelligent electric machine operation and signal transmission.
Wherein preferred version is:
Described protective circuit is made up of the TVS pipe, and the input of protective circuit connects the COM1 of 485 chips, the output head grounding of protective circuit.
Described protective circuit is by unidirectional TVS pipe D1, D2 differential concatenation; Constitute the first two-way TVS pipe; Unidirectional TVS D3, D4 differential concatenation; Form the second two-way TVS pipe, the communication terminal A pin of 485 chips is connected the second two-way TVS pipe with the Y pin, and the communication terminal B pin of 485 chips is connected the first two-way TVS pipe with the Z pin.
The beneficial effect that intelligent motor special purpose driver 485 telecommunication circuits of the utility model are had is: form protective circuit through between 485 chips and communication interface, being provided with by the TVS pipe; Protective circuit is connected on the holding wire between 485 chips and the communication interface; When surge appears in communication interface; Can protect 485 chips and peripheral circuit thereof through protective circuit, improve the signal accuracy, ensure intelligent electric machine operation and signal transmission.Because the enhancement mode RS-485 chip that has adopted band to isolate; Chip internal adopts magnetic coupling isolation technology; Be different from traditional photoelectrical coupler; And the loading protective circuit, therefore be superior to the circuit of optical coupler mode at everyways such as power consumption, volume, integrated level, speed, especially quality stability is guaranteed.
Description of drawings
Fig. 1 is the electrical principle block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model;
Wherein: U1,485 chip R1-R5, resistance D1-D4, TVS pipe J1, communication interface.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done and to further describe:
Embodiment 1:
As shown in Figure 1, between 485 chips and the communication interface protective circuit is set, protective circuit is connected on the holding wire between 485 chips and the communication interface.Owing to be provided with protective circuit, when high voltage surge appears in communication interface, can protect 485 chips and peripheral circuit thereof through protective circuit, improve the signal accuracy, ensure intelligent electric machine operation and signal transmission.
As shown in Figure 2, protective circuit is made up of TVS pipe D1-D4, and the input of protective circuit connects the COM1 of 485 chip U1, the output head grounding of protective circuit.
Protective circuit is by unidirectional TVS pipe D1, D2 differential concatenation; Constitute the first two-way TVS pipe, unidirectional TVS D3, D4 differential concatenation form the second two-way TVS pipe; The communication terminal A pin of 485 chips is connected the second two-way TVS pipe with the Y pin, the communication terminal B pin of 485 chips is connected the first two-way TVS pipe with the Z pin.
Operation principle and use:
The built-in magnetic coupler of 485 chip U1; Built-in a triple channel isolator, a ternary differential line driver, a difference input receiver and a DC/DC transducer; Single power supply; 2500V isolation voltage, complete/half-duplex, transmission rate 500K, common-mode voltage suppress ability 25KV/ μ S, ± esd protection of 15KV.
Because RS-485 standard code receiver thresholding be ± 200mV, when bus voltage during in ± 200mV centre the receiver output state uncertain.Because UART triggers with one leading " 0 " and once receives action, so the not stationary state of receiver may make UART receive some data by error, causes system's misoperation.So the A pin of 485 chip U1, B pin are provided with pull-up resistor R1, pull down resistor R3 respectively, between A pin and the B pin resistance R 2 is set, to avoid this nondeterministic statement as far as possible.
The RS-485 bus for and connect formula two-wire system interface; In case one the 485 breakdown short circuit of chip is arranged; Therefore just possibly influence the communication of whole bus, connected respectively two resistance R 4, R5 and buses of 485 chip U1 outputs are isolated, and avoid hardware fault to influence the communication of whole bus.
Common-mode voltage surpasses-7V or+during 12V, then can damage the RS485 interface, disturb in order to eliminate line surge, prevent that perhaps high voltage from damaging 485 chips, use the TVS pipe and formed the absorption protective circuit.
Claims (3)
1. intelligent motor special purpose driver 485 telecommunication circuits comprise 485 chips and communication interface, and it is characterized in that: between 485 chips and the communication interface protective circuit is set, protective circuit is connected on the holding wire between 485 chips and the communication interface.
2. intelligent motor special purpose driver 485 telecommunication circuits according to claim 1 is characterized in that: described protective circuit is made up of the TVS pipe, and the input of protective circuit connects the COM1 of 485 chips, the output head grounding of protective circuit.
3. intelligent motor special purpose driver 485 telecommunication circuits according to claim 1; It is characterized in that: described protective circuit is by unidirectional TVS pipe D1, D2 differential concatenation; Constitute the first two-way TVS pipe, unidirectional TVS D3, D4 differential concatenation form the second two-way TVS pipe; The communication terminal A pin of 485 chips is connected the second two-way TVS pipe with the Y pin, the communication terminal B pin of 485 chips is connected the first two-way TVS pipe with the Z pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200854855U CN202550527U (en) | 2012-03-08 | 2012-03-08 | Special driver 485 communication circuit for intelligent motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200854855U CN202550527U (en) | 2012-03-08 | 2012-03-08 | Special driver 485 communication circuit for intelligent motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202550527U true CN202550527U (en) | 2012-11-21 |
Family
ID=47171096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200854855U Expired - Fee Related CN202550527U (en) | 2012-03-08 | 2012-03-08 | Special driver 485 communication circuit for intelligent motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202550527U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253486A (en) * | 2014-09-30 | 2014-12-31 | 杭州天目电力科技有限公司 | Communication adapter |
| CN104579419A (en) * | 2015-01-28 | 2015-04-29 | 国家电网公司 | Signal enhancement equipment applied to RS-485 communication system |
| CN107122322A (en) * | 2017-05-05 | 2017-09-01 | 吉林瑞科汉斯电气股份有限公司 | A kind of communication means for improving two-wire system RS 485 |
-
2012
- 2012-03-08 CN CN2012200854855U patent/CN202550527U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253486A (en) * | 2014-09-30 | 2014-12-31 | 杭州天目电力科技有限公司 | Communication adapter |
| CN104579419A (en) * | 2015-01-28 | 2015-04-29 | 国家电网公司 | Signal enhancement equipment applied to RS-485 communication system |
| CN104579419B (en) * | 2015-01-28 | 2017-05-24 | 国家电网公司 | Signal enhancement equipment and RS-485 communication system |
| CN107122322A (en) * | 2017-05-05 | 2017-09-01 | 吉林瑞科汉斯电气股份有限公司 | A kind of communication means for improving two-wire system RS 485 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202475455U (en) | Ethernet interface protection circuit | |
| CN206181051U (en) | RS485 communication circuit | |
| CN102611091A (en) | Lightning stroke prevention surge test protection circuit for electronic equipment | |
| CN202550527U (en) | Special driver 485 communication circuit for intelligent motor | |
| CN202696137U (en) | Protective circuit for RS485 interface of computer | |
| CN205666852U (en) | MiniPCieCAN interface converting device | |
| CN202841176U (en) | Embedded isolation RS-485 transceiver module | |
| CN206480146U (en) | Distant communication circuit based on electric energy meter | |
| CN203492004U (en) | Photoelectric isolation protection circuit of RS485 bus | |
| CN207319225U (en) | A kind of iic bus circuit with isolation features | |
| CN203466962U (en) | Audio port identification circuit and communication device | |
| CN204965416U (en) | RS485 bus serial ports device | |
| CN205195256U (en) | Surge and pulse group suppression circuit | |
| CN108646626A (en) | A kind of mobile unit control signal transmission protection system | |
| CN202550946U (en) | 485 communication circuit for driver special for switch reluctance motor | |
| CN204304165U (en) | Usb adapter | |
| CN103442317A (en) | Audio port identification circuit, audio port identification method and communication device | |
| CN204304421U (en) | The protective circuit of underground coal mine RS485 communication line | |
| CN208316749U (en) | A kind of RS485 bus communication circuit based on transformer | |
| CN207319794U (en) | A kind of I for strengthening antijamming capability2C buses | |
| CN202435396U (en) | RS485 (recommended standard 485) communication circuit | |
| CN103344801B (en) | Power line carrier communication isolation device for intelligent electric meter | |
| CN206149237U (en) | Multichannel differential signal changes TTL level signal's conversion and protection system | |
| CN206790086U (en) | Interface protection circuit and equipment interface | |
| CN104953574A (en) | Lightning arrester specialized for intercommunication entrance machine of building |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: DONG YIPENG LI YAN LI MINGXIAN Effective date: 20131217 Owner name: ZIBO JINGKE ELECTRIC INSTITUTE Free format text: FORMER OWNER: GUO YUANSHENG Effective date: 20131217 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 721000 BAOJI, SHAANXI PROVINCE TO: 255086 ZIBO, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131217 Address after: 255086 A hi tech Pioneer Park, 135 hi tech Zone, Shandong, Zibo Province, 306 Patentee after: Zibo Jingke Electric Research Institute Address before: 721000 Baoji province Shaanxi City Jintai District Baofu Road No. 102 Building No. 14 5 Patentee before: Guo Yuansheng Patentee before: Dong Yipeng Patentee before: Li Yan Patentee before: Li Mingxian |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20210308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |