CN202093414U - Current output circuit for electric actuating mechanism - Google Patents
Current output circuit for electric actuating mechanism Download PDFInfo
- Publication number
- CN202093414U CN202093414U CN2011201786329U CN201120178632U CN202093414U CN 202093414 U CN202093414 U CN 202093414U CN 2011201786329 U CN2011201786329 U CN 2011201786329U CN 201120178632 U CN201120178632 U CN 201120178632U CN 202093414 U CN202093414 U CN 202093414U
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- chip
- current output
- digital
- signal
- amplifying circuit
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Abstract
The utility model relates to a current output circuit for an electric actuating mechanism. The current output circuit comprises a digital isolation chip, a current output chip and an amplifying circuit, wherein the external digital signal is input to the digital isolation chip and then input to the current output chip after the isolation conversion through the digital isolation chip, the current output chip converts the input digital signal into the low-power analog signal and then outputs the low-power analog signal to the amplifying circuit, meanwhile, the digital isolation chip outputs the status detection signal outward, and the amplifying circuit outputs the amplified analog signal. In the utility model, the current output circuit has a reasonable design, is mainly composed of an AD5420 current output chip, has the characteristics of high reliability, high precision and strong anti-interference ability, is convenient to maintain and the like.
Description
Technical field
The utility model belongs to industrial instrumentation instrument field, especially a kind of current output circuit that is used for electric operator.
Background technology
Electric operator is the terminal actuating equipment in the industrial process control system, it mainly acts on is that control signal with upper computer control system is sent converts corresponding action to, reach the position of closure member in the by-pass valve control or the purpose of other governor motion positions, be widely used in industries such as electric power, metallurgy, petrochemical industry, heat supply, cement, building materials, light textile, food.At present, the feedback current signal of electric operator adopts the output circuit that is made of electronic devices and components to export usually, the current output circuit that is made of electronic devices and components has lower-cost characteristics, and is still, all relatively poor at reliability, degree of accuracy, antijamming capability at current output circuit.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of good reliability, precision height, the current output circuit that is used for electric operator that antijamming capability is strong are provided.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of current output circuit that is used for electric operator, comprise digital isolating chip, electric current pio chip and amplifying circuit, external digital signal is input to digital isolating chip and is input to the electric current pio chip after digital isolating chip is isolated conversion, the electric current pio chip is converted to the digital signal of input low power simulating signal and exports to amplifying circuit, simultaneously state detection signal is outwards exported by digital isolating chip, amplifying circuit is exported amplified analog signal.
And described digital isolating chip adopts the ADUM1401 chip, and described electric current pio chip adopts the AD5420 chip, and described amplifying circuit is the power amplification transistor circuit.
And described external digital signal is connected by first connection terminal numeral isolating chip, and described state detection signal is outwards exported by first connection terminal, and described amplifying circuit is outwards exported amplified analog signal by second connection terminal.
Advantage of the present utility model and good effect are:
1, this current output circuit serves as that main the structure forms with special-purpose electric current pio chip AD5420, because the AD5420 chip has stronger antijamming capability, especially more remarkable to the antijamming capability of less radio-frequency (for example working site workpeople use intercom), guaranteed that current output circuit reliablely and stablely works.
2, this current output circuit adopts modular design, when the electric current output of electric operator breaks down, only needs to change corresponding electric current output module and gets final product, and has greatly made things convenient for on-the-spot maintenance job.
3, the utility model is reasonable in design, and it is strong and be convenient to characteristics such as maintenance to have a good reliability, precision height, antijamming capability.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described:
A kind of current output circuit that is used for electric operator, as shown in Figure 1, by digital isolating chip, the electric current pio chip, amplifying circuit, first connection terminal, second connection terminal connects and composes, external digital signal is input to digital isolating chip through first connection terminal, after isolating conversion to the digital signal of outside, the numeral isolating chip enters the electric current pio chip, the electric current pio chip converts low power simulating signal to and exports to amplifying circuit the digital signal of input, simultaneously state detection signal is outputed on the digital isolating chip and by first connection terminal and outwards export, amplifying circuit amplifies low power simulating signal and amplified analog signal is outwards exported through second connection terminal.
In the present embodiment, digital isolating chip adopts the special-purpose electric current pio chip ADUM1401 of ADI company, and the electric current pio chip adopts the AD5420 chip, and amplifying circuit is the power amplification transistor circuit.
The course of work of the present utility model is as follows:
1, the digital signal (LATCH, SCK, DATAIN) from the outside enters digital isolating chip ADUM1401 through first connection terminal (J1).
2, digital isolating chip ADUM1401 isolates conversion to digital signal, and the digital signal (LATCH2, SCK2, DATAIN2) after the conversion enters electric current pio chip AD5420.
3, electric current pio chip AD5420 converts the digital signal of input to low power simulating signal, and exports to power amplification triode D1 by output pin (19 pin); Electric current pio chip AD5420 exports to digital isolating chip ADUM1401 with status monitoring signal (DATAOUT2) simultaneously, and the status monitoring signal (DATAOUT) after digital isolating chip ADUM1401 will change is exported to first connection terminal (J1).
4, the power amplification triode D1 in the amplifying circuit exports to second connection terminal (J2) with amplified analog signal (FEEDBACK).
It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (3)
1. current output circuit that is used for electric operator, it is characterized in that: comprise digital isolating chip, electric current pio chip and amplifying circuit, external digital signal is input to digital isolating chip and is input to the electric current pio chip after digital isolating chip is isolated conversion, the electric current pio chip is converted to the digital signal of input low power simulating signal and exports to amplifying circuit, simultaneously state detection signal is outwards exported by digital isolating chip, amplifying circuit is exported amplified analog signal.
2. a kind of current output circuit that is used for electric operator according to claim 1, it is characterized in that: described digital isolating chip adopts the ADUM1401 chip, described electric current pio chip adopts the AD5420 chip, and described amplifying circuit is the power amplification transistor circuit.
3. a kind of current output circuit that is used for electric operator according to claim 1 and 2, it is characterized in that: described external digital signal is connected by first connection terminal numeral isolating chip, described state detection signal is outwards exported by first connection terminal, and described amplifying circuit is outwards exported amplified analog signal by second connection terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201786329U CN202093414U (en) | 2011-05-31 | 2011-05-31 | Current output circuit for electric actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201786329U CN202093414U (en) | 2011-05-31 | 2011-05-31 | Current output circuit for electric actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202093414U true CN202093414U (en) | 2011-12-28 |
Family
ID=45368470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201786329U Expired - Fee Related CN202093414U (en) | 2011-05-31 | 2011-05-31 | Current output circuit for electric actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202093414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425017A (en) * | 2015-12-31 | 2016-03-23 | 天津宝恒流体控制设备股份有限公司 | Current output detecting system for electric actuator |
-
2011
- 2011-05-31 CN CN2011201786329U patent/CN202093414U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425017A (en) * | 2015-12-31 | 2016-03-23 | 天津宝恒流体控制设备股份有限公司 | Current output detecting system for electric actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20140531 |