CN2221033Y - Switching power source constant potential anticorrosive instrument - Google Patents
Switching power source constant potential anticorrosive instrument Download PDFInfo
- Publication number
- CN2221033Y CN2221033Y CN 94223666 CN94223666U CN2221033Y CN 2221033 Y CN2221033 Y CN 2221033Y CN 94223666 CN94223666 CN 94223666 CN 94223666 U CN94223666 U CN 94223666U CN 2221033 Y CN2221033 Y CN 2221033Y
- Authority
- CN
- China
- Prior art keywords
- termination
- ground connection
- circuit
- signal impedance
- sampled signal
- 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
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a constant potential anticorrosive instrument using the switch power supply for a cathode protection method. The utility model is additionally provided with a sampled signal impedance convertor 5 composed of an R1, a C1 and an IC 1, a pulse width regulating circuit 6 composed of an R2, a C2 and an IC2, a given signal impedance convertor 7 composed of R3 to R5, C3 to C5 and IC3 to IC4 and a current transducer I/V. The sampled signal V0 is sampled from the I/V and the given signal V1 comes from a computer. The output voltage and the current of the utility model can be regulated within a large scope, once regulated, the output voltage and the current are constant for a long time. Compared with the thyristor rectifying power supply, the establishment of the guard potential is fast, the precision is improved and the electric energy is saved more than twice.
Description
The permanent electric protection instrument of switch power supply type belongs to monitoring instrument.
What existing constant potential anti-corrosion meter adopted is silicon controlled rectification power source, and its voltage-regulation coefficient, laod stability, efficient all are not so good as switching power supply, and its power consumption, volume, weight are all big than switch power supply, especially as its poor effect of constant potential anti-corrosion meter.
The purpose of this utility model be for switch power supply as anti-corrosion meter, and increased the measure of constant potential, continuous current, its preservative effect is improved.
The utility model comprises driving circuit 4, circuit for power conversion 2, high-voltage rectifying filtering circuit 1, lower pressure rectifier filtering circuit 3.It is characterized in that it also includes current transducer I/V, sampled signal impedance transformer 5, given signal impedance umformer 7, pulse-width modulation circuit 6.Sampled signal V
0Take from current transducer I/V, sampled signal impedance transformer 5 is by R
1, C
1, operational amplifier IC
1Form.V
0Signal wire meets R
1An end, R
1The other end and C
1An end and IC
1In-phase input end join C
1The other end ground connection.IC
1Inverting input link to each other with its output terminal.Pulse-width modulation circuit 6 is by R
2, C
2, pulse width modulating chip IC
2Form.R
2A termination IC
1Output terminal, R
2The other end and C
2An end and IC
2In error amplifier IC
21In-phase input end join C
2The other end ground connection, IC
2The input terminus of output termination driving circuit 4.Given signal impedance umformer 7 is by R
3, C
3, R
4, C
4, R
5, C
5, operational amplifier IC
3, IC
4Form.R
3The given signal wire V of one termination
1, R
3Another termination C
3An end and IC
3In-phase input end, C
3The other end ground connection, IC
3Inverting input connect its output terminal.IC
3Output termination R
4An end.R
4Another termination C
4An end and IC
4In-phase input end, C
4The other end ground connection, IC
4Inverting input connect its output terminal.IC
4Output termination R
5An end, R
5Another termination C
5An end and IC
2In error amplifier IC
21Inverting input, C
5The other end ground connection.
As given signal V from computer
1During increase, V
2, V
3All be to follow increase, through IC
2Make δ also increase (dutycycle that δ is pulse width), so outward current I also increases, vice versa.If given signal V
1Constant, then I is also constant.
The utility model has been applied to switch power supply on the constant potential anti-corrosion meter of cathode protection method; make its output voltage; electric current is adjustable on a large scale, and (volts DS is at 5～36v; galvanic current is 5～20A); once constant output for a long time again after setting up; compare with the silicon controlled rectification power source anti-corrosion meter; setting up the time of protection potential accelerates; control accuracy improve greatly (reach ± 20mv); preservative effect is obviously got better; the saves energy effect is enhanced about more than once, and can save noble metal silicon steel, copper etc. again.
Fig. 1 is a whole schematic diagram of the present utility model, and Fig. 2 is the circuit structure diagram of current transducer I/V, sampled signal impedance transformer 5, given signal impedance umformer 7, pulse-width modulation circuit 6.
Embodiment: present embodiment is by driving circuit 4, circuit for power conversion 2, high-voltage rectifying filtering circuit 1, lower pressure rectifier filtering circuit 3.Current transducer I/V, sampled signal impedance transformer 5, given signal impedance umformer 7, pulse-width modulation circuit 6 are formed.Sampled signal V
0Take from current transducer I/V, sampled signal impedance transformer 5 is by R
1, C
1, operational amplifier IC
1Form, given signal impedance umformer 7 is by R
3, R
4, R
5, C
3, C
4, C
5, operational amplifier IC
3, IC
4Form.IC
1, C
3, IC
4Select for use LM324 or LM339 all can.Pulse-width modulation circuit 6 is by R
2, C
2, pulse width modulating chip IC
2Form IC
2Select for use TL494 or TL3524, TL3525 all can.And driving circuit 4, circuit for power conversion 2, high-voltage rectifying filtering circuit 1, lower pressure rectifier filtering circuit 3 all belong to prior art, repeat no more.Current transducer I/V selects CDL-HE-B for use.
Claims (1)
1, switch power supply type constant potential anti-corrosion meter, it comprises driving circuit (4), circuit for power conversion (2), high-voltage rectifying filtering circuit (1), lower pressure rectifier filtering circuit (3), it is characterized in that it also comprises current transducer I/V.Sampled signal impedance transformer (5), given signal impedance umformer (7), pulse-width modulation circuit (6), sampled signal V
0Take from current transducer I/V, sampled signal impedance transformer (5) is by R
1, C
1, operational amplifier IC
1Form V
0Signal wire meets R
1An end, R
1The other end and C
1An end and IC
1In-phase input end join C
1The other end ground connection, IC
1Inverting input link to each other with its output terminal; Pulse-width modulation circuit (6) is by R
2, C
2, pulse width modulating chip IC
2Form R
2A termination IC
1Output terminal, R
2The other end and C
2An end and IC
2In error amplifier IC
21In-phase input end join C
2The other end ground connection, IC
2The input terminus of output termination driving circuit (4); Given signal impedance umformer (7) is by R
3, C
3, R
4, C
4, R
5, C
5, operational amplifier IC
3, IC
4Form R
3One termination given line V
1, R
3Another termination C
3An end and IC
3In-phase input end, C
3The other end ground connection, IC
3Inverting input connect its output terminal; IC
3Output termination R
4An end, R
4Another termination C
4An end and IC
4In-phase input end, C
4The other end ground connection, IC
4Output termination R
5An end, R
5Another termination C
5An end and IC
2In error amplifier IC
21Inverting input, C
5The other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94223666 CN2221033Y (en) | 1994-12-19 | 1994-12-19 | Switching power source constant potential anticorrosive instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94223666 CN2221033Y (en) | 1994-12-19 | 1994-12-19 | Switching power source constant potential anticorrosive instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2221033Y true CN2221033Y (en) | 1996-02-28 |
Family
ID=33837297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94223666 Expired - Fee Related CN2221033Y (en) | 1994-12-19 | 1994-12-19 | Switching power source constant potential anticorrosive instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2221033Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719828A (en) * | 2012-07-02 | 2012-10-10 | 中交四航工程研究院有限公司 | Constant-current intermittent cathodic protection and corrosion acceleration system and implementation method thereof |
-
1994
- 1994-12-19 CN CN 94223666 patent/CN2221033Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719828A (en) * | 2012-07-02 | 2012-10-10 | 中交四航工程研究院有限公司 | Constant-current intermittent cathodic protection and corrosion acceleration system and implementation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |