CN201947159U - Trigger detection circuit for low-voltage high-current photoelectricity-triggered thyristor - Google Patents
Trigger detection circuit for low-voltage high-current photoelectricity-triggered thyristor Download PDFInfo
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- CN201947159U CN201947159U CN 201020656926 CN201020656926U CN201947159U CN 201947159 U CN201947159 U CN 201947159U CN 201020656926 CN201020656926 CN 201020656926 CN 201020656926 U CN201020656926 U CN 201020656926U CN 201947159 U CN201947159 U CN 201947159U
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- thyristor
- signal
- detection circuit
- photoelectricity
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Abstract
The utility model relates to a trigger detection circuit for a low-voltage high-current photoelectricity-triggered thyristor, which comprises a fuse state detection circuit, a thyristor conducting state detection circuit, a power supply state detection circuit and a trigger circuit. The fuse state detection circuit comprises a photoelectricity isolation circuit and an oscillation circuit which are connected in sequence; the thyristor conducting state detection circuit comprises a signal isolation circuit and a signal processing circuit which are connected in sequence; and the power supply state detection circuit comprises a power supply monitoring circuit and a photoelectricity isolation circuit which are connected with each other. The trigger detection circuit can be used to detect the state of a parallel branch fuse, the conducting state of the thyristor and the power supply state of a trigger plate when the thyristor is triggered, has higher work stability and strong capacity of resisting disturbance, is simple in structure and consumes less energy.
Description
Technical field
The utility model relates to the detection trigger circuit that a kind of 2kV is following, the photoelectricity of 100kA grade triggers the thyristor valve group, is applied to electric power, metallurgy and all the use photoelectricity thyristors field as core devices.
Background technology
Low-voltage, high-current photoelectricity triggers the electrolysis industry that thyristor needing to be widely used in heavy-duty rectifier, as electrolytic aluminium, cathode copper, electrolytic zinc etc.Because thyristor valve body will bear big electric current usually, need to adopt the parallel connection of a plurality of thyristors to realize.The triggering of thyristor valve group, state-detection are the important component parts in the rectifying device.
In order to save cost, reduce investment, generally be by the various operating states of an optical fiber by the frequency change passback major loop of light signal.And the work that detects various states and be converted to frequency signal is finished by programmable logic devices such as CPLD or FPGA usually.The detection loop hardware designs complexity of this kind method, the anti-interference process difficulty is bigger, needs software programming simultaneously, and the designer is had relatively high expectations, and has increased simultaneously to produce the debugging link, and producing task amount in batches obviously increases.
Summary of the invention
The purpose of this utility model provides a kind of low-voltage, high-current photoelectricity and triggers thyristor detection trigger circuit, can trigger thyristor simultaneously, detect state, the conducting state of thyristor and the power supply status of trigger board of parallel branch fuse, have higher job stability and antijamming capability, circuit structure is simple, and energy consumption is low.
For achieving the above object, the utility model is achieved through the following technical solutions:
Low-voltage, high-current photoelectricity triggers thyristor detection trigger circuit, comprises fuse state testing circuit, thyristor conducting state testing circuit, power state detection circuit, circuits for triggering;
The fuse state testing circuit comprises that photoelectric isolating circuit, oscillating circuit connect successively; Thyristor conducting state testing circuit comprises that signal isolation circuit, signal processing circuit connect successively; The power state detection circuit is connected to form by power supply monitoring circuit, photoelectric isolating circuit;
The fuse state signal is after photoelectric isolating circuit, oscillating circuit are handled, be connected by AND circuit with the thyristor current flows signal after handling through signal isolation circuit, signal processing circuit, this signal and the power supply signal integrated treatment after photoelectricity is isolated, the feedback sensed light signal of output is sent to controller; Controller sends the trigger impulse light signal, behind photoelectric switching circuit, pulse shaping amplification circuit, triggers the thyristor in the major loop.
Described signal processing circuit is connected to form by amplifying circuit, voltage-frequency change-over circuit.
Compared with prior art, the utility model has the advantages that:
1) this testing circuit is simple in structure, can realize multiple measuring ability, is triggering thyristor simultaneously, detect state, the conducting state of thyristor and the power supply status of trigger board of parallel branch fuse, have higher job stability and antijamming capability, circuit structure is simple, and energy consumption is low; Reliability height, low, the easy care of cost.
2) because of having adopted optical fiber to receive trigger impulse,, improved trigger impulse forward position di/dt value, simplified circuit design, improved triggering consistency and stability so cancelled pulse isolation transformer commonly used.
3) this circuit has adopted and the design of major loop equipotential, helps insulation processing, has made full use of the superiority that photoelectricity triggers.
Description of drawings
Fig. 1 is the structured flowchart that low-voltage, high-current photoelectricity triggers thyristor detection trigger circuit;
Fig. 2 is the structured flowchart that low-voltage, high-current photoelectricity triggers thyristor detection trigger embodiment of circuit.
Embodiment
See Fig. 1, Fig. 2, low-voltage, high-current photoelectricity triggers thyristor detection trigger circuit, comprises fuse state testing circuit, thyristor conducting state testing circuit, power state detection circuit, circuits for triggering.
The fuse state testing circuit comprises that photoelectric isolating circuit, oscillating circuit connect successively; Thyristor conducting state testing circuit comprises that signal isolation circuit, amplifying circuit, voltage-frequency change-over circuit connect to form successively; The power state detection circuit is connected to form by power supply monitoring circuit, photoelectric isolating circuit.
The fuse state signal after photoelectric isolating circuit, oscillating circuit are handled, with handle through signal isolation circuit, signal processing circuit after the thyristor current flows signal by Yu Mendianlu ﹠amp; Connect, this signal and the power supply signal integrated treatment after photoelectricity is isolated, the feedback sensed light signal of output is sent to controller; Controller sends the trigger impulse light signal, behind photoelectric switching circuit, pulse shaping amplification circuit, triggers the thyristor in the major loop.Voltage stabilizing circuit is exported one road 18V and two-way 16V by isolating transformer, through behind the rectifying and voltage-stabilizing, output 18V, ± 15V, 5V.
See Fig. 2, oscillating circuit is made up of resistance R 61, resistance R 62, resistance R 17, capacitor C 22, integrated Q21, fuse state just often, 3 pin of integrated Q21 are output as low level; During the fuse fault, the frequency signal about 3 pin of integrated Q21 output 3.2kHz.Amplifying circuit is made up of operational amplifier U31, resistance R 12, resistance R 14, input 0V～4V, output 5V～9V.The voltage-frequency change-over circuit is made up of integrated Q11, resistance R 31, resistance R 41, capacitor C 71, capacitor C 81, imports 5V～9V under the perfect condition, output 50kHz～90kHz.
When fuse state is normal, 3 pin of integrated Q21 are through the processing output high level of NAND gate, again with the 7 pin output signals of integrated Q11 through and door, final detection trigger plate obtains the current value of thyristor branch road.
When the fuse fault, 3 pin of the integrated Q21 frequency signal about through the processing output 3.2kHz of NAND gate, the 7 pin output signal conductively-closeds of integrated Q11 are fallen, through with behind the door, final detection trigger plate obtains the frequency signal about 3.2kHz, can learn that fuse is in off-state.
State-detection priority is: 1, power failure; 2, fuse fault; 3, transistors breakdown.
This low-voltage, high-current photoelectricity triggers current detection accuracy＜1% of thyristor detection trigger circuit; response speed＜50 μ s; fuse state detection＜1.2ms, power state detection＜2ms can both reach the protection requirement of equipment operation; its production, debugging, maintenance cost are lower; less demanding to debugging and attendant, and the designer can adjust the output signal frequency scope flexibly, to reach the more requirement of high accuracy and faster response; be a kind of simple and practical, the reliable detection circuit.
Claims (2)
1. low-voltage, high-current photoelectricity triggers thyristor detection trigger circuit, it is characterized in that, comprises fuse state testing circuit, thyristor conducting state testing circuit, power state detection circuit, circuits for triggering;
The fuse state testing circuit comprises that photoelectric isolating circuit, oscillating circuit connect successively; Thyristor conducting state testing circuit comprises that signal isolation circuit, signal processing circuit connect successively; The power state detection circuit is connected to form by power supply monitoring circuit, photoelectric isolating circuit;
The fuse state signal is after photoelectric isolating circuit, oscillating circuit are handled, be connected by AND circuit with the thyristor current flows signal after handling through signal isolation circuit, signal processing circuit, this signal and the power supply signal integrated treatment after photoelectricity is isolated, the feedback sensed light signal of output is sent to controller; Controller sends the trigger impulse light signal, behind photoelectric switching circuit, pulse shaping amplification circuit, triggers the thyristor in the major loop.
2. low-voltage, high-current photoelectricity according to claim 1 triggers thyristor detection trigger circuit, it is characterized in that described signal processing circuit is connected to form by amplifying circuit, voltage-frequency change-over circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020656926 CN201947159U (en) | 2010-12-13 | 2010-12-13 | Trigger detection circuit for low-voltage high-current photoelectricity-triggered thyristor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020656926 CN201947159U (en) | 2010-12-13 | 2010-12-13 | Trigger detection circuit for low-voltage high-current photoelectricity-triggered thyristor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201947159U true CN201947159U (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020656926 Expired - Lifetime CN201947159U (en) | 2010-12-13 | 2010-12-13 | Trigger detection circuit for low-voltage high-current photoelectricity-triggered thyristor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201947159U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253331A (en) * | 2011-04-19 | 2011-11-23 | 株洲变流技术国家工程研究中心有限公司 | Method and board for photoelectric trigger detection based on parallel thyristors |
-
2010
- 2010-12-13 CN CN 201020656926 patent/CN201947159U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253331A (en) * | 2011-04-19 | 2011-11-23 | 株洲变流技术国家工程研究中心有限公司 | Method and board for photoelectric trigger detection based on parallel thyristors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 2401K Building, 24th Floor, Coastal Ring Qing Building, No. 24 Futian Street, Futian Street, Futian Town, Shenzhen City, Guangdong Province Co-patentee after: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Patentee after: Shenzhen Rongke Hengyang Rectifier Technology Co.,Ltd. Address before: 100084 No. 1, Nongda South Road, No. 8, bright city, Silicon Valley, Beijing, Haidian District Co-patentee before: RONGXIN POWER ELECTRONIC Co.,Ltd. Patentee before: BEIJING RONGKE HENGYANG RECTIFICATION TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200311 Address after: 518000 2401K Building, 24th Floor, Coastal Ring Qing Building, No. 24 Futian Street, Futian Street, Futian Town, Shenzhen City, Guangdong Province Co-patentee after: LIAONING RONGXIN INDUSTRIAL ELECTRIC POWER TECHNOLOGY CO.,LTD. Patentee after: Shenzhen Rongke Hengyang Rectifier Technology Co.,Ltd. Address before: 518000 2401K Building, 24th Floor, Coastal Ring Qing Building, No. 24 Futian Street, Futian Street, Futian Town, Shenzhen City, Guangdong Province Co-patentee before: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Patentee before: Shenzhen Rongke Hengyang Rectifier Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |
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| CX01 | Expiry of patent term |