CN103022983A - Array type klystron thermal effect over-current protection method - Google Patents
Array type klystron thermal effect over-current protection method Download PDFInfo
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- CN103022983A CN103022983A CN2012103698285A CN201210369828A CN103022983A CN 103022983 A CN103022983 A CN 103022983A CN 2012103698285 A CN2012103698285 A CN 2012103698285A CN 201210369828 A CN201210369828 A CN 201210369828A CN 103022983 A CN103022983 A CN 103022983A
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Abstract
The invention discloses an array type klystron thermal effect over-current protection method. According to the array type klystron thermal effect over-current protection method provided by the invention, a klystron array with a plurality of klystrons is arranged, and shunts are selected; a limiting resistor is connected in series between a cathode of each klystron and a cathode of a high-voltage power source; a collection pole of each klystron is connected with the corresponding shunt; the other end of each shunt is connected with an anode of the high-voltage power source; a filter circuit is manufactured; an isolated amplification module is selected; a protection circuit is manufactured; two wiring terminals are led out from the both ends of each shunt; the both ends of each shunt are respectively connected with the filter circuit and an electric-photo conversion module; an output signal of the filter circuit is connected with the isolated amplification module, so that a small voltage signal is converted into a current signal and then is accessed to the protection circuit; the protection circuit judges whether current exceeds a safe threshold value or not; and a logic processing unit drives the electric-photo conversion module according to a judging result and emits an optical signal to control an output state of the high-voltage power source. The array type klystron thermal effect over-current protection method provided by the invention is applied to a spring discharge test in 2012 of an EAST nuclear fusion device, and can sufficiently protect the klystrons when the klystrons are over-current for times.
Description
Technical field:
The present invention relates to the klystron Over Current Protection System, relate in particular to a kind of array klystron thermal effect over-current protection method.
Background technology:
In the MW class continuous wave microwave system that forms take many klystrons as core, klystron is the device of expensive most fragile, is the most important thing of whole system protection to their protection.In general, adopt the instrument transformer method to detect klystron body and main circuit current more, protect klystron in conjunction with fast protection circuit.But this method can not change detected current signal slowly, if Body-current slowly increases the safe range that surpasses klystron, klystron may damage, and cause heavy losses.
Summary of the invention
The system that the purpose of this invention is to provide the slow klystron electric current that changes of a kind of suitable detection and klystron protection, the safety problem that faces to solve klystron.
For achieving the above object, the technical solution used in the present invention is:
A kind of array klystron thermal effect over-current protection method includes the klystron array with many klystrons, it is characterized in that, may further comprise the steps:
(1) respectively according to klystron Body-current, cathode current and collector electric current characteristics, selects shunt;
(2) be serially connected with a current-limiting resistance between the negative pole of the negative electrode of every klystron and high voltage source, the collector of every klystron connects corresponding shunt, the positive pole of the other end access high voltage source of each shunt;
Characteristic when (3) cutting off according to the klystron power supply high voltage, and the interference signal that exists on klystron when normal operation microwave system ground wire is made filter circuit;
(4) consider the electric current characteristics that detect and treatment circuit input requirements select Isolation Amplifier Module;
(5) protection requires the designing and making protective circuit according to klystron;
(6) protected location includes filter circuit, isolating amplifier circuit, protective circuit, Logical processing unit, the electrooptic conversion module of successively series connection, and protected location is connected in parallel on the two ends of shunt;
(7) two binding posts are drawn at the two ends of every shunt; access respectively filter circuit, electrooptic conversion module; the output signal access Isolation Amplifier Module of filter circuit; access protective circuit after the small voltage signal is converted to current signal; protective circuit judges whether electric current surpasses secure threshold; Logical processing unit drives electrooptic conversion module according to judged result, sends light signal control high voltage source output state.
Series limiting resistor is in order to limit main circuit current; Shunt is as the device that detects the collector electric current; Shunt of many klystron body series connection by same group of high voltage source power supply.
Advantage of the present invention is:
The present invention is applied in EAST nuclear fusion device discharge test spring in 2012, when repeatedly the klystron overcurrent occurs, has successfully protected klystron.
Description of drawings
Fig. 1 is many array klystron thermal effect overcurrent protection structural representations.
Fig. 2 is the structured flowchart of protected location.
Fig. 3 is the filter circuit schematic diagram.
Embodiment
Now protect slowly as example take 2.45GHz/4MW continuous wave microwave system klystron, non-limiting examples is described below:
As shown in Figure 1, 2, array klystron thermal effect over-current protection method includes the klystron array with 20 klystrons 2 in the 2.45GHz/4MW continuous wave microwave system, may further comprise the steps:
(1) respectively according to klystron 2 Body-currents, cathode current and collector electric current characteristics, selects shunt 1;
(2) be serially connected with one 20 ohm current-limiting resistance 3 between the negative pole of the negative electrode of every klystron 2 and high voltage source 6, the collector of every klystron 2 connects corresponding shunt 1, the positive pole of the other end access high voltage source 6 of each shunt 1;
Characteristic when (3) cutting off according to klystron 2 power supply high voltages, and the interference signal that exists on the microwave system ground wire during klystron 2 normal operation is made filter circuit 5;
(4) consider the electric current characteristics that detect and treatment circuit input requirements select Isolation Amplifier Module 7;
(5) 2 protections require designing and making protective circuit 8 according to klystron;
(6) protected location 4 includes filter circuit 5, isolating amplifier circuit 7, protective circuit 8, Logical processing unit 9, the electrooptic conversion module 10 of successively series connection, and protected location 4 is connected in parallel on the two ends of shunt 1;
(7) two binding posts are drawn at the two ends of every shunt 1; access respectively filter circuit 5, electrooptic conversion module 10; the output signal access Isolation Amplifier Module 7 of filter circuit 5; the small voltage signal is converted to access protective circuit 8 behind the current signal; protective circuit 8 judges whether electric current surpasses secure threshold; Logical processing unit 9 drives electrooptic conversion module 10 according to judged result, sends light signal control high voltage source output state and protects klystron 2.
Klystron is the 200kW klystron of being manufactured by Russian ISTOK research institute, whole system has 20 klystrons, per 5 klystrons are by 6 power supplies of one group of high voltage source, its desired Body-current, cathode current and collector electric current safety value are respectively 130mA, 15A and 15A, and the shunt of corresponding selection is respectively 500m Ω, 5m Ω and 5m Ω;
Filter circuit as shown in Figure 3, for fear of because the klystron power supply high voltage cuts off and the interference signal that exists on the microwave system ground wire during klystron normal operation causes detection and protected location misoperation;
Isolation Amplifier Module is according to klystron electric current and selected shunt, and amplifier is input as the millivolt level, and considers anti-interference and isolation features, the M2VF2-OA-M/N Isolation Amplifier Module of selecting M.SYSTEM company to produce, and this module is output as 0 ~ 100mA electric current.
Claims (1)
1. an array klystron thermal effect over-current protection method includes the klystron array with many klystrons, it is characterized in that, may further comprise the steps:
(1) respectively according to klystron Body-current, cathode current and collector electric current characteristics, selects shunt;
(2) be serially connected with a current-limiting resistance between the negative pole of the negative electrode of every klystron and high voltage source, the collector of every klystron connects corresponding shunt, the positive pole of the other end access high voltage source of each shunt;
Characteristic when (3) cutting off according to the klystron power supply high voltage, and the interference signal that exists on klystron when normal operation microwave system ground wire is made filter circuit;
(4) consider the electric current characteristics that detect and treatment circuit input requirements select Isolation Amplifier Module;
(5) protection requires the designing and making protective circuit according to klystron;
(6) protected location includes filter circuit, isolating amplifier circuit, protective circuit, Logical processing unit, the electrooptic conversion module of successively series connection, and protected location is connected in parallel on the two ends of shunt;
(7) two binding posts are drawn at the two ends of every shunt; access respectively filter circuit, electrooptic conversion module; the output signal access Isolation Amplifier Module of filter circuit; access protective circuit after the small voltage signal is converted to current signal; protective circuit judges whether electric current surpasses secure threshold; Logical processing unit drives electrooptic conversion module according to judged result, sends light signal control high voltage source output state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369828.5A CN103022983B (en) | 2012-09-28 | 2012-09-28 | A kind of array klystron thermal effect over-current protection method |
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| CN201210369828.5A CN103022983B (en) | 2012-09-28 | 2012-09-28 | A kind of array klystron thermal effect over-current protection method |
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| CN103022983A true CN103022983A (en) | 2013-04-03 |
| CN103022983B CN103022983B (en) | 2015-08-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760433A (en) * | 2013-12-24 | 2014-04-30 | 中国科学院等离子体物理研究所 | Simulation test method for high impact current |
| CN103795023A (en) * | 2014-01-20 | 2014-05-14 | 中国科学院等离子体物理研究所 | Tube body flow identification method of combined type klystron arrays |
| CN109085544A (en) * | 2018-10-29 | 2018-12-25 | 中国电子科技集团公司第十四研究所 | A kind of circuit improving transmitting signal stabilization |
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| CN201017254Y (en) * | 2007-04-05 | 2008-02-06 | 扬州双鸿电子有限公司 | Direct current constant voltage constant current source special for high voltage velocity modulated valve device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760433A (en) * | 2013-12-24 | 2014-04-30 | 中国科学院等离子体物理研究所 | Simulation test method for high impact current |
| CN103760433B (en) * | 2013-12-24 | 2016-08-24 | 中国科学院等离子体物理研究所 | A kind of heavy impulse current analog detection method |
| CN103795023A (en) * | 2014-01-20 | 2014-05-14 | 中国科学院等离子体物理研究所 | Tube body flow identification method of combined type klystron arrays |
| CN103795023B (en) * | 2014-01-20 | 2016-09-28 | 中国科学院等离子体物理研究所 | A kind of combination type klystron array body crosses stream recognition method |
| CN109085544A (en) * | 2018-10-29 | 2018-12-25 | 中国电子科技集团公司第十四研究所 | A kind of circuit improving transmitting signal stabilization |
| CN109085544B (en) * | 2018-10-29 | 2023-11-03 | 中国电子科技集团公司第十四研究所 | Circuit for improving stability of transmitting signal |
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| CN103022983B (en) | 2015-08-05 |
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Granted publication date: 20150805 Termination date: 20160928 |