CN104320878A - Power supply device for hollow cathode detection system - Google Patents
Power supply device for hollow cathode detection system Download PDFInfo
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- CN104320878A CN104320878A CN201410571467.1A CN201410571467A CN104320878A CN 104320878 A CN104320878 A CN 104320878A CN 201410571467 A CN201410571467 A CN 201410571467A CN 104320878 A CN104320878 A CN 104320878A
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Abstract
The invention provides a power supply device for a hollow cathode detection system. In the hollow cathode detection system, an alternating current output by a 220V alternating current power source (1) is output to a voltage booster (4) until voltage of the alternating current rises to 600V-700V AC after the alternating current passes through a filter (2) and a voltage stabilizer (3), and then the voltage of the alternating current is converted into direct current voltage through a bridge rectifier I (5), the direct current voltage is divided into two channels, one channel of the direct current voltage is directly input to a hollow cathode lamp (6), the other channel of the direct current voltage generates a pulse current through a silicon controlled rectifier (7), the pulse current is output to the hollow cathode lamp (6), and additionally, a work current of the hollow cathode lamp (6) is extracted, and output to control signal input ends of the silicon controlled rectifier (7) through a bridge rectifier II (8), which are respectively a foot 4 and a foot 6. Compared with the prior art, the power supply device for the hollow cathode detection system uses a direct current and pulse combination power supply system, and the pulse current is generated by wave absorbing of the single silicon controlled rectifier connected in a combination circuit in parallel. The power supply device for the hollow cathode detection system has the advantages of being large in power supply energy, high in stimulation intensity, and low in detection limit of detected elements, and the detection limit of the detected elements is below the ppm (parts per million) level.
Description
Technical field
The present invention is a kind of supply unit for Hollow Atoms, belongs to electronic technology field.
Background technology
Hollow Atoms is a kind of special shape of spectrum analysis light source.Utilize low pressure discharge principle, energy is concentrated on to greatest extent the inside cavity of hollow cathode, therefore there is the feature that excitation intensity is large, highly sensitive.
Nearly half a century, hollow cathode discharge has been widely used in emission spectrographic analysis, particularly ultrapure physical analysis.From theory analysis and facts have proved, the trace element that hollow cathode discharge spectroscopic analysis analyzes low melting point trace element and some medium fusing point than other spectroscopic light source has lower detection limit.
The power supply of Hollow Atoms generally adopts direct current, pulse and direct current to add pulse three kinds of modes.DC power supply is generally designed to DC current regulator power supply, more than 800 volts, when its tangible working gas is argon gas, the electricity combustion voltage of hollow cathode discharge can be there is at about 600 volts in VD, too high output voltage makes reactive loss power increase, and unfavorable in handling safety.The electric discharge of the pulse power has the advantages that instantaneous power is high, energy is large, so excite sensitivity high, can obtain desirable element spectral line blackness, but there will be the problem of the reproducibility difference that discharge instability causes with less discharging current.The supply power mode that direct current adds pulse has electric discharge continous-stable concurrently and excites high-octane feature instantaneously, and this kind of power supply structure is simple, but the adjusting function of electric current is poor, can not meet the requirement of power supply rapid-action.
Summary of the invention
The present invention designs for above-mentioned problems of the prior art just and provides a kind of supply unit for hollow cathode detection system, its objective is that the hollow cathode lamp worked under adding pulsed amperometric mode to the direct current of high voltage, big current carries out the adjustment of dynamic pulse electric current output.
The object of the invention is to be achieved through the following technical solutions:
This kind is for the supply unit of hollow cathode detection system, it is characterized in that: in this device, 220V AC power (1) is device (2) after filtering, output to stepup transformer (4) after pressurizer (3) and boost to 600V ~ 700V AC, then direct voltage is changed into through bridge rectifier I (5), this direct voltage is divided into two-way, one tunnel directly outputs to hollow cathode lamp (6), another road produces pulse current through controllable silicon (7) and outputs to hollow cathode lamp (6), in addition, the operating current extracting hollow cathode lamp (6) outputs to the control signal input of controllable silicon (7) through bridge rectifier II (8), 4 pin and 6 pin,
The power of 220V AC power (1), pressurizer (2) and stepup transformer (4) is 2KW ~ 4KW, the operating current of bridge rectifier I (5) and controllable silicon (7) is 5A ~ 25A, bridge rectifier I (5) and the withstand voltage of controllable silicon (7) are 1200V ~ 1500V, the operating current of bridge rectifier II (8) is 1A ~ 5A, and withstand voltage is 400V ~ 1200V.
Technical solution of the present invention adopts SCR control to export pulse current, for hollow cathode lamp is powered together with customary DC electric current, in the course of the work, need the feedback according to the real-time working curent change of hollow cathode lamp, exported by controllable silicon dynamic conditioning pulse current, achieve paired pulses electric current quick adjustment.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of apparatus of the present invention
Embodiment
Below with reference to drawings and Examples, technical solution of the present invention is further described:
Shown in accompanying drawing 1, this kind is for the supply unit of hollow cathode detection system, it is characterized in that: in this device, 220V AC power 1 is device 2 after filtering, output to stepup transformer 4 after pressurizer 3 and boost to 600V ~ 700V AC, then direct voltage is changed into through bridge rectifier I 5, this direct voltage is divided into two-way, one tunnel directly outputs to hollow cathode lamp 6, another road produces pulse current through controllable silicon 7 and outputs to hollow cathode lamp 6, in addition, the operating current extracting hollow cathode lamp 6 outputs to the control signal input of controllable silicon 7 through bridge rectifier II 8, 4 pin and 6 pin,
The power of 220V AC power 1, pressurizer 2 and stepup transformer 4 is 2KW ~ 4KW, the operating current of bridge rectifier I 5 and controllable silicon 7 is 5A ~ 25A, bridge rectifier I 5 and the withstand voltage of controllable silicon 7 are 1200V ~ 1500V, the operating current of bridge rectifier II 8 is 1A ~ 5A, and withstand voltage is 400V ~ 1200V.
Move power supply air switch, connect external power, this device is added to A.C. contactor SW2 input after first the 220V AC supply voltage of input being carried out voltage stabilizing, filtering.Press exposure button, A.C. contactor is connected, supply voltage is added to stepup transformer primary input, boost to 600V, for hollow cathode lamp electric discharge provides the energy needed for keep-alive voltage and sustain discharge, electric current after boosting carries out full-wave rectification by bridge rectifier I, become the direct voltage needed for hollow cathode lamp electric discharge, be added to the anode of hollow cathode lamp after this direct voltage is divided into two again simultaneously, the negative terminal of bridge rectifier I directly receives the negative electrode of hollow cathode lamp, negative electrode tungsten bar is inserted with the hollow cathode that graphite is made, can there is hollow cathode discharge in (Ar atmosphere) in the low pressure state.The resistance of resistance R5, resistance R5 of leading up in described direct voltage is 1200 ohm, and power is 300W, produces the direct current of 200mA, separately leads up to the current-limiting resistance R6 of 200 ohm.
The operating current signal of hollow cathode lamp 6 is gathered by the sampling resistor R7 of 5 ohm, the control signal input of controllable silicon 7 is outputted to through bridge rectifier II 8,4 pin and 6 pin, Voltage Cortrol is carried out by controllable silicon 7, change the voltage signal of the control signal input of controllable silicon 7, can be the pulse current that hollow cathode lamp provides 0 ~ 1000mA.
Compared with prior art, apparatus of the present invention use direct current to add pulse combined electric power system, and pulse current is produced by the single silicon controlled wave absorption be connected in parallel in combinational circuit.Its advantage is large for electric flux, and the detection limit of high, the detected element of excitation intensity is low, below ppm level.This device is specially adapted to metal and the analysis of Trace Elements In Alloys direct solid sample introduction, easy and simple to handle, and analysis speed is fast, and expense is low.
Claims (5)
1. the supply unit for hollow cathode detection system, it is characterized in that: in this device, 220V AC power (1) is device (2) after filtering, output to stepup transformer (4) after pressurizer (3) and boost to 600V ~ 700V AC, then direct voltage is changed into through bridge rectifier I (5), this direct voltage is divided into two-way, one tunnel directly outputs to hollow cathode lamp (6), another road produces pulse current through controllable silicon (7) and outputs to hollow cathode lamp (6), in addition, the operating current extracting hollow cathode lamp (6) outputs to the control signal input of controllable silicon (7) through bridge rectifier II (8), 4 pin and 6 pin,
The power of 220V AC power (1), pressurizer (2) and stepup transformer (4) is 2KW ~ 4KW, the operating current of bridge rectifier I (5) and controllable silicon (7) is 5A ~ 25A, bridge rectifier I (5) and the withstand voltage of controllable silicon (7) are 1200V ~ 1500V, the operating current of bridge rectifier II (8) is 1A ~ 5A, and withstand voltage is 400V ~ 1200V.
2. supply unit according to claim 1, is characterized in that: the negative terminal of bridge rectifier I (5) directly receives the negative electrode of hollow cathode lamp.
3. supply unit according to claim 1, is characterized in that: the direct voltage changed through bridge rectifier I (5) leads up to resistance (R5), separately leads up to the current-limiting resistance (R6) of 200 ohm.
4. supply unit according to claim 1, is characterized in that: the operating current signal of hollow cathode lamp (6) is gathered by sampling resistor (R7).
5. supply unit according to claim 1, it is characterized in that: carry out Voltage Cortrol by controllable silicon (7), change the voltage signal of the control signal input of controllable silicon (7), for hollow cathode lamp provides the pulse current of 0 ~ 1000mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410571467.1A CN104320878B (en) | 2013-11-08 | 2014-10-23 | A kind of supply unit for hollow cathode detection system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310553386.4A CN103747557A (en) | 2013-11-08 | 2013-11-08 | Power supply device used for hollow cathode detection system |
| CN201310553386.4 | 2013-11-11 | ||
| CN2013105533864 | 2013-11-11 | ||
| CN201410571467.1A CN104320878B (en) | 2013-11-08 | 2014-10-23 | A kind of supply unit for hollow cathode detection system |
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| Publication Number | Publication Date |
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| CN104320878A true CN104320878A (en) | 2015-01-28 |
| CN104320878B CN104320878B (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310553386.4A Pending CN103747557A (en) | 2013-11-08 | 2013-11-08 | Power supply device used for hollow cathode detection system |
| CN201410571467.1A Active CN104320878B (en) | 2013-11-08 | 2014-10-23 | A kind of supply unit for hollow cathode detection system |
| CN201420618907.XU Active CN204217172U (en) | 2013-11-08 | 2014-10-23 | A kind of supply unit for hollow cathode detection system |
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| CN201310553386.4A Pending CN103747557A (en) | 2013-11-08 | 2013-11-08 | Power supply device used for hollow cathode detection system |
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| CN201420618907.XU Active CN204217172U (en) | 2013-11-08 | 2014-10-23 | A kind of supply unit for hollow cathode detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036976A (en) * | 2016-12-01 | 2017-08-11 | 昆山书豪仪器科技有限公司 | A kind of Hollow Atoms |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103747557A (en) * | 2013-11-08 | 2014-04-23 | 中国航空工业集团公司北京航空材料研究院 | Power supply device used for hollow cathode detection system |
| CN105629108B (en) * | 2015-12-30 | 2018-03-30 | 哈尔滨工业大学 | Simulate the hollow cathode independent experiment circuit of hollow cathode and thruster coupling operational |
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| CN87201104U (en) * | 1987-03-04 | 1988-04-27 | 中国科学院上海光学精密机械研究所 | Repetition frequency pulse power supply |
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2013
- 2013-11-08 CN CN201310553386.4A patent/CN103747557A/en active Pending
-
2014
- 2014-10-23 CN CN201410571467.1A patent/CN104320878B/en active Active
- 2014-10-23 CN CN201420618907.XU patent/CN204217172U/en active Active
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| CN87201104U (en) * | 1987-03-04 | 1988-04-27 | 中国科学院上海光学精密机械研究所 | Repetition frequency pulse power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107036976A (en) * | 2016-12-01 | 2017-08-11 | 昆山书豪仪器科技有限公司 | A kind of Hollow Atoms |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204217172U (en) | 2015-03-18 |
| CN104320878B (en) | 2018-10-02 |
| CN103747557A (en) | 2014-04-23 |
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