CN105592615A - High-power microwave vacuum tube filament power source system and working method thereof - Google Patents
High-power microwave vacuum tube filament power source system and working method thereof Download PDFInfo
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- CN105592615A CN105592615A CN201410561915.XA CN201410561915A CN105592615A CN 105592615 A CN105592615 A CN 105592615A CN 201410561915 A CN201410561915 A CN 201410561915A CN 105592615 A CN105592615 A CN 105592615A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The present invention discloses a high-power microwave vacuum tube filament power source system. The high-power microwave vacuum tube filament power source system includes an input isolation transformer, a rectifying and filtering unit, a power inversion unit, a filtering unit and an isolation step-down transformer which are in series connection communication with one another; and a micro controller acquires current and voltage signals on a circuit between the filtering unit and the isolation step-down transformer through a current and voltage measurement unit, and controls the power inversion unit to adjust output voltage according to the current and voltage signals. According to the high-power microwave vacuum tube filament power source system of the invention, the power inversion unit and the filtering unit are adopted, so that a frequency conversion mode can be adopted to adjust voltage, and therefore, complete sine waves will not be formed at a low voltage end, and the effective value of the output voltage can be measured easily at the low voltage end, and a high voltage-end circuit is not required to be adopted. The high-power microwave vacuum tube filament power source system has the advantages of simple structure, small size, no mechanical voltage adjusting devices, easiness in control and adjustment. With the voltage adjustment mode realized, a filament power source feedback control loop can use the effective value of alternating current at the low voltage end as feedback quantity, and high stability can be achieved.
Description
Technical field
The present invention relates to plasma heating field, relate in particular to a kind of high-power microwave vacuum pipe filament supplySystem, the invention still further relates to the method for work of this high-power microwave vacuum spot silk power-supply system.
Background technology
High power RF ripple is a kind of important current drives and heating hand in the research of magnetic confinement fusion plasmaSection, adopts high-power microwave vacuum pipe to produce needed High-Power Microwave conventionally in rf wave heating system,In order to make the negative electrode of high-power microwave vacuum pipe there is the ability of electron emission, need to adopt filament target to enterRow heating, filament supply is the electric power system of filament, it needs to supply according to the needs adjustment of heating systemGive the voltage of filament, especially for working in unsaturation emission state, beam electronic current is very responsive to filament wattageMicrowave vacuum pipe, can adjust easily and accurately filament voltage and just seem even more important.
In rf wave heating field, successively develop the filament supply of the different pressure regulation methods of multiple employing:
Early stage filament supply uses AC voltage regulator as voltage adjuster part, the alternating current after adjustment by everyAfter transformer, directly power to filament. This method of supplying power to, owing to there is no light current device, reliability is high,Need manually repeatedly to adjust but exist, equipment moves complicated problem, and this method is applicable to High-Power MicrowaveThe debugging of vacuum tube factory. Simultaneously because AC voltage regulator exists mechanical wear, thereby need periodic replacement, and be subject toThe restriction of AC voltage regulator coil turn, is restricted the minimal adjustment voltage of power supply in this way;
Afterwards this method was improved, and introduced stepper motor and adjust AC voltage regulator, can realize far awayProcess control and FEEDBACK CONTROL, but the problem, the minimal adjustment electricity of power supply of the mechanical wear that AC voltage regulator existsPress limited problem still to exist;
Along with the development of power electronic devices, filament supply adopts two-way adjustable silicon to carry out chopper control. ThisMethod has overcome AC voltage regulator and has existed the problem of mechanical wear, and degree of regulation improves simultaneously, easily controls.But, because chopper control output voltage waveforms is not complete sine wave, after isolating transformer, heightOn power microwave vacuum spot silk, there is surge voltage, affect burn-out life. The virtual value of chopping voltage simultaneouslyMeasurement device complexity, FEEDBACK CONTROL precision is not high. In order to solve chopping voltage discontinuous problem on filament,At high-pressure side, (be the secondary of isolating transformer, it is connected with filament, because negative electrode works in high-voltage stateAnd filament, close to negative electrode, cannot be realized the High-Voltage Insulation of filament and negative electrode, conventionally one end of filament directly andNegative electrode links together, and filament voltage is superimposed upon in cathode high voltage, thereby the secondary of isolating transformer is heightPressure side) introduce rectification circuit, AC chopping voltage commutation is become to direct current, then output on filament. AndDC voltage and current measurement device are installed on high-pressure side, and solution chopping voltage virtual value is difficult for measuringProblem, has improved FEEDBACK CONTROL precision. Present most of ripple heating system filament supply is adopted in this way.The major defect of this method is that filament supply exists high-pressure side circuit, filament supply complexity. And at high-pressure sideIn circuit, there is weak electricity measuring device, in the time of high-power microwave vacuum pipe abnormal protection, easily damage power supplyReliability is not high.
Summary of the invention
The technical problem that the present invention solves is that the complex structure volume of filament supply in prior art is large and regulateThe problem that precision and stability can not be taken into account, and then provide that a kind of volume simple in structure is little, degree of regulation is high,The filament supply system of good stability.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is as follows:
High-power microwave vacuum spot silk power-supply system, comprising:
Input isolating transformer, for isolating described high-power microwave vacuum spot silk power-supply system and electrical networkDirect current connects;
Rectification filtering unit, for being converted to direct current by Alternating Current Power Supply;
Power inverting unit, will be converted into required through the direct current of described rectification filtering unit output for realizingThe alternating current of voltage, and then realize system pressure regulating;
Filter unit, for the high-frequency harmonic of the alternating current that described in filtering, power inverting unit obtains;
Insulate step-down transformer, for isolating described high-power microwave vacuum spot silk power-supply system and high powerThe negative electrode of microwave vacuum pipe, and reduce alternating voltage;
Microcontroller, for realizing FEEDBACK CONTROL;
Described input isolating transformer, described rectification filtering unit, described power inverting unit, described filteringThe connection of connecting successively of unit and described insulate step-down transformer, described microcontroller is by current-voltage measurement listCurrent and voltage signals on the former limit circuit of the described insulate step-down transformer of unit's collection, and according to this current/voltageDescribed in signal controlling, power inverting unit is adjusted output voltage.
Preferably, the minimal adjustment step-length of described power inverting unit is below 0.1V.
Preferably, also comprise telecommunication unit, described telecommunication unit can receive described microcontrollerThe signal transmitting, simultaneously also can be to described microcontroller sending controling instruction, to realize the far away of system pressure regulatingProcess control.
Preferably, the isolation of described insulate step-down transformer is 100KV.
Preferably, the output voltage adjusting range of described power inverting unit is 2V～150V.
Preferably, described power inverting unit drives is SPWM Technique.
The present invention also provides a kind of method of work of described high-power microwave vacuum spot silk power-supply system, itsBe characterised in that, comprise the following steps:
During high-power microwave vacuum tube discharge gap, control described high-power microwave vacuum pipe filament supplySystem drops to filament wattage below the half of rated power;
Before high-power microwave vacuum tube discharge, controlling described high-power microwave vacuum spot silk power-supply system willFilament wattage rises to rated power.
Preferably, during high-power microwave vacuum tube discharge gap, control described high-power microwave vacuum pipeFilament wattage is dropped to 20%～50% of rated power by filament supply system.
Preferably, control described high-power microwave vacuum spot silk power-supply system the power rise time and/or underThe time of falling is more than 15min.
Beneficial effect of the present invention is as follows:
High-power microwave vacuum spot silk power-supply system of the present invention, by power inverting unit and filter unitArrange and adopt conversion system pressure regulation, thereby formed at low-pressure end (the former limit of insulate step-down transformer)Whole sine wave, and then be easy to measure output voltage virtual value at low-pressure end, do not need to arrange high-pressure side electricityRoad, simple in structure, volume is little, and machinery-free pressure regulation device, easily controls and regulates, and this voltage regulating modeMake filament supply feedback control loop can use low-pressure end alternating voltage virtual value as feedback quantity, stableProperty is high.
Brief description of the drawings
Fig. 1 is high-power microwave vacuum spot silk power-supply system theory diagram of the present invention;
Fig. 2 is high-power microwave vacuum spot silk power-supply system output voltage waveform of the present invention;
Fig. 3 is the insulate step-down transformer no-load voltage ratio performance plot in the present invention;
Fig. 4 is high-power microwave vacuum spot silk power-supply system output timing diagram of the present invention;
Fig. 5 is the system of a specific embodiment of high-power microwave vacuum spot silk power-supply system of the present inventionSchematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention and beneficial effect are further saidBright.
In the present invention, so-called " more than ", the description of all expression number ranges such as " below " includes thisNumber.
Referring to accompanying drawing 1, high-power microwave vacuum spot silk power-supply system of the present invention, comprising:
Input isolating transformer, for isolating the direct current of high-power microwave vacuum spot silk power-supply system and electrical networkConnect, prevent in plasma discharge process the impact of dash current on filament supply;
Rectification filtering unit, for being converted to direct current by Alternating Current Power Supply;
Power inverting unit, will be converted into required voltage through the direct current of rectification filtering unit output for realizingAlternating current, and then realize system pressure regulating;
Filter unit, the high-frequency harmonic of the alternating current obtaining for filtering power inverting unit, itself and powerInversion unit is realized the frequency conversion voltage adjusting of system together;
Insulate step-down transformer, for isolating high-power microwave vacuum spot silk power-supply system and High-Power MicrowaveThe negative electrode of vacuum tube, and reduce alternating voltage;
Microcontroller, for realizing FEEDBACK CONTROL;
Input isolating transformer, rectification filtering unit, power inverting unit, filter unit and isolated buck becomeThe depressor connection of connecting successively, microcontroller gathers the former of insulate step-down transformer by current-voltage measurement unitCurrent and voltage signals on the circuit of limit, and according to this current and voltage signals power ratio control inversion unit to exporting electricityCompress into row adjustment.
High-power microwave vacuum spot silk power-supply system of the present invention is used the frequency conversion voltage adjusting skill based on sinusoidal waveArt, output waveform is complete sine wave, easily measures effective value of alternating current, machinery-free pressure regulation device and multipleThe assorted rectification of filament high-pressure side and measuring element, directly use isolating transformer low-pressure end voltage to feed back controlSystem, power supply architecture is relatively simple, is easy to adjusting and reliability high.
High-power microwave vacuum spot silk power-supply system of the present invention is by controlling the former limit of insulate step-down transformer(low-pressure end) voltage, can reach control secondary voltage is the object of filament voltage, this is contrary with regard to required powerThe harmonic distortion rate that change unit obtains is little, and the no-load voltage ratio of insulate step-down transformer is stable, and the present invention is in order to meetImprovement and performance evaluation that above-mentioned needs carry out are as follows:
Fig. 2 is former limit and the secondary voltage waveform of insulate step-down transformer, and wherein, channel oscilloscope 1 is for becomingDepressor original edge voltage waveform, passage 2 is secondary voltage waveform, and the input and output of insulate step-down transformerBeing same frequency, is all 50.05Hz. Power inverting unit in the present invention output wave mode as can be seen from FigureFor sine wave, substantially do not produce distortion, power inverting of the present invention unit is by AC/DC rectification, by threeAngle ripple and sinusoidal wave synthetic SPWM drive, and produce high-quality sine wave by DC/AC inverter, canSo that harmonic distortion is less than 1.5%;
Filament supply electric power system of the present invention, without high-pressure side circuit, is directly used the conduct of low-pressure end alternating voltageEffective Feedback amount, calculates secondary (high-pressure side) electricity by the transformation-ratio meter of original edge voltage and insulate step-down transformerPress virtual value. For the correctness that ensures to calculate, need the ratio error of insulate step-down transformer very little, thisThe insulate step-down transformer of invention adopts the above isolating transformer of 100kV, for realizing isolation High-Power MicrowaveTube cathode high pressure and reduction alternating voltage, thus ensure that the no-load voltage ratio of insulate step-down transformer is stable, at filament volumeDetermine near voltage, ratio error is less than 1%, and its no-load voltage ratio characteristic is referring to Fig. 3;
The performance of this measuring method that filament supply electric power system of the present invention adopts is better than traditional filament voltageThe voltage-frequency conversion measuring method of high-pressure side. Because the no-load voltage ratio of insulate step-down transformer is stable, filament supplyFeedback controller is stablized after original edge voltage, and secondary voltage is also stablized, and then by the feedback electricity of low-pressure endThe stable of filament voltage can be realized in road.
In order to realize the Long-distance Control of system pressure regulating, high-power microwave vacuum spot silk power-supply system of the present inventionAlso comprising can telecommunication unit, and described telecommunication unit can receive the letter that described microcontroller transmitsNumber, simultaneously also can be to described microcontroller sending controling instruction.
The minimal adjustment step-length that power inverting unit is set is less than 0.1V, for negative electrode work in unsaturated state,Regulate the high power micro-vacuum wave duct of beam electronic current to have great importance by filament wattage, this set makesFilament supply can meticulous adjusting filament wattage, and then optimizes the operating point of high power klystron.
The output voltage adjusting range that power inverting unit is set be 2V to 150V, make high power of the present inventionThe voltage of exporting to filament of microwave vacuum spot silk power-supply system, adjustable in a big way, thus canThe power supply mode of filament supply is set flexibly.
The course of work of high-power microwave vacuum spot silk power-supply system of the present invention is as follows:
Use 220V alternating current for the power supply of high-power microwave vacuum spot silk power-supply system, 220V alternating current warpAfter rectifying and wave-filtering, obtain the DC voltage of about 300V, power inverting unit is transformed into interchange 300V direct currentElectricity, fundamental frequency can be adjusted as required, and adjusting range is that 40Hz is to 400Hz. Due to high power micro-vacuumWave duct filament is to frequency of supply no requirement (NR), and it is 50Hz that output frequency is set in the use procedure of high power klystron.Power inverting unit output voltage adjusting range is set is 2V to 150V, peak power output is 1kW,Minor adjustment step-length is less than 0.1V, and for example can make to regulate step-length is 0.05V. Inversion unit drives selects sinePulse modulation technology (SPWM), at this moment output voltage waveforms is sine wave and high-frequency harmonic, through output filtering listAfter unit, filtering high-frequency harmonic, only has fundamental frequency sine wave. Output insulate step-down transformer is micro-at partition high powerWhen vacuum wave duct cathode high voltage, reduce output voltage, be operated in the large electricity of low-voltage to meet microwave tube filamentStream mode. This insulate step-down transformer design capacity can be 1kVA, and operating frequency can be 50Hz, forPlay better buffer action, isolation can be set more than 100kV, for example concrete 100kV that is made as,No-load voltage ratio can be determined according to concrete high power micro-vacuum wave duct filament parameter.
High-power microwave vacuum spot silk is installed in microwave tube vacuum, is difficult for changing, and burn-out life is directly determinedDetermine the service time of high-power microwave vacuum pipe. Because of high-power microwave vacuum spot silk power-supply system of the present inventionRegulate easily, so can adopt power supply mode more flexibly, to extend burn-out life, and then can extend speedAdjust and manage service time. The invention provides one based on high-power microwave vacuum pipe filament supply of the present invention isThe method of work that can extend burn-out life of system:
Specifically as shown in Figure 4, be the electricity of the method for work that adopts in order to extend filament service time of the present inventionSource working timing figure,, during high-power microwave vacuum tube discharge gap, controls high-power microwave vacuum pipeFilament supply system drops to filament wattage below the half of rated power through certain hour, for example can be belowBe down to 20%～50% of rated power, power supply maintains 20%～50% rated power output, at high powerControl before microwave vacuum tube discharge described high-power microwave vacuum pipe power-supply system through heater current through certain hourRise to rated value, this certain hour that is used for declining or rising can be generally 2min, due to velocity modulation spotSilk cold-state resistance is little, and hot resistance is large, in order to reduce filament power-on impact current, can control high power micro-The power rise time of ripple vacuum tube filament supply system and/or fall time are more than 15min.
Those skilled in the art can select high-power microwave vacuum spot silk of the present invention according to common practiseThe physical circuit of each functional unit in power-supply system, as long as can realize the function of each functional unit. Fig. 5Provided a concrete system principle diagram, wherein system is by AC/DC rectification, by triangular wave and sineThe synthetic SPWM of ripple drives, and produces high-quality sine wave by DC/AC inversion, and defeated at filter unitGo out between the circuit of insulate step-down transformer various measuring circuits are set, comprise voltage measurement, current measurementEtc..
Claims (9)
1. high-power microwave vacuum spot silk power-supply system, is characterized in that, comprising:
Input isolating transformer, for isolating described high-power microwave vacuum spot silk power-supply system and electrical networkDirect current connects;
Rectification filtering unit, for being converted to direct current by Alternating Current Power Supply;
Power inverting unit, will be converted into required through the direct current of described rectification filtering unit output for realizingThe alternating current of voltage, and then realize system pressure regulating;
Filter unit, for the high-frequency harmonic of the alternating current that described in filtering, power inverting unit obtains;
Insulate step-down transformer, for isolating described high-power microwave vacuum spot silk power-supply system and high powerThe negative electrode of microwave vacuum pipe, and reduce alternating voltage;
Microcontroller, for realizing FEEDBACK CONTROL;
Described input isolating transformer, described rectification filtering unit, described power inverting unit, described filteringThe connection of connecting successively of unit and described insulate step-down transformer, described microcontroller is by current-voltage measurement listCurrent and voltage signals on the former limit circuit of the described insulate step-down transformer of unit's collection, and according to this current/voltageDescribed in signal controlling, power inverting unit is adjusted output voltage.
2. high-power microwave vacuum spot silk power-supply system as claimed in claim 1, is characterized in that: described inThe minimal adjustment step-length of power inverting unit is below 0.1V.
3. high-power microwave vacuum spot silk power-supply system as claimed in claim 1, is characterized in that: also bagDraw together telecommunication unit, described telecommunication unit can receive the signal that described microcontroller transmits, simultaneouslyAlso can be to described microcontroller sending controling instruction, to realize the Long-distance Control of system pressure regulating.
4. high-power microwave vacuum spot silk power-supply system as claimed in claim 1, is characterized in that: described inThe isolation of insulate step-down transformer is more than 100KV.
5. high-power microwave vacuum spot silk power-supply system as claimed in claim 1, is characterized in that: described inThe output voltage adjusting range of power inverting unit is 2V～150V.
6. high-power microwave vacuum spot silk power-supply system as described in any one in claim 1 to 5, its spyLevy and be: the driving of described power inverting unit is SPWM Technique.
7. the work of high-power microwave vacuum spot silk power-supply system described in any one in a claim 1 to 6Make method, it is characterized in that, comprise the following steps:
During high-power microwave vacuum tube discharge gap, control described high-power microwave vacuum pipe filament supplySystem drops to filament wattage below the half of rated power;
Before high-power microwave vacuum tube discharge, controlling described high-power microwave vacuum spot silk power-supply system willFilament wattage rises to rated power.
8. method of work as claimed in claim 7, is characterized in that: between high-power microwave vacuum tube dischargeDuring gap, control described high-power microwave vacuum spot silk power-supply system filament wattage is dropped to rated power20%～50%.
9. method of work as described in claim 7 or 8, is characterized in that: control described High-Power Microwave trueThe power rise time of blank pipe filament supply system and/or fall time are more than 15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410561915.XA CN105592615A (en) | 2014-10-21 | 2014-10-21 | High-power microwave vacuum tube filament power source system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410561915.XA CN105592615A (en) | 2014-10-21 | 2014-10-21 | High-power microwave vacuum tube filament power source system and working method thereof |
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| CN105592615A true CN105592615A (en) | 2016-05-18 |
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| CN201410561915.XA Pending CN105592615A (en) | 2014-10-21 | 2014-10-21 | High-power microwave vacuum tube filament power source system and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108702154A (en) * | 2017-10-13 | 2018-10-23 | 深圳市汇顶科技股份有限公司 | Feedback control current shaping for reducing magnetic-coupled digital signal exports |
| CN114268228A (en) * | 2021-12-15 | 2022-04-01 | 中国电子科技集团公司第三十八研究所 | Power frequency synchronous filament power supply |
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| CN102545621A (en) * | 2011-11-21 | 2012-07-04 | 华为技术有限公司 | Switching power supply and control method thereof |
| CN103414345A (en) * | 2013-08-27 | 2013-11-27 | 东北大学 | Negative-high-voltage direct-current integrated power supply for X-ray tube and control method thereof |
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| CN2779793Y (en) * | 2005-03-31 | 2006-05-10 | 北京中科信电子装备有限公司 | Ion-source filament supply |
| CN102157968A (en) * | 2011-04-15 | 2011-08-17 | 株洲南车时代电气股份有限公司 | High-power charger for maglev train |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108702154A (en) * | 2017-10-13 | 2018-10-23 | 深圳市汇顶科技股份有限公司 | Feedback control current shaping for reducing magnetic-coupled digital signal exports |
| CN108702154B (en) * | 2017-10-13 | 2022-03-29 | 深圳市汇顶科技股份有限公司 | Feedback controlled current shaping output for magnetic coupled digital signals |
| CN114268228A (en) * | 2021-12-15 | 2022-04-01 | 中国电子科技集团公司第三十八研究所 | Power frequency synchronous filament power supply |
| CN114268228B (en) * | 2021-12-15 | 2023-04-28 | 中国电子科技集团公司第三十八研究所 | Power frequency synchronous filament power supply |
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Application publication date: 20160518 |