CN2882106Y - High frequency high voltage pulse power supply - Google Patents
High frequency high voltage pulse power supply Download PDFInfo
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- CN2882106Y CN2882106Y CN 200620002364 CN200620002364U CN2882106Y CN 2882106 Y CN2882106 Y CN 2882106Y CN 200620002364 CN200620002364 CN 200620002364 CN 200620002364 U CN200620002364 U CN 200620002364U CN 2882106 Y CN2882106 Y CN 2882106Y
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Abstract
The utility model relates to a hi-frequency hi-voltage pulse power supply, which comprises an industry-frequency transformer having a primary-side winding and a plurality of secondary-side windings. Each secondary-side winding of the industry-frequency transformer is connected with a rectifying circuit, a filtering circuit and a hi-frequency-pulse-generating circuit, which are connected in series. The positive output ends and negative output ends of the hi-frequency-pulse-generating circuits are connected in sequence, and are connected with a computerized controller that is for controlling them to be on/off. Each hi-frequency-pulse-generating circuit comprises a pulse switch and a follow-current diode. The pulse switch is connected in series between the filtering circuit and the positive output end, and the follow-current diode is connected in parallel between the positive output end and negative output end. The pulse switch is connected with the computerized controller through a drive unit. The utility model presents a technical plan for generating hi-frequency hi-voltage pulse power supply by ''AC-DC-pulse overlapping to step up voltage'', is of adjustable frequency, easy to adjust voltage, can adjust pulse width, is with a wide current range, has no harmonic pollution and saves energy.
Description
Technical field
The utility model relates to a kind of pulse power, especially a kind of hf and hv pulse power supply that is used for crude oil electric dewatering or desalter.
Background technology
In recent years, the hf and hv pulse power supply is more and more general in the application of petrochemical industry, comprises carrying out electric demulsification, solvent extraction, water-oil separating etc.Find in the practical application that the hf and hv pulse power supply of Frequency Adjustable, amplitude modulation, accent pulsewidth is the key equipment during petrochemical industry is produced.
The dewatering and desalting of crude oil is an important step in Crude Oil Processing, the dewatering and desalting mode that is adopted in the dewatering and desalting link at present mainly is the electrical-chemical dehydration method, promptly add interchange or high direct voltage that voltage is 50Hz, according to different optional stream dewatering and desalting, direct current dewatering and desalting and the AC-to-DC mixed dehydration desalination process of choosing friends of supply power mode.But along with the oil field enters the high water-cut stage mining phase, most of oil district comprehensive moisture content is up to 90%, in order to improve recovery ratio, the general tertiary oil recovery technology that adopts carries out oil extraction, by displacing crude oil to underground injection oil displacement agent, these oil displacement agents make the composition of extraction liquid and oil-water emulsion state very complicated, and emulsion viscosity is big, particle is trickle, it is all very difficult that these extraction liquid are carried out breakdown of emulsion and sedimentation operation, and caused the insulating properties variation of oil product.Conventional crude oil electric dewatering/desalination power supply unit is when handling combination flooding crude oil, and the power supply of prior art generally can't be set up stable breakdown of emulsion electric field, and usually can short circuit phenomenon occur between the electric dehydrator pole plate.If three times extraction liquid profit treatment process can not get good solution, it will become, and the restriction tertiary oil recovery technology is promoted and the key issue of old filed stable yields volume increase.
For overcoming above-mentioned defective, prior art has proposed a kind of device that utilizes hf and hv pulse to dewater, three phase mains A, B, C form high-frequency impulse after rectification, filtering and inversion, boost by high frequency transformer again, after the hf rectifier rectification, form hf and hv pulse, last this hf and hv pulse is introduced on the high-frequency electrical dehydrator battery lead plate through high-voltage explosion-proof interface and High-Voltage Insulation rod again, forms the high-frequency impulse electric field and dewater in electric dehydrator.Consumption is big, the technical problem of the serious distortion of high-frequency impulse waveform but this device exists in actual use.This is because the step-up transformer in the circuit is not to be the transformer that ideal material is made, in the remagnetization process, magnetic hysteresis loss and eddy current loss can appear in the high frequency high voltage transformer core interior, and along with the magnetic field alternative frequency increases, magnetic hysteresis loss and eddy current loss can increase with exponential series.Reach the high-frequency impulse of about 10000Hz for frequency, this energy consumption makes the high-tension transformer can't operate as normal, and under the certain situation of inductance, too high frequency can make the serious distortion of output pulse waveform, thereby the impulse waveform that need can't obtain is to satisfy production requirement.
Prior art has also proposed a kind of hf and hv pulse power supply of being made up of circuit such as DC high-voltage power supply, voltage multiplying rectifier, signal source and voltage stabilizing triodes, but it is the cost height on the one hand, electric current is little on the other hand, electric current can only reach about 1mA～5mA, can not satisfy the requirement that the big electric dehydration of current requirements scope uses.
The utility model content
The purpose of this utility model is the technological deficiency at prior art, proposes a kind of hf and hv pulse power supply, when possessing Frequency Adjustable, amplitude modulation, accent pulsewidth, has that output current scope is wide, energy consumption is little and characteristics such as low cost.
For realizing the purpose of this utility model, the utility model provides a kind of hf and hv pulse power supply, comprise that one has the Industrial Frequency Transformer of a former limit winding and a plurality of secondary windings, each the secondary winding and the rectification circuit that is connected in series successively of described Industrial Frequency Transformer, filter circuit is connected with high-frequency impulse generation circuit, the positive output end and the negative output terminal of a plurality of high-frequency impulse generation circuit join end to end successively, the positive output end of first high-frequency impulse generation circuit is connected with load with the negative output terminal of last high-frequency impulse generation circuit, and described a plurality of high-frequency impulse generation circuit also are connected with the computer control of its conducting of control or disconnection.
Described high-frequency impulse generation circuit comprises pulse switch and fly-wheel diode, described pulse switch is series between described filter circuit and the positive output end, described fly-wheel diode is connected in parallel between described positive output end and the negative output terminal, and described pulse switch is connected with described computer control by driver element.Further, described pulse switch and fly-wheel diode also are serially connected with the pulse current detecting element respectively, and described pulse current detecting element is connected with described computer control by measuring unit.Described computer control is Programmable Logic Controller or industrial control computer, and described pulse switch is an igbt.
In technique scheme, the former limit winding of described Industrial Frequency Transformer and at least one side of secondary winding are delta connection, further, the former limit of described Industrial Frequency Transformer also is in series with the variable reactor that is used for regulating impulse power supply output amplitude and prevents to cause owing to the secondary load short circuits the excessive DC power supply control of electric current, and described variable reactor is connected with described computer control.
The utility model can obtain three kinds of power supplys based on the hf and hv pulse power supply of synchronous principle of stacking: DC power supply, the pulse power and mixing (direct current and pulse) power supply.Big and the serious technological deficiency that distorts of waveform at the pulse transformer electric energy loss in the prior art medium-high frequency high-voltage pulse power source, the utility model proposes a kind of technical scheme that does not adopt the hf and hv pulse transformer of high energy consumption, adopt the Industrial Frequency Transformer of many secondary to generate many group alternating voltages, after rectification and filtering, carrying out FMAM again transfers pulsewidth to superpose synchronously, both solved high-frequency impulse had been carried out the technical problem that transformation is brought the serious distortion of waveform, have the little advantage of energy consumption again, can save because of using crude oil electric dewatering (or salt) a large amount of electric energy that high-voltage pulse power source consumed of pulse transformer scheme.
The utility model is adopting computer control and high-frequency impulse generation circuit will organize on the technical scheme basis that DC power supply is superimposed as the hf and hv pulse power supply synchronously more, adopt the intelligent predicting control strategy to make high-voltage pulse power source export constant current, guarantee that electric dehydration (or salt) system has stable electric field, and have the output current of wide region, satisfied needs of production to greatest extent.
It is the technical scheme of delta connection that the former limit winding of the utility model Industrial Frequency Transformer and secondary winding adopt at least one side, has thoroughly eliminated triple-frequency harmonics, can not cause harmonic effects to system power supply.Simultaneously by variable reactor in the control of the former limit of Industrial Frequency Transformer series direct current power supply; computer control is regulated the resistance value of variable reactor according to secondary current; the utlity model has excess current protective function thereby make, even when load is short-circuited, system still can safe operation.
The utility model has creatively proposed the technical scheme of " friendship-straight-superimposed pulses is boosted " generation hf and hv pulse power supply, compared with prior art, the utlity model has that Frequency Adjustable, amplitude modulation, accent pulsewidth, current range are wide, no-harmonic wave pollution, advantage such as energy-conservation.The utility model is equally applicable to use the fields such as electric precipitation, radar emission, linear accelerator and food sterilization of the direct current or the pulse power.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the utility model hf and hv pulse power supply;
Fig. 2 is the structural representation of the utility model high-frequency impulse generation circuit;
Fig. 3 is the schematic diagram of the former and deputy limit of the utility model Industrial Frequency Transformer winding;
Fig. 4 is the circuit connection diagram of the utility model Industrial Frequency Transformer.
Description of reference numerals:
The 1-Industrial Frequency Transformer; The 2-rectification circuit; The 3-filter circuit;
4-high-frequency impulse generation circuit; 5-control and protective circuit; The 6-computer control;
7-DC power supply auxiliary circuit; The 8-load; The 9-variable reactor;
The 10-driver element; The 11-measuring unit; The 411/421-current measuring element;
The 412/422-pulse switch; The 413/423-current measuring element; The 414/424-fly-wheel diode;
The 415/425-positive output end; The 416/426-negative output terminal.
Embodiment
Fig. 1 is the structural representation of the utility model hf and hv pulse power supply, comprise Industrial Frequency Transformer 1, a plurality of rectification circuit 21,21...2N, a plurality of filter circuit 31,31...3N, a plurality of high-frequency impulse generation circuit 41,41...4N and computer control 6, wherein, Industrial Frequency Transformer 1 has a former limit winding and a plurality of secondary winding, one group of power frequency AC can be transformed to many group power frequency ACs.The quantity of rectification circuit, filter circuit and high-frequency impulse generation circuit is identical with secondary winding number, rectification circuit 21,22...2N are connected with each secondary winding successively, the power frequency AC of each secondary winding output all enters corresponding rectification circuit 21,22...2N, can carry out rectification with organizing power frequency AC, the many groups of output pulsating voltage power supply more.Filter circuit 31,32...3N are connected with rectification circuit 21,22...2N successively, will organize the pulsating voltage power supply more and carry out filtering, the many groups of output DC power supply.The input of high-frequency impulse generation circuit 41,42...4N is connected with filter circuit 31,32...3N successively, and the positive output end of the negative output terminal of each high-frequency impulse generation circuit and next high-frequency impulse generation circuit joins end to end successively, the positive output end of first high-frequency impulse generation circuit 41 is connected with load 8 with the negative output terminal of last high-frequency impulse generation circuit 4N, will organize more and export to load 8 after DC power supply is transformed to one group of high voltagehigh frequency pulse power.Computer control 6 has N control output end, control input end with a plurality of high-frequency impulse generation circuit 41,42...4N is connected respectively, be used to control high-frequency impulse generation circuit turn-on or the shutoff of setting quantity, make the high-frequency impulse generation circuit output of setting quantity have the pulse power in same pulse width and cycle, the final pulse power supply is superimposed as the high voltagehigh frequency pulse power synchronously.Computer control 6 provides with frequently with the pulsewidth synchronous control signal, and based on principle of stacking, when the wherein a part of high-frequency impulse generation circuit of control is opened, when another part turn-offed, the output voltage of the different amplitudes that can superpose out was realized the amplitude adjustment of out-put supply.This control signal has certain pulse duration and duty ratio simultaneously, makes the high voltagehigh frequency pulse power of output have the pulse duration and the frequency of setting, and does not have restriction mutually between power supply amplitude, pulse duration and the frequency.The utility model technique scheme both can guarantee good output waveform, had output pulse width, amplitude and frequency adjustable characteristics arbitrarily again, and control procedure is very simple and direct, reliable.
In technique scheme, each high-frequency impulse generation circuit comprises pulse switch and fly-wheel diode, pulse switch is connected between filter circuit and the positive output end, fly-wheel diode is connected in parallel between positive output end (negative pole of corresponding diode) and the negative output terminal (positive pole of corresponding diode), pulse switch is connected with computer control 6 by driver element 10, finish closed and disconnected according to the control signal that computer control 6 sends, also comprise the pulse current detecting element that is connected in series with pulse switch and fly-wheel diode respectively, the pulse current detecting element is connected with computer control 6 by measuring unit 11.Fig. 2 is the structural representation of the utility model high-frequency impulse generation circuit, has only illustrated high-frequency impulse generation circuit 41 and 42, and other structures and operation principle are identical.Wherein pulse switch 412 is connected with computer control 6 by driver element 10 respectively with 422, the negative output terminal 416 of high-frequency impulse generation circuit 41 is connected with the positive output end 425 of high-frequency impulse generation circuit 42, and the positive output end 415 of high-frequency impulse generation circuit 41 is connected load 8 respectively with the negative output terminal 426 of high-frequency impulse generation circuit 42.The course of work of its output high frequency pulse power supply is: computer control 6 sends high level by driver element 10 to pulse switch 412,422, pulse switch 412,422 conductings, its positive output end 415,425 is exported one group of high frequency pulse power supply respectively, fly-wheel diode 414,424 is in cut-off state, because the negative output terminal 416 of high-frequency impulse generation circuit 41 and the positive output end 425 of high-frequency impulse generation circuit 42 are connected, so two groups of high frequency pulse power supply stacks synchronously are after-applied in load.Computer control 6 sends high level to pulse switch 412, send zero level to pulse switch 422, pulse switch 412 conductings, one group of high frequency pulse power supply of its positive output end 415 outputs, fly-wheel diode 414 is in cut-off state, and pulse switch 422 disconnects simultaneously, fly-wheel diode 424 is in conducting state, high-frequency impulse generation circuit 42 is by short circuit, and no-output is so have only one group of high frequency pulse power supply to be applied in the load 8.From technique scheme as can be seen, the utility model can be realized the adjusting of power supply amplitude, pulse duration and pulse frequency wide region by high-frequency impulse generation circuit, wherein the cooperation of pulse switch 412,422...4N2 and fly-wheel diode 414,424...4N4 can be regulated the voltage amplitude of high frequency pulse power supply, the closure of pulse switch 412,422...4N2, the frequency that can regulate high frequency pulse power supply opening time and pulse duration.
In the utility model technique scheme, the igbt (IGBT) that pulse switch selects for use development in recent years to get up is realized, igbt has that operating rate is fast, input impedance is high, thermal stability is good, driving is simple, blocking voltage is high and advantage such as current capacity is strong, can satisfy complicated industrial requirements.The more important thing is that igbt can guarantee that the utility model can export bigger electric current, this is very necessary for requiring the big electric dehydration of current range (or salt) field.All pulse current detecting elements are connected with computer control 6 by measuring unit 11, whether the action of monitoring high-frequency impulse generation circuit is consistent with order, the break-make of the signal that pulse current detecting element 411...4N1 and pulse current detecting element 414...4N4 are detected should be complementary, realize in-service monitoring and carry out failure diagnosis, improve the reliability of the utility model control.
In technical solutions of the utility model, computer control 6 is realized by antijamming capability strong Programmable Logic Controller PLC or industrial control computer, is exported the pulse signal with certain pulse duration and duty ratio to high-frequency impulse generation circuit.Computer control 6 also is connected with control and protective circuit 5 and DC power supply auxiliary circuit 7 respectively, is used to whole system that defencive functions such as overcurrent, overvoltage, overload and short circuit are provided.
Simultaneously, computer control 6 can be according to oil-water ratio state or profit (or salt) equivalent resistance size in the jar, in conjunction with the pulse current detecting element 411...4N1 that gathers by measuring unit 11, the current signal of 414...4N4,41...4N carries out Synchronization Control to high-frequency impulse generation circuit, reaches the purpose of constant current output.In the technical process of electric dehydration, for the battery lead plate in the dehydrator is not short-circuited, high-frequency impulse must disappear before the emulsion short circuit forms, and made the emulsion short circuit disappear, by the time recovering the back, insulation property send next pulse again, to guarantee the stability of electric field.But there are uncertain factors such as oil quality, oil-water ratio state, oily salt equivalent resistance size in the actual production, therefore, the utility model computer control adapts to needs of production fully according to the technical scheme that the online calculation control rule of detection signal also changes waveform, amplitude and the frequency of the high voltagehigh frequency pulse power thereupon, has important and practical meanings.
Fig. 3 is the schematic diagram of the former and deputy limit of the utility model Industrial Frequency Transformer winding, and former limit winding is common A, B, C three-phase, and secondary is made of the winding of a plurality of equal numbers, can realize one group of power frequency AC is transformed to many group power frequency ACs.It is delta connection that its limit, Central Plains winding, secondary winding have a side at least, and the triple-frequency harmonics to disappear and to be produced by rectification can not cause harmful effect to system power supply.If former limit winding does not adopt delta connection, in order to eliminate the triple-frequency harmonics that produces at the rectification circuit rectifier, all secondary windings should adopt identical delta connection.Fig. 3 is suitable for for single phase alternating current power supply too for the AC power of three-phase input, the utility model.In addition, each rectification circuit of the utility model is made up of 6 rectifier diodes, and each filter circuit is big electric capacity.
Fig. 4 is the circuit connection diagram of the utility model Industrial Frequency Transformer.In order to regulate to the secondary output of Industrial Frequency Transformer 1, the utility model has been connected in series the variable reactor 9 of DC power supply control on the former limit of Industrial Frequency Transformer 1, its control end is connected with computer control 6, size by regulating direct voltage is with regard to its impedance magnitude of scalable, thereby regulates the output of Industrial Frequency Transformer 1.Simultaneously, because computer control 6 is connected with pulse current detecting element 411...4N1,414...4N4 on the secondary circuit, computer control 6 is according to the resistance value of secondary circuit current data adjusting variable reactor 9, and final realization is to the control of secondary loop current.Thereby especially the electric current of load 8 is also very little when short circuit appears in load 8 can play a protective role to the utility model for technique scheme.Changing voltage magnitude by control variable reactor 9 is that outer voltage is regulated.Stack change voltage magnitude by control high-frequency impulse generation circuit 41...4N is that voltage inter-loop is regulated.
Further specify the technical solution of the utility model below by specific embodiment.
Embodiment one: the control procedure of the DC power supply of 8000 volts of voltages of output
Suppose that each filter circuit is output as 800 volts of DC power supply, when needs are exported the DC power supply of 8000 volts of voltages, computer control 6 sends the high level drive signal by driver element 10 to 10 high-frequency impulse generation circuit 41,42...410, simultaneously send the zero level drive signal to remaining high-frequency impulse generation circuit 411,412...4N, whether computer control 6 is monitored all signals by measuring unit 11 and pulse current detecting element consistent with order.When not needing the output DC source, computer control 6 sends the zero level drive signal to all high-frequency impulse generation circuit.
In fact, 10 high-frequency impulse generation circuit not only are limited in first to the tenth, and computer control 6 can send high level to any 10 high-frequency impulse generation circuit, also can realize effect same.
Embodiment two: the control procedure of exporting 4000 volts of voltages, 0.05 millisecond of pulsewidth, the high voltagehigh frequency pulse power in 0.1 millisecond of cycle
Suppose that each filter circuit is output as 800 volts of DC power supply, when the designed high voltagehigh frequency pulse power of needs, it is that 0.05 millisecond, cycle are 0.1 millisecond pulse drive signal that computer control 6 sends pulse duration by driver element 10 to any 5 high-frequency impulse generation circuit, simultaneously send the zero level drive signal to all the other N-5 high-frequency impulse generation circuit, whether computer control 6 all signals of monitoring are consistent with order.When not needing to export the designed pulse power, computer control 6 sends the zero level drive signal to all high-frequency impulse generation circuit.
Embodiment three: the control procedure of exporting the direct current AC-battery power source of 4000 volts of voltages, 0.05 millisecond of pulsewidth, the high voltagehigh frequency pulse power in 0.1 millisecond of cycle and 8000 volts of voltages
The foregoing description one and 2 two kinds of situations of embodiment are combined and can realize.
Prior art adopts the mode of " friendship-straight-transformer boosts " to produce the hf and hv pulse power supply usually, promptly earlier AC power is carried out forming high-frequency impulse after rectification, filtering and the inversion, boost by high frequency transformer again, after the hf rectifier rectification forms hf and hv pulse.The utility model technique scheme has creatively proposed to produce based on " friendship-straight-superimposed pulses is boosted " of synchronous principle of stacking the technical scheme of hf and hv pulse power supply, compared with prior art, the utility model does not adopt the high voltagehigh frequency pulse transformer scheme of highly energy-consuming, thereby can save at present existing crude oil electric dewatering (or salt) a large amount of electric energy that high-voltage pulse power source consumed, have simultaneously that Frequency Adjustable, amplitude modulation, accent pulsewidth, current range are wide, a no-harmonic wave pollution, advantage such as energy-conservation.
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (7)
1, a kind of hf and hv pulse power supply, it is characterized in that, comprise that one has the Industrial Frequency Transformer of a former limit winding and a plurality of secondary windings, each the secondary winding and the rectification circuit that is connected in series successively of described Industrial Frequency Transformer, filter circuit is connected with high-frequency impulse generation circuit, the positive output end and the negative output terminal of a plurality of high-frequency impulse generation circuit join end to end successively, the positive output end of first high-frequency impulse generation circuit is connected with load with the negative output terminal of last high-frequency impulse generation circuit, and described a plurality of high-frequency impulse generation circuit also are connected with the computer control of its conducting of control or disconnection.
2, hf and hv pulse power supply as claimed in claim 1, it is characterized in that, described high-frequency impulse generation circuit comprises pulse switch and fly-wheel diode, described pulse switch is connected between described filter circuit and the positive output end, described fly-wheel diode is connected in parallel between described positive output end and the negative output terminal, and described pulse switch is connected with described computer control by driver element.
3, hf and hv pulse power supply as claimed in claim 2 is characterized in that, described pulse switch and fly-wheel diode also are serially connected with the pulse current detecting element respectively, and described pulse current detecting element is connected with described computer control by measuring unit.
4, as the arbitrary described hf and hv pulse power supply of claim 1～3, it is characterized in that described computer control is Programmable Logic Controller or industrial control computer.
5, as claim 2 or 3 described hf and hv pulse power supplys, it is characterized in that described pulse switch is an igbt.
6, hf and hv pulse power supply as claimed in claim 1 is characterized in that, the former limit winding of described Industrial Frequency Transformer and at least one side of secondary winding are delta connection.
7, as claim 1 or 6 described hf and hv pulse power supplys, it is characterized in that, the former limit of described Industrial Frequency Transformer also is in series with the variable reactor that is used for regulating impulse power supply output amplitude and prevents to cause owing to the secondary load short circuits the excessive DC power supply control of electric current, and described variable reactor is connected with described computer control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620002364 CN2882106Y (en) | 2006-02-17 | 2006-02-17 | High frequency high voltage pulse power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620002364 CN2882106Y (en) | 2006-02-17 | 2006-02-17 | High frequency high voltage pulse power supply |
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| Publication Number | Publication Date |
|---|---|
| CN2882106Y true CN2882106Y (en) | 2007-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620002364 Expired - Lifetime CN2882106Y (en) | 2006-02-17 | 2006-02-17 | High frequency high voltage pulse power supply |
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| CN (1) | CN2882106Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895226A (en) * | 2010-07-13 | 2010-11-24 | 西南交通大学 | Superconducting energy storage impulse power electrical source |
| CN101452755B (en) * | 2007-11-30 | 2012-02-15 | 北京市电力公司 | Large current pulse power supply suitable for electromagnetical repulsion force repulsion mechanism |
-
2006
- 2006-02-17 CN CN 200620002364 patent/CN2882106Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452755B (en) * | 2007-11-30 | 2012-02-15 | 北京市电力公司 | Large current pulse power supply suitable for electromagnetical repulsion force repulsion mechanism |
| CN101895226A (en) * | 2010-07-13 | 2010-11-24 | 西南交通大学 | Superconducting energy storage impulse power electrical source |
| CN101895226B (en) * | 2010-07-13 | 2012-12-12 | 西南交通大学 | Superconducting energy storage impulse power electrical source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090506 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |