CN102891624B - Pulse power stable output device - Google Patents
Pulse power stable output device Download PDFInfo
- Publication number
- CN102891624B CN102891624B CN201210358071.XA CN201210358071A CN102891624B CN 102891624 B CN102891624 B CN 102891624B CN 201210358071 A CN201210358071 A CN 201210358071A CN 102891624 B CN102891624 B CN 102891624B
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- transistor
- comparator
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2176—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention relates to a pulse power stable output device, which comprises a PWM (Pulse Width Modulation)/PFM (Pulse Frequency Modulation) driving unit. The pulse power stable output device is characterized in that the output end of the PWM/PFM driving unit is connected with the control end of a transistor; one end of the transistor is connected with one end of a resistor and the positive input end of a comparer; the other end of the resistor is grounded; the negative input end of the comparer is connected with the output end of a pulse reference generating unit, and the output end of the comparer is connected with the control end of the PWM/PFM driving unit; the other end of the transistor is connected with one end of an energy-storage induction coil; the other end of the energy-storage induction coil is connected with the output end anode of a full-bridge rectifying circuit and the input end of the pulse reference generating unit; and the input end of the full-bridge rectifying circuit is connected with the input of the commercial electricity. The pulse power stable output device is stable in output power and has the advantages of simple circuit structure, simple manufacturing process, low manufacturing cost and the like.
Description
Technical field
The present invention relates to a kind of pulse power output device, especially a kind of pulse power stable output device.
Background technology
At present, in order to make power stage more stable and power factor (PF) is high, multiplier is generally all adopted in conjunction with comparator to the method for control PWM/PFM driver element.But utilize the device that the method makes, complex structure, complex manufacturing, cost is higher.As shown in Figure 1, Fig. 1 is existing pulse power output device schematic diagram.Please refer to Fig. 1, in this device, first comparator is by contrast reference voltage and input voltage, Output rusults is input in a multiplier, after this multiplier carries out corresponding computing according to this result and a multiplying signal, result is input in one second comparator, this second comparator is controlled by a control signal, thus controls a PWM/PFM driver element.This PWM/PFM driver element exports a high level or a low level, in order to control the break-make of transistor Q, thus control transformer T is load supplying, realize high power factor, but synchronously cannot realize power stability to export, feed back to PWM/PFM driver element after needing to detect power output and control.
Summary of the invention
In view of this, the object of this invention is to provide a kind of pulse power stable output device, this device is exported more stable, and circuit structure is simpler.
The present invention adopts following scheme to realize: a kind of pulse power stable output device, comprise PWM/PFM driver element (i.e. pulse-width modulator or pulse frequency modulator), it is characterized in that: described PWM/PFM driver element output connects the control end of a transistor; One end of described transistor connects one end of a resistance and the positive input terminal of a comparator; Described resistance other end ground connection; The negative input end of described comparator connects the output of a pulsation benchmark generating unit, and the output of described comparator connects the control end of described PWM/PFM driver element; The other end of described transistor connects one end of an energy storage inductor coil; The other end of described energy storage inductor coil connects the output head anode of a full bridge rectifier and the input of described pulsation benchmark generating unit; The input of described full bridge rectifier connects civil power input.
In an embodiment of the present invention, described pulsation benchmark generating unit, comprise a comparator, it is characterized in that: the output of described comparator connects one end of one first resistance, one end of one second resistance and the positive terminal of a diode, the negative input end of described comparator connects one end of an electric capacity and the negative pole end of described diode, and the positive input terminal of described comparator connects a reference voltage; The other end ground connection of described second resistance; The other end ground connection of described electric capacity; The other end of described first resistance is as the input of described pulsation benchmark generating means; The output of described comparator is as the output of described pulsation benchmark generating means.
In an embodiment of the present invention, also comprise a power supply coil, one end ground connection of described power supply coil, the other end of described power supply coil connects the described power end of pulsation benchmark generating unit and the power end of PWM/PFM driver element through a rectifying and wave-filtering network, and described power supply coil and described energy storage coil are wound on same magnetic core.
In an embodiment of the present invention, also comprise a start-up circuit, the input of described start-up circuit connects the output of described full bridge rectifier, and the output of described start-up circuit connects the described power end of pulsation benchmark generating unit and the power end of PWM/PFM driver element.
In an embodiment of the present invention, also comprise a rectifying and wave-filtering network, the input of described rectifying and wave-filtering network connects one end of described resistance, and the output of described rectifying and wave-filtering network connects the positive input terminal of described comparator.
In an embodiment of the present invention, also comprise a load and a power stage coil, described power stage coil is described load supplying through a rectifying and wave-filtering network, and described power stage coil and described energy storage coil are wound on same magnetic core.
In an embodiment of the present invention, also comprise a load, the input of described load connects the output head anode of described full bridge rectifier, and the output of described load connects the other end of described energy storage coil; Described energy storage coil through a rectifying and wave-filtering network be described load supplying.
In an embodiment of the present invention, described transistor is metal-oxide-semiconductor; The grid of described metal-oxide-semiconductor is as the control end of described transistor, and the source electrode of described metal-oxide-semiconductor is as one end of described transistor, and the drain electrode of described metal-oxide-semiconductor is as the other end of described transistor.
In an embodiment of the present invention, described transistor is triode; The base stage of described triode is as the control end of described transistor, and the emitter of described triode is as one end of described transistor, and the collector electrode of described triode is as the other end of described transistor
Pulse power stable output device of the present invention has stable output power, and circuit structure is simple, and manufacture craft is simple, the advantages such as cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is existing pulse power output device schematic diagram.
Fig. 2 is a kind of pulse power stable output device schematic diagram of the present invention.
Fig. 3 is the schematic diagram of benchmark generating unit of pulsing in a kind of pulse power stable output device in the embodiment of the present invention.
Fig. 4 is a kind of pulse power stable output device one embodiment of the present invention schematic diagram.
Fig. 5 is a kind of another embodiment schematic diagram of pulse power stable output device of the present invention.
The schematic diagram that Fig. 6 is mains input voltage Vin of the present invention, reference voltage V f and the voltage V3 after the rectifying and wave-filtering network be made up of the 3rd diode D3 and the 3rd electric capacity C3 of pulsing is synchronous.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, below by specific embodiment and relevant drawings, the present invention will be described in further detail.
The present embodiment provides a kind of pulse power stable output device, comprises PWM/PFM driver element, it is characterized in that: described PWM/PFM driver element output connects the control end of a transistor; One end of described transistor connects one end of a resistance and the positive input terminal of a comparator; Described resistance other end ground connection; The negative input end of described comparator connects the output of a pulsation benchmark generating unit, and the output of described comparator connects the control end of described PWM/PFM driver element; The other end of described transistor connects one end of an energy storage inductor coil; The other end of described energy storage inductor coil connects the output head anode of a full bridge rectifier and the input of described pulsation benchmark generating unit; The input of described full bridge rectifier connects civil power input.
As shown in Figure 2, Fig. 2 is a kind of pulse power stable output device schematic diagram of the present invention.Please refer to Fig. 2, the present embodiment provides a kind of pulse power stable output device, comprises PWM/PFM driver element 3, it is characterized in that: described PWM/PFM driver element 3 output connects the control end of a transistor Q; One end of described transistor Q connects one end of a resistance R and the positive input terminal of a comparator 2; Described resistance R other end ground connection; The negative input end of described comparator 2 connects the output of a pulsation benchmark generating unit 1, and the output of described comparator 2 connects the control end of described PWM/PFM driver element 3; The other end of described transistor Q connects one end of an energy storage inductor coil L; The other end of described energy storage inductor coil L connects the output head anode of a full bridge rectifier and the input of described pulsation benchmark generating unit 1; The input of described full bridge rectifier connects civil power input Vin.
As shown in Figure 3, Fig. 3 is the schematic diagram of benchmark generating unit of pulsing in a kind of pulse power stable output device in the embodiment of the present invention.Please refer to Fig. 3, the present embodiment provides a kind of pulsation benchmark generating unit, comprise a comparator, it is characterized in that: the output of described comparator connects the positive terminal of one end of one first resistance R1, one end of one second resistance R2 and a diode D, the negative input end of described comparator connects one end of an electric capacity C and the negative pole end of described diode D, the positive input terminal of described comparator connects a reference voltage, and the voltage stabilizing value of described reference voltage is 0.7V; The other end ground connection of described second resistance R2; The other end ground connection of described electric capacity C; The other end of described first resistance R1 is as the input of described pulsation benchmark generating means; The output of described comparator is as the output of described pulsation benchmark generating means.
As shown in Figure 4, Fig. 4 is a kind of pulse power stable output device one embodiment of the present invention schematic diagram.Please refer to Fig. 4, the present embodiment provides a kind of pulse power stable output device, comprises PWM/PFM driver element 3, it is characterized in that: described PWM/PFM driver element 3 output connects the grid of a metal-oxide-semiconductor Q; The source electrode of described metal-oxide-semiconductor Q connects one end of a resistance R and the input of a rectifying and wave-filtering network be made up of the 3rd diode D3 and the 3rd electric capacity C3; The output of the described rectifying and wave-filtering network be made up of with the 3rd electric capacity C3 the 3rd diode D3 is connected the positive input terminal of a comparator 2; Described resistance R other end ground connection; The negative input end of described comparator 2 connects the output of a pulsation benchmark generating unit 1, and the output of described comparator 2 connects the control end of described PWM/PFM driver element 3; The drain electrode of described metal-oxide-semiconductor Q connects the second end of a transformer T primary coil; The first end of described transformer T primary coil connects the output of a load 4; The input of described load 4 connects the output of a full bridge rectifier and the input of described pulsation benchmark generating unit 1; The input of described full bridge rectifier connects civil power input Vin.Also comprise a power supply coil, described power supply coil second end ground connection, described power supply coil first end is connected the described power end of pulsation benchmark generating unit 1 and the power end of PWM/PFM driver element 3 through the rectifying and wave-filtering network that is made up of the second diode D2 and the second electric capacity C2.Also comprise a start-up circuit 5, the input of described start-up circuit 5 connects the output of described full bridge rectifier, and the output of described start-up circuit 5 connects the described power end of pulsation benchmark generating unit 1 and the power end of PWM/PFM driver element 3.Also comprise a rectifying and wave-filtering network be made up of the first diode D1 and the first electric capacity C1, it is that described load 4 is powered that described transformer T primary coil passes through this network.
As shown in Figure 5, Fig. 5 is a kind of another embodiment schematic diagram of pulse power stable output device of the present invention.Please refer to Fig. 5, the present embodiment provides a kind of pulse power stable output device, comprises PWM/PFM driver element 3, it is characterized in that: described PWM/PFM driver element 3 output connects the base stage of a NPN type triode Q; The emitter of described NPN type triode Q connects one end of a resistance R and the input of a rectifying and wave-filtering network be made up of the 3rd diode D3 and the 3rd electric capacity C3; The output of the described rectifying and wave-filtering network be made up of with the 3rd electric capacity C3 the 3rd diode D3 is connected the positive input terminal of a comparator 2; Described resistance R other end ground connection; The negative input end of described comparator 2 connects the output of a pulsation benchmark generating unit 1, and the output of described comparator 2 connects the control end of described PWM/PFM driver element 3; The collector electrode of described NPN type triode Q connects the second end of a transformer T primary coil; The first end of described transformer T primary coil connects the output of a full bridge rectifier and the input of described pulsation benchmark generating unit 1; The input of described full bridge rectifier connects civil power input Vin.Also comprise a power supply coil, described power supply coil second end ground connection, described power supply coil first end is connected the described power end of pulsation benchmark generating unit 1 and the power end of PWM/PFM driver element 3 through the rectifying and wave-filtering network that is made up of the second diode D2 and the second electric capacity C2.Also comprise a start-up circuit 5, the input of described start-up circuit 5 connects the output of described full bridge rectifier, and the output of described start-up circuit 5 connects the described power end of pulsation benchmark generating unit 1 and the power end of PWM/PFM driver element 3.Also comprise a load 4, the power stage coil of described transformer T is that described load 4 is powered through the rectifying and wave-filtering network that is made up of the first diode D1 and the first electric capacity C1.
Continue referring to Fig. 5, the principle that the following describes above-described embodiment is as follows:
When starting this device, civil power input Vin to be charged for electric capacity C2 by start-up circuit 5 and provides voltage for pulsation benchmark generating unit 1 and PWM/PFM driver element 3 after a full bridge rectifier.PWM/PFM driver element 3 exports a high level and makes its conducting to the base stage of NPN type triode Q, now, civil power input Vin passes through transformer T primary coil after full bridge rectifier, then through NPN type triode Q, flow through a resistance R to ground, form a current path.Because the current sampling effect of resistance R, resistance R both end voltage by the rectifying and wave-filtering network that is made up of diode D3 and electric capacity C3 for comparator 2 provides the feedback voltage of a positive input terminal.This feedback voltage is due to the existence of the primary coil of transformer T, can slowly become large along with the startup of circuit, until when this feedback voltage is greater than the pulsation reference voltage that pulsation benchmark generating unit 1 provides for the negative input end of comparator 2, control comparator 2 and export a high level, this high level control PWM/PFM driver element 3 exports a low level.The base stage of NPN type triode Q is only carried because being applied with low level, and the power stage coil of transformer T starts to release energy to load, and power supply coil also charges to electric capacity C2.When the power supply coil output voltage of transformer T reduces to 0V because fault offset is complete, the output voltage of PWM/PFM driver element reverts to high voltage again, enters next circulation.As shown in Figure 6, because pulsation reference voltage V f is synchronous with mains input voltage Vin and stable, so the voltage V3 of PEV peak envelope voltage after the rectifying and wave-filtering network be made up of the 3rd diode D3 and the 3rd electric capacity C3 of the electric current of sampling is synchronous with civil power and stable on resistance R, realizes power stage and stablize.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a pulse power stable output device, comprises PWM/PFM driver element, it is characterized in that: described PWM/PFM driver element output connects the control end of a transistor; One end of described transistor connects one end of a resistance and the positive input terminal of one first comparator; Described resistance other end ground connection; The negative input end of described first comparator connects the output of a pulsation benchmark generating unit, and the output of described first comparator connects the control end of described PWM/PFM driver element; The other end of described transistor connects one end of an energy storage inductor coil; The other end of described energy storage inductor coil connects the output head anode of a full bridge rectifier and the input of described pulsation benchmark generating unit; The input of described full bridge rectifier connects civil power input; Described pulsation benchmark generating unit, comprise one second comparator, the output of described second comparator connects one end of one first resistance, one end of one second resistance and the positive terminal of a diode, the negative input end of described second comparator connects one end of an electric capacity and the negative pole end of described diode, and the positive input terminal of described second comparator connects a reference voltage; The other end ground connection of described second resistance; The other end ground connection of described electric capacity; The other end of described first resistance is as the input of described pulsation benchmark generating means; The output of described second comparator is as the output of described pulsation benchmark generating means.
2. pulse power stable output device according to claim 1, it is characterized in that: also comprise a power supply coil, one end ground connection of described power supply coil, the other end of described power supply coil connects the described power end of pulsation benchmark generating unit and the power end of PWM/PFM driver element through a rectifying and wave-filtering network, and described power supply coil and described energy storage inductor coil winding are on same magnetic core.
3. pulse power stable output device according to claim 2, it is characterized in that: also comprise a start-up circuit, the input of described start-up circuit connects the output of described full bridge rectifier, and the output of described start-up circuit connects the described power end of pulsation benchmark generating unit and the power end of PWM/PFM driver element.
4. pulse power stable output device according to claim 1, it is characterized in that: also comprise a rectifying and wave-filtering network, the input of described rectifying and wave-filtering network connects one end of described resistance, and the output of described rectifying and wave-filtering network connects the positive input terminal of described first comparator.
5. pulse power stable output device according to claim 1, it is characterized in that: also comprise a load and a power stage coil, described power stage coil is described load supplying through a rectifying and wave-filtering network, and described power stage coil and described energy storage inductor coil winding are on same magnetic core.
6. pulse power stable output device according to claim 1, it is characterized in that: also comprise a load, the input of described load connects the output head anode of described full bridge rectifier, and the output of described load connects the other end of described energy storage inductor coil; Described energy storage inductor coil through a rectifying and wave-filtering network be described load supplying.
7. pulse power stable output device according to claim 1, is characterized in that: described transistor is metal-oxide-semiconductor; The grid of described metal-oxide-semiconductor is as the control end of described transistor, and the source electrode of described metal-oxide-semiconductor is as one end of described transistor, and the drain electrode of described metal-oxide-semiconductor is as the other end of described transistor.
8. pulse power stable output device according to claim 1, is characterized in that: described transistor is triode; The base stage of described triode is as the control end of described transistor, and the emitter of described triode is as one end of described transistor, and the collector electrode of described triode is as the other end of described transistor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210358071.XA CN102891624B (en) | 2012-09-25 | 2012-09-25 | Pulse power stable output device |
| PCT/CN2013/073682 WO2014048102A1 (en) | 2012-09-25 | 2013-04-03 | Stable pulse power output apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210358071.XA CN102891624B (en) | 2012-09-25 | 2012-09-25 | Pulse power stable output device |
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| Publication Number | Publication Date |
|---|---|
| CN102891624A CN102891624A (en) | 2013-01-23 |
| CN102891624B true CN102891624B (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210358071.XA Expired - Fee Related CN102891624B (en) | 2012-09-25 | 2012-09-25 | Pulse power stable output device |
Country Status (2)
| Country | Link |
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| CN (1) | CN102891624B (en) |
| WO (1) | WO2014048102A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891624B (en) * | 2012-09-25 | 2015-01-07 | 吴槐 | Pulse power stable output device |
| CN110323938A (en) * | 2019-08-05 | 2019-10-11 | 杭州嘉楠耘智信息科技有限公司 | Supply voltage following device and calculating equipment |
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| CN2188818Y (en) * | 1994-01-31 | 1995-02-01 | 清华大学 | Full-automatic control constant-voltage and constant current-limiting electronic charger |
| CN101005722A (en) * | 2006-01-20 | 2007-07-25 | 松下电器产业株式会社 | Light emitting diode drive apparatus |
| CN102238780A (en) * | 2010-04-30 | 2011-11-09 | 安森美半导体贸易公司 | Control circuit of light-emitting element |
| CN102651613A (en) * | 2011-02-28 | 2012-08-29 | 昂宝电子（上海）有限公司 | System and method used for constant-voltage mode and constant-current mode in flyback supply convertor |
| CN202841005U (en) * | 2012-09-25 | 2013-03-27 | 福州凡普科技有限公司 | Stable pulse power output device |
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| US7054170B2 (en) * | 2004-01-05 | 2006-05-30 | System General Corp. | Power-mode controlled power converter |
| US7750616B2 (en) * | 2007-06-21 | 2010-07-06 | Green Mark Technology Inc. | Buck converter LED driver circuit |
| TW201038129A (en) * | 2009-04-09 | 2010-10-16 | Sanyo Electric Co | Control circuit for light emitting element |
| CN201435677Y (en) * | 2009-06-19 | 2010-03-31 | Bcd半导体制造有限公司 | Flyback switch power supply |
| CN102684507A (en) * | 2011-03-17 | 2012-09-19 | 国琏电子（上海）有限公司 | Flyback switching power supply |
| CN102545636B (en) * | 2012-02-13 | 2014-03-12 | 辉芒微电子（深圳）有限公司 | Pulse frequency modulation (PFM) primary side feedback controller and PFM primary side feedback converter using same |
| CN102891624B (en) * | 2012-09-25 | 2015-01-07 | 吴槐 | Pulse power stable output device |
-
2012
- 2012-09-25 CN CN201210358071.XA patent/CN102891624B/en not_active Expired - Fee Related
-
2013
- 2013-04-03 WO PCT/CN2013/073682 patent/WO2014048102A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188818Y (en) * | 1994-01-31 | 1995-02-01 | 清华大学 | Full-automatic control constant-voltage and constant current-limiting electronic charger |
| CN101005722A (en) * | 2006-01-20 | 2007-07-25 | 松下电器产业株式会社 | Light emitting diode drive apparatus |
| CN102238780A (en) * | 2010-04-30 | 2011-11-09 | 安森美半导体贸易公司 | Control circuit of light-emitting element |
| CN102651613A (en) * | 2011-02-28 | 2012-08-29 | 昂宝电子（上海）有限公司 | System and method used for constant-voltage mode and constant-current mode in flyback supply convertor |
| CN202841005U (en) * | 2012-09-25 | 2013-03-27 | 福州凡普科技有限公司 | Stable pulse power output device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014048102A1 (en) | 2014-04-03 |
| CN102891624A (en) | 2013-01-23 |
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