CN116345725B - Novel voltage gain continuously adjustable photonic transformer and efficiency optimization method thereof - Google Patents
Novel voltage gain continuously adjustable photonic transformer and efficiency optimization method thereof Download PDFInfo
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- CN116345725B CN116345725B CN202310014616.3A CN202310014616A CN116345725B CN 116345725 B CN116345725 B CN 116345725B CN 202310014616 A CN202310014616 A CN 202310014616A CN 116345725 B CN116345725 B CN 116345725B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005457 optimization Methods 0.000 title claims abstract description 20
- 230000004907 flux Effects 0.000 claims abstract description 8
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 230000001965 increasing effect Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
-
- 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]
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The application discloses a novel voltage gain continuously adjustable photonic transformer and an efficiency optimization method thereof, aiming at the problem that the traditional photonic transformer can only discretely adjust the voltage gain by changing the number of photonic devices, the novel photonic transformer continuously adjusts luminous flux by controlling current variables so as to change output voltage, thereby realizing continuous adjustment of the voltage gain; meanwhile, the novel photon transformer performs energy conversion and coupling through photons, realizes ripple-free voltage conversion for DC-DC transmission, has the advantages of small size and low electromagnetic interference, and solves the problems of large size, large output ripple, electromagnetic interference and the like in the magnetic coupling energy conversion of the traditional transformer. Meanwhile, three novel efficiency optimization methods of the photon transformer are disclosed, the problem that the efficiency of the traditional photon transformer is low is solved, the working efficiency of the photon transformer is improved through efficiency optimization, and the application occasions of the photon transformer are expanded.
Description
Technical Field
The application relates to the field of electric energy conversion, in particular to a novel voltage gain continuously adjustable photonic transformer and an efficiency optimization method thereof.
Background
The traditional transformer is widely applied to the field of electric energy transmission and transformation, is an AC-AC transmission mode, performs energy conversion through magnetic coupling, has the problems of large volume, large output voltage ripple and serious electromagnetic interference, is difficult to apply to occasions needing high-quality output, and generally needs to be additionally provided with a filter in order to improve the output quality, so that the volume and cost of equipment are increased.
The photon transformer is a novel transformer for energy conversion by taking photons as a medium, is DC-DC transmission, can realize ripple-free voltage conversion, and has the advantages of small volume, light weight and low electromagnetic interference, thereby solving the problems of the traditional transformer. However, the existing photon transformer can only discretely adjust the voltage gain by changing the number of photon devices, and has low efficiency, which limits the application occasions of the photon transformer.
The application discloses a novel voltage gain continuously adjustable photon transformer and an efficiency optimization method thereof, which aim to overcome the problems in the prior art, provide the novel voltage gain continuously adjustable photon transformer, and provide three efficiency optimization methods, wherein the novel photon transformer has high-quality electric energy output, is suitable for occasions needing to use the high-quality electric energy output such as precise operational amplifier, and can effectively solve the problems in the traditional transformer and the existing photon transformer.
Disclosure of Invention
The application discloses a novel voltage gain continuously adjustable photonic transformer and an efficiency optimization method thereof, aiming at the problem that the traditional photonic transformer can only discretely adjust the voltage gain by changing the number of photonic devices, the novel photonic transformer continuously adjusts luminous flux by controlling current variables so as to change output voltage, thereby realizing continuous adjustment of the voltage gain; meanwhile, the novel photon transformer performs energy conversion and coupling through photons, realizes ripple-free voltage conversion for DC-DC transmission, has the advantages of small size and low electromagnetic interference, and solves the problems of large size, large output ripple, electromagnetic interference and the like in the magnetic coupling energy conversion of the traditional transformer. Meanwhile, three novel efficiency optimization methods of the photon transformer are disclosed, the problem that the efficiency of the traditional photon transformer is low is solved, the working efficiency of the photon transformer is improved through efficiency optimization, and the application occasions of the photon transformer are expanded.
Drawings
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. Other figures may be derived from these figures without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a novel voltage gain continuously adjustable photonic transformer of the present application;
FIG. 2 is a diagram showing a specific method for continuously adjusting the voltage gain of a novel voltage gain continuously adjustable sub-transformer according to the present application;
FIG. 3 is a simplified circuit diagram of N emitting side LEDs;
fig. 4 is a schematic diagram of three efficiency optimization methods of a novel voltage gain continuously adjustable photonic transformer according to the present application.
Wherein: i d Output current for current source, V d For the voltage, V, of the LED on the emission side o For receiving voltage, R of side photovoltaic PV assembly s,LED Series resistance R for LED on emission side sh,LED Parallel resistor for LED on emitting side, I LED For the current, I, of the LED on the emission side ph For generating current, I h Leakage current, I, for a receive side photovoltaic PV assembly o For load side current, R s,PV Series resistance, R for receive side photovoltaic PV modules sh,PV Parallel resistor, P, for receiving side photovoltaic PV modules d Power, P, for emitting side LED heat For radiating heat, R of LED on emitting side jc And R is hs Thermal resistances of the LED and the radiator at the emission side, F v Output luminous flux E for emitting side LED v The illuminance is output for the emitting side LED.
Detailed Description
In order to make the objects, technical solutions and features of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
For easy understanding, please refer to fig. 1, the present application provides a novel voltage gain continuously adjustable photonic transformer, comprising: the device comprises a current adjustable constant voltage module, a photon transformer module and an output module;
the current adjustable constant voltage module comprises a current source for outputting adjustable current I d Supplying an emitting side LED;
the photon transformer module comprises an emitting side LED and a receiving side photovoltaic PV component, and is used for transmitting and converting photon energy;
the output module comprises a load;
the positive electrode of the current source is connected with the positive electrode of the LED at the emitting side;
the negative electrode of the current source is connected with the negative electrode of the LED at the emitting side;
the positive electrode of the receiving side Photovoltaic (PV) component is connected with the first end of the load;
the negative pole of the receiving side photovoltaic PV assembly is connected to the second end of the load.
The application provides a novel voltage gain continuously adjustable photonic transformer, referring to fig. 2, fig. 2 uses an emitting side LED and a receiving side photovoltaic module as an embodiment, and considers series-parallel resistors of the emitting side LED and the receiving side photovoltaic module, and the specific adjustment mode is as follows:
current adjustable constant voltage module:
the current source outputs continuously adjustable current I to the LED at the emitting side d The emitting side LED obtains a constant voltage V d 。
A photonic transformer module:
output power P of LED on emission side d The method comprises the following steps:
P d ＝V d I d
since the current source outputs continuously adjustable current I to the LED at the emitting side d The emitting side LED obtains a constant voltage V d Output power P of LED on emission side d Also follow the adjustable current I d Is continuously adjustable.
Output luminous flux F of the LED on the emission side v And output power P d The following relationship exists:
alpha and beta are performance parameters of the emitting side LED, a simplified circuit of the emitting side LED is shown in fig. 3, and alpha and beta are derived specifically as follows:
α＝NE o [1+k e (T a -T o )]
β＝NE o k e k h (R jc +NR hs )
wherein E is o At rated temperature T o Lower luminous efficiency, T a Is the ambient temperature, k e K is the relative rate at which the luminous efficiency decreases with increasing temperature h As the heat dissipation coefficient, the LED at the emitting side emits heat P heat ＝k h P d Therefore, the heat dissipation coefficient is smaller than 1.
Thus, the output power P d Continuously adjustable variation of the output luminous flux F of the LED on the emission side v So that the output luminous flux F of the LED on the emitting side v Is also continuously adjustable, and the output illuminance E of the LED at the emitting side v ＝F v S is continuously adjustable, and the receiving side photovoltaic PV component receives continuously adjustable illuminance E v Generating a continuously adjustable photo-generated current I ph The method comprises the following steps:
I ph ＝kE v ＝kF v /S
k is illuminance E v And photo-generated current I ph Is a proportional coefficient of the photo-generated current I ph With the output illuminance E v Is varied by a continuous variation of S, S being the illuminated surface area.
And an output module:
as shown in fig. 2, the reception-side optical PV module receives continuously adjustable illuminance E v Generating a continuously adjustable photo-generated current I ph Then output current I o The method comprises the following steps:
I o ＝I ph -I h -I sh
wherein I is h To receive leakage current of side photovoltaic PV modules, I sh Parallel resistor R for receiving side photovoltaic PV assembly sh,PV The current flowing through the branch is due to the parallel resistance R sh,PV Larger, so I sh Negligible.
Two important parameters of a receive side photovoltaic PV assembly are the open circuit voltage U oc And short-circuit current I sc Both parameters are equal to the photo-generated current I ph The related concrete steps are as follows:
I sc ＝I ph
open circuit voltage U of receive side photovoltaic PV assembly oc And short-circuit current I sc With photo-generated current I ph Where k is the boltzmann constant, q is the electron charge, and T is the absolute temperature.
In summary, the novel voltage gain continuously adjustable optical sub-transformer is continuously adjustable current I output by a current source d Continuously varying the output power P of the LEDs on the emission side d Thereby continuously changing the luminous flux F of the LED on the emitting side v Illuminance E v The photon transformer takes photons as an energy transmission medium, so that the light-receiving side optical PV component generates continuously adjustable photo-generated current I ph Finally, the continuous adjustment of the voltage gain of the photon transformer is realized.
In order to solve the problem of lower efficiency of the traditional photon transformer, the application provides three photon transformer efficiency optimization methods, as shown in fig. 4, specifically:
the optimization method comprises the following steps: the reflection glass is additionally arranged around the emitting side LEDs and the receiving side photovoltaic PV assemblies, and when a plurality of emitting side LEDs and a plurality of receiving side photovoltaic PV assemblies exist, the reflection glass is additionally arranged around each group of devices, so that the photon energy dissipation is reduced;
and the optimization method II comprises the following steps: a transparent light guide medium AIGaN is filled between the emitting side LED and the receiving side photovoltaic PV component, so that photon energy coupling is enhanced;
and the optimization method is as follows: the use of multiple emitting side LEDs to align fewer receiving side photovoltaic PV assemblies essentially increases efficiency by enhancing the emitting side LED photon energy.
In summary, the application discloses a novel voltage gain continuously adjustable photonic transformer, and simultaneously discloses an efficiency optimization method of three novel photonic transformers, which aims to solve the problems of voltage gain dispersion and lower efficiency of the traditional photonic transformers, realize continuous adjustment of the voltage gain of the photonic transformers through current source adjustment, improve the working efficiency of the photonic transformers through efficiency optimization, and expand application occasions of the photonic transformers.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; the embodiments disclosed herein are described in order to enable a person skilled in the art to make or use the present application, and the technical solutions described in the foregoing embodiments may be modified or some technical features thereof may be replaced by equivalent ones; such substitutions and modifications do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (1)
1. The utility model provides a novel voltage gain continuously adjustable photonic transformer and efficiency optimization method thereof, which is characterized in that the method comprises the following steps: the system comprises a current adjustable constant voltage module, a photon transformer module, an output module and an efficiency optimization method;
the current adjustable constant voltage module comprises a current source;
the photon transformer module comprises an emitting side LED and a receiving side PV component;
the output module comprises a load;
the positive electrode of the current source is connected with the positive electrode of the emitting side LED;
the negative electrode of the current source is connected with the negative electrode of the emitting side LED;
the positive electrode of the receiving side Photovoltaic (PV) component is connected with the first end of the load;
the negative electrode of the receiving side Photovoltaic (PV) component is connected with the second end of the load;
the input of the current adjustable constant voltage module is the current source, and the current source outputs continuous adjustable current I to the photon transformer module d The LED voltage at the emitting side is a constant voltage V d ；
The current source outputs continuously adjustable current I to the LED at the emitting side d The power P of the LED at the emitting side d Luminous flux F v And illuminance E v With said electricityThe current source outputs a continuously adjustable current I d But is continuously adjustable;
the output module receives the continuously adjustable illuminance E generated by the LED at the emitting side through the photovoltaic PV component at the receiving side v Thereby generating a continuously adjustable photo-generated current I ph The voltage and current at the output side are changed as follows:
α＝NE o [1+k e (T a -T o )]
β＝NE o k e k h (R jc +NR hs )；
I ph ＝kE v ＝kF v /S
I o ＝I ph -I h -I sh
I sc ＝I ph
wherein alpha and beta are the performance parameters of the LED on the emitting side, the specific values of which are determined according to the actual LED device, E o At rated temperature T o Lower luminous efficiency, T a Is the ambient temperature, k e K is the relative rate at which the luminous efficiency decreases with increasing temperature h Is the heat dissipation coefficient, N is the number of LEDs at the emitting side, R jc And R is hs Thermal resistances of the LED on the emitting side and the radiator, respectively, k is illuminance E v And photo-generated current I ph Is the ratio coefficient of the light surface area, S is U oc To receive the open circuit voltage of a side photovoltaic PV assembly, I o For output current, q is electron charge, T is absolute temperature, I sc For short-circuit current, I h To receive leakage current of side photovoltaic PV modules, I sh Parallel resistor R for receiving side photovoltaic PV assembly sh,PV The current flowing through the branch is due to the parallel resistance R sh,PV Larger, so I sh Negligible.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310014616.3A CN116345725B (en) | 2023-01-05 | 2023-01-05 | Novel voltage gain continuously adjustable photonic transformer and efficiency optimization method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310014616.3A CN116345725B (en) | 2023-01-05 | 2023-01-05 | Novel voltage gain continuously adjustable photonic transformer and efficiency optimization method thereof |
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| CN116345725A CN116345725A (en) | 2023-06-27 |
| CN116345725B true CN116345725B (en) | 2023-12-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359160A (en) * | 2002-01-10 | 2002-07-17 | 中国科学院长春光学精密机械与物理研究所 | Organic film double-function device with photo and electricity conversion |
| CN103441566A (en) * | 2013-09-12 | 2013-12-11 | 重庆大学 | System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery |
| CN103456828A (en) * | 2011-11-10 | 2013-12-18 | 郭磊 | Semiconductor photoelectric power converter |
| CN204205969U (en) * | 2014-08-18 | 2015-03-11 | 珠海格力电器股份有限公司 | Power converter and photovoltaic air conditioning system applying same |
| CN115020399A (en) * | 2022-06-08 | 2022-09-06 | 河北云伯科技有限公司 | Module assembling type photoelectric energy coupler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090188549A1 (en) * | 2008-01-29 | 2009-07-30 | Mtvp Corporation | Method of and apparatus for improved thermophotonic generation of electricity |
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- 2023-01-05 CN CN202310014616.3A patent/CN116345725B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359160A (en) * | 2002-01-10 | 2002-07-17 | 中国科学院长春光学精密机械与物理研究所 | Organic film double-function device with photo and electricity conversion |
| CN103456828A (en) * | 2011-11-10 | 2013-12-18 | 郭磊 | Semiconductor photoelectric power converter |
| CN103441566A (en) * | 2013-09-12 | 2013-12-11 | 重庆大学 | System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery |
| CN204205969U (en) * | 2014-08-18 | 2015-03-11 | 珠海格力电器股份有限公司 | Power converter and photovoltaic air conditioning system applying same |
| CN115020399A (en) * | 2022-06-08 | 2022-09-06 | 河北云伯科技有限公司 | Module assembling type photoelectric energy coupler |
Non-Patent Citations (1)
| Title |
|---|
| High-performance photonic transformers for DC voltage conversion;Bo Zhao等;Nature communications;1-10 * |
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Effective date of registration: 20240730 Address after: Room 1-2034, Building 4, Fengjing Mall, No. 9135, Zhufeng Road, Jinshan District, Shanghai, 201500 Patentee after: SHANGHAI QINXUAN INFORMATION TECHNOLOGY Co.,Ltd. Country or region after: China Address before: No.729, Dongfeng East Road, Yuexiu District, Guangzhou City, Guangdong Province 510060 Patentee before: GUANGDONG University OF TECHNOLOGY Country or region before: China |