CN104467467A - Scheme for converting microwave energy into direct current during large dynamics - Google Patents
Scheme for converting microwave energy into direct current during large dynamics Download PDFInfo
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- CN104467467A CN104467467A CN201510006805.1A CN201510006805A CN104467467A CN 104467467 A CN104467467 A CN 104467467A CN 201510006805 A CN201510006805 A CN 201510006805A CN 104467467 A CN104467467 A CN 104467467A
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- rectification
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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
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/066—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode particular circuits having a special characteristic
Abstract
The invention discloses a high-efficiency rectification circuit scheme for converting microwave energy into direct current in the process of working under large dynamic power input to overcome the detects that in the prior art, during large dynamic power input, a match circuit is high in design difficulty, low in rectification efficiency and the like. According to the technical scheme, the rectification circuit scheme is characterized by being composed of multiple levels of rectification circuits; each level of rectification circuit is composed of a circulator, a rectifier diode array and a filter circuit; the different levels of rectification circuits can be arranged according to different magnitudes of input power and dynamics. According to one-way channels of the circulators and the characteristic that inversion has high isolation, the scheme that the circulators are applied to the multi-level microwave rectification circuits is put forward for the first time; reflective waves generated by a circuit mismatch is recovered to the next level of circuit by utilizing the characteristic of the one-way channels of the circulators so that rectification can be performed again. According to the scheme, the defects that due to non-linear characteristics of the rectifier diodes, the rectifier diodes present different impedance characteristics during different power inputs, and then an impedance mismatch is caused are overcome; besides, the rectification match circuits are greatly simplified, and high rectification efficiency under the large dynamic power input condition is guaranteed.
Description
Technical field
The present invention relates to microwave transmission energy technologies field, particularly microwave rectifier circuit technology
Background technology
Microwave power transmission becomes an important research direction of new energy field, microwave power transmission take microwave as the wireless transmission that carrier can realize energy, the Energy Transfer between solar power plant, microwave power transmission technology implementation space and grounded receiving station can be utilized, also can be used for the field such as powering to spacecraft.And rectification circuit is as the important component part of microwave power transmission, to directly affect the efficiency of whole microwave power transmission system, but the technological innovation about rectification circuit existed at present is nearly all for improving capturing of the difficult problems such as power capacity, the rectification efficiency improved under certain steady job state, does not also improve the effective ways of rectification efficiency under the input of Larger Dynamic power.In existing rectification circuit, need match circuit between rectifier diode and signal input part, match circuit by the input resistant matching of diode under specific input power to 50 ohm in case mate with signal source make to reflect reduce so that more energy feed-in circuit to improve rectification efficiency.Under specific input power, though the method can obtain good return loss, but because the diode in rectification circuit is a kind of non-linear element, different impedance operators is presented under the input of different power, different operating frequency, be difficult to ensure that the match circuit of single rectification circuit realizes impedance matching, more can not solve the return loss problem that impedance mismatching causes when Larger Dynamic power inputs.Echo not only makes a large amount of energy dissipation and greatly reduces the efficiency of whole microwave power transmission system, if the reflective wave transmission tieback receiving end produced is radiate by reception antenna, will produce serious secondary radiation problem.
Summary of the invention
Subject matter to be solved by this invention, be exactly the shortcoming such as match circuit complex structure for existing rectification circuit, provide a kind of Larger Dynamic microwave energy to be converted to the scheme of direct current, it is applicable to the rectification circuit of different capacity input.In traditional rectification circuit, different impedance operators is presented under the input of different power, different operating frequency, be difficult to ensure that the match circuit of single rectification circuit realizes impedance matching, receiving circuit part can produce reflected wave and cause energy loss because of impedance mismatching, affect rectification efficiency, the multi-stage rectifying circuit based on circulator that the present invention introduces, the reflected wave produced by impedance mismatching is carried out secondary rectification, not only solve reflected wave secondary radiation problem, can also fully reclaim reflected wave and improve rectification efficiency.
The present invention solve the technical problem, and the technical scheme of employing is:
At receiving terminal access circulator, circulator is a multiport device, and wherein electromagnetic transmission can only be gone in ring along one direction, has high-isolation in the other direction.As Fig. 1, with circulator port 1. for input, 2. port is first order input, and this termination rectification circuit, 3. port connects second level rectification circuit.Can set different progression according to different circuit requirements, when increasing progression, 3. circulator port accesses next circulator again, and accesses rectification circuit and next stage rectification circuit successively.
The present invention, according to the operation principle of circulator, utilizes the half-duplex channel characteristic of circulator, proposes circulator to be used in rectification circuit first.In traditional rectification circuit, rectification efficiency a big chunk reason on the low side can not make full use of the energy imported into.In traditional technology, when rectification circuit receives different power signals, due to the nonlinear characteristic of diode, inevitably because of changed power, impedance mismatching produces reflected wave to rectification circuit, in traditional rectification circuit, reflected wave directly imports input radiation again into, will affect whole commutation system efficiency, even if existing portion of techniques is at diode front end access filter, but can not reflected wave be isolated, more can not be made full use of and cause energy dissipation.And in the present invention, the access of circulator not only effectively can suppress the generation of this phenomenon, the lower Single port that also transmitted wave can be recycled to circulator carries out secondary rectification, this not only can change reflected wave and high order harmonic component to the impact of whole circuit, more can carry the transfer ratio of high-octane utilance and rectification circuit.
The present invention has the very strong property transformed.A kind of new multi-stage rectifying circuit proposed by the invention can meet different circuit requirements, when circuit is in low-power, little dynamic input state, then only can select a circulator, only use stage circuit, access match circuit can utilize simple structure to realize high efficiency rectification.When circuit need be operated under high power state, several circulators can be selected to design different progression to improve power upper limit and the rectification efficiency of circuit.And the circulator of varying number is accessed according to different circuit requirements.
Accompanying drawing explanation
Fig. 1 is the solution principle figure that Larger Dynamic microwave energy of the present invention is converted to direct current
Fig. 2 is the circuit theory diagrams being applicable to lower-wattage, incoming frequency change of the present invention
Fig. 3 is the multi-stage rectifying circuit theory diagrams being applicable to high power, Larger Dynamic input of the present invention
Embodiment
Below in conjunction with accompanying drawing and instantiation, operation principle of the present invention and syndeton are described in detail.
Embodiment 1
This example applies the present invention to explanation when being applicable to lower-wattage, incoming frequency change.When input power is lower, incoming frequency change time, can only need a circulator, several rectifier diodes, several filter capacitors just can form structure simply and the high rectification circuit of efficiency.
As Fig. 2, Larger Dynamic input energy regenerating commutation technique scheme of the present invention is combined with traditional rectification circuit by this example, eliminates the match circuit part of commutation system, can improve conventional rectifier circuit structure complexity and inefficient defect.Adopt the array of rectifier diodes of a circulator, four diode formations and the rectification circuit of two diode series connection in this circuit, when electric current is after first order rectifier circuit rectifies, 3. the port of circulator reclaims reflected wave and carries out secondary rectification.This circuit not only avoid reflux when not needing match circuit and is back to input, and under also reflected wave can being recycled to circulator, rectification circuit that Single port connects carries out fully rectification again.
Embodiment 2
This example is concrete introduction when applying the present invention to higher-wattage input.As shown in Figure 3, be the rectification circuit schematic diagram that the present invention is applied to the multilevel energy recovery of Larger Dynamic input, it comprises circulator, array of rectifier diodes at different levels, further comprises filter circuit and DC load.This example is for three port circulators, and progression is chosen to be three grades and is introduced.
First order rectification circuit comprises containing circulator M1, array of rectifier diodes D1 and filter capacitor C1, C2.Because first order circuit requirement can bear the input of higher-wattage, eight diodes are comprised in the diode array chosen, now the peak power that can bear of this branch circuit is the octuple of single diode, when receiving high power AC signal, AC signal is converted into direct current by alternating current most of after diode array D1, also has part high order harmonic component by filter capacitor C2 elimination, because input next stage circuit is carried out secondary rectification by the non-linear reflected wave caused of diode.The effect of filter capacitor C1 is isolated DC electricity, avoids the direct current after diode rectification to flow into circulator M1.
Second level rectification circuit comprises circulator M2, array of rectifier diodes D2, filter capacitor C3, C4.This grade of circuit is second level rectification circuit, therefore only needs the diode array be made up of 4 diodes to carry out rectification.After circulator M2 receives the current signal transmitted by first order circuit, be sent to 2. port and connect second level rectification circuit and carry out rectification.The high order harmonic component that this grade produces carries out filtering process by filter capacitor C4, finally the reflected wave produced in this grade is sent to next stage rectification circuit.The effect of filter capacitor C3 is isolated DC electricity, avoids the direct current after diode rectification to flow into circulator M2.
Third level rectification circuit comprises circulator M3, array of rectifier diodes D3, filter circuit C5, C6.After front two-stage circuit, also unrectified signal is not strong, and this grade selects two diode arrays can reach the effect of abundant rectification, can obtain stable direct current signal after rectification by filter capacitor C6 filtering.A 3rd port order diode D4 and filter capacitor C8 of circulator M3 does last energy regenerating rectification, finally the direct current parallel connection after rectification at different levels is delivered to DC load.The effect of filter capacitor C5, C7 is isolated DC electricity, avoids the direct current after diode rectification to flow into circulator.
Above example is only and thought of the present invention is described, also according to physical circuit condition of work, can carry out increase and decrease and regulate, increase and decrease the number of diodes in rectifier diode the progression of rectification.
Claims (6)
1. a Larger Dynamic microwave energy is converted to direct current scheme, it is a kind of multilevel energy rectification recovery scheme, it is characterized in that, the program reclaims rectification circuit by multilevel energy and forms, rectification again after the energy regenerating of the reflected wave that upper level circuit middle impedance mismatch causes by every one-level rectification circuit.
2. multilevel energy rectification recovery scheme as claimed in claim 1, it is characterized in that, this grade of energy recovering circuit scheme is made up of N level branch rectification circuit.N is determined by the size of input power and dynamic range, and power input is larger or power is dynamic larger, and N should larger (N >=1).
3. branch as claimed in claim 2 rectification circuit, it is characterized in that, every one-level rectification circuit is made up of a circulator, array of rectifier diodes, a filter circuit.
4. rectification circuit as claimed in claim 3, it is characterized in that, described circulator is three port one-way transmission devices, in optional three ports any one be both port of origination 1., and be followed successively by port 2., 3. along transmission direction, the transmission direction of circulator along fixed-direction 1. → 2. → 3. → 1. transmit.Circulator is arranged on the input of every stage circuit, and 1. port is connected with input, and 2. port is connected with rectification circuit, and 3. port is connected with secondary commutation circuit input end.
5. rectification circuit as claimed in claim 3, it is characterized in that, described array of rectifier diodes, in every stage circuit, rectifier diode quantity is different, according to the number of diodes that the input of different power is arranged in every grade of array of rectifier diodes, and the quantity of diode is successively decreased step by step.
6. Larger Dynamic microwave energy as claimed in claim 1 is converted to direct current scheme, and it is characterized in that, this multi-level pmultistage circuit every grade has direct current to export, and output is sent to load by after the direct current output-parallel of N level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510006805.1A CN104467467A (en) | 2015-01-07 | 2015-01-07 | Scheme for converting microwave energy into direct current during large dynamics |
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| CN201510006805.1A CN104467467A (en) | 2015-01-07 | 2015-01-07 | Scheme for converting microwave energy into direct current during large dynamics |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979916A (en) * | 2015-07-30 | 2015-10-14 | 郑州携能通信技术有限公司 | Microwave energy harvesting method and microwave energy harvesting device |
| CN106406416A (en) * | 2016-11-01 | 2017-02-15 | 郑州携能通信技术有限公司 | Microwave energy rectifying device and method |
| CN111095672A (en) * | 2017-08-30 | 2020-05-01 | 激光系统 | Microwave rectification circuit |
| CN111918436A (en) * | 2019-05-09 | 2020-11-10 | 青岛海尔智能技术研发有限公司 | Power output circuit and microwave heating equipment |
| CN112421798A (en) * | 2019-08-03 | 2021-02-26 | 深圳市正南风科技有限公司 | Device for generating electricity by utilizing darkson and mobile terminal |
| CN112737147A (en) * | 2020-12-10 | 2021-04-30 | 重庆大学 | Large dynamic high-efficiency microwave rectification scheme based on non-magnetic non-reciprocal network |
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| CN101807947A (en) * | 2002-02-19 | 2010-08-18 | Ipg电子504有限公司 | Be used for eliminating the method for reflecting part of the signal of testing circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104979916A (en) * | 2015-07-30 | 2015-10-14 | 郑州携能通信技术有限公司 | Microwave energy harvesting method and microwave energy harvesting device |
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| CN111095672A (en) * | 2017-08-30 | 2020-05-01 | 激光系统 | Microwave rectification circuit |
| CN111095672B (en) * | 2017-08-30 | 2021-09-07 | 激光系统 | Microwave rectification circuit |
| CN111918436A (en) * | 2019-05-09 | 2020-11-10 | 青岛海尔智能技术研发有限公司 | Power output circuit and microwave heating equipment |
| CN112421798A (en) * | 2019-08-03 | 2021-02-26 | 深圳市正南风科技有限公司 | Device for generating electricity by utilizing darkson and mobile terminal |
| CN112737147A (en) * | 2020-12-10 | 2021-04-30 | 重庆大学 | Large dynamic high-efficiency microwave rectification scheme based on non-magnetic non-reciprocal network |
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