CN102891539A - Self-excitation tracking power amplifier for wireless electrical energy transmission system - Google Patents
Self-excitation tracking power amplifier for wireless electrical energy transmission system Download PDFInfo
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- CN102891539A CN102891539A CN201210401022XA CN201210401022A CN102891539A CN 102891539 A CN102891539 A CN 102891539A CN 201210401022X A CN201210401022X A CN 201210401022XA CN 201210401022 A CN201210401022 A CN 201210401022A CN 102891539 A CN102891539 A CN 102891539A
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Abstract
The invention discloses a self-excitation tracking power amplifier for a wireless electrical energy transmission system, belonging to the transmission and transformation fields of wireless electrical energy; the amplifier can provide reliable power guarantee for transmitting and transforming the electrical energy effectively in the range of several meters and has a broad market prospect. Direct current electrical energy is transformed into high-frequency alternating current electrical energy and the high-frequency alternating current electrical energy is then fed to an electromagnetic coupling resonance source coil by using the self-excitation oscillation principles of the colpitts circuit and matching a frequency selective network and a pressure lifting link so as to realize efficient wireless transmission of the electrical energy. The self-excitation tracking power amplifier mainly comprises a direct current power supply (1), voltage-limiting protection (2), a frequency selective network (3), a pressure lifting link (4), feed regulation (5), an amplifying link (6) and a source coil (7). The amplifier provided by the invention can provide power guarantee for transmitting wireless electrical energy in the range of several meters; and the amplifier has the advantages of efficiency, safety, reliability, low cost and maintenance charge, convenience in operation, intelligence, controllability and the like.
Description
Technical field
The wireless power transmission technology is one of most active hot research direction in present electrical engineering field, it is the advanced subject that integrates basic research and application study, be the new research field of a multidisciplinary strong intersection of the outer academia of Present Domestic and industrial quarters exploration, contain many technical fields such as electromagnetic field, power electronic technology, electric power system, control technology, physics, materialogy, information technology.Adopt the wireless power mode can effectively overcome all kinds of defectives that the electric wire connected mode exists, realize freely powering of electronic apparatus, have important application expection and vast potential for future development.
The present invention---radio energy transmission system self-excitation tracking power amplifier, based on the wireless power transmission know-why, defer to the theory of self-oscillation amplification and optimal design, design efficient wireless power transmission power amplifier, can give full play to the electrical characteristic of electromagnetic coupled resonator system, provide the reliable source of power guarantee when can be the load wireless power supply in the several meters scopes, can be widely used in public electricity-using occasion or the various power utilization environment that has potential safety hazard.
Background technology
The wireless power transmission technology is broadly divided into three kinds: the first is the inductive coupling type electric energy transmission, and it utilizes the loosely coupled transformer principle to pass energy, and generally there are the core device that reduces the loop magnetic resistance in transmitting terminal and receiving terminal.The second is electromagnetic coupled resonant mode delivery of electrical energy, by inductance on the resonator of high quality factor and distributed capacitor generation resonance transmitting energy.The third is electromagnetic radiation formula delivery of electrical energy, and electric energy is converted into microwave form in this technology, and transmission range exceedance km can be realized the teletransmission of electric energy.Wherein the electromagnetic coupled harmonic technology utilizes non-radiative electromagnetic field near-field region to finish delivery of electrical energy, than induction biography energy, in transmission range very large expansion has been arranged on the one hand; Compare on the other hand the electromagnetic radiation formula and pass energy, the near-field region energy has radiationless characteristics, and this technology has preferably fail safe, therefore obtains at present very large concern and research.
Summary of the invention
Technical problem to be solved by this invention is under the theory guiding of self-oscillation amplification and optimal design, electromagnetic coupled resonance type wireless electric energy transmission system high frequency electric source to be designed the self-excitation tracking power amplifier of realization high efficient and reliable.
The technical solution adopted in the present invention is: radio energy transmission system self-excitation tracking power amplifier; include DC power supply (1) by connecting frequency-selective network (3) behind the voltage-limiting protection (2); after through the network of lifting pressure ring joint (4), feedback regulation (5), amplifying element (6) composition; the energy persistent oscillation also is exaggerated; finally be loaded on the source coil (7), finish high-frequency high-power output.
The described pressure ring joint (4) of lifting forms by the low-loss litz wire coiling with certain cross-sectional area, comprises elementary low-pressure side and secondary high pressure side two parts.Elementary low-pressure side adopts the number of turn less and cross section and larger litz wire coiling, and the secondary high pressure side employing number of turn is more and cross section and less litz wire coiling, is high voltage-small current power thereby can low-voltage, high-current be turned power transfer by the principle of electromagnetic induction.
Described feedback regulation (5) adopts amplifier circuit to realize, wherein comprises current-limiting resistance, base resistance, biasing resistor and feedback resistance, and the degree by dividing potential drop ratio adjustment feedback on the resistance.
Described source coil (7) shows through realizing self having certain inductance value after the silver-plated antirust processing by having certain thickness individual pen low-loss copper tube, is responsible for loading the high-frequency electromagnetic energy.Source coil (7) and lift the inductance value series connection of pressure ring joint (4) after and the Capacitance parallel connection of frequency-selective network (3) jointly determined the operating frequency of power amplifier.
Radio energy transmission system self-excitation tracking power amplifier of the present invention; by DC power supply (1) through being loaded on behind the voltage-limiting protection (2) on the amplifying element (6); cooperate under the effect of feedback regulation (5) and equivalent inductance and electric capacity that the non-linear fixed ampllitude characteristic of power amplifier tube realizes high-frequency electromagnetic oscillation in the amplifying element (6); be High frequency electromagnetic power with the direct solenoid power transfer and be loaded on the source coil (7), thereby provide stable supply of electric power for the wireless power transmission that realizes high efficient and reliable in the several meters scopes.
Description of drawings
Fig. 1 is overall structure figure of the present invention;
Fig. 2 is the structure chart of lifting pressure ring joint (4);
Fig. 3 is the structure chart of feedback regulation (5);
Fig. 4 is the structure chart of source coil (7);
Fig. 5 is the fundamental diagram of radio energy transmission system self-excitation tracking power amplifier.
Wherein:
(1): DC power supply; (2): voltage-limiting protection; (3): frequency-selective network; (4): lift the pressure ring joint; (5): feedback regulation; (6): amplifying element; (7): source coil.
R
1: current-limiting resistance R
2: base resistance R
3With R
4: biasing resistor R
5With R
7: feedback resistance R
6: load resistance C
1: coarse adjustment fixed capacity C
2: fine setting variable capacitance C
3: feedback capacity C
4: alternating current bypass capacity MOS: mosfet field-effect transistor BG: feedback transistor L
s: the source coil inductance
Embodiment
Below in conjunction with example and accompanying drawing radio energy transmission system self-excitation tracking power amplifier of the present invention is made a detailed description.
As shown in Figure 1, radio energy transmission system self-excitation tracking power amplifier of the present invention includes: DC power supply (1); voltage-limiting protection (2), frequency-selective network (3) is lifted pressure ring joint (4); feedback regulation (5), amplifying element (6), source coil (7).
As shown in Figure 2, the described pressure ring joint (4) of lifting forms by the low-loss litz wire coiling with certain cross-sectional area, comprises elementary low-pressure side and secondary high pressure side two parts.When amplifying element (6) normal operation is also successfully set up higher-order of oscillation mode of operation, High frequency electromagnetic power will be loaded into the primary side of lifting pressure ring joint (4).According to electromagnetic induction principle, the low-voltage, high-current of elementary low-pressure side turns power and will be converted to high voltage-small current power and be loaded into the secondary high pressure side.
As shown in Figure 3, described feedback regulation (5) adopts amplifier circuit to realize, wherein comprises alternating voltage negative feedback function.Route R is propped up in the alternating voltage negative feedback
5, C
3Form, output voltage feeds back to input through this branch road.Because signal and the applied signal voltage of the output of amplifier are anti-phase each other on phase place, so the introducing of feedback signal has weakened the effect of original input signal, be the voltage negative feedback.R
5The size of control amount of negative feedback, C
3Play the logical interchange of stopping direct current.When the AC signal amplitude of input was excessive, if there is not the negative feedback branch road, amplifier will enter state saturated or cut-off, makes output signal the top distortion occur cutting.Therefore the generation of distortion has been avoided in degenerative introducing.
As shown in Figure 4, described source coil (7) shows through realizing self having certain inductance value after the silver-plated antirust processing by having certain thickness individual pen low-loss copper tube.On the one hand, source coil (7) and lift the inductance value series connection of pressure ring joint (4) after and the Capacitance parallel connection of frequency-selective network (3) jointly determined the operating frequency of power amplifier.On the other hand, when electromagnetic power is loaded on the source coil (7), will produce the territory, reactive near-field region at the surrounding space of source coil (7).At this moment, in case when having other forms of resonator close, jumbo delivery of electrical energy will occur.
As shown in Figure 5; described radio energy transmission system self-excitation tracking power amplifier; by DC power supply (1) through being loaded on behind the voltage-limiting protection (2) on the amplifying element (6); cooperate under the effect of feedback regulation (5) and equivalent inductance and electric capacity that the non-linear fixed ampllitude characteristic of power amplifier tube realizes high-frequency electromagnetic oscillation in the amplifying element (6); be High frequency electromagnetic power with the direct solenoid power transfer and be loaded on the source coil (7), thereby provide stable supply of electric power for the wireless power transmission that realizes high efficient and reliable in the several meters scopes.
Claims (2)
1. radio energy transmission system self-excitation tracking power amplifier; it is characterized in that including DC power supply (1) by connecting frequency-selective network (3) behind the voltage-limiting protection (2); after through the network of lifting pressure ring joint (4), feedback regulation (5), amplifying element (6) composition; the energy persistent oscillation also is exaggerated; finally be loaded on the source coil (7), finish high-frequency high-power output.
2. source coil according to claim 1 (7) shows through realizing self having certain inductance value after the silver-plated antirust processing by having certain thickness individual pen low-loss copper tube, is responsible for loading the high-frequency electromagnetic energy; Source coil (7) and lift the inductance value series connection of pressure ring joint (4) after and the Capacitance parallel connection of frequency-selective network (3) jointly determined the operating frequency of power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210401022XA CN102891539A (en) | 2012-10-19 | 2012-10-19 | Self-excitation tracking power amplifier for wireless electrical energy transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210401022XA CN102891539A (en) | 2012-10-19 | 2012-10-19 | Self-excitation tracking power amplifier for wireless electrical energy transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105247780A (en) * | 2013-05-24 | 2016-01-13 | 凯孚尔有限公司 | High frequency oscillator, high frequency welding system and method for controlling the frequency using said type of high frequency oscillator |
| CN112072941A (en) * | 2020-09-03 | 2020-12-11 | 武汉大学 | Phase synchronization detection method and device based on IPT parallel multi-inverter |
-
2012
- 2012-10-19 CN CN201210401022XA patent/CN102891539A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105247780A (en) * | 2013-05-24 | 2016-01-13 | 凯孚尔有限公司 | High frequency oscillator, high frequency welding system and method for controlling the frequency using said type of high frequency oscillator |
| US10239261B2 (en) | 2013-05-24 | 2019-03-26 | Kiefel Gmbh | High frequency oscillator, high frequency welding system and method for controlling the frequency using said type of high frequency oscillator |
| CN112072941A (en) * | 2020-09-03 | 2020-12-11 | 武汉大学 | Phase synchronization detection method and device based on IPT parallel multi-inverter |
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Application publication date: 20130123 |