CN101902083A - Inductive power transmission system with position self-setting function - Google Patents
Inductive power transmission system with position self-setting function Download PDFInfo
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Abstract
The invention discloses an inductive power transmission system with a position self-setting function, which comprises a transmission circuit, a pick-up circuit, a pulsed magnetic field generating circuit and a position setting circuit, wherein the transmission circuit is composed of a CD power supply, a high-frequency inverter, a primary resonance capacitor and an excitation coil, and the pick-up circuit is composed of a pickup coil, a secondary resonance capacitor, a power regulating circuit and a load; the pulsed magnetic field generating circuit is provided with a transmitting coil, and the transmitting coil and the excitation coil are wound on the same plane; and the position setting circuit is provided with a setting coil, and the setting coil and the pickup coil are wound on the same plane. The inductive power transmission system has the remarkable effects of having automatic tracking and locating functions of magnetic force line position, higher space flexibility of a pick-up mechanism, ensuring maximum energy pickup and transmission in the inductive power transmission system, and having simple circuit realized principle, convenient control, lower cost and wide application prospect.
Description
Technical field
The invention belongs to the electromagnetic induction technical field, specifically, is a kind of inductive electric energy transmission system with position self-setting function.
Background technology
Energy conduction based on electromagnetic induction principle, its efficiency of transmission mainly is to be determined by the effective area of the induction coupling surface in pick-up winding and magnetic field (being the equivalent vertical plane of the induction coil face and the magnetic line of force), because the spatial transmission characteristic and the strong decay feature in magnetic field, cause the space distance and bearing in induction coil and magnetic field to be subjected to very strict restriction, particularly when bigger angular deviation appears in the sensitive surface of pick-up winding and magnaflux method plane, the induction coupling efficiency can reduce greatly, makes energy-sensitive and efficiency of transmission be subjected to very large influence.Therefore for the relative position relation of energy mechanism for picking and energy emission magnetic field sources strict restriction is arranged based on induction electric energy transmission (IPT) system of electromagnetic induction coupling technique, this just require power receiving equipment must with a kind of spatial relationship closely of magnetic field, source maintenance.
In general the mode that its mechanism for picking of present inductive electric energy transmission system inserts magnetic field is divided into two kinds: a kind of is the point-to-point mode (being called separable transformer usually) of picking up, Chinese invention patent 200640424129.9 disclosed a kind of inductive coupled wireless power transfer devices are to adopt this mode, this mode is primarily aimed at the fixed point power supply of power receiving equipment, and the position of equipment is more fixing; Second kind of slidably mode of pressing close to that is based on the fixed current guide rail, this mode are primarily aimed at has the fixedly mobile power supply of motion track, and power supply unit must be in could normal power supply on the fixing motion track.
The shortcoming of prior art is: the locus of mechanism for picking and orientation relative fixed, the mobile very flexible of its mechanism for picking or power receiving equipment.Promotion feeling should be coupled the electric energy transmission system mechanism for picking dimensional orientation flexibility and can guarantee that ceiling capacity picks up and transmit, be an important topic of induction coupling electric energy transmission system research.Research about the multiple degrees of freedom pick-up capability aspect that promotes mechanism for picking has had not yet to see report.
Summary of the invention
The objective of the invention is to propose a kind of inductive electric energy transmission system, should guarantee the flexibility that the secondary energy mechanism for picking picks up at magnetic field space, realize that again ceiling capacity picks up and transmit with position self-setting function.
For achieving the above object, the invention provides a kind of inductive electric energy transmission system with position self-setting function, comprise radiating circuit and pick-up circuit, described radiating circuit is made up of DC power supply Vcc, high-frequency inverter, primary resonant electric capacity and excitation coil, and described pick-up circuit is made up of pick-up winding, secondary resonance electric capacity, power conditioning circuitry and load;
Its key is: also comprise pulsed magnetic field generation circuit and the orientation circuit of adjusting, be provided with transmitting coil in the described pulsed magnetic field generation circuit, this transmitting coil and described excitation coil coiling are at grade, adjust and be provided with the coil of adjusting in the circuit in described orientation, this adjusts coil and described pick-up winding coiling at grade.
Before powering load, produce the magnetic field B of adjusting by pulsed magnetic field generation circuit earlier ', coil carries out position self-setting by adjusting.Based on electromagnetic induction and electromagnetic force action principle, the described coil of adjusting is in the magnetic field B of adjusting ' in can induce synthesis power with certain driving direction, the coil of adjusting under this active force will rotate around its central shaft, finally rotates on the magnetic line of force normal direction in the magnetic field of adjusting.Owing to be on the body of three-dimensional mechanism for picking, to increase the auxiliary coil of adjusting, this adjusts coil and pick-up winding coiling at grade, again because transmitting coil and excitation coil also coiling at grade, so the magnetic field B of adjusting that produces by transmitting coil ' have identical normal direction with the magnetic line of force of induced field B by the excitation coil generation.After adjust, the coil plane of adjusting is positioned at the magnetic field B of adjusting by direction ' magnetic line of force normal direction on, so the pick-up winding plane also will be positioned on the magnetic line of force normal direction of induced field B, guaranteed the actual induction area maximum of pick-up winding and induced field.
Be provided with impulse circuit in the described pulsed magnetic field generation circuit, be connected with the positive terminal of DC power supply Vcc behind first input end string first mains switch of this impulse circuit, the negative pole end of this DC power supply Vcc connects second input of described impulse circuit, the described transmitting coil of serial connection between two outputs of described impulse circuit.
The high-frequency impulse magnetic field that the described magnetic field of adjusting produces for the dc pulse magnetic generation circuit, because transmitting coil in the pulsed magnetic field generation circuit and the excitation coil coiling in the radiating circuit are at grade, so the magnetic line of force in the magnetic field of adjusting has identical normal direction with the magnetic line of force of the induced field of excitation coil generation.
Be connected with the positive terminal of rectifier diode behind the described coil one end serial connection current-limiting resistance of adjusting, the negative pole end of this rectifier diode is connected on the other end of this coil of adjusting.
Serial connection current-limiting resistance and rectifier diode on the coil of adjusting, electric current one-way flow on the feasible coil of adjusting, with the electromagnetic force that guarantees to produce on the coil all the time in same direction, thereby impel coil to rotate, finally adjust to coil plane and the consistent equilbrium position of magnetic line of force normal direction around same direction.
The positive pole of described DC power supply Vcc is connected with the first input end of described high-frequency inverter through the second source switch, the negative pole of this DC power supply Vcc is connected on second input of high-frequency inverter, connect described primary resonant electric capacity between two outputs of described high-frequency inverter, at the two ends of primary resonant electric capacity and connect described excitation coil;
Connect described secondary resonance electric capacity between two inputs of described power conditioning circuitry, these secondary resonance electric capacity two ends described pick-up winding in parallel connects described load between two outputs of power conditioning circuitry.
Radiating circuit and pick-up circuit are the circuit structure of traditional inductive energy transmission system, the technology comparative maturity.DC power supply is converted into the high frequency alternating current through high-frequency inverter, alternating current is changed to the high-frequency resonant electric current behind the shunt-resonant circuit through primary resonant electric capacity and excitation coil composition, this high-frequency resonant electric current then can generate the induced field of high frequency alternation during by excitation coil on the plane of excitation coil, magnetic field coupling between excitation coil and the pick-up winding, on pick-up winding, produce induced electromotive force, promptly can be load by power conditioning circuitry energy is provided.
Pulsed magnetic field generation circuit described in the system and radiating circuit use same DC power supply Vcc, reduce equipment cost, and also can adopt two independent power supplys is system's power supply.When system moves, open first mains switch earlier, turn-off the second source switch, pulsed magnetic field generation circuit is started working, transmitting coil produces dither magnetic field, the coil of adjusting will drive pick-up winding deflection, make pick-up winding plane and excitation coil plane parallel, and promptly the pick-up winding plane is vertical with the induced field magnetic line of force; Then turn-off first mains switch, open the second source switch, radiating circuit is started working, and excitation coil produces high-frequency induction magnetic field, and pick-up winding produces induced electromotive force, for load provides energy, has realized the inductive power transmission.
Remarkable result of the present invention is: system has the automatic track and localization function in magnetic line of force orientation, the space flexibility of mechanism for picking is higher, guaranteed that the ceiling capacity in the inductive power transfer system picks up and transmit, the circuit theory that realizes is simple, control is convenient, cost is also cheaper, has very application prospects.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is an operation principle schematic diagram of the present invention;
Fig. 3 is the coil force analysis figure that adjusts.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 1, a kind of inductive electric energy transmission system with position self-setting function, comprise radiating circuit 1, pick-up circuit 2, pulsed magnetic field generation circuit 3 and the orientation circuit 4 of adjusting, described radiating circuit 1 is made up of DC power supply Vcc, high-frequency inverter 6, primary resonant capacitor C p and excitation coil Lp, and described pick-up circuit 2 is made up of pick-up winding Ls, secondary resonance capacitor C s, power conditioning circuitry 7 and load RL.Described excitation coil Lp produces induced field B, generates induced electromotive force on pick-up winding Ls, realizes the induction electric energy transmission of radiating circuit 1 to pick-up circuit 2.
Be provided with transmitting coil L1 in the described pulsed magnetic field generation circuit 3, this transmitting coil L1 and described excitation coil Lp coiling are at grade, adjust and be provided with the coil L2 that adjusts in the circuit 4 in described orientation, this adjusts coil L2 and described pick-up winding Ls coiling at grade.
The magnetic line of force direction that as Fig. 2, shown in 3, described pulsed magnetic field generation circuit 3 generates the magnetic field B of adjusting ', this magnetic field B of adjusting ' is identical with the direction of the induced field B of described excitation coil Lp generation.Find by the Ampere theorem analysis, adjust coil L2 in the magnetic field B of adjusting ' in can produce electromagnetic force Fad and Fbc, force analysis can get, the plane of coil L2 is not in the magnetic field B of adjusting if adjust ' on the normal direction of the magnetic line of force, can impel coil to rotate after the electromagnetic force on the coil L2 of then adjusting is synthetic around central rotating shaft, have only the plane and the magnetic field B of adjusting as the coil L2 that adjusts ' magnetic line of force when vertical, the coil L2 that adjusts could stress balance.Owing to be on the body of three-dimensional mechanism for picking, to increase the auxiliary coil L2 that adjusts, and adjust coil L2 and described pick-up winding Ls coiling at grade, so when adjusting coil L2 stress balance, described pick-up winding Ls plane also will be vertical with the magnetic line of force of induction magnetic field B, make the actual induction area maximum of pick-up winding Ls, guaranteed that maximum energy picks up and transmits.
In specific implementation process, the positive pole of described DC power supply Vcc is connected through the first input end of second source switch S 2 with described high-frequency inverter 6, the negative pole of this DC power supply Vcc is connected on second input of high-frequency inverter 6, connect described primary resonant capacitor C p between two outputs of described high-frequency inverter 6, at the two ends of primary resonant capacitor C p and meet described excitation coil Lp;
Connect described secondary resonance capacitor C s between two inputs of described power conditioning circuitry 7, this secondary resonance capacitor C s two ends described pick-up winding Ls in parallel connects described load RL between two outputs of power conditioning circuitry 7.
Be provided with impulse circuit 5 in the described pulsed magnetic field generation circuit 3, be connected with the positive terminal of described DC power supply Vcc behind the first input end string first mains switch S1 of this impulse circuit 5, the negative pole end of this DC power supply Vcc connects second input of described impulse circuit 5, the described transmitting coil L1 of serial connection between two outputs of described impulse circuit 5.
Be connected with the positive terminal of rectifier diode VD behind the described coil L2 one end serial connection current-limiting resistance R that adjusts, the negative pole end of this rectifier diode VD is connected on the other end of this coil L2 that adjusts.
Described impulse circuit 5, high-frequency inverter 6 and power conditioning circuitry 7 all are the mature technologies in the present technique field, and person skilled all can be implemented, and is not repeated at this.
Operation principle of the present invention is:
Work schedule by the first mains switch S1 and second source switch S 2 control impuls circuit 5 and high-frequency inverter 6.In specific embodiment, open the first mains switch S1 earlier, turn-off second source switch S 2, impulse circuit 5 is started working, transmitting coil L1 produces high-frequency impulse magnetic field, the coil L2 that adjusts is in this high-frequency impulse magnetic field, the electromagnetic force that produces on the coil will drive pick-up winding Ls deflection together, by force analysis as can be known, adjust the coil L2 plane and the magnetic field B of adjusting ' the stressed balance that just the reaches when magnetic line of force is vertical on the coil, promptly pick-up winding Ls plane stability is on the magnetic line of force normal direction of induced field B.
After adjusting and finish in the orientation, open second source switch S 2 again, turn-off the first mains switch S1, high-frequency inverter 6 is started working, excitation coil Lp produces induced field B, because pick-up winding Ls is stabilized on the magnetic line of force normal direction of induced field B, make the actual induction area maximum of pick-up winding Ls, guaranteed that finally maximum energy picks up and transmits.
Although above circuit structure is described the preferred embodiment of the present invention in conjunction with the accompanying drawings; but invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic rather than determinate; those of ordinary skill in the art is under enlightenment of the present invention; under the prerequisite of aim of the present invention and claim; can make multiple similar expression; quantity such as the change coil; transmitting coil L1 and excitation coil Lp are realized with same coil; perhaps the pick-up winding Ls and the coil L2 that adjusts are realized with same coil; though the design of coil is difficult, such conversion all falls within the protection range of the present invention.
Claims (4)
1. inductive electric energy transmission system with position self-setting function, comprise radiating circuit (1) and pick-up circuit (2), described radiating circuit (1) is made up of DC power supply Vcc, high-frequency inverter (6), primary resonant electric capacity (Cp) and excitation coil (Lp), and described pick-up circuit (2) is made up of pick-up winding (Ls), secondary resonance electric capacity (Cs), power conditioning circuitry (7) and load (RL);
It is characterized in that: also comprise pulsed magnetic field generation circuit (3) and the orientation circuit (4) of adjusting, be provided with transmitting coil (L1) in the described pulsed magnetic field generation circuit (3), this transmitting coil (L1) and described excitation coil (Lp) coiling are at grade, adjust and be provided with the coil of adjusting (L2) in the circuit (4) in described orientation, this coil of adjusting (L2) and described pick-up winding (Ls) coiling are at grade.
2. the inductive electric energy transmission system with position self-setting function according to claim 1, it is characterized in that: be provided with impulse circuit (5) in the described pulsed magnetic field generation circuit (3), first input end string first mains switch (S1) back of this impulse circuit (5) is connected with the positive terminal of described DC power supply Vcc, the negative pole end of this DC power supply Vcc connects second input of described impulse circuit (5), serial connection described transmitting coil (L1) between two outputs of described impulse circuit (5).
3. the inductive electric energy transmission system with position self-setting function according to claim 1, it is characterized in that: the described coil of adjusting (L2) end serial connection current-limiting resistance (R) back is connected with the positive terminal of rectifier diode (VD), and the negative pole end of this rectifier diode (VD) is connected on the other end of this coil of adjusting (L2).
4. the inductive electric energy transmission system with position self-setting function according to claim 1, it is characterized in that: the positive pole of described DC power supply Vcc is connected through the first input end of second source switch (S2) with described high-frequency inverter (6), the negative pole of this DC power supply Vcc is connected on second input of high-frequency inverter (6), connect described primary resonant electric capacity (Cp) between two outputs of described high-frequency inverter (6), at the two ends of primary resonant electric capacity (Cp) and connect described excitation coil (Lp);
Connect described secondary resonance electric capacity (Cs) between two inputs of described power conditioning circuitry (7), these secondary resonance electric capacity (Cs) two ends described pick-up winding (Ls) in parallel connects described load (RL) between two outputs of power conditioning circuitry (7).
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| CN2010102419952A CN101902083B (en) | 2010-07-30 | 2010-07-30 | Inductive power transmission system with position self-setting function |
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| CN2010102419952A CN101902083B (en) | 2010-07-30 | 2010-07-30 | Inductive power transmission system with position self-setting function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005829A (en) * | 2010-12-03 | 2011-04-06 | 重庆大学 | Magnetic field tracking servo mechanism for wireless electric power transmission system |
| CN107210125A (en) * | 2015-02-13 | 2017-09-26 | 鲍尔拜普罗克西有限公司 | Inductive power receiver |
| US10355532B2 (en) | 2016-11-02 | 2019-07-16 | Apple Inc. | Inductive power transfer |
| CN110244129A (en) * | 2019-07-09 | 2019-09-17 | 南京林业大学 | A kind of induction conductivity sensor reaction type controlled stimulus magnetic field generator |
| US10447090B1 (en) | 2016-11-17 | 2019-10-15 | Apple Inc. | Inductive power receiver |
| US10608470B2 (en) | 2012-10-29 | 2020-03-31 | Apple Inc. | Receiver for an inductive power transfer system and a method for controlling the receiver |
| US10923953B2 (en) | 2014-11-05 | 2021-02-16 | Apple Inc. | Received wireless power regulation |
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| CN201742174U (en) * | 2010-07-30 | 2011-02-09 | 重庆大学 | Inductive power transmission device with automatic azimuth setting function |
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2010
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| CN1194444A (en) * | 1997-03-26 | 1998-09-30 | 松下电工株式会社 | Non-contact type power transfer device |
| US7271569B2 (en) * | 2004-09-21 | 2007-09-18 | Motorola Inc. | Contact less charger with alignment indicator |
| CN101431258A (en) * | 2007-05-28 | 2009-05-13 | 索尼爱立信移动通信日本株式会社 | Power transferring coil unit, mobile terminal, power transmitting apparatus, and power transferring system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005829A (en) * | 2010-12-03 | 2011-04-06 | 重庆大学 | Magnetic field tracking servo mechanism for wireless electric power transmission system |
| CN102005829B (en) * | 2010-12-03 | 2012-07-25 | 重庆大学 | Magnetic field tracking servo mechanism for wireless electric power transmission system |
| US10608470B2 (en) | 2012-10-29 | 2020-03-31 | Apple Inc. | Receiver for an inductive power transfer system and a method for controlling the receiver |
| US10923953B2 (en) | 2014-11-05 | 2021-02-16 | Apple Inc. | Received wireless power regulation |
| CN107210125A (en) * | 2015-02-13 | 2017-09-26 | 鲍尔拜普罗克西有限公司 | Inductive power receiver |
| US10355532B2 (en) | 2016-11-02 | 2019-07-16 | Apple Inc. | Inductive power transfer |
| US10447090B1 (en) | 2016-11-17 | 2019-10-15 | Apple Inc. | Inductive power receiver |
| CN110244129A (en) * | 2019-07-09 | 2019-09-17 | 南京林业大学 | A kind of induction conductivity sensor reaction type controlled stimulus magnetic field generator |
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| CN101902083B (en) | 2012-08-22 |
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