WO2019063270A1

WO2019063270A1 - Adapter apparatus for an inductive charging arrangement having at least two coils, and method

Info

Publication number: WO2019063270A1
Application number: PCT/EP2018/074252
Authority: WO
Inventors: Robert Obermaier; Ewald Altmann; Ulrich Stetter
Original assignee: Continental Automotive Gmbh
Priority date: 2017-09-27
Filing date: 2018-09-10
Publication date: 2019-04-04
Also published as: DE102017217198A1

Abstract

The invention relates to an adapter apparatus (13) for an inductive charging arrangement having two coils (2, 3) or two coil arrays. The invention makes provision for the adapter apparatus (13) to be configured as an intermediate element for arrangement between the coils (2, 3) or coil arrays of the charging arrangement (1) and to be designed to receive a first magnetic flux (5), which changes over time, from a first of the coils (2, 3) or coil arrays and to output a second magnetic flux (5), which changes over time, to the second of the coils (2, 3) or coil arrays by means of the received first magnetic flux (5), wherein, in the adapter apparatus (13), a total surface area (19) for receiving the first magnetic flux (5) and a total surface area (21) for outputting the second magnetic flux (22) are of different sizes.

Description

description

Adapter device for at least two coils having inductive charging arrangement and method.

The invention relates to an adapter device for an inductive charging arrangement having at least two coils and to a method for operating the adapter device. Wireless charging of devices is usually based on elekt ^¬ romagnetischer induction, which is also known as inductive coupling. In this case of a coil or an arrangement of several coils (also known as "coil array") of a charging ^¬ device generates a time varying magnetic flux which penetrates a coil or an arrangement of several coils of a receiver device, thereby inducing an electric current. For simplification The description is given for the case of individual coils, which is however analogous to said coil arrays.The arrangement of charging device and receiver device is referred to herein as charging device A maximum transmission power between the charging device and the receiver device is achieved when the inductive coupling between the coil of the charging device A maximum inductive coupling between both coils is present when a magnetic flux generated by the first coil passes completely through the second coil, so there is no stray magnetic flux s in the arrangement there. The inductive coupling depends on the particular ^¬ from the relative sizes and positioning of the surfaces of the two coils. Whose size differs from one another or both coils are not arranged congruently one behind the other, the magnetic flux leakage increases and from the La ^¬ deleistung. This problem occurs when a receiver device has, due to its dimensions, a coil with a smaller area than that of the coil of the charging device. This may be the case if small radio transmitters, electronic pendants or ^

Wrist watches are charged with a charging device for mobile phones. As a result, a maximum charging power during the charging process can not be achieved. In addition, some charging technologies require minimal coupling between the charging device and the receiver device to initiate a charging process.

It is an object of the invention to provide a possibility determine ready ^¬ which enables a receiver device and a charging device to combine different induction systems.

According to the invention an adapter device for a two coils or two coil arrays having inductive charging area ^¬ order is provided. To simplify the description, only the case of individual coils will be described below, which, however, applies analogously to said coil arrays. Each named coil of the charging arrangement in this case represents a coil array. One of the coils may belong to a charging device, the other to a receiver device. The adapter device is designed as an intermediate element for arranging between the coils of the charging arrangement. It is adapted to receive a first time-varying magnetic flux from a first of the coils of the charging arrangement and to emit a second time-varying magnetic flux to the second of the coils of the charging arrangement by means of the received first magnetic flux. In this case, in the adapter device, a first total area for receiving the first magnetic flux and a second total area for outputting the second magnetic flux have different sizes.

In other words, the adapter device is a device which is designed to be arranged between a first coil and a second coil. The adapter device is configured to receive the time-varying first magnetic flux of the first coil of the charging device and to deliver the second time-varying magnetic flux to a second coil of the charging device, the second one time-varying magnetic flux is generated by means of the first time-varying magnetic flux. In this case, a first total area of the adapter device, which is flowed through by the first magnetic flux, has a different size than a second total area of the adapter device, which is flowed through by the second magnetic flux.

By the adapter device there is the advantage that a magnetic leakage flux between two coils is reduced.

Thus, for example, it is possible for the adapter device to be arranged to be arranged in a charging arrangement between a charging device and a receiver device, wherein the charging device generates a time-varying first magnetic flux by means of a first coil, which coil is surrounded by a first coil Surface bundled runs. The receiver device may include the second coil enclosing an area smaller than the area enclosed by the first coil. As a result, not all the first magnetic flux would pass through the second coil if the two coils of the charging assembly were placed one on top of the other. Thus, the inductive coupling of both coils would be reduced. By arranging the adapter device between the first coil and the second coil of the first magnetic flux can be received from the adapter device through the first Ge ^¬ total surface area for receiving the first magnetic flux. The first total area for receiving the first magnetic flux may be sized to coincide with the area enclosed by the first coil or the first coil array, or may differ by at most 30%. By means of the received first magnetic flux, the adapter device may generate the second magnetic flux passing through the second total area for outputting the second magnetic flux. The total area for outputting the flux may be sized to coincide with the area enclosed by the second coil or the second coil array, or may differ by at most 30%. In summary, the Adapter device receives the first magnetic flux over the first total area dimensioned with respect to the first coil, and outputs the second magnetic flux over the second total area dimensioned relative to a second coil, thereby creating a leakage magnetic flux between the first and the second coil is reduced.

A development of the invention provides that the first total area for receiving the first magnetic flux is greater by a factor F than the second total area for outputting the second magnetic flux, wherein the factor F is at least 1.5. In other words, the first base area for receiving the first magnetic flux is at least 1.5 times larger than the second total area for outputting the second magnetic flux. This has the advantage that the first magnetic flux can be concentrated on an area which is significantly smaller than the first total area. For example, it is possible for the first of the total areas to be ten times the area compared to the second of the total areas of the adapter device.

A development of the invention provides that the adapter device comprises at least one magnetic material core element, wherein the magnetic material core element has a shape tapering from a base surface to a cover surface. In this case, the base area of the magnetic material core element preferably coincides with one of the two total areas or differs by at most 30% from it. The top surface of the magnetic material-nuclear elements is consistent with the other of the two Ge ^¬ samtflächen preferred or differs by at most 30% of this. As the magnetic material, a material may be selected which has a relative magnetic permeability over 100 μο and a magnetic coercive field strength below 1000 A / m, in particular below 100 A / m, and preferably We ^¬ belstromverluste due to an electrical conductivity, which is below a predetermined value , avoids. The value is in particular less than 10 ⁶ S / m, preferably less than 10 ⁵ S / m. It may be, for example, a ferrite, such as nickel-zinc ferrite (NiZn) or manganese-zinc ferrite (MnZn). The term also includes materials which, due to their phase, structure or structure, have the said properties. Thus, the term "magnetic material" also includes a powder or a lamellar structure, in other words, the adapter device comprises a magnetic material core element whose volume is delimited at one end by the base and which is bounded at one end by the top surface one of the two overall surfaces coincides and the top surface coincides with one of the two overall surfaces

Base area and the top surface. This has the advantage that the received magnetic flux to a surface can be kon ^¬ centered, or the magnetic flux density can be increased. It may be that the base surface of the magnet ^¬ material ^core element coincides with the surface of the first total area and the top surface with the surface of the second total area, wherein a cross-sectional area decreases from the base surface to the top surface. The embodiment does not require its own circuit. The magnetic material core element acts as

River lens. A development of the invention provides that the magnetic material core element has a shape of a truncated cone or a truncated pyramid. What is meant here both the ro ^¬ tationssymmetrische and the sheared variant. In other words, the base surface and the top surface of the magnetic material core element have a circular or rounded or polygonal shape. This results in the advantage that the first magnetic flux is concentrated by means of a standard volume on the second magnetic flux. It can be provided that both the base surface and the top surface are circular surfaces or polygonal surfaces.

A further development of the invention provides that the adapter device is a magnetic material return element. directed to return the magnetic flux from the second coil to the first coil. In other words, the adapter device comprises a magnetic material return element, which bundles the flux after it has flowed through the second coil and leads back to the first coil. This results in the

Advantage that the dispersion of the retrograde magnetic flux is reduced. By reducing the air gap for the return path, the coupling and the strength of the magnetic flux increase. It can be provided that the magnetic material return element is arranged in such a way that a magnetic flux is bundled over the respective magnetic material plates and the magnetic material return element.

A development of the invention provides that the magnetic material return element is designed as a magnetic material shell. In other words, the magnetic material return element is designed as a shell, cylinder jacket or in general as a volume, which is arranged on edge surfaces of the adapter device between the base surfaces. This results in the advantage that the interior of the adapter device is shielded from the retrograde flow.

A development of the invention provides that the adapter device has at least one receiving coil and at least one transmitting coil, wherein the at least one receiving coil limits or provides the first total area for receiving the first magnetic flux, and the at least one transmitting coil the second total area for outputting the second magnetic field River limited or ready. In other words, the adapter device comprises at least one receiver coil which covers the first total area for receiving the first magnetic flux. The adapter device also comprises a transmitter coil, which covers the second total area to output the second may ^¬ netic flux. This results in the advantage that in the at least one receiving coil, an electric current can be induced, whereby it is possible to provide energy for the adapter device and / or the second magnetic flux by means of at least one transmitting coil produce. It is for example possible that the receiving coil of the adapter device is optimized or adapted with respect to their number of turns and their area on the first coil of the charging arrangement and thus an inductive coupling between two coils whose efficiency is above a predetermined

Threshold is. Of in the receiving coil, the adapter device ^¬ induced by the first magnetic flux flow of the transmitting coil, the adapter device can be supplied, whereby the second magnetic flux in the second coil of the charging assembly can be produced by this. The transmitting coil can be dimensioned so that it allows an efficient inductive coupling with the second coil of the charging arrangement.

A development of the invention provides that despule at the transmitter and the receiver coil a respective magnetic material ^¬ material plate is arranged, wherein the magnetic material plate is arranged in each case such that a respective coil flows through only one of the two magnetic fluxes. In other words, a respective magnetic material plate is arranged on the receiving coil and the transmitting coil. The magnetic material ^¬ panels are preferably arranged between the coils of the adapter device. The arrangement of the respective magnetic material plate is chosen so that it is located on the side which faces away from the next of the two coils of the charging arrangement. Thus, the respective magnetic flux is guided so that it does not penetrate the other coil. This has the advantage that parasitic inductions can be avoided. It can be provided, for example, that a front side of the receiving coil is aligned in the direction of the first coil of the charging arrangement, whereby the first magnetic flux penetrates the coil, and the back of the receiving coil is covered by a magnetic material plate, whereby the first magnetic flux on the back the coil is bundled and returned laterally by the magnetic material plate. This can prevent the first magnetic flux from passing through and inducing current in the transmitting coil. ₀

O

A development of the invention provides that the adapter device comprises an adapter electronics which is set up to use different communication protocols for the respective coordination of a transmission process for the respective magnetic flux on the two overall surfaces. In other words, the adapter device includes an adapter electronics that can communicate over different commu ^¬ nikationsprotokolle over the magnetic fluxes with a charging electronics and / or receiver electronics. This allows the adapter electronics coordinate a transmission process for the respective magnetic flux. This results in the advantage that the adapter device allows coordination between different communication protocols. The adapter electronics may, for example, be adapted to detect and decode data which has been emitted by means of a modulation of the first magnetic flux from the first coil. The adapter electronics may comprise, for example, a capacitor for buffering the electrical energy, a transistor for switching and a chip for encoding or decoding the data. The data may be encoded by the adapter electronics according to another communication protocol and sent out to the second coil by the transmit coil via the second magnetic flux.

A further development of the invention provides that the adapter electronics is set up to store electrical energy from the received magnetic flux and, with the intermediately stored electrical energy, to store the second magnetic flux having a different frequency than a frequency of the first magnetic flux by switching a second magnetic flux generate electricity. In other words, the adapter electronics are set up to generate the second magnetic flux to be emitted by means of the electrical energy received from the first magnetic flux. This is done by switching an electrical current which is switched so that the frequency of the second magnetic flux to be emitted deviates from the frequency of the received first magnetic flux. This results in the advantage that a charging process between systems which use a different frequency of use is made possible. The adapter electronics can be configured, for example, as a converter. By means of the received first magnetic flux, an electrical current can be induced in the receiving coil, which can be supplied to the adapter electronics. The electrical energy of the induced current may be used by the adapter electronics to provide a transmit current to the transmit coil. This transmission current may be such that the second magnetic flux has a different frequency than the first magnetic flux.

A development of the invention provides that the adapter device has a storage profile for depositing a device, wherein one of the total surfaces is provided in the storage profile. In other words, the adapter device comprises a storage profile, which is adapted to allow a placement of a device in a predetermined position, wherein the storage profile is designed such that the respective coil of the charging arrangement is arranged with respect to a total area. This results in the advantage that a device to be charged can be arranged for maximum power transmission. The storage profile can be designed for example as a trough or shell, which is located on the adapter housing. The storage profile can be dimensioned so that a coil of the

Charging arrangement with respect to one of the magnetic fields, which flows through one of the total surfaces, is arranged such that a maximum inductive coupling is made possible. A development of the invention provides that the adapter device has a support profile for aligned laying of the adapter device on a loading device wherein one of the total surfaces is provided in the support profile. In other words, the adapter device comprises a support profile which is adapted to allow depositing the Adaptervor ^¬ direction on a loading device in a predetermined position, wherein the support profile is such ge ^¬ staltet that the respective coil of the charging assembly against a total area is arranged. This has the advantage that the adapter device can be arranged for maximum Leis ^¬ tung transfer to a charging device. The support profile may for example be designed as a trough or shell, which is located on the adapter housing. The support profile can be dimensioned such that a coil of the La ^¬ Deanordnung with respect to one of the magnetic fields, which flows through one of the total surfaces, is arranged such that a maximum inductive coupling is possible.

A development of the invention provides that the adapter device is set up to carry out charging operations with a power of up to 20 W. The invention also includes a method for operating an adapter device for a two-coil inductive charging device. It is provided that a first time-varying magnetic flux from a first of the coils is received by an adapter device designed as an intermediate element for arranging between the coils of the charging device. By means of the received first magnetic flux from the adapter device, a second time-varying magnetic flux is delivered to the second of the coils. In this case, in the adapter device, a total area for receiving the first magnetic flux and a total area for outputting the second magnetic flux are different in size.

The invention also includes developments of the method according to the invention, which have features as they have already been described in connection with the developments of the adapter device according to the invention. For this reason, the corresponding developments of the method according to the invention are not described again here. The following is an embodiment of the invention be ^{¬ written} . This shows: 1 shows a charging arrangement comprising a first and a second coil.

2 is a schematic representation of an adapter device comprising two magnetic material elements

3 shows an adapter device comprising two magnetic material elements; 4 shows a schematic representation of an adapter device comprising a receiver coil and a transmitter coil; and

5 shows an adapter device, comprising a receiver coil and a transmitter coil.

The exemplary embodiment explained below is a preferred embodiment of the invention. In the exemplary embodiment, the described components of the embodiment each represent individual features of the invention that are to be considered independently of one another, which also each independently further develop the invention and thus also individually or in a different combination than the one shown as part of the invention. Furthermore, the described embodiment can also be supplemented by further features of the invention already described.

In the figures, functionally identical elements are each provided with the same reference numerals. 1 shows a charging arrangement 1 comprising a first coil 2 and a second coil 3. The coils 2, 3 may be, for example, flat coils which differ in their area and / or shape from one another. In this case, the first coil 2 may be a coil of a charging device 4, which is set up to generate a first magnetic flux 5. The first coil 2 can be electrically connected to a charging electronics 6. The charging electronics 6 can conduct an electric current in the first coil 2, whereby the first magnetic Flow 5 is induced. Before the first coil 2, a second coil 3 may be arranged. The second coil 3 may surround a smaller area 10 than the first coil 9. The second coil 3 may be electrically connected to a receiver electronics 7. A part of the first magnetic flux 2 may penetrate the surface of the second coil 10. The remaining part of the first magnetic flux 5 may extend outside the area of the second coil 3 as leakage flux 8. The first magnetic flux 5 may be temporally variable. In particular, it may be an oscillating magnetic flux. By the part of the first magnetic flux 5, which penetrates the surface of the first coil 9, an electric current 11 can be induced, which supplies the receiver electronics 7 with electrical energy 12. Due to the fact that the areas 9,10 of the coils 2, 3 differ in their dimensions, it is not possible to direct the entire first magnetic flux 5 through the second coil 3, whereby the charging power is limited. Due to the low coupling and the communication between the charging electronics 6 and the receiver electronics 7 may be limited, so that it may happen depending on the communication protocol of communication that no energy transfer is started or no Energieübertra ^¬ tion, which exceeds a predetermined value , The communication can take place, for example, via a load modulation on the second coil 3, which can be imaged via the coupling in the first coil 2.

2 shows a schematic representation of an adapter device adapter device comprising two magnetic material elements 14, 15. FIG. 2 shows the charging arrangement 1 already described in FIG. 1, wherein the first magnetic flux 5 is influenced or guided by means of the two magnetic material elements 14, 15. A first magnetic material element is a magnetic material core element 14, which is located between a receiving coil 16 and a transmitting coil 17. The Mag ^¬ netwerkstoffkernelement 14 may have a tapered shape, which is that, for example, with a total area for receiving the first by a base 18, magnetic flux 19 coincides with a top surface 20, which coincides with a total area for outputting a second magnetic flux 21, tapers. In this case, the magnetic material core element 14 may have the shape of a truncated cone or a truncated pyramid. The magnetic material core element 14 may consist of a soft magnetic material which, for example, has a coercive field strength of less than 100 A / m. The magnetic material core member 14 may be ferromagnetic or ferrimagnetic and thus have a high magnetic permeability, whereby the first may ^¬ genetic flow is condensed in it. 5 The first magnetic flux 5 may penetrate the base surface 18 of the magnetic material core element 14 and flow through the magnetic material core element 14 until it leaves the top surface 20 bundled as a second magnetic flux 22. By focusing on a top surface 20, which is adapted to the surface of the second coil 10 of the arrangement, it is achieved that a larger proportion of the first magnetic flux 5 flows through the second coil 2. Thus, the inductive coupling between both coils 2,3 is increased. In order that also the returning magnetic flux 23, ie the magnetic flux which has flowed through the surface of the second magnetic coil 10, can be supplied in bundled form to the first coil 2, it may be that a magnetic material return element 15 bundles the returning magnetic flux 23.

Fig. 3 shows an adapter device 13, which works according to the concept described in Fig. 2. The adapter device 13 is arranged between a first coil 2 and a second coil 3. The first coil 2 is a coil of a charging process ^¬ direction 4 which is adapted to charge a 24 Empfängervor ^¬ direction by means of an inductive charging process. The charging device 4 may include a charging electronics 6, which is connected to the first coil 2 via an electrical line 25. The charging electronics 6 can provide a current which causes the first magnetic flux 5 in the first coil 2. The first magnetic flux 5 generated by the first coil 2 may be bundled by the surface of the first coil 9 are lost. The surface which is on the other side of the coil may be covered by a magnetic material plate 26. As a result, the retrograde magnetic flux 23 can be bundled back into the first coil 2. The second coil 3 may belong to a receiver device 24 and another surface

10 as the first coil 9 have. Behind the second coil 3, a magnetic material plate 26 can also be arranged in order to be able to concentrate a retrograde magnetic flux 23. The second coil 3 may be electrically connected to a receiver electronics 7. The adapter device 13 may be arranged between the charging device 4 and the receiver device 24. The arrangement may be oriented so that the total area for receiving the first magnetic flux 19 is arranged congruently over the surface of the first coil 9. The total area for receiving the first magnetic flux 19 may preferably be identical or differ from the base area 18 of the magnetic material core element 14 in its dimensions by at most 30%. A total area for discharging the second magnetic flux 21 may preferably be identical to the top surface 20 of the magnetic material core element 14 or may differ from it by at most 30% and be arranged congruently below the surface of the second coil 10. Due to the concentration of magnetic flux on a smaller area, a magnetic flux can be generated

The flux density of the first magnetic flux 27 may be less than a flux density of the second magnetic flux 28. In order to allow a predetermined positioning of the surface of the second coil 10 above the top surface 20, the housing of the adapter device 29 may have a shelf profile 30 into which the receiver device 24 can be positioned, wherein the total area for discharging the second magnetic flux 21 and the surface of the second coil 10 are preferably congruent to each other, whereby an optimal magnetic coupling is made possible. The storage profile 30 may have a shape which causes the magnetic material plate 26 behind the second coil 3 has a predetermined position with respect to the magnetic material return element 15, whereby an optimal return of the returning magnetic flux 23rd is possible. The magnetic material return element 15 may be adapted to the shape of the receiver device 24 with the smallest possible distance to the magnetic material plate 26 and located on the inside of the housing of the adapter device 29. The adapter device may comprise a support profile 31 which is adapted to the shape of the loading device 4. It is for example possible that the shape of the support profile 31 is adapted to the charging device 4, that the surface of the first coil 9 is arranged opposite to the total surface for receiving the first magnetic flux 19.

4 shows a schematic representation of a further embodiment of the adapter device 13. Shown are the said coils 2, 3 of the charging arrangement 1, wherein an adapter device 13 according to the invention is arranged between the coils 2, 3. The adapter device 13 may have a receiving coil 16, the surface 32 of which may be arranged as congruently as possible over the surface of the first coil 9 of the charging arrangement 1. The adapter device may comprise a transmitting coil 17, the surface 33 of which may be arranged as congruent as possible with respect to the surface of the second coil 10 of the charging arrangement 1. The two coils 16, 17 of the adapter device 13 may be connected to each other by an electrical line 25. In this case, an adapter electronics 34 may be connected between the two coils 16,17. If the charging device 4 generates a time-varying first magnetic flux 5, it can penetrate the surface of the receiving coil 32 of the adapter device and induce an electric current 11. This current 11 can be supplied to the transmitting coil 17 via an electrical line 25, whereby a second magnetic flux 22 can be generated by the transmitting coil 17. The second magnetic flux 22 may pass through the surface of the second coil 10 of the receiver device 24, whereby an electric current 11 may be induced therein. If a direct forwarding of the current 11 induced in the receiver coil 16 to the transmitter coil 17 occurs without the current 11 being changed in frequency, for example, then this is a passive adapter device. It may be that an alternating frequency of the first magnetic Flow 5 deviates from a predetermined frequency of the second coil 3. It may be that the induced current in the receiving coil 16 11 is adjusted by means of the adapter electronics 34 by the frequency of the induced current 11 is changed so that by the transmitter coil 17 of the second magnetic flux 22 is generated with the necessary frequency. It may also be that the charging device 4 and the receiver apparatus 24 are adapted to be modulated by the magnetic fluxes 5.22 to com municate ^¬ by this switch, for example by coded supply a load. This may be necessary, for example, to initiate a charging process, regulated by the charging electronics 6. In this case, the standard of the communication of the charging device 4 and the receiver device 24 may differ, so that a communication between the two devices is not directly possible. The

Adapter electronics 34 can be set up in such a way that they enable communication between a charging device 4 and a receiver device 24 by correspondingly converting the current 11. Magnetic material plates 26 may be arranged on the sides of the coils 16, 17 of the adapter device 13 facing away from the overall surfaces 19, 21 in order to channel the second magnetic flux 22 and to reduce stray fields. Fig. 5 shows an adapter device 13, comprising a Emp ^¬ fang coil 16 and a transmission coil 17, which operates according to the process described in Fig. 4 concept. The adapter device 13 comprises a receiving coil 16 and a transmitting coil 17, which are aligned opposite two coils 2, 3 of the charging arrangement 1. The coils 2, 3 of the charging arrangement and the coils 16, 17 of the adapter device 13 are covered by magnetic material plates 26 on the respectively opposite side. The receiver coil 16 may be connected via an electrical line 25 to the adapter electronics 34 so that the current induced in the receiver coil 16 11 of the adapter electronics 34 can be fed. The adapter electronics 34 can direct electrical energy 12 buffers and a transmission current 11 to the transmitting coil 17, whereby the second magnetic flux 22 can be generated. The Transmission current 11 may be adjusted by the adapter electronics 34 so that the alternating frequency of the second magnetic flux 22 differs from the frequency of the first magnetic flux 5. The frequency of the second magnetic flux 22 may coincide with a transmission frequency of the receiver device 24.

Overall, the example shows how a charging adapter can be provided by the invention.

Reference sign list

1 charging arrangement

2 first coil

3 second coil

4 charging device

5 first magnetic flux

6 charging electronics

7 receiver electronics

8 leakage flux

9 area of the first coil

10 area of the second coil

11 electricity

12 electrical energy

13 adapter device

14 Magnetic material core element

15 magnetic material return element

16 receiver coil

17 transmission coil

18 base area

19 total area for receiving the first magnetic

river

20 deck area

21 total area for outputting the second magnetic

river

22 second magnetic flux

23 returning magnetic flux

24 receiver device

25 electrical line

26 magnetic material plate

27 flux density of the first magnetic flux

28 Second magnetic flux flux density 29 Housing of the adapter device

30 storage profile

31 support profile

32 area of the receiver coil

33 surface of the transmitting coil

34 adapter electronics

Claims

claims

1. Adapter device (13) for a two coil (2,3) or two coil arrays inductive charging arrangement,

characterized in that the Adap ^¬ tervorrichtung (13) is designed as an intermediate element for mounting between the coils (2,3) or coil array of the charging arrangement (1) and is adapted to a time varying first magnetic flux (5) from a first of the coils (2, 3) or coil arrays and to deliver a time-varying second magnetic flux (5) to the second of the coils (2, 3) or coil arrays by means of the received first magnetic flux (5). 13), a total area (19) for receiving the first magnetic flux (5) and a total area (21) for outputting the second magnetic flux (22) are different in size.

2. Adapter device (13) according to claim 1, characterized in that the total area for receiving (19) of the first magnetic flux (5) by a factor F is greater than the total area for outputting (21) of the flow, wherein the factor F is at least 1.5.

3. Adapter device (13) according to one of the preceding claims, characterized in that the

Adapter device (13) at least one Magnetwerkstoffkern- element (14), wherein the Magnetwerkstoffkernelement (14) has a shape of a truncated cone or a truncated pyramid or from a base surface (18) to a top surface (20) tapered shape.

4. Adapter device (13) according to claim 3, characterized in that the base surface (18) of Magnetwerkstoffkernelements (14) coincides with one of the two Gesamtflächen (19,21) or at most 30% different from this and the top surface (20 ) of the magnetic working material ^¬ core member (14) with the other of the two total areas (19,21) or differs from it by at most 30%.

5. The adapter device according to claim 1, wherein the adapter device has a magnetic material return element for returning a returning magnetic flux.

6. An adapter device (13) according to claim 5, characterized in that the magnetic material return ^¬ guiding element (15) comprises a magnetic material core shell / ^¬ is a magnetic material shell.

7. Adapter device (13) according to one of the preceding claims, characterized in that the adapter device (13) has at least one receiving coil (16) and at least one transmitting coil (17), wherein the at least one receiving coil (16) total the total area for receiving (19 providing) of the first magnetic flux (5) and the at least ^¬ a transmitting coil (17) the total area (21) for outputting the second magnetic flux (22) provides.

8. The adapter device (13) according to claim 7, characterized in that at least one of the at least one

The transmitting coil (17) and the at least one receiving coil (16) each have a magnetic material plate (26) disposed on the side away from the overall surface (19, 21), and the at least one transmitting coil (17) and the at least one receiving coil. Fangsspule (16) each in operation only by the magnetic flux (5,22) flows through one of the total surfaces (19,21).

9. Adapter device (13) according to any one of claims 7 or 8, characterized in that the adapter device (13) comprises an adapter electronics (34) which is adapted to receive electrical energy (12) of the at least one receiving coil (16) and to transmit to the at least one transmitting coil (17).

10. Adapter device (13) according to any one of claims 7 to 9, characterized in that the Adap ^¬ terelektronik (34) is adapted to the two total surfaces (19,21) different communication protocols for coordinating a respective transfer process for the respective magnetic flux ( 5,22).

11. Adapter device (13) according to any one of claims 7 to 10, characterized in that the adapter terelektronik (34) is adapted to intervene electrical energy (12) from the received first magnetic flux (5) and stored with the cached electrical Energy (12) to be emitted second magnetic flux (22) having a frequency other than a frequency of the received first magnetic flux (5) by switching a

electric current (11) to produce.

12. Adapter device (13) according to one of the preceding claims,

characterized in that the adapter ^¬ device (13) has a storage profile (30) for depositing a device, wherein one of the total surfaces (19,21) in the storage profile (30) is provided.

13. Adapter device (13) according to one of the preceding claims,

characterized in that the adapter ^¬ device (13) has a support profile (31) for aligned placement of the adapter device (13) on a loading device, wherein one of the total surfaces (30) in the support profile (31) is provided.

14. Adapter device (13) according to one of the preceding claims,

characterized in that the adapter ^¬ apparatus (13) is adapted to carry out charging operations with a power up to 20W.

15. A method for operating an adapter device (13) for an inductive charging arrangement having two coils (2, 3) or two coil arrays,

d a d u r c h e c e n c i n e s that

a first time-varying magnetic flux (5) received from a first of the coils (2,3) or coil arrays of an adapter device (13) designed as an intermediate element for arranging between the coils (2,3) or coil arrays of the charging device (1) will, and

by means of the received first magnetic flux (5) a second time-varying magnetic flux (22) will be delivered from the adapter device (13) to the second of the coils (2,3) or coil arrays,

wherein, in the adapter device (13), a total area for receiving (19) the first magnetic flux (5) and a total area for outputting (21) the second magnetic flux (22) are different in size.