DE10112892B4 - Device for transmitting data within a system for non-contact inductive energy transmission - Google Patents

Device for transmitting data within a system for non-contact inductive energy transmission

Info

Publication number
DE10112892B4
DE10112892B4 DE10112892A DE10112892A DE10112892B4 DE 10112892 B4 DE10112892 B4 DE 10112892B4 DE 10112892 A DE10112892 A DE 10112892A DE 10112892 A DE10112892 A DE 10112892A DE 10112892 B4 DE10112892 B4 DE 10112892B4
Authority
DE
Germany
Prior art keywords
data
transmission
characterized
device according
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE10112892A
Other languages
German (de)
Other versions
DE10112892A1 (en
Inventor
Günter Bühler
Rainer Freise
Jürgen MEINS
Christian Vollertsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Vahle GmbH and Co KG
Original Assignee
Paul Vahle GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Paul Vahle GmbH and Co KG filed Critical Paul Vahle GmbH and Co KG
Priority to DE10112892A priority Critical patent/DE10112892B4/en
Publication of DE10112892A1 publication Critical patent/DE10112892A1/en
Application granted granted Critical
Publication of DE10112892B4 publication Critical patent/DE10112892B4/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14Inductive couplings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00Circuit arrangements for transfer of electric power between ac networks and dc networks
    • H02J5/005Circuit arrangements for transfer of electric power between ac networks and dc networks with inductive power transfer
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines
    • H04B3/56Circuits for coupling, blocking, or by-passing of signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462Systems for power line communications
    • H04B2203/5483Systems for power line communications using coupling circuits

Abstract

contraption for transmission data within a non-contact inductive energy transfer system, wherein a primary current conductor (2, 7, 8, 27, 28, 31, 40, 51, 52) except for power transmission as well for transmission is used by data, the data being inductive in the primary conductor (2, 7, 8, 27, 28, 31, 40, 51, 52) are coupled in and out, and that return conductor or only one of these two conductors of the primary conductor (2, 7, 8, 27, 28, 31, 40, 51, 52) are used for coupling and decoupling the data, the data being transmitted simultaneously in multiple data channels via the primary conductor (2, 7, 8, 27, 28, 31 40, 51, 52) are transmitted by the signal states in these data channels two different frequencies (f1, f2) are assigned by it characterized in that the one frequency (f1) by means of a generator with subsequent transmission amplifier (83) and the other frequency (f2) by means of a generator and connected transmission amplifier (84) are generated, and that the ...

Description

  • The The present invention relates to a device for data transmission according to the preamble of claim 1, in particular for use in systems for the inductive energy transfer to mobile consumers.
  • at a known device of this type (WO 98/57413) takes place the Use of the primary manager both for the power transmission as well as for the data transmission. The energy transmission system exists this essentially from an AC power source, the AC into a primary conductor imprints, and one or more consumers moving along the primary conductor Move and inductive coupling the energy from the electromagnetic Disconnect the field of the primary conductor. In practice, the primary current has a frequency of about 20 KHz. The primary circuit includes a back and forth a return conductor, which each at its one end to the power source and are connected to each other at their other end. Of the Primary circuit can be used as a 1anggestreckte, substantially parallel conductor arrangement accomplished usually using the field of the return conductor for energy transfer becomes. The primary circuit But it can also be designed so that only the outgoing or returning conductor the direct energy extraction is used, the other one Conductor used only for current feedback becomes. This type of primary conductor loop So can get any shape. That of the current flowing through primary conductor generated magnetic field induced in the secondary winding of the pantograph a stream, which is then usually processed electronically and the supply of the mobile consumer (eg drive, Lighting, computer) can serve.
  • The Contactless inductive energy transfer system described here comes as Replacement for conductor lines and trailing cable for use. Its advantages are u. a. in the Electrical isolation and in that the driving speed of the moving Consumer independent from the power transmission is.
  • From the DE 196 49 682 A1 a device for non-contact inductive energy transmission is known, wherein a primary current conductor is used except for energy transmission and for the transmission of data. The data is inductively coupled into or out of the primary conductor.
  • From the DE 195 12 523 A1 is a transport element for conveying goods with elements for the drive and for tracking known. The transport element has a controllable transport unit, a storage and an input and output unit for goods and a data processing unit and an information transfer unit. The drive is a linear motor with passive stator in the track. The energy and information transmission is also contactless.
  • From the DE 195 40 854 A1 For example, a multi-point inductive coupler is known for transmitting alternating voltages and passive switching signals to and from an external operator device, to and from a main device.
  • From the DE 42 36 430 C1 is a switching stage in current switch technology is known, which includes a differential amplifier arrangement and at least two bipolar transistors which are connected in common emitter connection to an output of the differential amplifier arrangement.
  • at such energy transmission systems is often the transmission of data within the system desired, for. B. a moving consumer to control or have this data sent to a central station. Therefore, the known device of the type described above additionally a system for data transmission on, with transmission frequencies between 100 MHz and 1 GHz. The transfer of data takes place using the primary conductor, by making a coupling between this and the transmitter / receiver which is on the broadcast and the reception electromagnetic Waves by usual Antennas is based. This is the spatial arrangement of the primary conductor in reference to the base area or guide construction used, to which this is attached at a small distance. These mechanical guidance of the primary manager, which is often made of solid metal, due to its electrical Properties for conducting the radio waves are used by themselves the waves z. B. spread by reflection on the surface along the guide. Due to the high attenuation values occurring at high frequencies is the transmission data with this technique to relatively short lengths of the primary conductor loop limited.
  • Of the The invention is therefore based on the object, a data transmission within the device of the type described above to such enable, that existing structures are used without the advantages affecting the system, but that's the transmission the data too relatively large lengths the primary conductor loop possible is.
  • These Problem is solved by a device with the characteristics of Claim 1 solved.
  • The advantages achieved by the invention be stand, in particular, that the already existing primary conductor is also used directly for data transmission in addition to the energy transfer. The advantages of a high driving speed of the load while at the same time isolation are maintained.
  • For transmission of data Return conductor together or just one of the two conductors of the primary conductor to be used. The use of forward and return ladder offers itself at a close parallel route at. In a differently designed conductor loop u. U. only one Head are used, because the other z. B. from a massive sweeping structure, z. B. a metal structure is formed.
  • To Claim 2, the logic states of to be transferred digital data by the inductive coupling different Transfer frequencies into the primary conductor. For one binary data transmission have to So two frequencies, one for LOW and one for HIGH transmitted which essentially corresponds to a frequency modulation. The Frequencies need a sufficient distance to the fundamental frequency of the primary current exhibit in the receiver to be separated from this.
  • claim 3 describes that multiple data transfers can take place simultaneously. These are z. B. in binary streams or data channels 2 frequencies for transmission necessary.
  • claim 7 describes the possible use of the system in another environment, e.g. B. in water or in oil.
  • To Claim 10 are optionally frequency filter advantageous, the those frequency components of the primary current reduce that for the data transmission be used. This is the case when the current is the primary source does not have a pure sinusoidal shape and therefore in the frequency spectrum of the current also higher Frequencies occur that can interfere with data transmission. From The advantage here can be the integration of a leakage transformer, its gear ratio to Current adjustment is used, however, its leakage reactance to reduce the Current overshoots is being used.
  • To Claim 11 is to provide a filter at the entry point of the route, the lowest possible Impedance for the frequencies of data transmission Has. In this way, the power source for this frequency range is bridged and the current flow of the induced data frequencies through the primary conductor allows. The current flow is so independent from the impedance of the power supply. The transmission behavior of the system improves thereby. An advantageous type of filter is a series resonant circuit (Suction circuit) which is adjusted to a data frequency and for this represents a low impedance. When using multiple data frequencies can Also several series resonant circuits may be required.
  • To Claim 12 should also consumers with frequency filters in the Be fitted with a disturbing reaction on their part data transfer is avoided. This case can occur if through a downstream electronics (eg a switching power supply) the current consumption is not in phase to the voltage is (eg clocked) and therefore high-frequency interfering currents (harmonics) in the primary conductor be generated.
  • claim 13 points out that not only transport systems are beneficial with a data transfer can be provided but also other consumers. It creates the possibility of individual To switch consumers or to give them control values.
  • Further advantageous features of the invention will become apparent from the other dependent claims.
  • The The invention will be described below in conjunction with the accompanying drawings at exemplary embodiments explained in more detail. It demonstrate:
  • 1 and 2 the basic structure of two embodiments of the device according to the invention;
  • 3 a cross section through a receiving coil;
  • 4 a cross section through a transmitting coil;
  • 5 and 6 Cross sections through two embodiments of a transmitting and receiving coil;
  • 7 an exemplary amplitude characteristic for a transmission signal having different frequencies; and
  • 8th schematically a device for switching a transmitter to different transmission frequencies.
  • The device according to the invention serves for non-contact inductive transmission of data in a system for non-contact inductive energy transmission. The energy transmission system is used, among other things, in ground-based corridor transport systems or crane systems. It is an ac-flowed pri märleitersystem, from the field inductively energy is extracted. Data is transmitted to a vehicle powered in this manner by virtue of the fact that the primary conductor system takes over the routing of the data streams by line.
  • To become the ones to be transferred Data corresponding electrical currents via a transmitting coil in the primary line induced and conducted at another point from the primary line again inductive ausgekop pelt. The data transfer used frequencies differed from the fundamental frequency of the Primary conductor, so that in the receiver be restored by suitable frequency filter, the useful signals or the data can. For the transmission the data can different modulation types and carrier frequencies are used.
  • In 1 is the basic structure of the overall system shown. A power source 1 feeds an alternating current into a primary conductor 2 . 7 . 8th one. A frequency filter 3 attenuates those from the power source 1 outgoing interference for the relevant frequency range for data transmission. A sucking circle 4 is tuned to the data transmission frequencies. It virtually forms a short circuit for these frequencies and allows a current flow of the modulated data frequencies, because forward conductors 7 and return conductor 8th form a conductor loop. pantograph 9 . 14 , Transmitter 10 . 15 and receiver 11 . 16 are inductive with the field of forward and return conductors 7 . 8th coupled. The conductors are guided in parallel. At their entry points 5 . 6 the primary alternating current is supplied. The endpoints 12 . 13 are connected. transmitter 10 respectively. 15 , Receiver 11 respectively. 16 and pantographs 9 respectively. 14 are shown here as separate units and can be z. B. on a mobile consumer.
  • In 2 , in which the same parts are given the same reference number, only a forward conductor 27 used for coupling and decoupling energy and data. A return conductor 28 only used for current feedback. The conductor loop can take any shape.
  • In 3 is a cross section through a receiving coil 33 presented as they are after 2 is used. A U-shaped ferrite core 32 collects the field of a leader 31 , The receiver coil 33 forms together with R and C a damped resonant circuit 34 which is set to the frequency of the data and serves to suppress the primary current frequency. It is advantageous if the two frequencies of a digital data transmission (LOW and HIGH) are so close to each other that both the resonant circuit 34 can happen. In a subsequent electronics 35 the signal states are again assigned to the individual data frequencies (FM demodulation).
  • In 4 is a cross section through a transmitting coil 42 presented as they are after 2 is used. The legs of the U-shaped ferrite core 41 are longer than the receiver coil 33 to 3 and include a ladder 40 to increase the degree of coupling. The ferrite cores 32 . 41 from 3 and 4 are interchangeable in principle.
  • In 5 and 6 have back and forth conductors 51 . 52 a parallel arrangement. The 5 shows the cross section of a transmitting or receiving coil 54 with E-shaped ferrite core 53 , The sink 54 includes the middle leg of the ferrite core 53 , 6 shows the same ferrite core 53 with a different coil distribution. Each leg is here by a coil 61 . 62 . 63 which can lead to a more even flow distribution. Basically, different ferrite core shapes are possible. The representation of the E-shaped ferrite core 53 should only serve to clarify a basic arrangement.
  • In 7 the amplitude oscillation of the transmission frequency is shown. Bit 1 and bit 2 are transmitted by different frequencies. The frequencies are selected so that when the sine wave is connected in the zero crossing, exactly the period duration specified by the baud rate (eg T = 52.08 μs) is reached. The frequencies f1 and f2 merge without phase jump. Bit 3 corresponds to bit1. Here, too, the transition to the frequency f2 takes place without a phase jump.
  • In 8th schematically shows the switching between two different transmission frequencies, wherein the one frequency z. B. with a square wave generator 81 with subsequent transmission amplifier 83 and the other frequency z. B. with a square wave generator 82 and connected transmit amplifier 84 is produced. The of the two transmit amplifiers 83 . 84 emitted signals are via a switch 85 the input of a series resonant circuit 88 from a capacitor 89 and a coil 90 fed to which a damping resistor 91 followed.
  • The series resonant circuit 88 is z. B. on the frequency of the transmission amplifier 84 matched to the upcoming signal. Set by flipping the switch 85 the signal of the transmission amplifier 83 will be sent simultaneously with the switch 85 also an otherwise open switch 86 closed. This will cause the capacitor 89 a second capacitor 87 connected in parallel and the resonant circuit 88 to the frequency of the transmitter amplifier 83 matched to the upcoming signal. Regardless of which of the two signals is to be transmitted, the resonant circuit 88 therefore always in one ideally balanced condition. It can be z. B. the signal with the frequency f1 ( 7 ) from the transmission amplifier 83 and the signal with the frequency f2 ( 7 ) from the transmitter amplifier 84 are discharged while through the switch 86 the desired bit sequence is determined. The sink 90 can z. B. accordingly
  • 5 be educated. Should it simultaneously act as a receiver coil ( 5 . 6 ), the circuit will after 8th supplemented by corresponding switching elements for demodulation.
  • The The invention is not limited to the described embodiments which could be modified in many ways. This is especially true for the Formation of the transmitting and / or receiving coils for inductive Coupling or decoupling of the transmitting Data used and the number of designated data channels. Especially can through transmission of signals with two further frequencies f3, f4 and f5, f6 etc. further data channels be created, in which analogously to the described embodiment z. For example, the frequencies f3 and f5 are LOW and the frequencies f4 and f6 have the meaning HIGH. Besides, it would be possible over the primary conductor by inductive coupling or decoupling also to operate the Transmitter and / or receiver required To transfer energy no matter if this is stationary or are arranged mobile. Furthermore, it is possible in the described Way to transmit command data the z. B. serve the purpose along the primary conductor to control arranged or mobile consumers (eg in the sense of the switching on or off of lighting fixtures). Finally understands itself that the different characteristics also in other than those shown and combinations described can be applied.

Claims (17)

  1. Device for transmitting data within a system for non-contact inductive energy transmission, wherein a primary current conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) is also used for the transmission of data, except that the data is inductively fed into the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) and that the return conductor or only one of these two conductors of the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) are used for coupling and decoupling the data, whereby the data is simultaneously transmitted in multiple data channels via the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 40 . 51 . 52 ) are assigned by the signal states in these data channels are assigned to two different frequencies (f1, f2), characterized in that the one frequency (f1) by means of a generator with subsequent transmission amplifier ( 83 ) and the other frequency (f2) by means of a generator and a connected transmission amplifier ( 84 ) and that of the two transmit amplifiers ( 84 . 85 ) emitted signals via a first switch ( 85 ) the input of a series resonant circuit ( 88 ), consisting of a coil ( 90 ), a capacitor ( 89 ) and a damping resistor ( 91 ), wherein a second switch ( 86 ) is provided for adapting the series resonant circuit to the two frequencies (f1, f2) of the rectangular generators ( 81 . 82 ) and simultaneously with the first switch ( 85 ), wherein by means of the second changeover switch, a second capacitor ( 87 ) parallel to the capacitor ( 89 ) of the series resonant circuit ( 88 ) is switched.
  2. Apparatus according to claim 1 or 2, characterized in that different logic states of the digital data to be transmitted by the inductive coupling of different frequencies (f1, f2) in the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ), each corresponding to a particular logic state.
  3. Apparatus according to claim 1 or 2, characterized in that for inductive coupling or decoupling in a transmitting or receiving coil ( 33 . 42 . 54 . 61 to 63 ) a ferrite core ( 32 . 41 53 ) is used.
  4. Device according to one of claims 1 to 3, characterized that transmit and receiver coil identical or identical.
  5. Device according to one of claims 1 to 4, characterized in that the transmitter and receiver by a separate, inductive energy transfer from the field of the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) are supplied.
  6. Device according to one of claims 1 to 5, characterized that transmitter and / or receiver and / or power unit together on a vehicle.
  7. Device according to one of claims 1 to 6, characterized in that the inductive transmission of the data via the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) is realized in that in the gap between transmitting or receiving coil ( 33 . 42 . 54 . 61 to 63 ) and primary conductors ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) in place of gaseous media such as air-fluid media (eg, water, oil, etc.).
  8. Device according to one of claims 1 to 7, characterized that a transmitter and / or receiver is stationary on sides of the primary manager located, unlike the transceivers on the moving vehicles.
  9. Device according to one of claims 1 to 8, characterized in that by filters ( 34 ) in the receiver, the fundamental frequency of the primary current as a disturbance in the received signal is reduced so much that the modulated for data transmission frequency (s) can be evaluated.
  10. Device according to one of claims 1 to 9, characterized in that at the entry point ( 5 . 6 ) of the power used for the transmission of energy into the primary conductor ( 7 . 8th ) a frequency filter ( 3 ) reduces the frequency component of the primary current used for data transmission.
  11. Device according to one of claims 1 to 10, characterized in that the transmission of data via the primary conductor ( 7 . 8th ) at the entry point ( 5 . 6 ) of the current into the primary conductor ( 7 . 8th ) parallel to the feed one or more frequency filters ( 4 ), which are tuned to the frequency range used by the data transmission and thereby reduce the impedance for this frequency range.
  12. Device according to one of claims 1 to 11, characterized in that on the vehicle side suitable input and output filters are mounted, which provide for a reduction of the noise level in the frequency range, for the data transmission via the primary conductor ( 2 . 7 . 8th . 27 . 28 . 31 . 40 . 51 . 52 ) is used.
  13. Device according to one of claims 1 to 12, characterized that the data transfer rate elevated is added by the control signals of the frequencies corresponding to the logic states Change frequency without phase jump into each other.
  14. Device according to one of claims 1 to 13, characterized that the data transfer It is also used for targeted control of individual consumers in a complex transmission system with several, selective consumers.
  15. Device according to one of claims 1 to 14, characterized that for the data transmission Frequency, amplitude, and / or Pha senmodulationsverfahren and / or Coding and / or correlation method are provided.
  16. Device according to one of claims 1 to 15, characterized that the data transfer rate thereby increased is that the resonant circuit elements are switched and the energy storage have an initial energy state to determine the settling times of Reduce transmission and reception circuit.
  17. Device according to one of claims 1 to 16, characterized in that the generators for generating the frequencies (f1, f2) are square-wave generators are.
DE10112892A 2001-03-15 2001-03-15 Device for transmitting data within a system for non-contact inductive energy transmission Expired - Fee Related DE10112892B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10112892A DE10112892B4 (en) 2001-03-15 2001-03-15 Device for transmitting data within a system for non-contact inductive energy transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10112892A DE10112892B4 (en) 2001-03-15 2001-03-15 Device for transmitting data within a system for non-contact inductive energy transmission

Publications (2)

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DE10112892A1 DE10112892A1 (en) 2002-10-10
DE10112892B4 true DE10112892B4 (en) 2007-12-13

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DE10312284B4 (en) * 2003-03-19 2005-12-22 Sew-Eurodrive Gmbh & Co. Kg Transducer head, system for contactless energy transmission and use of a transmitter head
WO2004090918A1 (en) * 2003-04-07 2004-10-21 Auckland Uniservices Limited Communications for inductive power systems
DE10360599A1 (en) * 2003-12-19 2005-07-21 Sew-Eurodrive Gmbh & Co. Kg investment
DE10360604A1 (en) * 2003-12-19 2005-07-21 Sew-Eurodrive Gmbh & Co. Kg Consumer and system
DE102005022367A1 (en) * 2005-05-10 2006-11-16 Sew-Eurodrive Gmbh & Co. Kg Consumer and system
US9478133B2 (en) 2006-03-31 2016-10-25 Volkswagen Ag Motor vehicle and navigation arrangement for a motor vehicle
US20070233371A1 (en) 2006-03-31 2007-10-04 Arne Stoschek Navigation system for a motor vehicle
DE102008011582B4 (en) * 2008-02-28 2012-10-31 Sew-Eurodrive Gmbh & Co. Kg Data transmission device and system
DE102008064710B4 (en) * 2008-02-28 2013-04-04 Sew-Eurodrive Gmbh & Co. Kg Data transmission device for use in electrical consumer, has secondary inductor inductively coupled to primary inductor, and series resonance circuit connected parallel to another series resonance circuit and coupled to primary inductor
GB2461577A (en) 2008-07-04 2010-01-06 Bombardier Transp Gmbh System and method for transferring electric energy to a vehicle
GB2461578A (en) 2008-07-04 2010-01-06 Bombardier Transp Gmbh Transferring electric energy to a vehicle
GB2463693A (en) 2008-09-19 2010-03-24 Bombardier Transp Gmbh A system for transferring electric energy to a vehicle
GB2463692A (en) 2008-09-19 2010-03-24 Bombardier Transp Gmbh An arrangement for providing a vehicle with electric energy
EP2612269B1 (en) 2010-08-31 2017-11-01 DET International Holding Limited Method and apparatus for load identification
WO2013098647A2 (en) 2011-12-28 2013-07-04 Delta Electronic (Thailand) Public Company Limited Resonant bi-directional dc-ac converter
US9196417B2 (en) 2012-05-04 2015-11-24 Det International Holding Limited Magnetic configuration for high efficiency power processing
US9530556B2 (en) 2012-05-04 2016-12-27 Det International Holding Limited Multiple resonant cells for wireless power mats
US10553351B2 (en) * 2012-05-04 2020-02-04 Delta Electronics (Thailand) Public Co., Ltd. Multiple cells magnetic structure for wireless power
US9494631B2 (en) 2012-05-04 2016-11-15 Det International Holding Limited Intelligent current analysis for resonant converters
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DE4236340C2 (en) * 1992-10-28 1994-11-10 Daimler Benz Ag Arrangement for the inductive transmission of energy
DE19512523A1 (en) * 1995-04-03 1996-10-10 Daimler Benz Ag Track-guided transport system for goods conveying
DE19540854A1 (en) * 1995-11-10 1997-05-22 Karl Heinz Schmall Electromagnetic multi-way coupler for telecommunications and data transmission systems
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WO1998057413A1 (en) * 1997-06-12 1998-12-17 Auckland Uniservices Limited Wireless signals in inductive power transfer systems

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Effective date: 20131001