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WO2018077580A1 - Dispositif de protection pour un système de transfert d'énergie par induction et système de transfert d'énergie par induction - Google Patents

Dispositif de protection pour un système de transfert d'énergie par induction et système de transfert d'énergie par induction Download PDF

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Publication number
WO2018077580A1
WO2018077580A1 PCT/EP2017/075133 EP2017075133W WO2018077580A1 WO 2018077580 A1 WO2018077580 A1 WO 2018077580A1 EP 2017075133 W EP2017075133 W EP 2017075133W WO 2018077580 A1 WO2018077580 A1 WO 2018077580A1
Authority
WO
WIPO (PCT)
Prior art keywords
primary coil
transmission system
inductive energy
protection device
energy transmission
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.)
Ceased
Application number
PCT/EP2017/075133
Other languages
German (de)
English (en)
Inventor
Bernhard Mader
Oliver Blum
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE102016222530.8A external-priority patent/DE102016222530A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2018077580A1 publication Critical patent/WO2018077580A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens

Definitions

  • the present invention relates to a protective device for an inductive power transmission system with a primary coil and a secondary coil and an inductive energy transmission system with such
  • the document DE 10 2011 010 049 AI discloses a device for charging a battery of a vehicle, wherein the electrical energy for charging the battery between a coil in the vehicle and a coil in the
  • Charging station is transmitted inductively.
  • Energy transmission systems also generate high high-frequency alternating voltages when generating the magnetic fields in the transmission coils.
  • Transmission coils a capacitor. In this way, the metal surfaces in the vicinity of the transmission coils for an alternating current to the
  • the metal surfaces may be electrically connected to the reference potential, or the transmission coils may be electrically isolated. Disclosure of the invention
  • the present invention discloses a protective device for an inductive power transmission system having the features of claim 1 and an inductive power transmission system having the features of claim 9.
  • a protection device for an inductive power transmission system having a primary coil and a secondary coil.
  • the protection device comprises a shielding device.
  • the shielding means is disposed between the primary coil and the secondary coil.
  • the protection device is designed to shield an electric field of the primary coil.
  • An inductive power transmission system having a primary coil adapted to orgatively provide an alternating magnetic field and a shielding device according to the invention.
  • the screen device shields a parasitic alternating electrical field of the primary coil.
  • the present invention is based on the finding that in an inductive energy transfer, in particular in an inductive
  • the present invention is therefore based on the idea to take this finding into account and a protective device for an inductive Provide energy transfer, which an undesirable capacitive current flow at a contact of metal surfaces in the vicinity of
  • the protective device Since the danger of significant and sometimes dangerous electrical alternating currents in the event of contact by the shield device can be prevented by the protective device according to the invention, no further complex additional protective measures are required. As a result, the inductive power transmission system can be simplified. In particular, the required costs for a safe inductive energy transmission system are reduced.
  • the screening device is for one of
  • Umbrella device thus absorbs exclusively the alternating electric field, while the magnetic alternating field can continue to pass through the shield device unhindered or at least approximately unhindered.
  • the screening device is provided with a
  • the shield device can be electrically coupled to a reference potential, which corresponds to the reference potential of the environment on which the primary coil is arranged. In this way, the screen device and
  • the screening device comprises a plurality of radial conductor tracks.
  • the central point at which the beams of this radial track arrangement meet can coincide with a point on a center axis of the primary coil.
  • the shielding device comprises a plurality of parallel conductor tracks.
  • the conductor tracks are electrically connected to each other here.
  • the interconnects may, for example, have a comb-shaped or a meander-shaped interconnect structure.
  • Conductor tracks can also be achieved a good absorption of the electric alternating fields, without the magnetic alternating field is significantly attenuated.
  • adjacent conductor tracks have a maximum distance of 1 mm.
  • neighboring can
  • Conductor tracks have a distance of less than 1 mm, for example, 0.5 mm, 0.1 mm or less.
  • the conductor tracks of the screen device are arranged on an electrically insulating carrier substrate.
  • the electrically insulating carrier substrate may be a foil, in particular a plastic foil or the like. In this way, an efficient and inexpensive screen device can be realized.
  • the conductor tracks are printed on the electrically insulated carrier substrate.
  • electrical conductor track structures by printing electrical conductor track structures, a very flexible and inexpensive screen device can be realized.
  • the shielding device is arranged on the primary coil.
  • the Umbrella means an area which at least the surface of
  • Figure 1 a schematic representation of an inductive
  • FIG. 1-5 schematic representations of screen devices according to
  • Figure 1 shows a schematic representation of an inductive
  • the inductive energy transmission system comprises a primary coil 2.
  • This primary coil 2 is designed to provide an alternating electric field.
  • a feed device 3 to the primary coil 2, an electrical
  • AC voltage can be provided.
  • This alternating electrical voltage causes in the primary coil 2 an electrical alternating current, which in turn causes by the primary coil 3, an alternating magnetic field.
  • the electrical alternating voltage and thus of the alternating magnetic field can correspond to any given frequency. In particular, for example, frequencies between 30 and 140 kHz, in particular frequencies in the range of 85 kHz are possible.
  • the alternating magnetic field generated by the primary coil 2 couples into a secondary coil 4 and thereby induces an alternating electrical current in the secondary coil 4.
  • This alternating current can be provided, for example, to a charge controller 5.
  • This charge controller 5 can then provide, for example, electrical energy to an electrical energy store 6, for example a traction battery of an electric or hybrid vehicle. In this way, the electrical energy storage 6 can be charged without a galvanic connection to an energy source has to be established between the electrical energy store 6 or the charge controller 5.
  • a protective device 1 is additionally arranged between the primary coil 2 and the secondary coil 4. In particular, this protection device 1 directly above the primary coil 2 or in a
  • predetermined distance from the primary coil 2 may be arranged.
  • Protective device 1 in particular has a shielding device which shields an alternating electric field of the primary coil 2 in the direction of the secondary coil 4. In this way, high frequency alternating voltages occurring at the primary coil 2 during the inductive energy transmission can not be coupled to further metal parts in the region of the secondary coil 4.
  • the shielding device of the protection device 1 can for example be coupled to a reference potential of the primary side.
  • the shielding device of the protection device 1 can for example be coupled to a reference potential of the primary side.
  • Screen device of the protective device 1 are electrically coupled to the potential on which the area around the primary coil 1 is located.
  • Screen device of the protective device 1 for magnetic fields, in particular for magnetic alternating fields permeable the screen device designed such that due to the magnetic field of the primary coil 2 possible no or at least only very small eddy currents within the
  • Forming umbrella device This can be achieved in particular by the fact that in the screen device no closed annular
  • the shielding device may have any suitable structure which, on the one hand, shields as much as possible an electric field from the primary coil 2 and thereby transmits the magnetic fields generated by the primary coil 2. Some possible embodiments of this will be described in more detail below.
  • FIG. 2 shows a schematic illustration of a printed conductor structure for the screening device of the protective device 1 according to one embodiment.
  • the shield device has a plurality of parallel conductor tracks 10, which are electrically connected to one another at one end. In this way, a kind of comb-shaped conductor track structure arises.
  • Conductor structure is electrically coupled at a location with a reference potential.
  • the distances between the individual adjacent interconnects 10 are each 1 millimeter or less.
  • the distances between the individual conductor tracks 10 may each be 0.5 millimeters, 0.1 millimeters or less.
  • the conductor tracks 10 may be arranged in this embodiment, as well as in all subsequent example, on an electrically insulating carrier substrate (not shown here).
  • this electrically insulating carrier substrate may be a plastic film or the like.
  • the individual conductor tracks 10 may also be arranged, for example, between two plastic films or between two electrically insulating substrates. In this way, reliable protection of the
  • the printed conductor structure can be printed on the carrier substrate, vapor-deposited or applied to the carrier substrate in any other method, for example.
  • suitable materials for the conductor tracks 10 for example, metals such as silver, copper, aluminum or other electrically conductive substances such as graphite or the like in question.
  • FIG. 3 shows a schematic representation of a screen device according to a further embodiment.
  • the first embodiment shows a schematic representation of a screen device according to a further embodiment.
  • the second embodiment shows a schematic representation of a screen device according to a further embodiment.
  • Screen device also several parallel conductor tracks.
  • the individual strip conductors 10 are not all electrically connected to one another on one side, but the strip conductor structure has a meander-shaped strip conductor structure. Also in this case is the
  • Conductor structure at a single point electrically coupled to a reference potential.
  • FIG. 4 shows a schematic illustration of a further embodiment of a shield device of the protective device 1.
  • the strip conductors 10 have a star-shaped structure.
  • the individual conductor tracks 10 are electrically connected to each other at a central point, for example in the middle. Starting from this center, the conductor track structure has a radial geometry. Order here
  • additional conductor tracks can optionally also be provided in the outer area, which are suitably connected to the conductor tracks which converge in the center.
  • This track structure is also connected to a reference potential at a single point.
  • FIG. 5 shows a schematic representation of a screen device for a protective device 1 according to a further embodiment.
  • the shield means a meandering
  • this conductor track structure is connected to a reference potential at one point.
  • meander-shaped track structure in the annulus to be open at least one point.
  • the shield device can be provided in all embodiments, for example in the areas of the primary coil 2, where large voltages occur.
  • a printed conductor structure can be realized which preferably or exclusively shields edge regions of the primary coil 2.
  • the primary coil 2 covers the entire surface and is reinforced, for example, in particular at the areas where large voltages occur.
  • the present invention relates to a protection device for an inductive power transmission system. Between the primary coil and the secondary coil of an inductive energy transmission, a shield is provided, which although for the magnetic fields of the inductive
  • Conductor be provided structure in which form no eddy currents.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

La présente invention concerne un dispositif de protection pour un système de transfert d'énergie par induction. Un blindage est placé entre la bobine primaire et la bobine secondaire du système de transfert d'énergie par induction, ce blindage étant perméable aux champs magnétiques du système de transfert d'énergie par induction, mais protégeant de manière fiable contre les champs électriques produits. À cet effet, on peut prévoir en particulier une structure à pistes conductrices appropriée dans laquelle aucun courant de Foucault ne se forme.
PCT/EP2017/075133 2016-10-26 2017-10-04 Dispositif de protection pour un système de transfert d'énergie par induction et système de transfert d'énergie par induction Ceased WO2018077580A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102016221011.4 2016-10-26
DE102016221011 2016-10-26
DE102016222530.8 2016-11-16
DE102016222530.8A DE102016222530A1 (de) 2016-11-16 2016-11-16 Schutzvorrichtung für ein induktives Energieübertragungssystem und induktives Energieübertragungssystem

Publications (1)

Publication Number Publication Date
WO2018077580A1 true WO2018077580A1 (fr) 2018-05-03

Family

ID=60051500

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/075133 Ceased WO2018077580A1 (fr) 2016-10-26 2017-10-04 Dispositif de protection pour un système de transfert d'énergie par induction et système de transfert d'énergie par induction

Country Status (1)

Country Link
WO (1) WO2018077580A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070180684A1 (en) * 2004-10-18 2007-08-09 Murata Manufacturing Co., Ltd. Method for manufacturing monolithic ceramic electronic component, and multilayer composite
WO2010001339A2 (fr) * 2008-07-02 2010-01-07 Nxp B.V. Bobine planaire monolithiquement intégrée
DE102011010049A1 (de) 2011-02-01 2011-11-03 Daimler Ag Ladevorrichtung und Verfahren zum Laden einer Batterie eines Fahrzeugs
WO2013191178A1 (fr) * 2012-06-19 2013-12-27 株式会社新日本電波吸収体 Matériau de blindage pour antenne cadre, unité de blindage, étiquette de blindage
DE102012219985A1 (de) * 2012-10-31 2014-04-30 Robert Bosch Gmbh Vorrichtungen zur induktiven Energieübertragung an ein elektrisch antreibbares Fahrzeug
US20160057900A1 (en) * 2013-04-02 2016-02-25 Vacuumschmelze Gmbh & Co. Kg Shielding film and method for producing a shielding film

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070180684A1 (en) * 2004-10-18 2007-08-09 Murata Manufacturing Co., Ltd. Method for manufacturing monolithic ceramic electronic component, and multilayer composite
WO2010001339A2 (fr) * 2008-07-02 2010-01-07 Nxp B.V. Bobine planaire monolithiquement intégrée
DE102011010049A1 (de) 2011-02-01 2011-11-03 Daimler Ag Ladevorrichtung und Verfahren zum Laden einer Batterie eines Fahrzeugs
WO2013191178A1 (fr) * 2012-06-19 2013-12-27 株式会社新日本電波吸収体 Matériau de blindage pour antenne cadre, unité de blindage, étiquette de blindage
DE102012219985A1 (de) * 2012-10-31 2014-04-30 Robert Bosch Gmbh Vorrichtungen zur induktiven Energieübertragung an ein elektrisch antreibbares Fahrzeug
US20160057900A1 (en) * 2013-04-02 2016-02-25 Vacuumschmelze Gmbh & Co. Kg Shielding film and method for producing a shielding film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Proceedings of the Institute of Radio Engineers", vol. 24, 1 June 1936, article ST PAUL: "ELECTROMAGNETIC SHIELDING EFFECT OF AN INFINITE PLANE CONDUCTING SHEET PLACED BETWEEN CIRCULAR COAXIAL COILS* BY SAMUEL LEVY", XP055439725 *

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