# US 2017/0256355 A1 · Inductive energy transmission system

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- Number: US 2017/0256355 A1
- Document ID: US20170256355A1
- Status: Published application
- Kind: A1
- Application number: 15/505,549
- Filed: 2015-07-29
- Published: 2017-09-07
- Earliest claimed: 2014-08-29
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: Dragan KRUPEZEVIC; Juergen MACK; Marcin REJMAN; Martin GONDA
- Web page: https://patentgrep.com/patent/US20170256355A1

## CPC

- H01F 38/14: Inductive couplings
- H01F 27/2828: {Construction of conductive connections, of leads}
- H01F 27/42: Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils (circuits for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output H02P13/00; impedance networks H03H)
- H02J 50/10: using inductive coupling
- H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields
- H01F 27/33: Arrangements for noise damping
- H01F 27/34: Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

An inductive energy transmission system including: a primary coil connectible to an electrical useful voltage source, the primary coil being connected to a first capacitor, the first capacitor being connected to a local ground potential of the energy transmission system; and a secondary coil inductively coupled to the primary coil; wherein a second capacitor is situated between the primary coil and the local ground potential of the energy transmission system.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

An inductive energy transmission system, comprising:
a primary coil that is connectible to an electrical useful voltage source, the primary coil being connected to a first capacitor, the first capacitor being connected to a local ground potential of the energy transmission system; and
a secondary coil inductively coupled to the primary coil;
wherein a second capacitor is between the primary coil and the local ground potential of the energy transmission system.

### Claim 12 (depends on 11)

The inductive energy transmission system of claim 11, wherein a first electrode of the second capacitor is formed by the primary coil and a second electrode of the second capacitor is connected to the local ground potential.

### Claim 13 (depends on 11)

The inductive energy transmission system of claim 11, wherein the second electrode of the second capacitor is configured in layers, a conductive layer being covered on opposite surfaces by respectively one insulating layer.

### Claim 14 (depends on 13)

The inductive energy transmission system of claim 13, wherein the conductive layer of the second capacitor is configured in a fleece-like manner from a carbon material.

### Claim 15 (depends on 13)

The inductive energy transmission system of claim 13, wherein the conductive layer is configured to be woven or pressed.

### Claim 16 (depends on 13)

The inductive energy transmission system of claim 13, wherein the conductive layer is connected to the local ground potential by conductive reinforcement elements.

### Claim 17 (depends on 11)

The inductive energy transmission system of claim 11, wherein the second capacitor has a capacitance value that is at least approximately twice as great as a parasitic ground capacitance of the inductive energy transmission system.

### Claim 18

A method for manufacturing an inductive energy transmission system, the method comprising:
providing a primary coil;
connecting the primary coil to a first capacitor;
connecting the first capacitor to a local ground potential of the energy transmission system;
providing a secondary coil; and
providing a second electrode of a second capacitor, the second electrode of the second capacitor being connected to the local ground potential.

### Claim 19 (depends on 18)

The method of claim 18, wherein the second electrode is configured in layered fashion having a conductive layer and respectively one insulating layer on opposite surfaces of the conductive layer.

### Claim 20 (depends on 19)

The method of claim 19, wherein the conductive layer is configured as a fleece-like fabric made of a carbon material.

### Claim 21 (depends on 11)

The inductive energy transmission system of claim 11, wherein the second capacitor has a capacitance value that is at least approximately six times to approximately ten times as great as a parasitic ground capacitance of the inductive energy transmission system.

### Claim 22 (depends on 11)

The inductive energy transmission system of claim 11, wherein the second capacitor has a capacitance value that is at least approximately three times to approximately five times as great as a parasitic ground capacitance of the inductive energy transmission system.