Inductive energy transmission system

• US 10,249,432 B2
• Filed: 07/29/2015
• Issued: 04/02/2019
• Est. Priority Date: 08/29/2014
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Krupezevic, Dragan, Mack, Juergen, Rejman, Marcin, Gonda, Martin
• Primary Examiner(s): Deberadinis, Robert
• Application Number:
  US15/505,549
• Publication Number:
  US 20170256355A1
• Time in Patent Office: 1,343 Days
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/33 Arrangements for noise damping
• CPC Class Codes: 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
• CPC Class Codes: 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
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

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

1. 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.

2. The inductive energy transmission system of claim 1, 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.

3. The inductive energy transmission system of claim 1, 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.

4. The inductive energy transmission system of claim 3, wherein the conductive layer of the second capacitor is configured in a fleece-like manner from a carbon material.

5. The inductive energy transmission system of claim 3, wherein the conductive layer is configured to be woven or pressed.

6. The inductive energy transmission system of claim 3, wherein the conductive layer is connected to the local ground potential by conductive reinforcement elements.

7. The inductive energy transmission system of claim 1, 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.

8. The inductive energy transmission system of claim 1, 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.

9. The inductive energy transmission system of claim 1, 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.

10. 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.

11. The method of claim 10, 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.

12. The method of claim 11, wherein the conductive layer is configured as a fleece-like fabric made of a carbon material.