DEVICE FOR THE INDUCTIVE TRANSMISSION OF ELECTRICAL ENERGY

• US 20140292091A1
• Filed: 11/09/2011
• Published: 10/02/2014
• Est. Priority Date: 12/16/2010
• Status: Active Grant

• Current Assignee: ENRX IPT GmbH
• Original Assignee: Conductix-Wampfler GmbH (Delachaux Group SA)
• Inventors: Wechlin, Mathias, Asselin, Pascal
• Granted Patent: US 9,473,211 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A device for the inductive transmission of electrical energy having a coil which can be inductively coupled to another coil for energy transmission; a power electronic unit for drawing electrical power from the coil or for outputting electrical power into the coil; and a feedline connecting the coil to the power electronic unit. The feedline includes at least two multi-conductor cables with conductors which are insulated from one another and the connection of each terminal of the coil to a respectively assigned terminal of the power electronic unit includes a plurality of conductors of the multi-conductor cables. Each terminal of the coil is preferably connected to the respectively assigned terminal of the power electronic unit by conductors of at least two different cables and the same number of conductors of each individual cable connect each terminal of the coil to the respectively assigned terminal of the power electronic unit.

Claims

1. Device for the inductive transmission of electrical energy with a coil, which can be coupled inductively with another coil by the suitable positioning of the two coils relative to one another for the energy transmission, with a power electronic unit for the drawing of electrical power from the coil or for the output of electrical power to the coil, and with a feedline that connects the coil to the power electronic unit wherein, feedline consists of includes at least two multi-conductor cables with conductors that are insulated from one another, and that the connection of each terminal of the coil to a respectively assigned terminal of the power electronic unit includes a plurality of conductors of the multi-conductor cables.

2. Device according to claim 1, wherein each terminal of the coil is connected to the respectively assigned terminal of the power electronic unit by conductors of at least two different cables.

3. Device according to claim 2, the same number of conductors of each individual cable connect each of the two terminals of the coil to the respectively assigned terminal of the power electronic unit.

4. Device according to claim 3, wherein in the cross section of each cable, the conductors are symmetrically arranged and are assigned to the terminals of the coil in such a manner that conductors with the same current direction are always arranged in pairs and symmetrical to the center of a cable, and conductors with current directions opposite to one another alternate in the circumferential direction on each circle defined by the center of the cable and the centers of two conductors symmetrical to one another.

5. Device according to claim 1, wherein all conductors of a cable that connect a terminal of the coil to the same terminal of the power electronic unit for the uniform distribution of the total current are conducted cyclically and in pairs among the individual conductors with current directions opposite to one another, through closed magnetic cores.

6. Device according to claim 1, wherein the total cross section of none of the multi-conductor cables exceeds the design height of the coil.

7. Device according to claim 1, wherein the coil is a secondary coil that can be installed on a vehicle and is intended for power input.

8. Device according to claim 1, wherein the coil is a primary coil that can be installed on a stationary unit and is intended for power output.