System for non-contact transmission of electrical energy to a mobile part

Abstract

In a system for a non-contact transmission of electrical energy to a mobile part, the system has a bore introduced into a floor material, a frame part is accommodated in the bore, a receiving part is situated in the frame part, an electronic circuit is situated in the receiving part, the receiving part is at least partially covered by a cover part in the manner of a housing, in particular on one of its sides, a sheet-metal part is situated between the receiving part and the frame part, and the sheet-metal part touches the receiving part and the sheet-metal part touches the frame part.

Claims

1. A system for a non-contact transmission of electrical energy to a mobile part, comprising: a frame part adapted to be accommodated in a bore provided in a floor material; a receiver part arranged in the frame part; an electronic circuit arranged in the receiving part; a cover at least partially covering the receiver part; and sheet-metal part arranged between the receiver part and the frame part and touches the receiver part and the frame part.

2. The system according to claim 1, wherein the cover at least partially covers at least one side of the receiver part.

3. The system according to claim 1, wherein the sheet-metal part is made of corrugated sheet metal and is produced from aluminum and/or copper.

4. The system according to claim 1, wherein the frame part is adapted to be integrally connected to the floor material by a casting compound.

5. The system according to claim 1, wherein the receiver part is made from plastic.

6. The system according to claim 1, wherein the sheet-metal part is produced from corrugated sheet and surrounds the receiving part in a circumferential direction.

7. The system according to claim 1, wherein the electronic circuit includes a power inverter and/or a gyrator.

8. The system according to claim 1, wherein the electronic circuit includes a power inverter and a gyrator, a connection of the power inverter on an alternating voltage side connected to an input side of the gyrator, and an output-side connection of the gyrator is connected to a primary winding, components of the gyrator being resonantly adapted to a frequency of an alternating voltage supplied at an output of the power inverter on the alternating voltage side.

9. The system according to claim 8, wherein the components of the gyrator includes a capacitance and/or an inductance.

10. The system according to claim 1, wherein a primary winding, adapted to be inductively coupled to a secondary winding provided on an underside of the mobile part, is provided in the cover part.

11. The system according to claim 1, wherein a number of corrugations extending in a circumferential direction is greater than twenty.

12. The system according to claim 1, wherein the sheet-metal part is produced from aluminum or copper.

13. The system according to claim 1, wherein the cover part is made from plastic.

14. A system for a non-contact transmission of electrical energy to a mobile part, comprising: a frame part accommodated in a bore provided in a floor material; a receiver part arranged in the frame part; an electronic circuit arranged in the receiving part; a cover at least partially covering the receiver part; and sheet-metal part arranged between the receiver part and the frame part and touches the receiver part and the frame part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic exploded view of a system for a non-contact transmission of electric energy to a mobile part.

(2) FIG. 2 is an associated schematic cross-sectional view.

DETAILED DESCRIPTION

(3) As schematically illustrated in FIGS. 1 and 2, floor material 2 of the floor of a system is provided with a coating 1 whose surface functions as a travel surface for a mobile part.

(4) Situated on the underside of the mobile part is a secondary winding, which is able to be inductively coupled to a primary winding situated on the floor at a position of the mobile part.

(5) Reinforcement 10 made of steel rods is situated in floor material 2 as well as an empty conduit in which a cable 6 is routed to a charging unit, which is situated in a bore, in particular a stepped bore, introduced into the floor material.

(6) A frame part 4, which is integrally connected to floor material 2 with the aid of casting compound 3, is placed on the step of the recess arranged as a stepped bore.

(7) A receiving part 7, which is made of plastic, is situated in the frame part, and a sheet-metal part 5, which touches both frame part 4 and receiving part 7, is situated between frame part 4 and receiving part 7.

(8) A cover part 8, in which the primary winding is situated, is disposed in receiving part 7.

(9) The primary winding is supplied with an alternating current from an electronic circuit that is also accommodated in receiving part 7 and supplied with electrical power with the aid of cable 6.

(10) The electronic circuit includes a power inverter whose connection on the alternating voltage side feeds a gyrator that feeds the primary winding on the output side and is resonantly adapted to the frequency of the voltage supplied at the connection of the power inverter on the alternating voltage side.

(11) Sheet-metal part 5 is arranged as corrugated sheeting. Sheet metal part 5 surrounds receiving part 7 at its circumference. In the circumferential direction, the region covered by sheet metal part 5 covers the region covered by receiving part 7 in the circumferential direction.

(12) In the same manner, the region axially covered by receiving part 7 overlaps with the region axially covered by sheet metal part 5.

(13) As a result, better heat dissipation of the electronic circuit is achieved because sheet metal part 5 functions as a heat conduction bridge for the heat dissipation.

(14) The cover part may be produced from a non-magnetic material, e.g., plastic or aluminum.

(15) Cover part 5 is disposed so as to be flush with the driving surface so that travel across cover part 5 is possible without hindrance.

(16) Sheet-metal part 5 has corrugations featuring an amplitude, the corrugation length in the circumferential direction covering a circumferential angular range of less than 20, the number of corrugations at the circumference being, for example, greater than eighteen, and the corrugation length in the circumferential direction amounting to 15, in particular. The amplitude of the corrugations may amount to one half of the difference between the greatest radial distance of receiving part 7 and the smallest radial distance of frame part 4.

(17) The sheet-metal part may be produced from aluminum or copper so that high thermal conductivity is provided. As an alternative, cost-effective steel sheeting may be used as well.

LIST OF REFERENCE NUMERALS

(18) 1 coating

(19) 2 floor material

(20) 3 casting compound

(21) 4 frame part

(22) 5 sheet-metal part

(23) 6 cable

(24) 7 receiving part

(25) 8 cover part

(26) 9 empty conduit

(27) 10 reinforcement