DE102007036452A1 - Dynamo for lighting unit for producing alternating current, particularly for use in two-wheeler, particularly bicycle, has magnetic field generator for producing magnetic field, for wireless transmission of energy to energy receiver - Google Patents

Abstract

The dynamo (1) has a magnetic field generator (2) for producing a magnetic field for wireless transmission of energy to an energy receiver (5) formed in a headlight (3) or taillight (4). The magnetic field generator is provided with a resonant circuit that has a capacitance, an electrical resistance and an inductance. The resonant circuit is provided with a variable resonant frequency. Independent claims are also included for the following: (1) a method for operating a lighting unit (2) a light, particularly head light or taillight with an energy receiver.

Description

object This invention is a lighting system for vehicles, especially for bicycles, the from a generator, eg. B. a bicycle dynamo, and at least one Light, z. B. a headlight and / or a taillight consists.

lighting systems This type are known and state of the art. In such lighting systems The power generated by the dynamo is usually or double cabling to the lighting components, consuming, z. B. the headlight and / or the tail light out.

Bicycles become always filigree, accessories like z. B. Cable becomes common also for optical reasons integrated into the frame. Another reason for laying cables in the frame is the risk of damage to the exposed cable. The integration into the framework, this risk is largely minimized, but not sure excluded.

ever after, what for a dynamo and where on the bike is used is one of the two lighting components due to the long wiring stronger endangered by a cable break, and there may be a failure of the lighting component. With the current trend towards the hub dynamo, the tail light is more endangered than the headlight.

There The laying of the cable is very complex, regardless of whether these are integrated into the frame or are exposed It is an object of the present invention, the current generated by the dynamo without the use of cables to the appropriate bicycle components forward.

These The object is achieved by a wireless energy transfer realized at the connected in or with the dynamo an energy transmitter is present, which generates a magnetic field of certain frequency and with the energy receiver, the in or on the tail light and / or the headlamp is integrated or attached, corresponds and this set in a resonant vibration. These vibrations can be in electrical energy to be converted.

in the The following will be the device according to the invention with the attached Figure closer explains without being limited to the details and embodiments disclosed therein.

It shows schematically:

1 a bicycle with a dynamo ( 1 ), a magnetic field generator ( 2 ), a headlight ( 3 ), a tail light ( 4 ) and with the energy recipient (s) ( 5 ).

1

dynamo

2

magnetic field generator

3

headlights

4

Taillight

5

energy receiver

Claims (13)

Generator ( 1 ) for generating alternating current, in particular for use on a two-wheeler, comprising at least one magnetic field generator ( 2 ) for generating a magnetic field for the wireless transmission of energy to at least one preferably in a headlight ( 3 ) and / or tail light ( 4 ) trained energy receiver ( 5 ). Generator ( 1 ) according to claim 1 with integrated magnetic field generator ( 2 ). Generator ( 1 ) according to one of the preceding claims, in which the magnetic field generator ( 2 ) comprises at least one resonant circuit, in particular comprising at least one capacitance, at least one electrical resistance and at least one inductance. Generator ( 1 ) according to claim 3, wherein the resonant frequency of the resonant circuit is variable. Lamp ( 3 . 4 ) for a bicycle, in particular headlamps ( 3 ) or taillight ( 4 ) comprising at least one energy receiver ( 5 ) for receiving wirelessly transmitted power. Lamp ( 3 . 4 ) according to claim 5, wherein the energy receiver ( 5 ) comprises at least one resonant circuit, in particular comprising at least one capacitance, at least one electrical resistance and at least one inductance. Lamp ( 3 . 4 ) according to claim 6, wherein the resonant frequency of the resonant circuit is variable. Lamp ( 3 . 4 ) according to one of claims 5 to 7 with integrated energy receiver ( 5 ). Lighting device comprising at least one generator ( 1 ) according to one of claims 1 to 4 and at least one lamp ( 3 . 4 ) according to any one of claims 5 to 8. Lighting device according to Claim 9, in which the magnetic field generator ( 1 ) electromagnetic wave of a transmission frequency and in which the energy receiver ( 5 ) has a resonance frequency corresponding to the transmission frequency. Method for operating a lighting device of a bicycle, in particular a bicycle, in particular according to claim 9 or 10, wherein the lighting device comprises at least one generator ( 1 ), in particular according to one of claims 1 to 4 and at least one luminaire ( 3 . 4 ), in particular at least one tail light ( 4 ) and / or a headlight 3 , in particular according to one of Claims 5 to 8, in which the means for operating the at least one luminaire ( 3 . 4 ) required energy wirelessly from the generator ( 1 ) to the at least one lamp ( 3 . 4 ) is transmitted. The method of claim 11, wherein the wireless power transmission based on electromagnetic waves. A method according to claim 11 or 12, wherein the wireless energy transmission on resonance phenomena based.