| 摘要 |
The invention relates to a braking and current generating device for bicycles which has at least one current consumer, especially a light and/or at least one battery. The inventive device comprises a rim (10) which serves as a rotor and which is fitted with permanent magnets (12, 14), and comprises electric coils (30) which serve as a stator and which are arranged on a support. The permanent magnets (12, 14) of the rim (10) and the coils (30) of the support are congruently arranged when the rotor is located at a corresponding position. A replaceable coil unit (24) is provided on the side of the rim (10) and is comprised of a supporting plate (28) that conducts magnetism well, and which contains at least three orthogonally protruding coils (30). The coils (30) which are placed side by side according to the U-core principle generate an optimally alternating N-S/S-N magnetic field from each coil to the adjacent coil(s) due to the provision of a winding direction (y) which runs opposite in a preferably alternating manner. The coil unit (24) situated on the side facing away from the supporting plate (28) is at least partially provided with a mechanically effective brake lining (36). |
