BICYCLE GENERATOR

The present invention relates to AC electrical machines with a rotary flux-switching member, a stationary armature, and a magnet. The object of the present invention is to provide a bicycle generator of a simplified structure, with reduced manufacture expenses and improved reliability. The bicycle generator according to the present invention (Fig.1) comprises a permanent magnet 1 and an armature with a stationary stacked magnet core, around which a ring winding 2 is wound, the generator having an additional permanent magnet 3 and a rotary flux-switching member 4 with axially directed teeth 5 and 6 located on the both sides thereof with a pitch tau. The teeth 5 located on one side of the flux-switching member 4 are shifted relative to the teeth 6 located on its other side at tau/2. The armature magnet core comprises two packages 7, 8 having a length l, their neighbouring end-faces 9, 10, 11, 12 being relatively shifted at tau/2. The packages 7 and 8 of the magnetic flux path of the armature transversely surround the magnetic flux path of the flux-switching member 4. The end-faces 9 and 10 of the packages 7 and 8 are located opposite to the teeth 5, and the end-faces 11 and 12 are located opposite to the teeth 6. The end-faces 9, 10, 11 and 12 are spaced from the corresponding teeth 5 and 6 at an air-gap clearance delta. The permanent magnets 1 and 3 are placed between the packages 7 and 8 at the both sides of the ring winding 2 so that the N-poles of the magnets 1 and 3 are connected to the package 7 and the S-poles thereof are connected with the package 8. The packages 7 and 8 and winding 2 are intended to be attached to the bicycle frame, while the flux-switching member 4 is intended to be installed on a rotary wheel hub of the bicycle. Izgudrojums attiecas uz maiņstrāvas elektromašīnām ar rotējošu magnētiskās plūsmas sadalītāju ar nekustīgu enkuru un magnētu. Izgudrojuma mērķis ir konstrukcijas vienkāršošana, izgatavošanas tehnoloģijas palētināšana un ģeneratora konstrukcijas drošuma palielināšana. Ģenerators (fig.1) satur pastāvīgo magnētu 1 un enkuru ar nekustīgu šihtētu magnētvadu, ko aptver gredzenveida tinums 2, papildu pastāvīgo magnētu 3 un magnētiskās plūsmas pārslēdzēj