A power generator assembly supplying electronic (sensors, wireless transmitter) mounted at 16c includes a rotating part 16a and a non-rotating part 16b, the rotating part including multiple generator units 18a-18d, each unit including coil 20, two permanent magnets 22a, 22b and respective pole shoes/pole surfaces 24a-24b facing radially outward, the non-rotating part 16b including an arc-shaped ferromagnetic saddle adaptor 26 arranged with a radial distance to the pole surfaces 24a-24b, configured to close a magnetic circuit passing via the pole shoes 22a-22b through the coil in a rotational position where the saddle adaptor 26 overlaps with the pole shoes 22a-22b. The rotating part 16a further comprises at least one additional permanent magnet 28a-28b arranged in proximity to one of said pole shoes of one of said multiple generator units 18a-18d, wherein the at least one additional permanent magnet 28a-28b is configured to avoid magnetic flux leakage and/or cross talk between magnetic flux circuits pertaining to adjacent generator units 18a-18d in the magnetic open position. In the magnetic closed position, fig 3a (not shown), the distance between magnetic poles 28a-28b and the saddle adaptor is greater than that of the poles 22a-28b avoiding flux loss to the poles 28a-28b.
Power generator assembly for rotating applications
2016-08-17
Patent
Electronic Resource
English