Power module for a hollow sensorized roller and associated hollow sensorized roller and roller bearing

A device configured to be mounted in an axial central bore of a hollow sensorized roller, the device comprising:

• a power module housing comprising a body having a first end closed by an end cap and an open second end, the end cap including a first bore and a first bearing mounted in the first bore,
• an adapter configured to connect the power module housing to a sensing module, the adapter comprising a mounting base extending into the open second end of the power module housing, an end portion and a central portion located between the mounting base and the end portion, the adapter having a second bore and a second bearing in the second bore, and
• a power module in the power module housing, the power module comprising an electric generator including a main shaft supported by the first bearing and the second bearing and extending along a longitudinal axis of the power module housing, an eccentric mass fixed to the main shaft, a rotor fixed to the main shaft, and a stator fixed inside the power module housing,
• wherein the stator includes at least one stator coil and a flux guide surrounding the rotor, the flux guide being configured to concentrate and guide a magnetic flux of the rotor through the stator coil,
• wherein a portion of the flux guide is located axially between the rotor and the mounting base, and
• wherein the flux guide is rotationally fixed relative to the housing.