Patent ID: 9184642
Filing Date: 2015-11-10
Classification: H02K,H02P

Abstract:
1. A system for harvesting energy comprising: an electrical machine including a first structure and a second structure, movable with respect to each other, the first structure being a stator and the second structure being a rotor, the first structure being configured to be constrained to a rotating or rotating and translating element, so as to be driven in rotation by the rotating or rotating and translating element; a counterweight coupled to the second structure so that the second structure is subject to a first gravitational torque; a power transfer structure, electrically connected to the first structure, configured to be connected to a load and adapted to transfer electrical power from the first structure to the load, in an electrically controllable manner, the electrical power transfer causing the application of a second torque on the second structure, the module of which is a function of the electrical power transferred, the second torque being balanced, when the counterweight is in an angular stability region, by the first gravitational torque so as to cause the generation of an electrical voltage in the first structure; an angular position sensor constrained to the second structure and configured to provide a position signal ({right arrow over (ε)}(t)) indicating the angular position of the counterweight, the angular position being referred to a local reference system fixed to the second structure; and an accelerometer constrained with respect to the first structure and configured to provide an acceleration signal ({right arrow over (a)}(t)) indicating an acceleration which affects the first structure, the acceleration being referred to the local reference system; a control unit, having;