Patent ID: 11901789
Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electromagnetic device to convert input mechanical energy into output electrical energy, comprising:
a movable element configured to make a vibratory mechanical movement,
a vibration source configured to actuate the vibratory mechanical movement of the movable element,
a coil,
a magnetic circuit passing through said coil, said coil being configured to generate the output electrical energy when said movable element makes the vibratory mechanical movement,
a permanent magnet arranged in the magnetic circuit and configured to generate a total magnetic flux in the magnetic circuit,
wherein the magnetic circuit comprises a first gap and a second gap, said first gap is substantially constant and said second gap is variable as a function of a position of the movable element during the vibratory mechanical movement,
the permanent magnet is arranged at a position in the magnetic circuit so that the total magnetic flux splits into a first magnetic flux through a first portion of the magnetic circuit including the first gap but not the second gap, and a second magnetic flux through a second portion of the magnetic circuit comprising the second gap but not the first gap, the first portion and the second portion being separated and defined by the position of the permanent magnet,
the coil is passed through by only a single portion of the magnetic circuit, the single portion is one of the first portion of the magnetic circuit and the second portion of the magnetic circuit, and
a ratio between the first magnetic flux and the second magnetic flux varies as a function of the position of the movable element.