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 18:
19. An electromagnetic device for converting 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 the coil, the coil being configured to generate the output electrical energy when the 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 the second gap is variable as a function of a position of the movable element during the vibratory mechanical movement,
the permanent magnet is arranged in the magnetic circuit so that the total magnetic flux splits into a first magnetic flux through a first portion of the magnetic circuit comprising the first gap and a second magnetic flux through a second portion of the magnetic circuit comprising the second gap,
the coil is passed through by 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,
a ratio between the first magnetic flux and the second magnetic flux varies as a function of the position of the movable element;
wherein the movable element comprises a first leg integrated into the magnetic circuit, and
wherein the magnetic circuit comprises a second leg, and the device comprises a link joining the first leg to the second leg.