An electromagnetic energy converter including two plates each having an inner face; a flux variation device arranged between the inner faces, and which includes a first prismatic part, a magnet and a second prismatic part, and is arranged to pivot about an axis between two equilibrium positions, and for which the first and second prismatic parts each come into contact with an inner face; and a coil designed to be crossed by a magnetic flux generated by the magnet and guided by the two plates in a first direction when the device is in one equilibrium position, and in a second direction when said device is in the other equilibrium position.