POWER GENERATOR

To provide a power generator capable of increasing a power generation amount by suppressing magnetic field distribution in a magnetostrictor.SOLUTION: A power generator comprises: a vibrating plate that extends in a first direction and includes a free end; a tabular magnetostrictor that extends in the first direction, is provided on one surface of the vibrating plate, and is made from magnetostrictive material; a coil provided around the magnetostrictor; a frame that has one end connected to the vibrating plate's one end on the opposite side to the free end and the other end connected to a vibration source and is made from non-magnetic material; a first magnet and a second magnet that apply magnetic fields to the magnetostrictor from directions along a plane crossing the first direction; and a magnetic plate which is disposed on the frame and on which the first magnet and the second magnet are mounted. The first magnet and the second magnet are disposed on the magnetic plate apart from each other along a second direction crossing the first direction so as to be substantially axially symmetric with respect to an axis of the coil. The first magnet's polarity on the magnetic plate side and the second magnet's polarity on the magnetic plate side are opposite to each other.SELECTED DRAWING: Figure 1A 【課題】磁歪素子内の磁界分布を低減し、発電量を向上させることができる発電装置を提供する。【解決手段】発電装置は、第１の方向に延在し、自由端を有する振動板と、第１の方向に延在し、振動板の一方の面に設けられた磁歪材料からなる板状の磁歪素子と、磁歪素子の周囲に設けられたコイルと、一端が振動板の自由端と反対側の一端と接続され、他端が振動源と接続されている非磁性体からなるフレームと、第１の方向と交差する面に沿った方向から磁歪素子に磁界を印加する第一の磁石および第二の磁石と、フレーム上に配置され、第一の磁石と第二の磁石とを搭載する磁性板と、を備え、第一の磁石と第二の磁石とは、コイルの軸に対して、略線対称になるように、第１の方向と交差する第２の方向に沿って互いに離間して磁性板上に配置されており、さらに第一の磁石の磁性板側の極性と、第二の磁石の磁性板側の極性とが、互いに反対である。【選択図】図１Ａ