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1. (WO2013145553) VIBRATION POWER GENERATOR

Pub. No.:    WO/2013/145553    International Application No.:    PCT/JP2013/001185
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Thu Feb 28 00:59:59 CET 2013
IPC: H02N 1/08
Applicants: PANASONIC CORPORATION
パナソニック株式会社
Inventors: YAMAKAWA, Takehiko
山川 岳彦
NAKATSUKA, Hiroshi
中塚 宏
ONISHI, Keiji
大西 慶治
Title: VIBRATION POWER GENERATOR
Abstract:
This vibration power generator which converts vibration energy into power is provided with a fixed substrate (101), and a vibrating body (107) that can vibrate with respect to the fixed substrate (101). A fixed electrode piece (103) is disposed on the fixed substrate (101), and an electret electrode piece (109) is disposed on the vibrating body (107), said electret electrode piece facing the fixed electrode piece (103). The vibration power generator generates power due to a capacitance change between the fixed electrode piece (103) and the electret electrode piece (109), said capacitance change being generated due to vibration of the vibrating body (107). Both the end portions (401) of the electret electrode piece (109), said both end portions being in the vibration direction of the electret electrode piece, have higher average charge density per unit area compared with that of a middle portion (402) of the electret electrode piece (109), said middle portion being in the vibration direction of the electret electrode piece.