Title:
POWER GENERATION DEVICE
Document Type and Number:
Japanese Patent JP2021141723
Kind Code:
A
Abstract:
To provide a vibration power generation device capable of generating power with high efficiency as compared with the prior arts.SOLUTION: A power generation device comprises: a nonmagnetic yoke which has rigidity and elasticity, is constituted of a nonmagnetic material which is long in a first direction, includes a support part in the substantial center thereof, and is vibrated by an external force applied to the support part with both ends across the support part defined as free ends; a magnetostrictive element which is constituted of a magnetostrictive material which is long in the first direction, and fixed near a center of one face among faces of the nonmagnetic yoke bent by the vibration, and receives a stress from the nonmagnetic yoke; a coil wound around the magnetostrictive element in the first direction; two magnets respectively disposed in the vicinity of both the ends of the magnetostrictive element, the two magnets being configured to apply magnetic fields to the magnetostrictive element while being disposed in such a manner that an S pole of one of the two magnets is closer to the magnetostrictive element than an N pole and an N pole of the other magnet is closer to the magnetostrictive element than an S pole; and a magnetic yoke which connects the two magnets in such a manner that a magnetic flux passes between the magnetic poles of the two magnets farther from the magnetostrictive element.SELECTED DRAWING: Figure 1
Inventors:
GOKAN MANABU
TANAKA JUNYA
TAKAHASHI YOSHIKO
TANAKA JUNYA
TAKAHASHI YOSHIKO
Application Number:
JP2020038042A
Publication Date:
September 16, 2021
Filing Date:
March 05, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
H02N2/18; H01L41/12
Attorney, Agent or Firm:
Michiko Matsutani
Hiroshi Okabe
Kazuhisa Inaba
Hiroshi Okabe
Kazuhisa Inaba