US 12,119,184 B2
Power generator
Yoshihiro Kozawa, Kariya (JP); Noriyuki Matsushita, Kariya (JP); Kazuhiko Kano, Kariya (JP); Yumi Tanaka, Shinjuku-ku (JP); Hiroki Otsuka, Shinjuku-ku (JP); and Yusuke Edano, Shinjuku-ku (JP)
Assigned to DENSO CORPORATION, Kariya (JP); and TOKYO UNIVERSITY OF SCIENCE FOUNDATION, Tokyo (JP)
Filed by DENSO CORPORATION, Kariya (JP); and TOKYO UNIVERSITY OF SCIENCE FOUNDATION, Tokyo (JP)
Filed on Aug. 12, 2022, as Appl. No. 17/886,538.
Application 17/886,538 is a continuation of application No. PCT/JP2021/006746, filed on Feb. 24, 2021.
Claims priority of application No. 2020-032539 (JP), filed on Feb. 28, 2020.
Prior Publication US 2022/0392711 A1, Dec. 8, 2022
Int. Cl. H02N 1/08 (2006.01); H01G 7/02 (2006.01); H02K 35/02 (2006.01); H02N 1/00 (2006.01)
CPC H01G 7/025 (2013.01) [H02N 1/08 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A power generator comprising:
an electret including a first charged surface and a second charged surface, the first and second charged surfaces having opposite polarities,
a first electrode partially formed on the first charged surface such that the first charged surface has a portion as a current collecting surface that is exposed outward,
a second electrode formed on the second charged surface,
a third electrode disposed to face the first charged surface with a space, the third electrode being configured to move relative to, and in parallel to, the first charged surface, and
at least one of a power storage unit or an output unit, wherein
the first electrode and the second electrode form a first power generating unit,
the third electrode and the second electrode form a second power generating unit,
at least one of the power storage unit or the output unit is electrically connected to both the first power generating unit and the second power generating unit, and
the electret is formed by polarizing an electret material that includes an inorganic dielectric having a bandgap energy of 4 eV or more.