US 12,464,949 B2
Piezoelectric actuator drive method, piezoelectric actuator drive circuit, and piezoelectric actuator drive system
Hironobu Abe, Tokyo (JP); Masahiro Sato, Tokyo (JP); and Hiroya Takenaka, Kanagawa (JP)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/776,271
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Oct. 29, 2020, PCT No. PCT/JP2020/040714
§ 371(c)(1), (2) Date May 12, 2022,
PCT Pub. No. WO2021/100438, PCT Pub. Date May 27, 2021.
Claims priority of application No. 2019-208542 (JP), filed on Nov. 19, 2019.
Prior Publication US 2022/0393093 A1, Dec. 8, 2022
Int. Cl. H10N 30/80 (2023.01); B06B 1/06 (2006.01); F04B 43/04 (2006.01)
CPC H10N 30/802 (2023.02) [B06B 1/0644 (2013.01); F04B 43/046 (2013.01); H10N 30/80 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A piezoelectric actuator drive method, the method comprising:
obtaining operation information pertaining to operation of a piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven; and
performing feedback control of a drive parameter for driving the piezoelectric element based on the operation information, wherein
a period from when the force generated by the piezoelectric element is maximum to a point in time of half the drive cycle is the longest period that can be set as the period that is the part.