公开(公告)号：US20240049604A1

公开(公告)日：2024-02-08

申请号：US18222180

申请日：2023-07-14

Applicant: STMicroelectronics S.r.l. ,  Politecnico Di Milano

Inventor： Marco ZAMPROGNO ,  Raffaele Enrico FURCERI ,  Matteo GIANOLLO ,  Giacomo LANGFELDER

IPC: H10N30/80 ,  H02M3/158 ,  H02J7/00 ,  H02N2/06

CPC classification number: H10N30/802 ,  H02M3/158 ,  H02J7/0068 ,  H02N2/06

Abstract: A differential piezoelectric actuator-system includes an inductor and driver-circuit having switches for transferring energy between first and second actuators and the inductor, and between a voltage-supply node and the inductor. Control circuitry determines whether a next phase in which to operate the driver-circuit is a first charging-phase or a first recovery-phase. The first charging-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the voltage supply node to the inductor; and a third sub-phase to transfer energy from the inductor to the second actuator. The first recovery-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the inductor to the voltage supply node; and a third sub-phase to transfer energy from the inductor to the second actuator.

公开(公告)号：US20240049603A1

公开(公告)日：2024-02-08

申请号：US17879066

申请日：2022-08-02

Applicant: STMicroelectronics S.r.l. ,  Politecnico Di Milano

Inventor： Marco ZAMPROGNO ,  Raffaele Enrico FURCERI ,  Matteo GIANOLLO ,  Giacomo LANGFELDER

IPC: H01L41/04 ,  H02N2/06 ,  H02M3/158

CPC classification number: H01L41/042 ,  H02N2/06 ,  H02M3/158

Abstract: A differential piezoelectric actuator-system includes an inductor and driver-circuit having switches for transferring energy between first and second actuators and the inductor, and between a voltage-supply node and the inductor. Control circuitry determines whether a next phase in which to operate the driver-circuit is a first charging-phase or a first recovery-phase. The first charging-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the voltage supply node to the inductor; and a third sub-phase to transfer energy from the inductor to the second actuator. The first recovery-phase includes operating the switches in: a first sub-phase to transfer energy from the first actuator to the inductor; a second sub-phase to transfer energy from the inductor to the second actuator; and a third sub-phase to transfer energy from the inductor to the voltage supply node.