Invention Grant
- Patent Title: Control method for piezoelectric motor and robot
-
Application No.: US17665611Application Date: 2022-02-07
-
Publication No.: US11750117B2Publication Date: 2023-09-05
- Inventor: Tomohisa Iwazaki
- Applicant: SEIKO EPSON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SEIKO EPSON CORPORATION
- Current Assignee: SEIKO EPSON CORPORATION
- Current Assignee Address: JP Tokyo
- Agent Gang Yu
- Priority: JP 21018925 2021.02.09
- Main IPC: H02N2/14
- IPC: H02N2/14 ; H02N2/10 ; B25J9/12

Abstract:
A piezoelectric motor includes a driven member rotating around a rotation axis, and a plurality of piezoelectric vibrators rotating the driven member by transmitting drive forces to the driven member. The plurality of piezoelectric vibrators includes a first piezoelectric vibrator and a second piezoelectric vibrator at a larger distance from the rotation axis than the first piezoelectric vibrator. The control method for the driven member includes, for acceleration of the driven member, rotating the driven member by the drive force of the second piezoelectric vibrator when a rotation velocity of the driven member is lower than a first velocity, and rotating the driven member by the drive force of the first piezoelectric vibrator when the rotation velocity of the driven member is equal to or higher than the first velocity.
Public/Granted literature
- US20220255470A1 CONTROL METHOD FOR PIEZOELECTRIC MOTOR AND ROBOT Public/Granted day:2022-08-11
Information query