Patent · US Active

Ultrasonic motor and vibration detection method for ultrasonic motor

US7759840B2 · kind B2 · utility

5Cited by
2References
2Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 3, 2007
Grant dateJul 20, 2010
Priority date
Expiry dateMay 16, 2028

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH10N30/871
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

When a piezoelectric ceramic sheet is divided into two equal parts in a longitudinal direction and two equal parts in a width direction to form four regions, internal electrodes are disposed over each region and are disposed so that surface areas occupied in each region are substantially the same, and a longitudinal vibration is detected based on a potential difference between the internal electrodes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.