Ultrasonic motor driving circuit
US5099180A · kind A · utility
11Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Dec 11, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/0075
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ultrasonic motor driving circuit has a drive duty generating circuit that intermittently outputs a drive request signal according to the battery voltage, and a drive signal output means that receives the drive request signal to output a drive signal. The drive signal is in the form of bursts with pause intervals, the pause intervals being variable with a change in the battery voltage thereby improving utilization of the battery capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.