DC Motor drive system
US4268781A · kind A · utility
12Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 11, 1977 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Nov 11, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actual speed N of a DC motor and an armature current Ia are detected to detect the motor output N.times.Ia. The motor speed is changed so that the detected motor output may not exceed a predetermined value. The spark generation of the motor brush is prevented when an over load is applied to the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.