Electronic control device for a direct current electric motor having two supply terminals for a drive system operating in back-and-forth mode, and the application of such a device to a vehicle screen wiping system
US5512807A · kind A · utility
0Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive motor for a motor vehicle screen wiping apparatus operates with repeated reversals of its direction of rotation, and is controlled by a control circuit which is connected to a transistor arranged in the power supply path for the motor, in series with it. The transistor is put into conduction at a time, and in a manner, such as to reduce the audible noise caused by the repeated reversals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.