Dynamic protection circuit for a motor type load
US5867357A · kind A · utility
5Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0851
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An express down vehicle window lift motor drive system in which an overcurrent detection circuit (10) interprets the flow of electrical power to the lift motor when the motor current exceeds a threshold which is set dynamically as a function of motor in-rush or peak current. Motor current is measured as a small voltage drop across a current shunt. When the current level rises above the dynamically set threshold energization of the motor is halted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.