Method and device for short circuit or open load detection
US7280333B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2004 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Nov 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method or apparatus is provided for detecting an error condition associated with a load (RL) or a connection (P) to the load (RL). The load (RL) may comprise an energy storing element (Cext). During a first diagnosis phase, it is determined whether the load (RL) or the connection (P) to the load (RL) is in a normal operation condition or in an error condition. If the load (RL) or the connection (P) to the load (RL) is in an error condition, during a second diagnosis phase it is determined whether the error condition is an open load condition, short circuit condition to ground or a short circuit condition to a power supply. When the load is in a starting state before the first diagnosis phase, the method or apparatus may further comprise carrying out, after the second diagnosis phase, a resetting phase for resetting the load to the starting state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.