Method and circuit for protecting power circuits against short circuit and over current faults
US5687049A · kind A · utility
41Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Jan 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5387
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fault protection circuit for protecting IGBT's and other non-latching semiconductor devices in power circuits, for example, power converting/inverting circuits, against phase to phase, phase to earth and shoot through short circuit faults as well as against over current faults. The circuit provides local protection for devices on the high side of such power circuits, and transfers the fault to the low side where it is detected and appropriate control circuitry is activated to latch the fault, thereby avoiding the need for isolcated sensing or feedback to protect the high side devices as well as the complete power circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.