Monolithic solid state power controller
US4174496A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Aug 2, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/0935
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A monolithic solid state power controller generally comprises a power supply, zero voltage crossing detector, operator interface circuitry, current sensing and trip timing logic (having zero current detection capability), drive circuitry, and a power switch. The current sensing and trip timing logic functions are implemented in a monolithic device which provides flexible mode of operation of the switch, operator command validation, status and mode indication, drive enablement in synchronization with zero voltage crossing of the source voltage, and tripout operation in synchronization with zero current crossing in the load current. Both fast trip (in response to catastrophic overcurrent) and timed trip (in response to overcurrent conditions occurring over a period of time) capabilities are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.