Solid state replacement for a mechanical relay
US4007378A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1975 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | May 23, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/136
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A direct replacement for mechanical relays without requirement for modification of associated circuitry and circuit connections. A standard relay base having a standard relay pin configuration is utilized for mating with a standard relay socket connected to the associated circuit. A control circuit is mounted on the base and connected to the relay pins and the base. A cover is provided which fits over the base and contains the control circuit. The cover has externally accessible cover terminals mounted therein connected to the control circuit. A remote heat sink is provided for mounting remotely from the relay base and socket for carrying a solid state triac device having a gate and first and second main terminals connected by electrical conductors to the cover terminals. The control circuit is configured to receive a command input signal and a power input signal. The command input signal enables the control circuit, so that the power input signal provides a trigger output coupled to the triac gate. In this fashion, the command input signal controls current between the first and second main terminals of the triac when a load voltage is impressed thereacross.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.