Alternating current power control circuit
US4314197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1979 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Mar 29, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit for controlling the application of alternating current power to an apparatus provides a triac having a pair of main terminals adapted for being coupled in series between the apparatus and a source of alternating current power, the triac also having a gate terminal, nonregulated direct current power supply adapted to receive alternating current power from the source thereof, the power supply including a rectifier and a filter and having a pair of output terminals for distributing direct current power, circuitry for maintaining an approximately constant load on the nonregulated direct current power supply and for switching current therefrom to the triac gate terminal including a semiconductor junction switch having a gate terminal, a first main terminal coupled to one output terminal of the power supply and the triac gate terminal and a second main terminal coupled to the other output terminal of the power supply, and circuitry coupled to the switch gate terminal for activating and deactivating current flow in the switch to deactivate and activate, respectively, current flow through the triac by shunting current from the one terminal of the power supply away from the triac …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.