Circuit for controlling current flow from an A.C. source to a load
US4268779A · kind A · utility
3Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Aug 13, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/681
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for controlling power consumption of a load, by controlling the flow of current thereto, utilizes at least one parallel combination of non-linear resistance elements, such as a varistor and the like, and a gateable semiconductor switching device, such as a triac and the like, to substantially reduce or prevent current flow when the semiconductor switching device is gated to an "off" condition and to enable normal current flow to a load when the semiconductor switching device is gated to an "on" condition. Embodiments of the power circuits for control of magnetron power, in a microwave oven, are illustrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.