Power control system
US4636935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Nov 7, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/917
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A solid state control device is disclosed for controlling power turn-on times to process systems such as heaters used in glassmaking, in petrochemical plants, in furnaces, and for electromotive, and other devices. A command signal from the process control is fed to the device in either parallel digital, serial digital, or in analogue form. The command signal is then converted to a binary signal suitable for controlling a phase delay counter. The phase delay counter receives a high frequency clocking signal and produces a very finely divided half cycle output. This provides a line frequency power control signal which is synchronized with command signal. The counter output is fed to gate drivers that actuate a turn-on device such as an SCR or triac to control the process system within a finely divided time period corresponding to a single time division of each half cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.