Power control system

Details Power control system Power control system

1984-11-07

1987-01-13

Smith, Jerry

Boots, shoes, and leggings

318345R, G06F 1300

Patent

active

046369350

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.

REFERENCES:
patent: 4427933 (1984-01-01), Wagenor
patent: 4567556 (1986-01-01), Onogi

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