TRIAC/SCR proportional control circuit

Patent · Fri Jan 01 04:00:00 EST 1999

OSTI ID:872247

Hughes, Wallace J ^[1]

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1. Boston Lake, NY

A power controller device which uses a voltage-to-frequency converter in conjunction with a zero crossing detector to linearly and proportionally control AC power being supplied to a load. The output of the voltage-to frequency converter controls the "reset" input of a R-S flip flop, while an "0" crossing detector controls the "set" input. The output of the flip flop triggers a monostable multivibrator controlling the SCR or TRIAC firing circuit connected to the load. Logic gates prevent the direct triggering of the multivibrator in the rare instance where the "reset" and "set" inputs of the flip flop are in coincidence. The control circuit can be supplemented with a control loop, providing compensation for line voltage variations.

• Research Organization: Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
• DOE Contract Number: AC12-76SN00052
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5892391
• OSTI ID: 872247
• Country of Publication: United States
• Language: English

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zero
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