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Title: TRIAC/SCR proportional control circuit

Abstract

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.

Inventors:
 [1]
  1. Boston Lake, NY
Issue Date:
Research Org.:
Knolls Atomic Power Lab. (KAPL), Niskayuna, NY (United States)
OSTI Identifier:
872247
Patent Number(s):
5892391
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING
DOE Contract Number:  
AC12-76SN00052
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
triac; proportional; control; circuit; power; controller; device; voltage-to-frequency; converter; conjunction; zero; crossing; detector; linearly; proportionally; supplied; load; output; voltage-to; frequency; controls; reset; input; r-s; flip; flop; set; triggers; monostable; multivibrator; controlling; firing; connected; logic; gates; prevent; direct; triggering; rare; instance; inputs; coincidence; supplemented; loop; providing; compensation; line; voltage; variations; voltage-to-frequency converter; line voltage; zero crossing; control loop; circuit connected; power control; control circuit; power controller; flip flop; frequency converter; logic gate; monostable multivibrator; logic gates; crossing detector; /327/

Citation Formats

Hughes, Wallace J. TRIAC/SCR proportional control circuit. United States: N. p., 1999. Web.
Hughes, Wallace J. TRIAC/SCR proportional control circuit. United States.
Hughes, Wallace J. Fri . "TRIAC/SCR proportional control circuit". United States. https://www.osti.gov/servlets/purl/872247.
@article{osti_872247,
title = {TRIAC/SCR proportional control circuit},
author = {Hughes, Wallace J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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