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Title: TRIAC/SCR proportional control circuit

Abstract

A power controller device is disclosed 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. 9 figs.

Inventors:
Issue Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
335475
Patent Number(s):
5,892,391
Application Number:
PAN: 8-923,629
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 240201; PA: EDB-99:045062; SN: 99002077294
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 6 Apr 1999
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; AC SYSTEMS; DESIGN; ELECTRIC POTENTIAL; CONTROL EQUIPMENT; LOGIC CIRCUITS

Citation Formats

Hughes, W.J. TRIAC/SCR proportional control circuit. United States: N. p., 1999. Web.
Hughes, W.J. TRIAC/SCR proportional control circuit. United States.
Hughes, W.J. Tue . "TRIAC/SCR proportional control circuit". United States.
@article{osti_335475,
title = {TRIAC/SCR proportional control circuit},
author = {Hughes, W.J.},
abstractNote = {A power controller device is disclosed 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. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {4}
}