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):
- 5892391
- Application Number:
- PAN: 8-923,629
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- 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}
}