Communications: electrical – Systems – Selsyn type
Patent
1997-11-07
1999-08-03
Hofsass, Jeffery A.
Communications: electrical
Systems
Selsyn type
34031002, 34031004, 34031007, H04M 1104
Patent
active
059330724
ABSTRACT:
A method of controlling the current level of an inbound signal (Si) used in a TWACS (two-way communication system) for an electrical distribution system. The inbound signal conveys operational information and data on the performance of the system. The method includes first measuring the current (I) of the inbound signal. This current measurement is performed for each of a predetermined number of successive inbound signals. The root mean square (RMS) value of the measured currents is then determined. Operation of a solid state device (SCR) used to generate the inbound signal is now controlled as a function of the root mean square value. A line current propagating through the electrical distribution system is now modulated with the inbound signal. The inbound signal occurs at a predetermined range of angles (X) within a line voltage cycle regardless of variations in the line voltage characteristics. This enables the inbound signal to be readily detected.
REFERENCES:
patent: 3938129 (1976-02-01), Smither
patent: 4021797 (1977-05-01), Hofmeister
patent: 4914418 (1990-04-01), Mak et al.
patent: 4996513 (1991-02-01), Mak et al.
patent: 5262755 (1993-11-01), Mak et al.
Distribution Control Systems, Inc.
Hofsass Jeffery A.
Tweel , Jr. John
LandOfFree
Current level control for TWACS inbound communications does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current level control for TWACS inbound communications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current level control for TWACS inbound communications will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-853241