Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1987-10-14
1988-09-27
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324130, 364483, 36457101, G01R 2106, G01R 1116
Patent
active
047744570
ABSTRACT:
An electric power measuring device wherein input analogue signals representative of instantaneous values of current and voltage are applied to a multiplier (23) and the resulting product signal is applied to a converter (35, 37, 41, 43, 45, 47) to provide a pulse output signal having a pulse rate representative of the product, and hence of the level of power consumption. The converter is of the kind including a capacitor (35) which is charged during successive periods of equal duration by the product signal and a much larger reference signal which reverses at the end of each capacitor charging period until the capacitor charge does not reverse in polarity during a charging period, so that reversal of charge on the capacitor is assured during the next charging period, whereafter the direction of the reference signal is again reversed at the end of each charging period. The reference signal is constituted by a bias signal component in the output of the multiplier to avoid errors in the converter output pulse rate due to spurious variations in the output of the multiplier.
REFERENCES:
patent: 3875508 (1975-04-01), Milkovic
patent: 4315212 (1982-02-01), Gamoh
patent: 4359684 (1982-11-01), Ley
patent: 4485343 (1984-11-01), Milkovic
patent: 4495463 (1985-01-01), Milkovic
patent: 4500973 (1985-02-01), Ley
patent: 4514686 (1985-04-01), Mayfield
patent: 4535287 (1985-08-01), Milkovic
patent: 4733171 (1988-03-01), Milkovic
Dunn Trevor R.
Joyce Timothy R.
Lucas David R. S.
North Ben B.
Karlsen Ernest F.
The General Electric Company p.l.c.
LandOfFree
Electric power measuring devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric power measuring devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric power measuring devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2399493