Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1974-05-30
1976-03-30
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
G01R 700, G01R 1132
Patent
active
039477630
ABSTRACT:
Metering kWh in an electrical system is accomplished by generating pairs of analog signals, representing current and voltage variables. Each pair of analog signals is multiplied together in a direct pulse-width conversion in a time-division multiplier network. A constant amplitude triangular generator is associated with the multiplier and the multiplier is implemented using C-MOS technology. A separate direct pulse-width multiplier network is provided for multiplying without introducing any phase shift each of the pairs of analog signals to form a series of width and amplitude-modulated pulse signals. The series of modulated pulse signals is converted in, for example, a low-pass filter to a signal having an amplitude representative of average power. For polyphase systems, the signals delivered from each of the multiplier channels are summed at the low-pass filter. An analog-to-pulse rate converter is used for converting the signal representing average power to another series of output pulse signals having a variable signal repetition rate proportional to average power, each output pulse signal representing a quantized amount of electrical energy. A stepping switch and register perform conventional accumulation, storage and display functions in response to the series of output pulse signals delivered thereto.
REFERENCES:
patent: 3500200 (1970-03-01), Woodhead
patent: 3510772 (1970-05-01), Luthi
patent: 3525042 (1970-08-01), Nunlist et al.
patent: 3794917 (1974-02-01), Martin et al.
patent: 3818340 (1974-06-01), Yamaguchi
Friedl et al., "Portable Electronic Watthour Meter," Standard, Published Versions of Lectures Given During the Sept. 1972, IEE Metering Conference in London, England, Paper No. 117.
General Electric Company
Krawczewicz Stanley T.
Myles Vale P.
LandOfFree
C-MOS electronic kWh meter and method for metering electrical en does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with C-MOS electronic kWh meter and method for metering electrical en, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and C-MOS electronic kWh meter and method for metering electrical en will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-523845