Electronic volt-square-hour metering method and apparatus

Details Electronic volt-square-hour metering method and apparatus Electronic volt-square-hour metering method and apparatus

1976-12-29

1978-01-03

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

364483, G01R 2106

Patent

active

040669599

ABSTRACT:
An electronic meter for measuring V.sup.2 hr in an electrical system includes a center tapped transformer for deriving two analog signals proportional to a detected voltage in the system with the analog signals being 180.degree. out of phase with respect to one another. A comparator compares a relatively high frequency triangular signal with a selected one of the analog signals with the output of the comparator driving a switch which acts as a multiplier. When a comparison exists the switch couples one of the analog signals to an integrator, and when a comparison does not exist, the switch couples the other analog signal to the integrator. The output of the comparator is a pulse width modulated signal having a time duration which is proportional to the amplitude of the detected voltage in the system, and the signal coupled to the integrator is a chopped analog signal having an amplitude proportional to the amplitude of the voltage in the system and a time duration proportional to the magnitude of the voltage. Accordingly, the integrator integrates a signal which is proportional to V.sup.2. At the output of the integrator a signal is generated which is proportional to V.sup.2 hr. This signal is converted to a pulse train having a frequency proportional to amplitude of the output of the integrator. Offset correction is provided by means of up/down integration averaging wherein the input signal to the comparator is switched each time an output pulse is generated.

REFERENCES:
patent: 3760273 (1973-09-01), Burkett et al.

Affiliated with

Also associated with

Rating

Electronic volt-square-hour metering method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic volt-square-hour metering method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic volt-square-hour metering method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-283119