G - Physics – 01 – R
Patent
G - Physics
01
R
324/70
G01R 11/32 (2006.01) G01R 21/00 (2006.01) G01R 21/133 (2006.01)
Patent
CA 1186740
ELECTRONIC WATT AND WATTHOUR METER HAVING ANALOG AND DIGITAL OUTPUTS WITH AUTOMATIC ERROR CORRECTION ABSTRACT OF THE DISCLOSURE An improved solid state semiconductor electronic combined watthour and watt meter circuit providing both analog and digital outputs and having automatic error correction comprising first and second input transformers for developing first and second signals proportional respectively to the voltage and current being supplied from a source of electrical energy to a consumer. The first and second signals are supplied to a multiplier circuit for developing pulse-width-modulated and amplitude modulated product output signals representative of instantaneous watts. This product signal is supplied to a summing analog to-pulse rate circuit for developing an output pulse train wherein each output pulse represents a predetermined quantized amount of energy and which is used to reverse polarity of the multiplier switches to accomplish automatic error correction. Additional polarity reversing switches are included in the multiplier switching circuits for developing a second analog output signal representative of the total watts being consumed at a given time.
416929
Company General Electric
Eckersley Raymond A.
LandOfFree
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