Methods and apparatus for monitoring power flow in a conductor
First Claim
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1. A method of monitoring electrical energy consumed by an electrical load, the method comprising:
- sensing actual current flow in at least one power line which is supplying electrical energy to said load, said at least one power line being further characterized by an actual voltage value associated with said actual current flow;
generating an analog signal indicative of the amount of actual current flow sensed in said at least one power line;
converting said analog signal to a digital representation of said amount of said actual current flow;
providing an assumed voltage value of said at least one power line, wherein said assumed voltage value may be different than said actual voltage value, said assumed voltage comprising an approximation of said actual voltage value; and
calculating at least one measure of power consumption by said electrical load based on said digital representation, said calculating being further based on said assumed voltage value instead of said actual voltage value.
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Abstract
An energy monitoring device includes means for sensing current in a power line and generating an analog signal representative thereof. The energy monitoring device includes means for generating a digital representation of the current. The energy monitoring device includes means for assuming a voltage value and calculating at least one measure of power consumption using the sensed current and the assumed voltage. A method executable by said energy monitoring device is also disclosed.
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Citations
37 Claims
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1. A method of monitoring electrical energy consumed by an electrical load, the method comprising:
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sensing actual current flow in at least one power line which is supplying electrical energy to said load, said at least one power line being further characterized by an actual voltage value associated with said actual current flow;
generating an analog signal indicative of the amount of actual current flow sensed in said at least one power line;
converting said analog signal to a digital representation of said amount of said actual current flow;
providing an assumed voltage value of said at least one power line, wherein said assumed voltage value may be different than said actual voltage value, said assumed voltage comprising an approximation of said actual voltage value; and
calculating at least one measure of power consumption by said electrical load based on said digital representation, said calculating being further based on said assumed voltage value instead of said actual voltage value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A monitoring device for monitoring electrical energy consumed by an electrical load, the monitoring device comprising:
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a current sensor operative to sense actual current flow in at least one power line which is supplying electrical energy to said load, said at least one power line being further characterized by an actual voltage value associated with said actual current flow, said current sensor being further operative to generate an analog signal indicative of the amount of actual current flow sensed in said at least one power line;
an analog to digital converter coupled with said current sensor and operative to convert said analog signal to a digital representation of said amount of said actual current flow;
a input operative to receive an assumed voltage value of said at least one power line, wherein said assumed voltage value may be different than said actual voltage value, said assumed voltage value comprising an approximation of said actual voltage value; and
a processor coupled with said analog to digital converter and said memory and operative to calculate at least one measure of power consumption by said electrical load based on said digital representation, said calculation being further based on said assumed voltage value instead of said actual voltage value. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A monitoring device for monitoring electrical energy consumed by an electrical load, the monitoring device comprising:
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means for sensing actual current flow in at least one power line which is supplying electrical energy to said load, said at least one power line being further characterized by an actual voltage value associated with said actual current flow;
means for generating an analog signal indicative of the amount of actual current flow sensed in said at least one power line;
means for converting said analog signal to a digital representation of said amount of said actual current flow;
means for providing an assumed voltage value of said at least one power line, wherein said assumed voltage value may be different than said actual voltage value, said assumed voltage comprising an approximation of said actual voltage value; and
means for calculating at least one measure of power consumption by said electrical load based on said digital representation, said calculating being further based on said assumed voltage value instead of said actual voltage value. - View Dependent Claims (36, 37)
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Specification