Apparatus for an energy meter
AssigneeNXP B.V.
InventorsMartin Mienkina, Lukas Vaculik
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Abstract
An apparatus for an energy meter comprising: an input configured to receive one or more phases of an electricity supply for metering; an analogue to digital convertor, ADC, configured to sample one of the phases of the one or more phases at a sampling frequency to generate a plurality of samples comprising a digital representation of the one of the one or more phases; a tuning block configured to: determine a phase angle difference between: (i) a first set of the plurality of samples representing a first voltage period of the one of the phases; and (ii) a second set of the plurality of samples representing a second voltage period of the one of the phases; and based on the phase angle difference, control the sampling frequency of the ADC.
Claims15
An apparatus for an energy meter comprising:
- an input configured to receive one or more phases of an electricity supply for metering;
- an analogue to digital convertor (ADC) configured to sample one of the phases of the one or more phases at a sampling frequency to generate a plurality of samples comprising a digital representation of the one of the one or more phases;
- a tuning block configured to:
- determine a phase angle difference between:
- (i) a first set of the plurality of samples representing a first voltage period of the one of the phases;
- and
- (ii) a second set of the plurality of samples representing a second voltage period of the one of the phases;
- and
- based on the phase angle difference, control the sampling frequency of the ADC.
A method for controlling an electricity supply meter comprising:
- receiving a first set of samples representing a first voltage period of one of one or more phases of an electricity supply to be metered, the first set of samples generated by an analogue to digital convertor (ADC) configured to sample at a sampling frequency;
- receiving a second set of samples representing a second voltage period of the one of one or more phases, the second set of samples generated by the ADC configured to sample at the sampling frequency;
- determining a phase angle difference between:
- (i) the first set of samples representing the first voltage period of the one of the phases;
- and
- (ii) the second set of samples representing the second voltage period of the one of the phases;
- and
- controlling the sampling frequency of the ADC based on the phase angle difference.
Dependencies are inferred from the claim text.