System and method for ripple-free AC power determination
US10197605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Dec 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power metering circuit includes a current input path for receiving an analog current input at a first analog to digital converter; a voltage input path for receiving an analog voltage input at a second analog to digital converter; a multiplier configured to multiply an output of the current input path and the voltage input path; a notch filter configured to receive an output of the multiplier, the notch filter having a stop band based on a line frequency; and a control circuit for setting a sampling frequency of the first analog to digital converter and the second analog to digital converter to a multiple of the line frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.