# US 11,029,343 B2 · System and method for ground fault detection using hall effect sensors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,343 B2 - Document ID: US11029343B2 - Status: Granted - Kind: B2 - Application number: 16/262,023 - Filed: 2019-01-30 - Published: 2020-07-30 - Granted: 2021-06-08 - Earliest claimed: 2019-01-30 - Assignees: Koninklijke Fabriek Inventum B.V. - Applicants: Koninklijke Fabriek Inventum B.V. - Inventors: Manuel Perez Camacho; Dennis Mulders - Web page: https://patentgrep.com/patent/US11029343B2 ## CPC - G01R 15/202: {using Hall-effect devices (Hall elements in arrangements for measuring electrical power G01R21/08)} - G01R 31/52: Testing for short-circuits, leakage current or ground faults - G01R 31/50: Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections (testing of sparking plugs H01T13/58) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract A system for current measurement and ground fault detection is disclosed. In embodiments, the system includes a plurality of Hall Effect sensors configured to detect phase currents associated with at least one portion of a multi-phase system. The system further includes a plurality of phase current measurement circuits and a ground fault detection circuit connected to the Hall Effect sensors. The phase current measurement circuits are configured to measure the phase currents detected by the Hall Effect sensors, and the ground fault detection circuit is configured to measure a summation of the phase currents detected by the Hall Effect sensors. ## Claims ### Claim 1 A system for current measurement and ground fault detection, comprising: a plurality of Hall Effect sensors configured to detect phase currents associated with at least one portion of a multi-phase system; a plurality of phase current measurement circuits connected to the Hall Effect sensors and configured to measure the phase currents detected by the Hall Effect sensors; and a ground fault detection circuit connected to the Hall Effect sensors and configured to measure a summation of the phase currents detected by the Hall Effect sensors, wherein each of the phase current measurement circuits includes an operational amplifier configured to receive a current sense signal from a respective one of the Hall Effect sensors, wherein each of the phase current measurement circuits further includes an active rectifier and a low pass filter in series with the operational amplifier. ### Claim 2 (depends on 1) The system of claim 1, wherein the multi-phase system is a three-phase system. ### Claim 3 (depends on 1) The system of claim 1, wherein each of the phase current measurement circuits further includes a buffer amplifier configured to amplify an output signal from the low pass filter before the output signal is fed into a controller. ### Claim 4 (depends on 1) The system of claim 1, wherein the ground fault detection circuit includes a summation amplifier configured to receive current sense signals from the Hall Effect sensors and aggregate the current sense signals. ### Claim 5 (depends on 4) The system of claim 4, wherein the ground fault detection circuit further includes an active rectifier and a low pass filter in series with the summation amplifier. ### Claim 6 (depends on 5) The system of claim 5, wherein the ground fault detection circuit further includes a buffer amplifier configured to amplify an output signal from the low pass filter before the output signal is fed into a controller. ### Claim 7 (depends on 1) The system of claim 1, wherein the Hall Effect sensors comprise surface-mount technology (SMT) or surface-mount device (SMD) sensor packages. ### Claim 8 A device, comprising: one or more components; a multi-phase system configured to furnish electrical power to the one or more components; a plurality of Hall Effect sensors configured to detect phase currents associated with at least one portion of the multi-phase system; a plurality of phase current measurement circuits connected to the Hall Effect sensors and configured to measure the phase currents detected by the Hall Effect sensors; and a ground fault detection circuit connected to the Hall Effect sensors and configured to measure a summation of the phase currents detected by the Hall Effect sensors, wherein each of the phase current measurement circuits includes an operational amplifier configured to receive a current sense signal from a respective one of the Hall Effect sensors, wherein each of the phase current measurement circuits further includes an active rectifier and a low pass filter in series with the operational amplifier. ### Claim 9 (depends on 8) The device of claim 8, wherein the multi-phase system is a three-phase system. ### Claim 10 (depends on 8) The device of claim 8, wherein each of the phase current measurement circuits further includes a buffer amplifier configured to amplify an output signal from the low pass filter before the output signal is fed into a controller. ### Claim 11 (depends on 8) The device of claim 8, wherein the ground fault detection circuit includes a summation amplifier configured to aggregate current sense signals received from the Hall Effect sensors. ### Claim 12 (depends on 11) The device of claim 11, wherein the ground fault detection circuit further includes an active rectifier and a low pass filter in series with the summation amplifier. ### Claim 13 (depends on 12) The device of claim 12, wherein the ground fault detection circuit further includes a buffer amplifier configured to amplify an output signal from the low pass filter before the output signal is fed into a controller. ### Claim 14 (depends on 8) The device of claim 8, wherein the Hall Effect sensors comprise surface-mount technology (SMT) or surface-mount device (SMD) sensor packages. ### Claim 15 (depends on 8) The device of claim 8, wherein the device is an oven, and the one or more components comprise one or more heating elements. ### Claim 16 A method of current measurement and ground fault detection, comprising: detecting phase currents with a plurality of Hall Effect sensors; measuring the phase currents detected by the Hall Effect sensors with a plurality of phase current measurement circuits; and measuring a summation of the phase currents detected by the Hall Effect sensors with a ground fault detection circuit, wherein each of the phase current measurement circuits includes an operational amplifier configured to receive a current sense signal from a respective one of the Hall Effect sensors, wherein each of the phase current measurement circuits further includes an active rectifier and a low pass filter in series with the operational amplifier.