Fault detection methods for power tools
US12151355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2021 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Dec 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method performed in a control unit of a power tool driven by an electric motor, for detecting a fault state in the power tool, wherein the electric motor is associated with a motor current drawn over a motor interface, the method comprising monitoring a parameter of the electric motor during operation of the power tool, wherein the parameter is indicative of the motor current, obtaining a fault model, wherein the fault model is configured to classify a state of the power tool into a pre-determined number of states comprising one or more fault states, based on a series of electric motor parameter values, classifying a state of the power tool into the pre-determined number of states based on the fault model and on one or more values of the monitored electric motor parameter, and triggering an action by the power tool in case the state of the power tool is classified as a fault state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.