Motor drive and method for monitoring operational measurement data of a electric motor having at least one operating point

Abstract

The invention relates to a motor drive for monitoring operational measurement data () of an electric motor () having at least one operating point (), wherein the electric motor () is configured to drive a load (), the motor drive () comprising a measurement unit () for acquiring initial measurement data () for at least one of the operating points () of the electric motor (), wherein the initial measurement data comprises sensor data and/or estimated data; a processing unit () for determining a baseline () from the initial measurement data () for the at least one operating point (); an output unit (); characterized in that the processing unit () is configured to generate at least one threshold level () for the at least one determined baseline (), while the electric motor () is on an on state or an off state; wherein the at least one threshold level () defines a level of deviation from the determined baseline (), wherein the output unit () is configured to provide the at least one threshold level () resulting in conditions for monitoring the operational measurement data () of the electric motor (). The invention provides an improved motor drive () for monitoring operational measurement data () of a electric motor () that are more accurate than in the prior art.