Power supply module for providing supply voltage to electromotor in drive system that is utilized for operating machine, has computing unit for performing analysis process that comprises harmonic analysis process to determine harmonics

摘要

The module (100) has input terminals (101) for attaching the module to lines (L1-L3). A power converter circuitry (102) is operated as a rectifier to convert net alternating voltage (U0) at the input terminals into a direct voltage (U1) and output the converted direct voltage at output terminals (104). A detecting unit (106) is connected with the input terminals and detects a time gradient of the alternating voltage. A computing unit (103) performs a stress analysis process based on the detected gradient, where the analysis process comprises a harmonic analysis process to determine harmonics. An independent claim is also included for a converter arrangement.