ELECTRICAL DRIVE SYSTEM WITH INDEPENDENT DIAGNOSTICS

An electrical drive system (10) comprising an inverter (22) and an electrical machine (16) supplied by the inverter (22). A method for controlling the electrical drive system (10) comprises: receiving a machine current signal (30) and a machine voltage signal (40) of a machine current supplied to th...

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Bibliographische Detailangaben
Hauptverfasser:	HAVANTO, Petri, KALLIO, Janne
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GENERATION MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING
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Beschreibung
Zusammenfassung:	An electrical drive system (10) comprising an inverter (22) and an electrical machine (16) supplied by the inverter (22). A method for controlling the electrical drive system (10) comprises: receiving a machine current signal (30) and a machine voltage signal (40) of a machine current supplied to the electrical machine (16); determining a switching signal (36) based on the machine current signal (30) and controlling the inverter (22) with the switching signal (36); estimating a first speed estimate (38) from the machine current signal (30); estimating a second speed estimate (42) from the machine voltage signal (40); and comparing the first speed estimate (38) and the second speed estimate (42) with each other, and, when the first speed estimate (38) and the second speed estimate (42) deviate from each other more than a threshold, activating a fault reaction of the electrical drive system (10), which sets the electrical drive system (10) to a predefined state.