Title :
PSM drives with fault-tolerant position detection
Author :
Lambeck, Michael ; Schrö, Manfred
Author_Institution :
Inst. of Electr. Drives & Machines, Vienna Univ. of Technol.
Abstract :
Modern drives, especially PSM servo drives, require an exact position information for high precision positioning. This information is usually obtained from a resolver or encoder. If this sensor fails, the drives ceases working although the machine is still fine. For applications where fault-tolerance is more important than high precision, the described combination of an encoder with the INFORM system offers an elegant solution. After an introduction to the INFORM system, the control scheme is presented. It shows how the two position acquisition systems are connected. Test results show the applicabilty of this system
Keywords :
fault tolerance; machine control; permanent magnet motors; sensors; servomotors; synchronous motor drives; INFORM system; INdirect Flux estimations by On-line Reactance Measurement system; PSM servo drives; encoder; fault-tolerant position detection; position acquisition system; position information; precision positioning; resolver; Current measurement; Electrical fault detection; Electrical resistance measurement; Fault detection; Fault tolerance; Permanent magnets; Rotors; Sensorless control; Stators; Time measurement;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-8975-1
DOI :
10.1109/APEC.2005.1453054
