DocumentCode :
2968599
Title :
IPM synchronous machine drive response to a single-phase open circuit fault
Author :
Welchko, Brian A. ; Jahns, Thomas M. ; Hiti, Silva
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Volume :
1
fYear :
2001
fDate :
2001
Firstpage :
421
Abstract :
This paper investigates the steady-state and dynamic response of an interior permanent magnet (IPM) synchronous machine drive to a single-phase open circuit fault. This fault results in rotational electromagnetic asymmetry on both the stator and rotor, making it difficult to analyze using classical dq-transformation techniques. This paper presents a new dq synchronous-frame machine model that is capable of handling this highly asymmetrical fault condition, including the effects of q-axis magnetic saturation. Fault responses with two alternative post-fault control strategies are investigated: (1) opening all of the inverter switches so that the machine behaves as an uncontrolled generator (UCG), with the two unfaulted phases connected to the inverter DC link via the anti-parallel diodes; and (2) shorting the two remaining unfaulted phases together using the inverter switches. Results of this investigation show that the fault response is generally more benign using the UCG control strategy, with significantly lower phase currents and pulsating torque than corresponding values delivered using the phase-shorting strategy
Keywords :
DC-AC power convertors; dynamic response; electrical faults; invertors; machine testing; machine theory; permanent magnet motors; rotors; stators; synchronous motor drives; IPM synchronous machine drive response; anti-parallel diodes; control strategy; dq synchronous-frame machine model; highly asymmetrical fault condition; interior permanent magnet synchronous motor drive; inverter DC link; inverter switches; phase currents; phase-shorting strategy; post-fault control strategies; pulsating torque; q-axis magnetic saturation; rotational electromagnetic asymmetry; rotor; single-phase open circuit fault; stator; uncontrolled generator; Circuit faults; Electromagnetic analysis; Inverters; Magnetic circuits; Permanent magnets; Rotors; Stators; Steady-state; Switches; Synchronous machines;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
Type :
conf
DOI :
10.1109/APEC.2001.911681
Filename :
911681
Link To Document :
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