DocumentCode :
1266057
Title :
Design Tradeoffs Between Constant Power Speed Range, Uncontrolled Generator Operation, and Rated Current of IPM Motor Drives
Author :
Pellegrino, Gianmario ; Vagati, Alfredo ; Guglielmi, Paolo
Author_Institution :
Politec. di Torino, Turin, Italy
Volume :
47
Issue :
5
fYear :
2011
Firstpage :
1995
Lastpage :
2003
Abstract :
A closed-form approximate formulation is proposed to establish a relationship between the uncontrolled generator (UCG) operation of interior permanent-magnet (IPM) motors at high speed and the constant power speed range (CPSR) and drive current capabilities. High-saliency IPM motors of the PM-assisted synchronous reluctance type are mainly considered in the analysis, since they are proved to have the most favorable ratio between flux weakening capability and UCG voltage. The results of the analysis show the tight relationship between the uncontrolled overvoltage and the CPSR of the drive. Moreover, where the uncontrolled voltage is higher, the relationship between the CPSR and the motor current amplitude becomes stiffer: For small current variations, a large reduction of the speed range can occur. The analysis is validated experimentally on two motors of very different size (500 W and 1 MW).
Keywords :
permanent magnet generators; permanent magnet motors; reluctance motor drives; IPM motor drives; PM-assisted synchronous reluctance type motor; UCG voltage; closed-form approximate formulation; constant power speed range; flux weakening capability; interior permanent-magnet motor; power 1 MW; power 500 W; uncontrolled generator operation; Induction motors; Permanent magnet motors; Reluctance motors; Strontium; Torque; Traction motors; Electric machine design methodology; permanent-magnet (PM) machines; synchronous motor drives; traction motor drives; variable-speed drives;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.2011.2161429
Filename :
5942157
Link To Document :
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