Modified Vector Control Algorithm for Increasing Partial-Load Efficiency of Fractional-Slot Concentrated-Winding Surface PM Machines

This paper presents a modified vector control algorithm for a fractional-slot concentrated-winding surface permanent magnet (SPM) machine that has been developed to maximize the machine's partial-load efficiency over a wide range of operating conditions. By increasing the amplitude of the negat...

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Veröffentlicht in:IEEE transactions on industry applications Jg. 44; H. 5; S. 1543 - 1551
Hauptverfasser: EL-Refaie, A.M., Jahns, T.M., Reddy, P.B., McKeever, J.W.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.09.2008
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
ALGORITHMS
AMPLITUDES
Analytical models
Concentrated windings
Control theory
COPPER
Core loss
DESIGN
EFFICIENCY
Finite element methods
flux weakening
fractional-slot windings
GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
IRON
Machine vector control
Mathematical analysis
partial-load efficiency
Performance analysis
PERMANENT MAGNETS
permanent-magnet (PM) synchronous machine
Scanning probe microscopy
Stator cores
STATORS
surface PM (SPM) motor
TORQUE
vector control
VECTORS
Vectors (mathematics)
ISSN:0093-9994, 1939-9367
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Zusammenfassung:This paper presents a modified vector control algorithm for a fractional-slot concentrated-winding surface permanent magnet (SPM) machine that has been developed to maximize the machine's partial-load efficiency over a wide range of operating conditions. By increasing the amplitude of the negative d -axis current, the resulting increase in the stator copper losses can be more than offset by the reduction in the iron core losses achieved by lowering the stator d -axis flux amplitude. The effectiveness of this technique has been demonstrated using both analytical models and finite element analysis for a 55-kW (peak) SPM machine design developed for a demanding set of traction drive performance requirements. For this example, the modified control strategy increases the partial-load efficiency at 20% of rated torque by > 6% at 2000 r/min compared to the maximum torque/ampere algorithm, making the machine much more attractive for its intended application.
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DE-AC05-00OR22725
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2008.2002211