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 PM 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,...

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Bibliographic Details
Published in:Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting Vol. 1; pp. 50 - 57
Main Authors: EL-Refaie, A.M., Jahns, T.M., McKeever, J.W.
Format: Conference Proceeding
Language:English
Published: IEEE 01.10.2006
Subjects:
Analytical models
concentrated windings
Copper
Core loss
Finite element methods
flux weakening
fractional-slot windings
Iron
Machine vector control
Machine windings
partial-load efficiency
Performance analysis
permanent magnet synchronous machine
Stator cores
surface PM motor
Torque control
vector control
ISBN:9781424403646, 1424403642
ISSN:0197-2618
Online Access:Get full text
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Summary:This paper presents a modified vector control algorithm for a fractional-slot concentrated-winding surface PM 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 (FEA) for a 55 kW (peak) surface PM 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 rpm compared to the maximum torque/amp algorithm, making the machine much more attractive for its intended application
ISBN:9781424403646
1424403642
ISSN:0197-2618
DOI:10.1109/IAS.2006.256519