Rotor loss in permanent-magnet brushless AC machines

By Kais Atallah, David Howe, P. Mellor, D. Stone. 2000

277 citations recorded by the source corpus.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/1cbe5d1732c7ed2b386fbbcbf3310f228841eaf2

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In Control and Systems Engineering

In Electrical and Electronic Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Eddy-current loss in the rotor magnets of permanent-magnet brushless machines having a fractional number of slots per pole (2005, unknown): “This paper extends the model that was presented in [7] by considering time harmonics in the stator MMF distribution, and proposes a simplified analytical model, with reference to [8]–[11], which assumes that the eddy currents are only induced in the permanent magnets and are resistance limited.”
Optimization of Magnet Segmentation for Reduction of Eddy-Current Losses in Permanent Magnet Synchronous Machine (2010, unknown): “Analytical method for predicting the eddy-current losses in magnets, due to space harmonics of MMF, has been presented in [2]–[4], and used to quantify the efficiency of 1-D (circum-”
An Improved Subdomain Model for Predicting Magnetic Field of Surface-Mounted Permanent Magnet Machines Accounting for Tooth-Tips (2011, methodology): “The 2-D slotless analytical model received extensive applications in the permanent-magnet machines [6]–[10] for predicting electromagnetic performance [11], [12], losses [13]–[15], radial force [16], [17], and unbalanced magnetic force [18], [19] etc.”
Parasitic Effects in PM Machines With Concentrated Windings (2005, background): “The criteria in choosing promising values of the number of slots per pole per phase q have been presented by several authors and can be summarized as follows [1], [2], [6]–[8].”
Winding Configurations and Optimal Stator and Rotor Pole Combination of Flux-Switching PM Brushless AC Machines (2010, background): “However, the rotor eddy current loss, particularly in the rotor magnets, in the conventional fractional-slot PM machines is usually high [13], [14], and their torque density is often limited by the temperature rise of magnets on the rotor due to its relatively poor thermal condition.”
Design of axial-flux permanent-magnet low-speed machines and performance comparison between radial-flux and axial-flux machines (2005, background): “These eddy current loss components are usually neglected since the fundamental air-gap field usually rotates in synchronism with the rotor and the time harmonics in the current waveform and space harmonics in the winding distribution are generally small (Atallah et al., 2000).”
Fractional-Slot Concentrated-Windings Synchronous Permanent Magnet Machines: Opportunities and Challenges (2010, methodology): “In [ 54 ], Atallah et al. presented an analytical model for calculating magnet losses.”
Electrical Machines and Drives for Electric, Hybrid, and Fuel Cell Vehicles (2007, background): “If the eddy-current loss is unacceptable, the magnets may be segmented, axially and/ or circumferentially [ 89 ].”
The Analysis of Losses in High-Power Fault-Tolerant Machines for Aerospace Applications (2006, background): “In an interesting approach adopted in [15]–[17], an analytical solution based upon a similar harmonic approach has been developed.”
Computationally efficient approaches for evaluation of rotor eddy current loss in permanent magnet brushless machines (2009, methodology): “The lower and higher order space harmonics rotating at different speeds to that of the rotor magnets can induce significant eddy currents in the magnets and incur loss [ 5 ].”
Optimal flux weakening in surface PM machines using fractional-slot concentrated windings (2005, background): “In addition, segmentation of the magnets along the air-gap periphery can be very effective in reducing the eddy-current losses [17].”