NDLI: Performance comparison of sinusoidally-fed PM BLDC motors having different rotor topologies

Content Provider	IEEE Xplore Digital Library
Author	Vakil, G.I. Rajagopal, K.R.
Copyright Year	2010
Description	Author affiliation: Department of Electrical Engineering, Indian Institute of Technology Delhi, New Delhi-110016, India (Vakil, G.I.; Rajagopal, K.R.)
Abstract	Sinusoidally-fed permanent magnet brushless dc (PM BLDC) motors are supposed to develop effectively ripplefree dynamic torques. This is done by having a sinusoidal flux density distribution in the airgap followed by a rotor position dependent sinusoidal excitation of the phase windings. There are different rotor topologies used in these motors. In this paper, five types of generally used rotor topologies are considered with the same volumes of the permanent magnet materials and rotor core laminations, and the performance of the motors for the same stator geometry and winding excitations are compared. It is observed that the bread-loaf rotor topology gives better performance in terms of the developed torque, torque ripples, cogging torque, and near-sinusoidal back-EMF profile. Also, the motor performance is compared for various operating load angles and it is observed that in general, the optimum load angle for all these rotor topologies will be in the vicinity of 60° (electrical), which provides minimum torque ripple and minimum distortion in back-EMF waveform.
Starting Page	1
Ending Page	5
File Size	414066
Page Count	5
File Format	PDF
ISBN	9781424477821
e-ISBN	9781424477814
DOI	10.1109/PEDES.2010.5712565
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-20
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rotors Topology Torque Harmonic analysis Permanent magnet motors Synchronous motors Magnetic cores Servomotor Electric Vehicle FE Analysis Motor Motor Design PM BLDC Motor PMSM Rotor Topologies
Content Type	Text
Resource Type	Article

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