Paper Info
Title
Design and Evaluation of a Short-Circuit Rotor-Ring for Enhanced Self-Sensing Capability in a Slotless PM Motor
Abstract
This paper deals with the design and evaluation of a short-circuit rotor-ring for enhanced self-sensing capability in a two-pole slotless permanent-magnet motor. High-frequency rotor anisotropy is enabled by adding a short-circuited rotor-ring. Optimal ring-dimensions are determined by parametric numerical studies. An effective high-frequency saliency of up to 1.8 is demonstrated. The steady-state estimation error is within <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\pm$</tex-math></inline-formula> 2 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula> , practically unaffected by current level (in contrast to slotted self-sensing electrical machinery) due to the large effective air-gap. The proposed observer performs properly also during dynamic load changes. Fall-times from 3000 to 0 r/min in less than 50 ms with negligible overshoot are demonstrated. Also parasitic effects, such as power losses, heating, and torque ripple are analyzed.
Year
DOI
Venue
2020
10.1109/TIE.2019.2921266
IEEE Transactions on Industrial Electronics
Keywords
Field
DocType
Rotors,Permanent magnet motors,Inductance,Magnetic anisotropy,Stator windings,Copper,Permeability
Automotive engineering,Control theory,Self sensing,Short circuit,Rotor (electric),Engineering
Journal
Volume
Issue
ISSN
67
5
0278-0046
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Jonas Millinger100.68
Giacomo Bacco200.34
Virginia Manzolini300.68
O. Wallmark46816.22
Nicola Bianchi5326.19