DocumentCode :
1348934
Title :
Surface permanent magnet synchronous machine position estimation at low speed using eddy-current-reflected asymmetric resistance
Author :
Yang, Shih-Chin ; Lorenz, Robert D.
Author_Institution :
Wisconsin Electr. Machines & Power Electron. Consortium, Univ. of Wisconsin, Madison, WI, USA
Volume :
27
Issue :
5
fYear :
2012
fDate :
5/1/2012 12:00:00 AM
Firstpage :
2595
Lastpage :
2604
Abstract :
This paper proposes an alternative position estimation method of surface permanent magnet (SPM) machines at low speed using high frequency (HF) voltage injection. SPM machines traditionally do not have enough spatial saliency signals because of their symmetric rotors. The proposed solution is to track the HF eddy-current-reflected asymmetric resistance for position estimation. It is shown that the spatial variation of resistance can be enhanced when an HF voltage is superimposed. Finite element analysis is performed to investigate the asymmetric resistance in different SPM machines. By superimposing a d-axis pulsating vector HF voltage, SPM machines can achieve the position estimation performance with reduced degradation at high load conditions. Implementation methods are developed to track the resistance-based saliency signal for speed and position closed-loop control. An SPM machine prototype with a ring magnet rotor is used for the experimental evaluation.
Keywords :
angular velocity control; closed loop systems; eddy currents; electric resistance; finite element analysis; permanent magnet machines; position control; sensorless machine control; synchronous machines; HF eddy-current-reflected asymmetric resistance; SPM machine prototype; d-axis pulsating vector HF voltage; finite element analysis; high frequency voltage injection; high load condition; position closed-loop control; resistance-based spatial saliency signal; ring magnet rotor; speed control; surface permanent magnet synchronous machine position estimation; symmetric rotor; Eddy currents; Estimation; Resistance; Rotors; Stator windings; Motion control and permanent magnet motor; self-sensing machine; sensorless control;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2011.2171507
Filename :
6043911
Link To Document :
بازگشت