DocumentCode :
1166079
Title :
A novel, robust DSP-based indirect rotor position estimation for permanent magnet AC motors without rotor saliency
Author :
Ying, Li ; Ertugrul, Nesimi
Author_Institution :
Dept. of Electr. & Electron. Eng., Adelaide Univ., SA, Australia
Volume :
18
Issue :
2
fYear :
2003
fDate :
3/1/2003 12:00:00 AM
Firstpage :
539
Lastpage :
546
Abstract :
This paper proposes and implements a novel rotor position sensorless technique for PM AC motor drives, which allows acceleration from standstill and can operate under various practical operating conditions including transient speed changes. The technique developed here relies on the measurement of the phase voltages and currents of the motor. It uses the incremental values of flux linkage, and the back-EMF functions to estimate incremental rotor position. Using a phase-locked loop (PLL) algorithm, an internal closed-loop correction algorithm can correct rotor position estimation drift, which may be due to the motor parameter variations or measurement inaccuracies. The method is implemented in closed-loop using a digital signal processor (DSP), and details of the implementation are provided in the paper. To demonstrate accuracy, robustness and reliability of the position estimation scheme, the paper presents a number of real-time experimental results, including dynamic operating conditions.
Keywords :
AC motors; closed loop systems; control system synthesis; digital control; digital signal processing chips; machine testing; machine theory; machine vector control; parameter estimation; permanent magnet motors; phase locked loops; position control; power engineering computing; robust control; rotors; acceleration; accuracy; back-ENIF functions; digital signal processor; flux linkage; indirect rotor position estimation; internal closed-loop correction algorithm; measurement inaccuracies; motor parameter variations; operating conditions; permanent magnet AC motors; phase-locked loop algorithm; reliability; robustness; rotor position estimation drift; rotor position sensorless technique; standstill; transient speed changes; AC motors; Acceleration; Couplings; Current measurement; Phase locked loops; Phase measurement; Robustness; Rotors; Signal processing algorithms; Voltage;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2003.809377
Filename :
1189604
Link To Document :
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