Improved rotating carrier signal injection method for sensorless control of PM brushless AC motors, accounting for cross-saturation effect

2011 ◽  
Author(s):  
L. M. Gong ◽  
Z. Q. Zhu
Keyword(s):  
Sensorless Control ◽  
Saturation Effect ◽  
Injection Method ◽  
Ac Motors ◽  
Signal Injection ◽  
Carrier Signal Injection

Analysis of Stator Resistance Effects in Carrier Signal Injection Based Sensorless Control of Permanent Magnet Synchronous Machine

2011 ◽  
Vol 383-390 ◽  
pp. 5951-5957 ◽  
Author(s):  
Jian Min Wang ◽  
Shi Xia Tian
Keyword(s):  
Sensorless Control ◽  
Estimation Error ◽  
Position Estimation ◽  
Estimation Accuracy ◽  
Estimation Errors ◽  
Injection Method ◽  
Signal Injection ◽  
Carrier Signal Injection ◽  
Rotor Position Estimation ◽  
Stator Resistance

This paper analyzes the effects of stator resistance on rotor position estimation accuracy in carrier signal injection based sensorless control of PMSM. Carrier current expressions are derived for both rotating and pulsating voltage injection method when the stator resistance is taken into account. Position estimation errors resulted from stator resistance are analyzed theoretically and investigated by simulation. It is shown that the influences of stator resistance on above two injection methods are quite different. The stator resistance will result in a position estimation error in the rotating voltage injection method. But it does not affect the position estimation accuracy in the pulsating voltage injection method as long as a suitable signal extracting method is used.

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