Position sensorless control of synchronous reluctance motor using high frequency current injection

1999 ◽  
Vol 14 (4) ◽  
pp. 1271-1275 ◽  
Author(s):  
Seog-Joo Kang ◽  
Jang-Mok Kim ◽  
Seung-Ki Sul
Keyword(s):  
High Frequency ◽  
Sensorless Control ◽  
Current Injection ◽  
High Frequency Current ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Frequency Current ◽  
Position Sensorless

Performance of Pulsating High-Frequency Current Injection Based Sensorless Control of PMSM

2013 ◽  
Vol 347-350 ◽  
pp. 610-616
Author(s):  
Jian Min Wang
Keyword(s):  
High Frequency ◽  
Sensorless Control ◽  
Tracking Error ◽  
Position Estimation ◽  
Current Control ◽  
Current Injection ◽  
High Frequency Current ◽  
Position Errors ◽  
Pulsating Current ◽  
Frequency Current

In the paper the principle and performances of the pulsating current injection based sensorless control of permanent magnet synchronous motor (PMSM) are analyzed theoretically and investigated by simulations. In the analyses, the effects of the speed EMF terms and the deviation between the actual d-axis high-frequency current and the command, which results from the limited gain and bandwidth of the current control loop, are all taken into account. It is shown that the pulsating current injection method can achieve stable position estimation in a wide speed range. But appreciable position errors will result at high speeds due to the cross-coupling effects of the speed EMFs and the tracking error between the actual and command carrier current. In order to improve the performance, a modified scheme is proposed. Its validity is confirmed by simulations.

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