Six-Vertex Voltage Injection Strategy for Sensorless IPMSM Control Using Single DC-Link Current Sensor

Position sensorless drive with single current sensor (SD-SCS) is widely utilized in cost-effective applications. The drive performance of saliency-based SD-SCS can be easily deteriorated due to several reasons: inaccurate phase current reconstruction (PCR) and the interference in injected voltages f...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2024-11, Vol.71 (11), p.13879-13889
Main Authors: Park, Byung Ryang, Lim, Gyu Cheol, Han, Yongsu, Ha, Jung-Ik
Format: Article
Language:English
Subjects:
Estimation
Motors
Permanent magnet synchronous machine (PMSM)
Pulse width modulation
pulsewidth modulation (PWM)
Sensorless control
sensorless drive
single current sensor (SCS)
Vectors
Voltage control
Voltage measurement
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Summary:Position sensorless drive with single current sensor (SD-SCS) is widely utilized in cost-effective applications. The drive performance of saliency-based SD-SCS can be easily deteriorated due to several reasons: inaccurate phase current reconstruction (PCR) and the interference in injected voltages for the PCR and position estimation. Here, this article proposes an enhanced sensorless control strategy employing six-vertex voltage injection for PCR and position estimation. First, the parameter dependency in position estimation is eliminated by using the current derivative measurements at six active vectors. In addition, by modifying the sequence of voltage vectors, the proposed pulsewidth modulation scheme reduces the current ripple caused by the injected voltages. Experimental results verify that the proposed method shows high accuracy of position estimation and significantly reduces the total harmonic distortion of the phase current in SD-SCS, making it comparable to that of a position-sensored drive.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2024.3368166