Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Analysis on Position Estimation Performance according to Injection Frequency in Carrier-Based Sensorless Operation
Authors Chae-Eun Hwang ; Younggi Lee ; Seung-Ki Sul
Page pp.139-146
ISSN 1229-2214
Keywords Carrier-based sensorless ; Spatial harmonics of inductance ; Injection frequency ; Non-ideal characteristics ; Position estimation performance
Abstract This work puts forward a theoretical analysis on position estimation performance of interior permanent magnet synchronous motor (IPMSM) according to the injection frequency in carrier-based sensorless operation. The effects of spatial harmonics on inductance and voltage distortion due to the nonideal characteristics of IPMSM and inverter are examined as factors influencing the position estimation performance. Furthermore, the position estimation performance is analyzed by calculating the current at the switching instant in several operating conditions. In summary, the half switching frequency injection is more robust to the nonideal characteristics of IPMSM, especially with light load condition. The validity of the analysis is verified by the simulation and experimental results.