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Analysis on Position Estimation Performance according to Injection Frequency in Carrier-Based Sensorless Operation

반송파 기반 센서리스 운전에서 주입하는 신호의 주파수에 따른 위치 추정 성능 분석

  • Hwang, Chae-Eun (Dept. of Electrical and Computer Eng., Seoul National Univ.) ;
  • Lee, Younggi (Dept. of Electrical and Computer Eng., Seoul National Univ.) ;
  • Sul, Seung-Ki (Dept. of Electrical and Computer Eng., Seoul National Univ.)
  • Received : 2017.12.29
  • Accepted : 2018.02.17
  • Published : 2018.04.20

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.

Keywords

References

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