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High Precision On‐Line Offset Correction for Motor Angle Sensors
Author(s) -
MORI TATSUYA,
KOJIMA TETSUYA,
KIMPARA YOSHIHIKO,
NAKANO MASATSUGU
Publication year - 2017
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22980
Subject(s) - sine , offset (computer science) , trigonometric functions , dc bias , frequency offset , sine wave , discrete cosine transform , acoustics , mathematics , computer science , control theory (sociology) , physics , engineering , electrical engineering , voltage , computer vision , geometry , telecommunications , artificial intelligence , orthogonal frequency division multiplexing , image (mathematics) , programming language , control (management) , channel (broadcasting)
SUMMARY In this paper, an angle detecting system is proposed that calculates the offset correction values for the sine and cosine signals of angle sensors. The offset correction values are calculated not from the offset errors of the sine and cosine signals but from the 1f angle error (the fundamental frequency component of the sine and cosine signals) of the angle signals. Therefore, the system can correct the 1f angle error even when the sine and cosine signals contain the double‐frequency components of the sine and cosine signals, as well as the dc offset errors. Moreover, it is possible to use low‐cost microcomputers with low computing speed, because the offset correction values are dc quantities.