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http://dx.doi.org/10.6109/jkiice.2011.15.5.1018

Analysis of the Encoder Composite Signal for a Absolute Position Detection of the Synchronous Motor  

Joo, Jae-Hun (창원대학교 공과대학 전자공학과)
Kim, Dong-Hyun (창원대학교 공과대학 전자공학과)
Choi, Jung-Keyng (창원대학교)
Abstract
For the driving of the sinusoidal type permanent magnet synchronous motor with a maximum continuous torque, the 1200 delayed three phase sinusoidal current inputs which matched with the absolute rotor position are needed at the stator coil. Therefore, the detection of a absolute rotor position is required inevitably. And the right angle relationship between stator magnetic field and rotor magnetic field has to be preserved at a stator by this commutation action. The detection of a absolute position for the commutation can be made generally by the output signal analysis of the encoder attached at a motor shaft. The purposes of this study are to design signal processing logic circuits which could detect the absolute position of motor with a modern encoder system and generate the three reference wave for making sinusoidal current input at a stator coil.
Keywords
commutation; encoder; synchronous motor; absolute rotor position;
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  • Reference
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