Influence and compensation of temperature drift in a gap sensor on rotor resistance identification

摘要

Generally, induction motors tend to suffer influence in rotor resistance variations under vector control. Several rotor resistance identifications have been proposed. In bearingless induction motors, a rotor resistance identification based on variables in radial suspension loop has been proposed by the authors. The temperature drift in the gap sensors may cause identification errors. In this paper, the influence of the temperature drift in the gap sensors is made clean Further, it is shown that a compensation of temperature drift is effective in stable magnetic suspension.