Abstract
In recent years, sensors have come to require high resolution and accuracy because of the progress of control technology. Magnetic encoders are widely used in servo motors in factory automation, because of their suitability for use in difficult environments. Research on efficiency tends to favor the use of a magnetic simulation method. However, this requires complex calculations and much time. Therefore, a simplified simulation method has been developed and used. In this paper, to obtain an ideal index phase signal, a new magnetization pattern is proposed and calculated by using the developed simulation method, named the superposed magnetizing method. The experimental results showed that by expanding the detection gap it is possible to obtain a highly accurate index phase signal.
