AS5048 magnetic encoder for the application in DC motor position control of portable spectrometer

The AS5048 is applied in high precision and small Angle position control system of scanning mechanism in portable raster scan type spectrum analyzer with dc torque motor. This paper expounds the working principle, main features of AS5048, installation and using, and implementation method in position control. The design of permanent magnet dc torque motor position control system adopts the special motor control chip TMS320F2812. It cooperates with software control method and motor drive module, realizing the motor's forward-reversing, start-stop, small angle control. The experimental results show that AS5048 work reliablly, servo system moves highly precious and basically meets the application of spectral instrument.