A simple method to improve accuration of rotor position sensing for PMSM motor with hall effect position sensor using state observer
LEN
LEN
Abstract
Field Oriented Control in PMSM needs accurate angle information to generate maximum torque and less ripple. However, many economic PMSM motors are only equipped with hall sensors which have up to 60 degrees error. In some applications where continuous torque is necessary, angle error will lead the motor into stall condition or even stopped rotating. A state observer is proposed to improve FOC control performance by reducing angle error from Hall sensors. Current and voltage input of the motor is used as information to predict the rotor angle. Computer simulation has been done using PSIM(TM), and the simulation result shows a significant improvement on the performance indicated by less torque ripple.
Keywords: Field Oriented Control
Topic: Control System