Impact of closed loop pole placement on the low speed performance of VFDs using low-resolution position sensors

The main aim of this paper is to investigate the influence of speed loop pole locations on command tracking and torque disturbance rejection at low speed in variable speed drives using low-resolution position sensors. The study considers a fixed position speed estimation algorithm, and experimental tests have been conducted on a 3kW permanent magnet synchronous motor drive. The experimental results validate the effectiveness and feasibility of the theoretical study.