A Method for Adjusting the Absolute Rotor Position Sensor of a Permanent Magnet Synchronous Motor with a Distributed Winding

The article addresses matters concerned with the alignment accuracy of the absolute rotor position sensor of a permanent magnet synchronous motor automatically controlled by a high-frequency low-voltage converter. A modern, easiest to implement alignment method and the structure of a control system using a rotor position sensor are considered. A full-scale mockup of the terminal device, as well as a load bench, were modeled, developed, manufactured and tested. A tool for visualizing the data and operation processes occurring in the microcontroller of the high-frequency converter control system in real time is considered. A permanent magnet synchronous motor control system model is built. The article presents the results obtained from practical tests and simulation of the control system with and without using the controllers of the current direct and quadrature components, as well as at different rotor position sensor deviation angles. The regularity linking the variation of the stator current direct and quadrature components with the rotor position sensor’s initial positioning angle error is derived. The results of experimental studies and mathematical simulation (phase current, current direct and quadrature components, and rotor position angle time curves) are presented. An algorithm for automatically adjusting the rotor position sensor of a permanent magnet synchronous motor with reference to deviation of the current direct component in response to a change in the rotor rotation direction with angle determination accuracy up to 0.18° has been developed and implemented.