Method to Determine the Internal Angle of a Synchronous Machine for Establishment of the Experimental Torque-Angle Characteristic

摘要

The paper describes the experimental determination of the internal angle of a permanent-magnet synchronous electrical machine with axial air gap, using the results of the usual measurements of voltages, currents and torque in transient load operation. The particular propriety of the used test-bench is pointed out, as well the necessary improvements to reduce the method limitations.