Parameter identification of synchronous machine by dc chopper excitation signals

This paper presents an original approach to identifying the linear parameters of a salient-pole synchronous machine at standstill time response tests data. A new approach is proposed for the estimation of synchronous machine coupled to DC-chopper; using data recorded during steady-state operation of the chopper-machine unit. The time constant models and equivalent circuit models are estimated. This procedure consists of defining and conducting the standstill tests, identifying the model structure, estimating the corresponding parameters, and validating the resulting model. The signals used are chopper wave voltages exciting the machine at standstill and the resulting output current in the different windings. The results are presented from tests on the synchronous machine of 1.5 kVA/380 V/1500 rpm.