Analytical and circuital modeling of commutation transients in phase-split synchronous motors supplied by multiple Load Commutated Inverters

Phase-split synchronous motors supplied by multiple three-phase Load Commutated Inverters are of importance in high power applications. A criticality of such systems is the possibility that commutations within different stator windings may overlap. The analysis of the resulting transients is complicated by the magnetic interference of motor phases among them and with rotor circuits. In this paper the complete dynamic model of phase-split synchronous machines is manipulated to derive a simple analytical and circuital description of commutation transients, including the case of multiple simultaneous commutation events. Numeric simulation results are presented to cross-check the proposed model.