How is transient analysis of electrical machines performed?

Transient analysis models machine behavior during rapid changes like starting, faults, or load transients. Methods include: d-q axis transformation (converts three-phase to equivalent two-phase for simplified analysis), coupled circuit approach (electromagnetic and mechanical equations solved together), and finite element analysis (for detailed field distribution). Key parameters include subtransient reactance (first few cycles), transient reactance (several cycles), and synchronous reactance (steady state). Park's equations describe complete electrical dynamics in rotor reference frame.