A study on operation under faults with the single-phase SR generator

This paper studies operation of the multipole single-phase switched relucta nce generator (SRG) under faults, in particular an 8/8-pole switched reluct ance machine. A new converter topology which connects coils two banks in pa rallel is proposed. The combination of multiple coils per phase and the con verter circuit suggests improved operation under faults compared with conve ntional topologies, Output power per coil current under faults is studied b y finite-element analysis and static torque measurement. Circuit equations under faults are derived and operation under faults is evaluated by simulat ion, An SRG controller is constructed and experiments are performed. The ex perimental results support the equations and simulation results. It is conc luded that the SRG can continue generating operation, even when open- or sh ort-circuited coil faults occur, with the proposed converter and proper fau lt detection circuits.