DEVICE FOR IMPROVING COMMUTATION OF DC COMMUTATOR MACHINES Russian patent published in 2001 - IPC

FIELD: electrical engineering; dc machines supplied with power from static converters. SUBSTANCE: total armature current is recorded by armature current sensor; total commutating current is recorded by commutating-flux sensor; capacitors separate ac components from these signals, mentioned signals arrive at computing unit whose task is producing commutating-pole currents, coordinating armature current and commutating flux; mentioned unit also functions to shape job for adjustable current source connected to independent commutating-pole coil. EFFECT: reduced commutator arcing under both steady state and transient conditions. 4 dwg