217522 ⎘
DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having shunt connection of excitation windings
Shunt wound DC motor driving device and electrical equipment
#2Direct current motor
#3Direct current motor
#4Flux modifier for a permanent magnet brush-type motor using wound field coils combined with permanent magnets
#5Flux modifier for a permanent magnet brush-type motor using wound field coils combined with permanent magnets