218262 ⎘
Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling field supply only
Sub-classes:Methods for controlling a voltage present at an electric fan
#2Motor driving device
#3Field winding rotating electrical machine and method for controlling field current of a field winding rotating electrical machine
#4Cross-interlocked switch type DC electric machine having auxiliary excitation winding and conduction ring and brush
#5Cross-interlocked switch type DC electric machine having auxiliary excitation winding and conduction ring and brush
#6DC motor assembly with soft starting capability
#7Circuit System and Method for Operating an Electric Motor Having Variable Speed From a Direct-Voltage Source
#8Motor drive unit
#9Current sensing in a two-phase motor
#10Current sensing in a two-phase motor
#11Current sensing in a two-phase motor