Wheel slip correction system

Details Wheel slip correction system Wheel slip correction system

G - Physics

05

D

341/72

G05D 13/62 (2006.01)

Patent

CA 1048127

ABSTRACT OF THE DISCLOSURE A wheel slip control system for electric traction motor drives employing series-type direct current traction motors having field and armature windings connected in series electrical circuit relationship. The improvement comprises a current transformer having primary and secondary windings wound on a common core. The primary winding is serially connected in the supply connec- tion between an alternating current power source and a power rectifier. The secondary rectifier is provided with its out- put connected to supply auxiliary field current to the field winding of each series-type direct current traction motor in addition to the normal direct current excitation supplied through the power rectifier. The polarity of the auxiliary field current is such that upon addition to the normal excitation direct current, the field current is maintained substantially constant or slightly less from what it had been prior to a wheel slippage condition.

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