Patent ID: 6525495
Filing Date: 2003-02-25
Classification: H02P

Abstract:
Electronic device for controlling the electromagnetic self-braking current in reversible rotating electric commutator machines, fitted with an inductor winding and an armature winding, including reversing means for controlling the functioning of the electric machine as generator by mutual inversion of the polarity of said inductor winding and said armature winding, characterised in that it includes a switchable current control circuit and an excitation circuit distinct from each other, said control circuit including an electric load, a power device for connecting and disconnecting said electric load in series in the input circuit of said inductor winding to dissipate the power produced by said electric machine when it functions as a generator, and a variable duration pulse generator for controlling the switching of said power device, and said excitation circuit including voltage generator means for generating at the moment of reversing the machine to function as a generator, a pre-set sign voltage capable of causing the self-excitation of the machine for its functioning as a generator and, as consequence of said self-excitation, the activation of said variable duration pulse generator for switching said power device to the conditions of connecting and disconnecting said electric load.