REMANENCE EFFECT REMOVING CIRCUIT AT CONTINUOUS CURRENT GENERATORS

The circuit for removing the retentivity effect in DC generators is designed for DC electric drives and ensures zero voltage for the generator; the current in the rotor circuit is also cut when the motor is in idle mode.The circuit, according to the invention, may be used in drive generators that can be equipped with an auxiliary winding on the generator poles; the circuit consists of a retentivity regulator associated to a voltage transducer and a current transducer, both mounted on the generator terminal, to a bidirectional static converter controlled by the command unit of a regulator that detects the moment when the real and rated motor speed are zero and switches the regulator on.The benefit of this invention is control over the operation of the drive when the rotor is blocked, the repeated overload switching-off of the commutation parts being avoided.