H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 3/12 (2006.01)
Patent
CA 2079251
ABSTRACT OF THE DISCLOSURE A circuit arrangement for the control of the braking of a four quadrant drive which consists of two rotating electric machines mounted onto a common shaft. The drive contains an externally excited c.c. driving motor and an externally excited d.c. braking generator which is connected to it mechanically, directly or through a gear ratio transmission. The generator armature is created with a braking resistance which has small impedance as a closed circuit and into the armature circuit of the driving motor. An armature current sensing stage is inserted which observes the armature current. The current changes proportionally with the torque of the motor. The current sensing stage is connected to the comparator stage and to the output of the latter the Rgg excitation coil of the generator is connected which, with the comparator stage, the current sensing stage and through the polarity changing switch, together with the Rgm excitation coil of the driving motor is connected to the control voltage.
Balint Istvan
Banati-Baumann Sandor
Csaszar Frank
Balint Istvan
Banati-Baumann Sandor
Csaszar Frank
Gowling Lafleur Henderson Llp
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