ru

The principle of operation of thyristor crane panels

The basic operation principle of thyristor control drives is adjustment of motor speed through modifying the rotor resistance within wound rotor motors.

Stator

Stator control circuit contains of a thyristor reverser. The direction of shaft rotation is modified by means of switching between the two phases. The motor current is controlled by two phases using a current transformers. The DVESLY drive ensures motor protection against thermal overloads and short-circuit current.

startor.png

Rotor

Rotor circuit resistance is commuted through thyristor commutators. Depending on the load on shaft, the thyristors can be arranged in a triangle or in an antiparallel connection.

rotor.png

The rotor phases are commuted in line with the signals received from the crane operator control units.

Back