Reversing Thyristor Controllers for Servo Drives

Reversing Thyristor Controllers change the motor's sense of rotation by converting the signals of the electronic variable speed systems from DC 24 V to DC 230 V or DC 400 V.

In addition to their principal task of reversing the motor direction, thyristor controllers also provide facilities such as:

• contactless electrical braking of the motor at the end of the pulse, therefore free of wear and tear;
• monitoring of the motor temperature by means of PTC thermocouples and output of a signal if critical values are exceeded;
• protection against phase short circuits by means of minimum pause periods during direction change-over;
• phase monitoring;
• interlocked direction commands;
• consideration of torque limits and travel limits in the control process;
• disabling of direction commands through an external signal
• transmission of information on faults and travel limit signals to the automation unit on the next higher level.