Description

Parker SSD Drives 512C – 8A Four Quadrant DC Thyristor Drive

The 512C converter is intended for use in an Industrial Environment, it should be mounted
within an enclosure which provides protection to the converter and the user.
The converter should be permanently earthed at the terminals provided.
The 512C converter is suitable for the control of Permanent Magnet and Shunt Wound DC
Motors.
The converters are designed to operate from a single phase ac mains supply in the range of 110Vac to 415Vac at 50 or 60Hz. A simple transformer tap arrangement allows the converter to be programmed to suit the applied voltage.
The Speed of the DC Motor is controlled using a linear closed loop system with a feedback
signal from either tachogenerator or armature voltage, the feedback source being switch
selectable.
A current loop within the speed loop always ensures that controlled levels of current are applied to the motor, actual levels being scaleable via programmable switches.
Motor protection is provided by a Stall detection circuit which will remove current from the motor after approximately 60 seconds.
Converter protection is provided by a Instantaneous Overcurrent trip circuit overriding control in the event of a Short Circuit.

The 512C provides effective torque and speed control of permanent magnet or wound field DC motors. Extremely linear speed and current loops in an isolated package, ideal for single or multiple motor applications up to 32A, 9kW.

Typical applications include:

• Centrifugal fans and pumps
• Extruders and mixers
• Small paper converting machines