Digital DC Drives

GEMCO Digital Convertors are dedicated for industrial applications in which good static and dynamic performance and independent controls of speed, acceleration, torque, tension etc. are essential. Various special features include :

• Auxillary transducers controls, encoders, inputs, dancer arms, load cells etc

• Choice of several operating & control modes

• Automatic management of operating sequences

• Serial communication with a PC or Gemco Video Keyboard.

• Serial communication amongst various drive units for cascade / coordinated control

• Various Programmable inputs and outputs :

• 8 Digital Inputs and 4 Analogue Inputs

• 4 Digital Outputs and 2 Analogue Outputs

• Independent auxillary 24V DC power supply, allows use of wide range 3 phase supply, 110V-500V AC

• Speed feedback from Armature Voltage tachogenerator or pulse encoder

• Drive for multiple motors Machines with internal management of special function as:

• Tension controls with Diameter calculation, inertia and friction compensation etc

• Synchronisation of sectional Drives with Draw / Ratio control

• Wrong sequence of three-phase line phases

• Insufficient three-phase line voltage

• Excessive three-phase line voltage

• Phase currents unbalancing (Fuses Failure / Current Ripples)

• Integral current thermal motor protection (over loading)

• Minimum field excitation current

• External motor protections (ventilation, thermostat)

• Excessive converter temperature

• Unbalancing between reference and motor speed

• Unbalancing between armature voltage and speed

• Synchronism ramps error

• Thyristor firing pulses error

• EEPROM writing error

• Wrong parameters in EEPROM

• Wrong control circuits supplies