3100 Bidirectional DC SCR Drive Bidirectional DC SCR Drive

General

• Superior performance
  

• Speed or torque reference input
  

• Servo loop operation for speed regulation with sudden load changes
  

• Zero deadband current regulation for precise servo control
  

• Armature voltage feedback or optional tachometer for excellent velocity
  

  regulation (analog versions)
  

• Transducer feedback for precise velocity or position regulation
  

  (digital versions)
  

• Active filtration of resonance
  

• Isolated current feedback and SCR gating circuit
  

• Integral shunt field supply
  

  Ease of Installation, Setup, and Maintenance
  

• Compact design requires minimal panel space
  

• Adjustable acceleration and deceleration rates, current limiting, overload
  

  detection threshold, field loss threshold, tachometer loss threshold,
  

  instantaneous overcurrent point, velocity- and current-loop tuning
  

• Fixed, selectable tuning components for easy tuning and adjustment
  

  (analog version)
  

• Numeric parameter setup for precise repeatability (digital version)
  

• Automatic tuning routines configure drive to connected load (digital version)
  

• Bolted ring terminals for easy power connections
  

• Easily replaceable plug-in modules
  

• Snap-in signal connections for ease of wiring
  

• Identical control boards across full power range reduces spare parts
  

• Fault and safety indicators display drive status
  

• On-screen fault, status, and diagnostic information (digital version)
  

  Safe, Reliable Operation
  

• Extensive electronic protection circuits reduce failures
  

• Line voltage compensation maintains control with varying line voltages
  

• Tolerant of AC line voltage and frequency fluctuations
  

• Transient protection circuits protect the power SCRs
  

• Current limits adjustable to 250% of rated load
  

• Overload detector protects against instantaneous and sustained
  

  current overloads
  

• Heat sink overtemperature protection
  

Electrical

Input Supply

Voltage:
Voltage tolerance:
Frequency:

Armature Supply

Voltage:

Current:

Control Supply

Input voltage:
Frequency:

Field Supply

Voltage:

Current:

Service Conditions

Overload current:

Environmental

Operating temperature:

Storage temperature:
Operating humidity:
Altitude:

Performance

Velocity regulation:

Control Modules

200 to 240 or 380 to 480 V AC, balanced three-phase
–10% of minimum, +10% of maximum
47 to 63 Hz

Full-wave, six-pulse, bidirectional SCR
250 V DC (230 V AC input)
500 V DC (460 V AC input)
Constant torque: 18 to 960 A continuous
Servo torque: 14 to 800 A continuous

115 Vrms (±10%) fused at 2 Arms
47 to 63 Hz

90 to 320 V DC, depending upon configuration and
input voltage
Upto20.0A

Servo torque: 200% of rated for 1 min;
maximum of 333% of rated

Constant torque: 150% of rated for 1 min;
maximum of 250% of rated

Up to 320 A (CT): 32° to 131° F (0° to 55° C)
400 A (CT) or larger: 32° to 122° F (0° to 50° C)
5° to 158° F (–15° to 70° C)
95%, noncondensing
To 3,300 ft (1,000 m) without derating

±3% of rated speed with armature voltage feedback
±0.1% of rated speed with analog tachometer
±0.001% of rated speed with incremental encoder

The 3100 has a configurable control rack that accommodates up to ten control modules.
Four slots are reserved for the two SCR Control modules, the System Conditioning Module,
and the Analog Control Module. Six slots are available in digital-control versions for
additional, system-specific control modules from UNICO’s 4000 series. Six basic
configurations are available:

Basic Analog Control:

• SCR control and current-loop regulation
• Open-loop velocity control using motor EMF with

IR compensation
• Closed-loop velocity control using a motor-mounted

analog tachometer
• Adjustable current and acceleration limits
• Fault detection and status indication
• Real-time clock/calendar
• 33 MHz 68360 central processor
• 2 megabyte program flash EPROM
• 256 kilobyte battery-backed static RAM
• 512 kilobyte high-speed RAM

Basic Digital Control (continued):

Remote I/O Digital Control:

Modbus Plus Digital Control:

ControlNet Digital Control:

Profibus Digital Control:

Protection

• AC line input fuses
• Phase loss
• Phase imbalance
• Transient protection
• Line undervoltage

• DC armature fuse
• Motor RMS current overload
• Instantaneous overcurrent

Power Range

Input
Voltage
230 V AC
460 V AC

Consult factory for other powers. Other voltages require appropriate derating.

• Three fiber-optic synchronous communication ports
• One RS-422/485 serial interface for drive setup
• Dual RS-232/422/485 serial interfaces for

control communication
• 24 V DC 32-bit discrete input interface
• 24 V DC 32-bit discrete output interface

• Same as Basic Digital Control, with a dual
Remote I/O serial interface instead of a dual
RS-232/422/485 serial interface

• Same as Basic
serial interface
serial interface

• Same as Basic
serial interface
serial interface

• Same as Basic
serial interface
serial interface

• Field
  

• Field
  

• Armature overvoltage
  

• Heat sink overtemperature
  

• Tachometer loss
  

• Control power undervoltage
  

• Digital control drives offer a number
  

  of additional, application-dependent
  software protective features
  

Servo-Torque
Applications
3-100 hp (2.2-75 kW)
71/2-500 hp (5.5-375 kW) 10-600 hp (7.5-450 kW)

Constant-Torque
Applications
5-125 hp (3.7-90 kW)

Digital Control, with a Modbus Plus
instead of a dual RS-232/422/485

Digital Control, with a ControlNet
instead of a dual RS-232/422/485

Digital Control, with a Profibus
instead of a dual RS-232/422/485