12IRD digital servo drive with 12 thyristors for bidirectional d.c. motors in 4 quadrants.
The 12IRD digital servo drive (part of the D SERIES) is designed to power and control permanent magnet or wound-field DC motors with maximum precision. This bidirectional servo converter is equipped with a robust 12-thyristor armature bridge, allowing smooth and reliable operation in all 4 quadrants.
For armature currents up to 500 A the thyristor bridge is housed inside the enclosure (an external bridge is used for higher currents), while the field bridge is always internal. The architecture is designed with the maintenance engineer in mind: all regulation circuits are fully digital and isolated from the power section. The front panel houses the I/O connectors (solid-state optoisolated digital and differential analogue), LCD display, programming buttons and USB port, providing full access for wiring, diagnostics and rapid tuning.
To minimise plant downtime during retrofits, all converters in the series include a removable memory card that stores the parameters, allowing instant transfer to a replacement drive.
Versioni
The 12IRD model is part of the D SERIES drive family. If your application requires different operating logic, explore the other versions of the D Series:
- Model 6ID: 2-quadrant unidirectional drive with a 6-thyristor bridge.
- Model 6AXD: 4-quadrant bidirectional with 6-thyristor bridge, specifically designed for axis control and mechanical backlash cancellation.
Further information
Armature bridge:
- 12IRD: maximum output voltage: 400 Vdc or 480 Vdc,
maximum output current (with internal armature bridge): from 15 A to 500 A (peak +33%).
Field bridge: maximum output voltage: 400 Vdc, maximum output current 20 A.
D.c. motors with wound field or permanent magnets.
- TTL 5V Line Driver Encoder.
- DC tachometer.
- Armature voltage feedback (without transducer).
- Internal connections between functional blocks configurable by the user.
- Diagnostics, parameter save/restore on PC software.
- External memory for copying and transferring parameters to another servo drive.
- ±10 V differential analog inputs with 15-bit + sign resolution.
- ±10 V analog outputs with 11-bit + sign resolution.
- Fully programmable digital I/O.
- Functional blocks for:
- Absolute value calculations.
- Signal comparators.
- Analog signal adders.
- Analog reference generators.
- Analog switches.
- Analog limiters.
- Anti-backlash via Master/Slave connection of two drives via CAN-Bus.
- Current limit during deceleration or acceleration, switchable and separately settable.
- Digital switches.
- Maximum load signaling on servo drive.
- Motor start/stop with DEN input.
- JOG command: fixed, square wave or triangular wave reference.
- Possibility to stop operation for overheated motor (settable time) or signaling only.
- Maximum load signaling on motor.
- Speed thresholds.
- Speed reached.
- Current limit variable as a function of speed.
- Motor stopped signaling.
- Motor overload (current greater than nominal), settable and limitable with thermal model.
- Dual selectable speed ramp.
- Dual selectable gain set for the speed loop.
- Three-phase mains choke
- Three-phase mains filter
- External fuse holder
- Ultra-fast fuses
Download
Instruction book in English language valid for the 12IRD, 6ID, 6AXD model with firmware V4.*