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CONTROL TECHNIQUES Servo Drive
Brand: CONTROL TECHNIQUES -
Code:UNI2403
| Combination name | Availability | Price |
|---|---|---|
AC Variable Speed Drive – CONTROL TECHNIQUES UNI2403
The UNI2403 is an AC variable speed drive (“Variable Speed Drive”) from the Unidrive Classic family, manufactured by Control Techniques. Documented on CNC machining centres, milling machines and lathes equipped with three-phase induction motors, it regulates motor speed and torque via PWM modulation. It operates in open-loop V/Hz, open-loop vector (sensorless) and closed-loop vector modes with encoder feedback. The Unidrive Classic is the first generation of the Unidrive platform, predecessor to the Unidrive SP and Unidrive M families.
The variable frequency drive is the power and regulation element that converts three-phase mains voltage into variable voltage and frequency, enabling precise speed and torque control of the induction motor. A drive failure completely disables the associated axis or spindle, bringing the machine to a standstill; typical faults include overvoltage, overtemperature, loss of encoder feedback or short-circuit on the IGBT power stage.
Control Techniques is a British manufacturer founded in 1973, specialising in AC and DC drives, servo systems and industrial motors. Acquired by Emerson Electric in 1994 and subsequently by Nidec Corporation in 2012, it now operates as the Nidec Control Techniques division. The Unidrive Classic line is legacy / discontinued: available only as used, NOS or through specialist repair.
Main Technical Specifications
| Type | AC variable frequency drive (Variable Speed Drive) |
| Part number | UNI2403 |
| Brand | Control Techniques (Nidec Group) |
| Known application | CNC machining centres, milling machines, lathes with three-phase AC induction motors |
| Function | Three-phase induction motor speed and torque control via PWM modulation |
| Input voltage | 380–480 V AC three-phase, 50/60 Hz |
| Rated output current | ~14 A |
| Motor power | ~7.5 kW |
| Operating modes | Open-loop V/Hz; open-loop vector (sensorless); closed-loop vector (encoder) |
| Interfaces | Analogue/digital control terminal strip; encoder connector; power terminal strip |
| Weight | ~5–10 kg |
| Dimensions | ~250–350 × 150–250 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
