SKA1200055 - Variable speed drive - CONTROL TECHNIQUES

CONTROL TECHNIQUES SKA1200055 Variable Frequency Drive - COMMANDER SK / DIGIDRIVE

The variable frequency drive SKA1200055 is part of the Commander SK / Digidrive series from CONTROL TECHNIQUES (Nidec group). Designed for driving induction motors at variable speed, it provides reliable control in industrial environments where uptime and precise regulation are priorities. This reference, specified as a 0,75 HP drive, targets maintenance managers, automation engineers and integrators seeking a compact, proven solution for conveyors, pumps, fans and workshop machinery. The dual-microprocessor architecture, including a real-time DSP, drives a PWM with an adjustable carrier frequency for clean switching, reduced acoustic noise and lower harmonics. V/Hz and open-loop sensorless vector control modes allow the motor behaviour to be matched to process needs, from simple speed control to a more dynamic response. Commissioning via the local keypad or PC software simplifies startup, while the analog and digital I/O terminals provide direct coupling with a PLC, a numerical controller or an HMI.

Technical specifications

• Manufacturer reference : SKA1200055
• Range : Commander SK / Digidrive SK
• Manufacturer : CONTROL TECHNIQUES
• Type : Variable speed drive for induction motor
• Supply voltage : 230 V AC, 50/60 Hz, single-phase or three-phase depending on configuration
• Rated power : 0,55 kW (0,75 HP)
• Output voltage : 0 to 230 V three-phase, variable in frequency and voltage
• Control mode : V/f and open-loop sensorless vector
• Switching frequency : adjustable via DSP to optimise noise and losses
• Control architecture : dual microprocessor including a DSP for real-time processing
• Control interfaces : configurable analog and digital I/O terminals, output relays

Overview of the Commander SK / Digidrive SK range

The Commander SK / Digidrive SK family groups compact variable frequency drives intended for general-purpose induction motor drives. Widely used across installations, this series is valued for fast commissioning, stable regulation and compatibility with automation standards. The product philosophy favours clear parameter-based configuration, simplified maintenance and easy adaptation to existing industrial process requirements.

• Commander SK : general-purpose orientation for pumping, ventilation, conveying and handling, with V/f and sensorless vector modes for improved torque retention at low speed.
• Digidrive SK : related variant prioritising compactness, energy efficiency and retrofit on existing lines, while retaining a familiar configuration interface.

The SKA1200055 model fits this range logic, offering sizing suited to low-power applications, a coherent response for common drive tasks and smooth integration with PLC and numerical control architectures.

Industrial applications

With its V/Hz and sensorless vector control modes, the SKA1200055 drive covers a wide spectrum of applications where speed regulation and energy optimisation are required:

• Conveying and continuous handling : speed regulation, soft starts, simple section synchronisation.
• Pumps and ventilation : flow adjustment, reduction of inrush current, operation adapted to variable load profiles.
• Workshop and assembly machines : speed variation for drills, mixers, winders and auxiliary stations.
• Packaging : control of rollers, belts and feed devices under cadence constraints.
• Process infrastructure : control of auxiliary units, cabinet ventilation, secondary drives in industrial environments.

Integration and communication

The Commander SK / Digidrive SK provides analog and digital input/output terminals for direct wiring to the PLC, HMI or a numerical control. Optional communication cards are available for common industrial fieldbuses, easing integration into new architectures as well as modernisation projects. This approach enables efficient coexistence with other drive equipment, including servo motors and servo drives, within mixed installations.

Commissioning is performed via the local keypad and PC configuration software, with clear status readout and parameter setup for ramps, limits and I/O assignments. Built-in protection functions, such as overload, overcurrent and overvoltage monitoring, help protect the motor and preserve system availability. The adjustable carrier frequency allows tuning the trade-off between switching noise, heating and performance according to workshop constraints.

Availability and warranty

The CONTROL TECHNIQUES SKA1200055 drive is offered by Standard Exchange Industry as reconditioned supply, exchange unit or repair service, with bench functional tests and a 6 to 24 months warranty depending on the chosen service. Shipping is provided within 24 to 72 hours to over 120 countries, meeting the needs of production sites facing unplanned downtime. Our technical teams support reference identification, electrical compatibility checks and selection of key parameters to secure restart. For like-for-like replacement or a controlled retrofit, this Commander SK / Digidrive reference offers a pragmatic, long-term solution in the variable speed drives category.