SKBD200110 - Variable speed drive - CONTROL TECHNIQUES

Control Techniques frequency inverter SKBD200110 - DIGIDRIVE SK

The frequency inverter SKBD200110 belongs to the Digidrive SK series from Control Techniques (Nidec group). Designed to control three-phase induction motors at variable speed, it is aimed at general industrial applications where speed stability, torque control and service continuity are key operational criteria. The control architecture is built around two microprocessors, including a DSP dedicated to generating a PWM signal with adjustable carrier frequency. This configuration enables precise modulation, responsive dynamics and reduced motor noise. The SKBD200110 offers operation in V/f or sensorless vector control depending on settings, integrated motor protections (overcurrent, overvoltage, overheating, earth fault, etc.), and analog and digital I/O for easy integration with a programmable logic controller, numerical controller or operator panel. Configuration is performed via the local keypad/display and Control Techniques commissioning tools. As part of a plant upgrade or a replacement on existing equipment, this drive helps maintain functional compatibility, stabilise production and optimise energy consumption, especially on pumps and fans.

Technical specifications

• Manufacturer reference : SKBD200110
• Range : Digidrive SK
• Manufacturer : Control Techniques (Nidec)
• Type : AC variable speed drive for three-phase induction motor
• Control mode : V/f and sensorless vector control, selectable by parameter
• Processing chain : Dual microprocessor, DSP for PWM modulation
• Carrier frequency : Adjustable according to application to optimise noise and losses
• Inputs/Outputs : Digital I/O for start/stop, direction, analogue I/O 0–10 V and 4–20 mA for speed references (depending on configuration)
• Built-in protections : Overcurrent, overvoltage, overheating, earth insulation fault, load monitoring
• User interface : Local keypad/display, Control Techniques configuration tools
• Mounting : Cabinet or panel mounting, fan controlled depending on frame size
• Power range : Depending on the variant within the range, reference SKBD200110 is generally associated with a drive around 1.1 kW, to be confirmed on the product nameplate
• Supply and output voltage : Variable according to the version, consult the manufacturer's datasheet or the nameplate for installation

Overview of the DIGIDRIVE SK range

The Digidrive SK series was designed to cover a wide spectrum of common industrial variable speed applications, with streamlined commissioning, accessible tuning and control capability sufficient for most continuous processes. Digidrive SK drives are characterised by their compatibility with standard induction motors, their ability to operate in V/Hz for simplicity or in sensorless vector mode when low-speed torque stability and speed accuracy are required. The range offers mechanical frame sizes suitable for cabinet integration and configuration options allowing performance to be adjusted to the load and required acceleration profiles. Integrated safety and protection functions help preserve motor life and equipment availability by limiting the impact of transient conditions and supply faults. This series therefore meets the needs of processing industries, logistics and utilities, notably for conveyor lines, fluid handling and industrial ventilation.

• V/f mode : Simple setup, regulation suited to variable-torque loads such as fans and pumps
• Vector control : Improved torque hold at low speed, useful for conveyors, feeders and mechanisms subject to load variations

Within this context, the SKBD200110 model sits in the mid-power range of the series, suitable for small machine motors and process units. The exact power rating and voltage must be checked on the drive and motor nameplates to ensure correct installation compliance and proper sizing of upstream protection devices.

Industrial applications

This frequency inverter integrates into environments where speed control is a lever for quality and energy efficiency. Driven locally or via a PLC, it provides controlled acceleration ramps, current limiting and stabilization of the operating point. Typical use cases include flow regulation, basic synchronisation of linear movements and compensation of moderate load variations using vector mode.

• Conveying and light handling : Speed adjustment of belts, rollers and transfers to match flow
• Centrifugal pumps : Flow adjustment and reduction of pressure spikes, energy savings at partial load
• Fans and extractors : Speed modulation to maintain required air flow with optimised consumption
• Packaging machines : Drive of auxiliary motors, feeders, labellers and reel drives
• General industrial processes : Mixers, agitators, screw conveyors where speed regulation improves process quality

Integration and communication

The SKBD200110 connects easily to existing automation architectures. The digital I/O allow start/stop commands, direction reversal and selection of preset speeds. The analogue I/O accept 0–10 V or 4–20 mA setpoints, useful for control by PLC, external PID controller or supervision system. The adjustable carrier frequency helps reconcile acoustic requirements, switching losses and motor heating. Parameterisation is performed via the local keypad and Control Techniques configuration tools for reliable commissioning, saving parameter sets and fault analysis. Depending on cabinet configurations, the unit can be fan-cooled and associated with upstream protection and filtration devices to meet installation standards and line electromagnetic compatibility.

Integration with numerical control and supervision systems is achieved by wiring standard signals or via dedicated modules depending on the range and available options. The Digidrive SK documentation details the terminals, wiring of analogue loops and logic of digital inputs, which facilitates interfacing with multi-vendor PLCs and sequential control scenarios.

Availability and warranty

The Control Techniques SKBD200110 drive is offered by Standard Exchange Industry as reconditioned supply or exchange unit, bench-tested and delivered with warranty according to the chosen service. Shipping is arranged within 24 to 72 hours to over 120 countries, meeting rapid restart constraints in case of a line stoppage. Our technical team assists in selecting a compatible reference, preparing commissioning and identifying key parameters to restore the expected motor performance. As an alternative to a full drive replacement, the electronic repair service can extend the life of installations while preserving existing configuration consistency. To confirm supply voltage, rated power and I/O options, refer to the product nameplate and the Digidrive SK documentation. This approach ensures integration compliant with your site's safety, reliability and energy efficiency requirements.