SKB3400150 - Variable speed drive - CONTROL TECHNIQUES

Control Techniques SKB3400150 Variable Frequency Drive - Commander SK

The SKB3400150 variable frequency drive belongs to the Commander SK range from Control Techniques, a series known for precise control of induction motors in industrial environments. Intended for intensive Heavy Duty use, this model meets speed and torque regulation needs on production lines, material handling stations and utilities. Its compact design eases integration into a control cabinet or panel while retaining control capabilities suited to common applications such as conveying, pumping and ventilation. The dual-microprocessor architecture, including a DSP dedicated to PWM synthesis with adjustable carrier frequency, improves low-speed control accuracy and enhances responsiveness to load variations. Standard functions for start, stop, setpoint adjustment and acceleration/deceleration ramps, combined with common motor protections, contribute to operational continuity and reduce mechanical stress on the installation.

Technical specifications

• Manufacturer reference : SKB3400150
• Range : Commander SK
• Manufacturer : Control Techniques
• Type : Compact AC variable speed drive for cabinet or panel mounting
• Supply voltage : not specified in this datasheet, industrial low voltage 50/60 Hz, to be confirmed according to the installed version
• Rated power : 1.1 kW (1.5 HP)
• Rated output current : not specified here
• Output voltage : variable three-phase AC, dependent on input voltage
• Control mode : PWM synthesis under DSP for asynchronous motors in open-loop, details to be confirmed depending on version
• Switching frequency : adjustable, value according to Commander SK configuration
• Degree of protection : to be verified according to installation and environment

Overview of the Commander SK range

The Commander SK series brings together compact AC variable speed drives designed to control three-phase induction motors for general industrial applications. This range has been widely deployed to modernize fixed-speed drives, improve reliability during load changes and finely adjust rotational speed according to the process. The presence of a processor dedicated to real-time calculations and a DSP handling PWM modulation results in stable regulation, controlled responsiveness and good torque quality at low speed. Standard functions include ramp management, speed setpoints, rotation direction and common protections such as overload, overcurrent and overtemperature. Depending on cabinet configurations, the drive can be configured to integrate into existing automation architectures controlled by programmable controllers, using standard control signals and the usual interlock logic. I/O options and communication extensions, when present on the relevant version, allow harmonizing the drive control with the client’s network architecture while minimizing engineering changes during a replacement.

Industrial applications

The SKB3400150 covers a range of typical uses where speed variation improves process stability, reduces mechanical wear and contributes to energy efficiency. It is suitable for continuous production environments as well as utility installations. Some representative use cases are listed below.

• Conveying and sorting : speed regulation on belts and rollers, adapting to throughputs and accumulation phases
• Pumping : speed adjustment to control flow, limiting water hammer via acceleration/deceleration ramps
• Ventilation and extraction : variable-speed fan control for air balancing and noise reduction
• Light assembly and packaging machines : simple synchronization of auxiliary drives in open-loop
• Light material handling : palletizing, transfer and distribution with moderate torque requirements

Integration and communication

Integration of the Commander SK relies on straightforward commissioning, with parameters focused on speed setpoints, ramps and protection thresholds. Start, stop and reversal functions, combined with a PWM with adjustable carrier frequency, allow adapting motor behavior to the mechanical and acoustic constraints of the site. Compatibility with common automation practices facilitates connection to existing systems controlled by programmable controllers or numerical controllers, via standard control links and usual interlock logic. When communication modules are provided on the installed version, integration with industrial fieldbuses can be carried out in line with the client’s network architecture, subject to validation of the options actually present. This approach reduces the risk of prolonged downtime during a replacement and secures process reproducibility.

As part of a renovation or exchange program, the SKB3400150 can be fitted without major cabinet modifications when the mechanical footprint and connections remain compatible. The rated power of 1.1 kW (1.5 HP) covers many auxiliary drives. Standard ramp and limit parameters help extend the life of mechanical components by smoothing shocks and stabilizing transient phases. Motor and network fault protection, integrated into the range’s logic, secures restart after an incident, subject to diagnosis of the root cause.

Availability and warranty

Standard Exchange Industry offers the SKB3400150 as new supply, exchange unit or repair depending on the condition of your installation. Reconditioned units, functionally tested, are available to ensure quick continuity of operation while controlling maintenance costs. Shipping is carried out within 24 to 72 hours depending on stock and destination. Each service is covered by a contractual warranty appropriate to the selected option. Our technical teams support you in identifying the exact drive reference, verifying electrical and mechanical compatibilities, and preparing key parameters. If information is missing from this datasheet, we verify manufacturer data and validate based on the installation to secure integration. This approach aims to minimize downtime, ensure reliable restart and extend the durability of existing equipment.