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Control Techniques has supplied drives for Vincsan, a crane manufacturer, for a unit that is believed to be the largest-capacity overhead crane in Turkey.

The regeneration setup comprises three paralleled Unidrive SPMD 1424 AC modular drives in regenerative mode, rated at 500kW and feeding all the motor drives on the crane.

The two main 275 ton hoisting motors, from Leroy Somer, are driven by further SPMD1424 modular AC drives, while an auxiliary hoisting motor is controlled by a 55kW Unidrive SP AC drive and a travel motor by a 44kW Commander SK AC drive.

There are a total of 20 crane travelling motors, which are electrically controlled in groups of five – each group being controlled by a modular SP 1421 drive.

All of the drives are under the overall control of a master PLC that communicates with all of the drives by Profibus DP, each drive being fitted with an SM module for this purpose.

The system features control of the brakes via the drive software and constant power hoisting via feedback from load cells to prevent overload/over-speed.

During lowering operations, the system automatically moves into regeneration mode to feed energy back into the common bus system and provide savings in overall energy consumption.

The Unidrive SP Modular drives range can be arranged to provide a common DC bus system with or without an active front end (regenerative, four-quadrant operation).

Very high current motors may be controlled using a multi-drive modular arrangement.

The drives comprise the same features as the whole Unidrive SP range that spans 0.75kW up to 1.9MW.

The Unidrive SP AC drive range is configurable into five operating modes – open and closed loop, vector, servo and regenerating modes, connectivity to most industry standard networks and accepting 14 position feedback protocols.

With a range of plug-in module options, its onboard PLC can be supplemented with programmable modules.

The Commander SK range offers ease of fitting, setup and use, good dynamic response, almost universal connectivity and energy-saving efficiency.

The range has been designed to encompass the needs of the mainstream distribution market, with easy-to-fit and set-up features that encompass 90 per cent of applications.

Control Techniques

Control Techniques, an Emerson Industrial Automation company, is a world leader in the design, production and marketing of electronic variable speed drives for the control of electric motors. Our strategy is to concentrate on delivering drives and servo products that enhance the productivity of our customers’ machines and processes.

We operate through a global network of drive and application centres that both distribute product and add value by building our drive products into custom designed systems and by offering the highest levels of customer service.

Our Control Techniques drive centres also provide us with invaluable feedback and market intelligence so that we can further improve our products and service. This customer focused strategy will enable us to continue to grow profitably.

Our competitive edge is based on our unique focus on drives, our strength in research and development, our investment low-cost manufacturing and an effective worldwide marketing strategy.

Emerson Industrial Automation, a business of Emerson, is a global technology provider that enables productivity, efficiency and quality gains for customers across a spectrum of industries. Our products include alternators, electric motors and drives, electrical distribution devices and mechanical power transmission, fluid automation and ultrasonic joining solutions. Visit our website for more details.

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