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Around 100 AC drives and servo motors from Control Techniques have been utilised in a project to automate the movements of backdrops, scenery and complex lighting arrays as part of the renovation of the Royal Shakespeare theatre in Stratford-upon-Avon, UK.

Trekwork was responsible for the renovation of the over-stage installation, including the development, design, manufacture and installation of 60 winches plus hoists for 30 light arrays.

The winches are fitted with 15kW Unidrive SP AC drives operating in servo mode and twinned with Unimotor 190 fm servo motors from Control Techniques.

Thirty light clusters are controlled by 1.5kW Unidrive SP drives and size 115 Unimotor fm servo motors with double-brakes, facilitating the flying of lights in and out at a speed of 1m/s, using the ‘Light-Lock’ anti-swing device.

Benefits of product application

  • The automation system allows the Royal Shakespeare Company (RSC) to easily achieve changeover between sets within two hours, offering flexibility in set design and operation
  • RSC’s head of automation, Adam Harvey, said they have not experienced a single drive failure
  • The automation system offers precise positioning and speed control
  • A single DC bus fed by two rectifiers feeds all drives
  • During braking, recovered energy is recycled via the drives to the DC bus, producing some energy savings

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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