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Lenze SMV frequency inverters have improved performance and reduced costs on Centraction’s centrally installed vacuum-cleaner systems.

The inverters change the pump speed according to load, saving energy and reducing energy consumption when loads are low.

In addition the IP65 enclosure of the SMV removes the need for a panel, reducing installation costs.

Swedish company Centraction’s centrally mounted systems comprise a suction unit, cyclone separator, controls and a drive that connects through a ducting system to distributed vacuum points.

They are used in hotels, offices, public buildings and ships.

The Lenze office in Sweden was asked to propose alternative drives for motors up to 13.5kW that could respond rapidly to changing loads, and also spinning pick up motors, an area where the previous non-vector drive struggled.

The Lenze SMV inverter is a modern sensorless vector drive and had no problem in responding quickly to demand signals.

The integrated PID function in the inverter with 0-10V input was linked to the analogue output, which gives a 0-10V signal proportional to load.

This solution meant no external sensor was required as feedback for the PID function, saving money for Centraction.

The SMV features an IP65 rating, which means that – unlike the previous IP20-rated drive employed on the application – it does not require a separate control enclosure in the majority of environments where the vacuum cleaners are used.

The ability of the drive to offer its own built-in protection against dust, dirt, debris, atmospheric moisture and low-pressure water jets means that the SMV reduces costs for the manufacturer.

These come from savings on the enclosure itself and on the cost of wiring and installation time.

Lenze SMV inverters with IP65 enclosure are available to suit motors from 0.25 up to 22kW.

Even the larger sizes have full IP65 protection from dust and low-pressure water jets.

The vector design gives fast response, impressive low-speed operation and comes with sophisticated auto-tuning.

Options include a lockable isolator to aid maintenance, and a face-mounted speed potentiometer.

With 40 years' experience, Lenze Ltd are specialists in drive and automation equipment for the UK market. Today Lenze employ 60 people and operate with management systems approved to ISO 9001:2008.

Experience and expertise

The engineering comes first. With almost 50 per cent of our staff being qualified engineers, the right-sized technical solution to your problem is our goal. Our vision of right sizing means to work with you in order to achieve the optimum solution in terms of cost and performance.

The complete drive system  

Our products fit together to make the complete drive and automation system. Lenze products include automation, controllers, servos, inverters and geared motors. Our Techdrives division adds essential drive components such as couplings, actuators and locking bushes to complete your design.  

Worldwide, we are there to help you

Lenze companies are in 29 countries and have sales offices in a further 24. Full product information is available on our website and the international helpline makes it easy to contact us.

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