Case Study

All the Fun of the Fair – powered by Invertek Drives

All the Fun of the Fair – powered by Invertek Drives


Numerous problems with the speed of the attraction's motorised boom, the inability of the ride to start on a 75kv generator and high fuel consumption was costing its operator.


The introduction of an Optidrive P2, with a parameter set to 60Hz output and an accelerator ramp to 30 seconds helped overcome all the problems, resulting in correct and smooth speeds and a single generator in place of two, helping save energy costs.


Mitro Entertainment wanted to identify solutions for a number of problems on its Zipper carnival ride. These included:

  • The boom rotational speed was running at 5.5rpm - it should have been 7.5rpm
  • The cable rotational speed was running at 3.5rpm – it should have been 4.5rpm
  • The ride wouldn’t start on a 75kva generator – it kept stalling the generator
  • The customer was having to run the ride solely on a 250kva generator which meant high fuel consumption
  • The customer had previously been advised to change the motor & electrics, or revamp the whole hydraulic system - neither option was economically viable

The sales partner suggested the best solution would be to install an Optidrive P2, set the parameter to 60Hz output, set the accelerator ramp to 30 seconds and enable the energy optimiser.The installation of the P2 has effectively overcome all of the problems and resulted in significant energy and cost savings for the ride’s operator.Outcomes:

  • The boom rotational speed is now correct at 7.5rpm
  • The cable rotational speed is now correct at 4.5rpm
  • The Zipper ride will start and run smoothly on a 75kva generator
  • The 250kva generator now runs all of the other rides, lighting, machines etc (meaning two generators are no longer required)
  • The motor now runs at 3.7kw (down from 17.6kw) and 12.8amp (down from 21.7)

Brett Masters, Invertek Australia, said: “Our client was amazed at the difference the installation of the Optidrive P2 made. The Zipper is one of its main attractions, but it was using a significant amount of energy to run and costing far too much money. None of the other options they’d identified were economically viable and there was a very real threat to the ride’s future. Installing the P2 has given the Zipper a new lease of life.” Find out more about the Optidrive P2’s capabilities here and follow this link to read more case studies.