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Project information sheet: Amsterdam ArenA

Rexroth advertisement inside the Amsterdam ArenA

The requirements placed on Rexroth:

It was the renewing of an existing system of ABB. Rexroth did conceptual design together with the system integrator Bosma & Bronkhorst in Amsterdam. Rexroth got the order because of his complete solution. Delivery was price including 10 year service, which made together with the system integrator. Rexroth acted as the system integrator of the electromechanical roof drive system.

The technical principle and concept by Rexroth:

The roof consists of two roof halfs. The roof is bedded on one bogie system per side of the roof half which drive the toothed rack and pinion drive. The bogies are stationary and the rack with the movable roof is driven along. Each of these bogies are equipped with in total four AC-servomotors 2AD with planetary gearboxes and holding devices. The control of the two driven boogie sides of each roof half are placed together in a central control cabinet placed in the inside of the stadium. This means for two roof sides there are in total two control cabinets located in the inside of the stadium. The control cabinets that are placed in the inside of the stadium are not located in a control room, they are located at the outside environment. The cabinets are stainless steel and equipped with standard cabinet heatings and fans with covers with covers for cooling. The maximum inclination of the roof is 5 – 10 deg to horizontal in driving direction. In closed position the roof is horizontal, in open position the roof is about 5 -10 deg. When the roof opens the drives are only braking, the according energy is dissipated via brakeresistors.

Technical data:

  • Opening/closing time: 20 min
  • Environmental conditions: -15° … +40°C /
  • Driving power per motor: 8 kW
  • Total installed driving power: 140 kW
  • Driving distance per roof half: 38 m
  • Masterslave controlled on each drive unit! Motors with incremental encoders and an additional absolute encoder on every unit for safety and the absolute position
  • The movable roof is in operation all-season (also in winter), unless the snow load is to large to move the roof

The control concept by Rexroth:

Each of the two roof halfs is controlled independently from the other, so sepa-rate control is possible. Internally in one roof half there are two axes, the both roof sides, which are position controlled to each other. Special requirement was that one or two defect drives per side of a roof half could be overruled so the roof could be moved. This was a requirement of the fire departement.

The number of drives is equipped redundant: two of four motors per side of a roof half would be enough to drive of the roof. One of the four motors of a side is controlled to position (Master). Three of the four motors of a side follow the master in torque control mode (Slave). Each of the motors is equipped with incremental rotatory encoders as well as an additional absolute encoder for redundancy. A safety system is implemented to ensure a safe motion guarding. Mechanical end swithes are also monitored by this system. The PPC is responsible for only the motion part, a PLC is responsible for the logic part and the safety. The slave drives are in velocity control with a mo-mentreduction from the master drive. This was done due to restriction in the motion controller. The 4 drives internally in one side of a roof half are con-trolled in torque control mode for equal force transmission. The synchronisa-tion between the sides of a roof half is performed via glasfiber medium.

The services rendered by Rexroth:

Delivery of the complete control system:

  • 16 asynchronous motors: 8 per roof half and 4 per side of the roof half
  • 2 Motion Controllers PPC (Visual Motion)
  • 16 Single Drive Systems HCS03
  • 2 switchboards (1 per roof half)
  • Application Visual Motion software
  • Commissioning

External services:

  • Brake resistors
  • 16 planetary gearboxes
  • 16 holding brakes