Frequency inverter technology for efficient hoisting

The use of frequency inverters for the hoisting process increases productivity. This leads to an extended lifetime of motors and brakes as well as cost savings for maintenance work and spare parts. Furthermore, the hoist works in a far more energy efficient manner than a conventional contactor-controlled solution.

  • Safe hoist speeds for the smooth handling of heavy loads
  • Quick hoist speeds with low loads increase productivity
  • Reduced energy consumption
  • Working time is reduced thanks to more effective and quicker working with load-dependent speed regulation
  • Less wear and tear due to reduced mechanical load
  • Reduced downtimes
  • Reduced operating costs

Standard equipment:

  • Load-dependent speed regulation (ESR)
  • Duty cycle 60%
  • Overheat protection
  • Insulation class H
  • Protection rating IP55
  • Bearing sensor to monitor the rotating speed (A motor) or encoder to regulate rotating speed, closed loop control (S motor)
  • External fan (S motor)

An innovation which sets economical standards

A-motor with HoistMaster2p or HoistMaster4

When using an A-motor in combination with a HoistMaster2p the hoist inverter is installed in the bridge panel. In some hoists the hoist inverter HoistMaster4 can be directly integrated into the hoist panel.

An A-motor operates, compared to polemotors, with only 50% lifting motor power and thus reduces energy costs by around half. Despite the halved hoist motor power, the load-dependent speed regulation (ESR) enables work to be carried out more effectively and quicker with an average industrial crane workload:

  • Triple the nominal speed at 10% partial load
  • Double the nominal speed at 40% partial load
  • Standard nominal speed at 100% full load

The A-motor technology is a cost-effective solution, because of its favourable acquisition costs and savings in operation, which pay for themselves very quickly.

S-motor with HoistMaster2p

When using an S-motor in combination with a hoist inverter HoistMaster2p, the hoist speed and hoist motor performance are comparable with the standard speeds. Thanks to the separate fan that comes as standard on the hoist motor, the hoist can also be operated at full load for a very long time at a slower hoisting speed.

The encoder constantly regulates the rotating speed of the hoist motor and thus guarantees that the load is transported safely and accurately even at very low hoisting speeds (only 1% of the nominal speed).

The load-dependent speed regulation (ESR) enables:

  • 1.5 times the nominal speed at 25% partial load
  • Standard nominal speed at 100% full load

The S-motor together with hoist inverter HoistMaster2p offers the possibility of connecting up to 4 hoists together via an optical cable and to synchronise the joint hoist lifting process.