MacGregor has developed an electrically driven heavy lift ship crane design that covers lifting capacities up to 1,000 tonnes.
The concept is a result of the collaboration of MacGregor and NMF’s experience in the heavy lift industry. By combining NMF crane house design principles with MacGregor’s high tensile steel experience, the weight of the electrically driven heavy lift crane (HCE) is significantly reduced. This has a major advantage for the pedestal size and cargo capacity of the vessel, said MacGregor.
The MacGregor variable frequency drive (VFD) system improves HCE efficiency by up to 50 percent compared to the traditional closed-loop hydraulic design. In addition, power consumption can be as much as 80 percent lower during standby time for lashing and securing.
Other general VFD advantages include potential savings in capital expenditure and lower maintenance costs, as there is no need to change oil, oil filters and hoses.