The wireless charger has a sending coil arrangement on-shore mounted on a hydraulic arm with y and z axis movement. The sending coil is connected to a nearby power electronic where grid connection and alternatively shore based energy storage can be connected. The input voltage to the power electronics is 690V 50/60Hz.
On the ship side there is a similar coil arrangement where the receiving coil plate is mounted flush with the side of the vessel. The coil arrangement is connected to a rectifier for DC conversion.
The basic principle is following:
- Current in inductive sending coil creates a controlled magnetic field.
- Magnetic field from sending coil creates a current in the receiving coil.
- High frequency current flowing in the inductive coil is converted to DC Power.
- Energy is stored in the ship batteries
This system can transfer more than 2 MW with a distance between the coils of about 4- 500 mm.