Electric marine propulsion device with integral magnetic gearing

摘要

A propulsion device for a marine vessel, the propulsion device comprising an electrical machine with integral magnetic gearing, which comprises three members, namely a first or inner rotor comprising a first plurality of permanent magnets, a second rotor in the form of a plurality of ferromagnetic pole pieces, and a stator which is associated with a plurality of 3-phase windings and to the periphery of which a plurality of second permanent magnets are fixed. The magnetic pole piece rotor is connected to a drive shaft provided with a propulsion means for providing propulsion to the marine vessel. The first or inner rotor is free to rotate about the drive shaft. The pole pieces of the second rotor are arranged to magnetically couple the permanent magnets of the first or inner rotor to the second permanent magnets on the stator.

主权项

1. A propulsion device for a marine vessel, the propulsion device comprising:
an electrical machine with integral magnetic gearing comprising three members, a first member of which forms a first rotor with an associated magnetic field, a second member of which comprises a stator provided with a first set of permanent magnets and a third member of which forms a magnetic pole piece rotor, wherein a multi-phase winding is arranged to interact with a fundamental space harmonic of the magnetic field associated with the first member, and the magnetic pole piece rotor is connected to a drive shaft provided with a propulsion means for providing propulsion to the marine vessel; and a prime mover connected to the electrical machine.