Magnetic geared electrical machine, power generation system, and drive system

A magnetic geared electrical machine, comprising:

• a stator;
• a magnetic pole piece rotor including a plurality of magnetic pole pieces disposed radially inward of the stator;
• an inner rotor including a plurality of rotor magnets, disposed radially inward of the plurality of magnetic pole pieces, and configured to rotate at a higher speed than the magnetic pole piece rotor;
• and
• a fan for cooling at least one of the stator, the magnetic pole piece rotor, or the inner rotor,
• wherein the magnetic pole piece rotor further includes a power transmission shaft disposed on one side in an axial direction relative to the plurality of magnetic pole pieces, and configured to transmit rotational power to and from an external device,
• wherein the fan is attached to the inner rotor on an opposite side to the power transmission shaft with the rotor magnets therebetween in the axial direction,
• wherein the inner rotor includes a core provided with the plurality of rotor magnets,
• wherein the core has an inner ventilation path extending along the axial direction, and
• wherein the magnetic geared electrical machine further comprises:
• a housing for accommodating the stator, the magnetic pole piece rotor, the inner rotor, and the fan;
• and
• a baffle plate fixed to the housing at an axial position between the inner ventilation path and the fan, and extending along a radial direction.