Permanent magnet machine with two stators

A wind turbine generator, comprising:

• a first stator and a second stator arranged next to each other in an axial direction on a ring shaped stator support structure connected to a main shaft, each of the first stator and second stator including a corresponding lamination stack and corresponding windings;
• a rotor fixed to a rotor holding structure,
• a first inverter and a second inverter, each of which connected to the respective windings of the first stator and the second stator,
• wherein the first and second stators are arranged within the rotor holding structure,
• wherein the rotor comprises permanent magnets mounted opposite to the lamination stacks of the first and second stators on the rotor holding structure, the permanent magnets having a length in the axial direction that corresponds to the added axial lengths of the two stators,
• wherein electromagnetic fields occurring in the first stator are displaced by an angle of thirty electrical degrees with respect to electromagnetic fields occurring in the second stator, and
• wherein currents fed by the first and second inverters to the respective windings of the first and second stators are displaced by thirty electrical degrees to each other.