Electric machine systems having magnetised bi-pole rotors

An electric machine system comprising:

• a first electric machine configured to drive a load drivingly coupled to a first shaft rotatable about an axis, the first electric machine having a plurality of magnetized bi-pole first rotors angularly spaced apart around the axis;
• a second electric machine configured to drive the load, the second electric machine having a plurality of magnetized bi-pole second rotors angularly spaced apart around the axis, at least one of the magnetized second rotors being coaxial with and angularly indexed relative to a respective one of the magnetized bi-pole first rotors to, in use, provide a torque phase offset between the first and second electric machines;
• and
• two or more second shafts coupled to the load, each second shaft of said two or more second shafts interconnecting a respective one of the magnetized bi-pole first rotors with a respective one of the magnetized bi-pole second rotors, the respective one of the magnetized bi-pole first rotors being coaxial with and axially spaced apart from the respective one of the magnetized bi-pole second rotors, said two or more second shafts being nonconcentric.