Abstract: A radial portion of a rotor is rotatably mounted to a stator and a cylindrical portion axially extends over radial teeth formed on the stator. A first surface of the first soft ferromagnetic material element is mounted to an inner surface of the cylindrical portion and a second surface of the first soft ferromagnetic material element has mounted on it a first magnet such that a surface of a pole of the first magnet is oriented substantially non perpendicular to a line from the centre of the rotor to the first magnet. A first surface of a second soft ferromagnetic material element is mounted to the first magnet such that the first magnet is sandwiched between the first and second soft ferromagnetic material elements. A second surface of the second soft ferromagnetic material element is substantially perpendicular to the line from the centre of the rotor to the first magnet.

Abstract: A rotor for an electric motor or generator, the rotor comprising a radial portion, a cylindrical portion, a first soft ferromagnetic material element, and a second soft ferromagnetic material element, wherein the radial portion is arranged to be rotatably mounted to a stator and the cylindrical portion is arranged to axially extend over radial teeth formed on the stator when the rotor is rotatably mounted to the stator, wherein a first surface of the first soft ferromagnetic material element is mounted to an inner surface of the cylindrical portion and a second surface of the first soft ferromagnetic material element is arranged to have mounted on it a first magnet such that a surface of a pole of the first magnet is oriented substantially non perpendicular to a line from the centre of the rotor to the first magnet, wherein a first surface of the second soft ferromagnetic material element is arranged to be mounted to the first magnet such that the first magnet is sandwiched between the first soft ferromagneti

Abstract: An electric motor or generator system comprising a stator, a rotor, a first bearing, a first coupling device and a second coupling device, wherein the second coupling device includes a first coupling element arranged to be coupled to a vehicle and a second coupling element coupled to the rotor with a second bearing mounted between the first coupling element and the second coupling element to allow the rotor to rotate relative to the vehicle, wherein the first bearing is mounted between a surface of the stator and a surface of the rotor or the second coupling element to allow the rotor to rotate relative to the stator and the first coupling device is arranged to substantially preventing movement of the stator relative to the first coupling element in a first degree of freedom while allowing movement of the stator relative to the first coupling element in at least a second degree of freedom.

Abstract: An electric motor or generator system comprising a stator, a rotor, a first bearing, a first coupling device and a second coupling device, wherein the second coupling device includes a first coupling element arranged to be coupled to a vehicle and a second coupling element coupled to the rotor with a second bearing mounted between the first coupling element and the second coupling element to allow the rotor to rotate relative to the vehicle, wherein the first bearing is mounted between a surface of the stator and a surface of the rotor or the second coupling element to allow the rotor to rotate relative to the stator and the first coupling device is arranged to substantially preventing movement of the stator relative to the first coupling element in a first degree of freedom while allowing movement of the stator relative to the first coupling element in at least a second degree of freedom.

Abstract: A cooling system for a vehicle having an engine and an electric motor, wherein the electric motor is arranged to generate a motor torque for driving the vehicle, the cooling system comprising means for transferring heat energy between the motor cooling means and the engine cooling means upon the occurrence of a predetermined criteria, wherein the motor cooling means is for controlling the temperature of the electric motor and the engine cooling means is for controlling the temperature of the engine.