Jaguar Land Rover Limited

Jose Soler

Alexandros Michaelides

Xavier Vinamata

Istvan Kiraly

Mike Richardson

The present disclosure relates to an electric drive motor () for a vehicle. The electric drive motor () has a stator () having a plurality of slots (); and a rotor () having a plurality of poles (). The poles () each have at least a first permanent magnet () centred on a d-axis of the pole (); and a plurality of flux barriers () for disrupting at least an n-th order torque harmonic of the electric drive motor (). Proximal to an outer surface of the rotor (), a first angular period (x11) between first and secondary flux barriers is defined by the equation (xi1=tao/n1), whereby: (xi1) is the first angular period; (tao) is the pole step; and n1 is an order number of a torque harmonic to be disrupted.

Electric drive motor

In one aspect of the invention for which protection is sought there is provided an electric machine comprising a substantially circular rotor and a stator, wherein the stator comprises at least one substantially arcuate segment. Aspects of the invention also relate to a stator segment comprising at least one inter-pole shield disposed between adjacent teeth. Further aspects of the invention also relate to a stator segment having a first shield disposed at a first circumferential end thereof and/or a second shield disposed at a second circumferential end thereof. Aspects of the invention also relate to a stator segment having a radially outwardly directed protuberance.

Electric machine and method of operation thereof

The present application relates to an electric machine () including a rotor () and a stator (). The stator has a first set of teeth and each tooth in the first set has a first winding () The stator also has a second set of teeth and each tooth in the second set has a second winding (). The first winding () has a first winding count and the second winding () has a second winding count. The first and second winding counts are different from each other. The electric machine has particular application in cranking an internal combustion engine. The present application also relates to a related control apparatus () and a vehicle.

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Coventry, United Kingdom

Jose Soler