Patent ID: 11909293
Assignee: ROLLS-ROYCE ELECTRICAL NORWAY AS
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A rotor sleeve for a rotor of an electric machine, the rotor sleeve defining a rotational axis and comprising:
a plurality of first layers of carbon fibre reinforced polymer, each first layer comprising fibres oriented between 89° and 90° to the rotational axis;
at least one second layer of fibres comprising one or more of glass fibre, aramid, ultra-high molecular weight polyethylene, nylon or poly(p-phenylene-2,6-benzobisoxaole) (PBO) within a matrix material, wherein:
the at least one second layer is provided between two layers of the plurality of first layers,
the fibres of the plurality of first fibers have a higher modulus of elasticity than the fibres of the at least one second layer, and
the fibres of the at least one second layer are oriented between 50° and 75° relative to the rotational axis.