Rotor with a cover plate for securing a magnet in the rotor

A rotor for rotation about a centre axis in an electrical motor, the rotor comprising:

• a core made of a magnetically conductive material,
• a magnet located in a cavity in the core, the cavity having a first cross-sectional area and allows insertion of the magnet into the cavity via an opening in an end face of the core, and
• an end plate which covers the end face, the end plate having an aperture with a second cross-sectional area,
• wherein aperture is provided such that a first portion of the opening into the cavity is in communication with the aperture and such that a remaining, second, portion of the cavity is covered by the end plate to secure the magnet in the cavity independently upon the orientation of the end plate around the centre axis.