Bearing arrangement

An electric machine comprising:

• a bearing arrangement having a first and a second support structure for supporting a rotating member, the rotating member having a main axis of rotation (R), wherein the first support structure is configured to rotate with the rotating member, and the second support structure is fixed and configured to be non-rotatably mounted to a frame,
• a first rolling bearing supporting the first support structure in relation to the second support structure at a first support location,
• a second rolling bearing supporting the first support structure in relation to the second support structure at a second support location, wherein the first and second rolling bearings are arranged in a coaxial configuration in relation to each other, wherein
• the first rolling bearing forms a radially outer bearing, and the second rolling bearing is arranged radially inside the first rolling bearing by a bearing radial distance (A), wherein
• the first support location and the second support location are axially aligned, and wherein
• the frame forms an electric machine housing,
• the first support structure forms parts of a rotor of the electric machine, and
• the electric machine further comprises a stator attached to the electric machine housing, that cooperates with the rotor during operation.

A method for manufacturing a bearing arrangement having a main axis of rotation, the method comprising:

• providing a first support structure for supporting a rotating member and arranging the first support structure to rotate with the rotating member,
• providing a second support structure for supporting the rotating member, and arranging the second support structure to be non-rotatably mounted to a frame,
• providing a first rolling bearing and arranging it to support the first support structure in relation to the second support structure at a first support location (101), and
• providing a second rolling bearing and arranging it to support the first support structure in relation to the second support structure at a second support location (201),
• arranging the first and second rolling bearings in a coaxial configuration in relation to each other,
• arranging the first rolling bearing as a radially outer bearing,
• providing the second rolling bearing radially inside the first rolling bearing by a bearing radial distance (A), and
• axially aligning the first support location and second support location in relation to each other.