End plate for an electric machine, electric machine and method for assembling an electric machine

An end plate (30) for an electric machine (1), the end plate comprising:

• a magnetic bearing (80) configured to rotatably mount a rotor (20) of the electric machine (1);
• a bearing receptacle (40), configured to accommodate the magnetic bearing (80) therewithin;
• and
• a radially outer circumferential contour (50), on which at least three support elements (60, 70) are provided, each of which protrudes radially to the outside, with respect to the circumferential contour (50), by a protruding amount (M) so as to define a discontinuous outer circumferential contour of the end plate (30),
• wherein the respective protruding amounts (M) of the at least three support elements (60, 70) are dimensioned so that the end plate (30) is fitted in by making a center of the magnetic bearing (80) coincide with at least one of a geometrical longitudinal axis (A2) of the electric machine (1) and a magnetic longitudinal axis (A4) of the electric machine (1).

An electric machine (1) comprising:

• a stator (10) having a stator housing (11);
• a rotor (20) arranged in an inner circumference (12) of the stator housing (11);
• and
• an end plate (30) with a magnetic bearing (80) configured to rotatably mount the rotor (20), a bearing receptacle (40), configured to accommodate the magnetic bearing (80) therewithin, and a radially outer circumferential contour (50), on which at least three support elements (60, 70) are provided, each of which protrudes radially to the outside,
• wherein on a radially inner circumferential contour of the stator housing (11), and/or of a connecting housing (100), at least three support elements (60, 70) is provided, each of which protrudes radially to the inside, with respect to the respective circumferential contour, by a protruding amount (M) so as to define a discontinuous inner circumferential contour of the stator housing (11) and/or of the connecting housing (100), and
• wherein the respective protruding amounts (M) of the support elements (60, 70) are dimensioned so that the end plate (30) is fitted by making a center of the magnetic bearing (80) coincide with at least one of a geometrical longitudinal axis (A2) of the electric machine (1) and a magnetic longitudinal axis (A4) of the electric machine (1).