Cage rotor comprising a deformable bearing

A laminated rotor core for a cage rotor, comprising:

• a plurality of plates placed adjacent to one another and defining a slot;
• and
• a deformable bearing configured to support a bar in the slot,
• wherein a magnetic interaction is established between the cage rotor and a winding of a stator thereby producing mechanical energy which causes the cage rotor to rotate,
• wherein the deformable bearing has two bearing devices which are axially spaced from each other and support the bar at a distance from a slot base, which distance has a constant dimension along an axial length of the slot,
• wherein the bearing devices have first and second bearing units formed in one piece with the laminated rotor core as immovable bearing units which are spaced axially from each other and from axial ends of the laminated rotor core,
• wherein the immovable bearing units extend permanently in a radial direction from the laminated core and have radially outer surfaces extending in an axial direction and, with the permanent radial extension of the immovable bearing units, supporting the bar in the slot.

An electric machine, comprising

• a cage rotor which includes a laminated rotor core having a slot, a short-circuit ring cast onto an axial end of the laminated rotor core and made of a first material, a bar, and a deformable bearing having a bearing device to support the bar in the slot, wherein a magnetic interaction is established between the cage rotor and a winding of a stator thereby producing mechanical energy which causes the cage rotor to rotate,
• wherein the deformable bearing has two bearing devices which are axially spaced from each other and support the bar at a distance from a slot base, which distance has a constant dimension along an axial length of the slot,
• wherein the bearing devices have first and second bearing units formed in one piece with the laminated rotor core as immovable bearing unit which are spaced axially from each other and from axial ends of the laminated rotor core,
• wherein the immovable bearing units extend permanently in a radial direction from the laminated core and have radially outer surfaces extending in an axial direction and, with the permanent radial extension of the immovable bearing units, supporting the bar in the slot.

A method for producing a laminated rotor core for a cage rotor, said method comprising:

• placing a plurality of plates in side-by-side arrangement to define a slot for receiving a bar;
• and
• forming a deformable bearing device by at least having two bearing devices formed by two of the plates to provide a support of the bar in the slot;
• and
• establishing a magnetic interaction between the cage rotor and a winding of a stator thereby producing mechanical enemy which causes the cage rotor to rotate,
• wherein the two be devices are axially spaced from each other and support the bar at a distance from a slot base, which distance has a constant dimension along an axial length of the slot,
• wherein the be devices have first and second bearing units formed in one piece with the laminated rotor core as immovable bearing units which are spaced axially from each other and from axial ends of the laminated rotor core,
• wherein the immovable bearing units extend permanently in a radial direction from the laminated core and have radially outer surfaces extending in an axial direction and, with the permanent radial extension of the immovable bearing units, supporting the bar in the slot.

A method for producing a cage rotor, said method comprising:

• producing a laminated rotor core from a plurality of plates;
• arranging a bar in a slot formed by the plates of the laminated rotor core;
• supporting the bar in the slot by a deformable bearing with a bearing device;
• casting a short-circuit ring on an axial end of the laminated rotor core, and
• establishing a magnetic interaction between the cage rotor and a winding of a stator thereby producing mechanical energy which causes the cage rotor to rotate,
• wherein the deformable bearing has two bearing devices which are axially spaced from each other and support the bar at a distance from a slot base, which distance has a constant dimension along an axial length of the slot,
• wherein the bearing devices have first and second bearing units formed in one piece with the laminated rotor core as immovable bearing units which are spaced axially from each other and from axial ends of the laminated rotor core,
• wherein the immovable bearing units extend permanently in a radial direction from the laminated core and have radially outer surfaces extending in an axial direction and, with the permanent radial extension of the immovable bearing units, supporting the bar in the slot.