The invention relates to a rotor for an electric machine, comprising at least one first (22) and a second (32) conductor end and a contact element, which provides a connection between the at least two conductor ends (22, 32), and wherein the contact element can be positioned along a rotor axis (R) of the rotor in such a way that the connection can be established in an intermediate position, which is offset away from the rotor in relation to an end position of the contact element.

The invention relates to a rotor for an electric machine, comprising at least one first (22) and a second (32) conductor end and a contact element, which provides a connection between the at least two conductor ends (22, 32), and wherein the contact element can be positioned along a rotor axis (R) of the rotor in such a way that the connection can be established in an intermediate position, which is offset away from the rotor in relation to an end position of the contact element.

A female contact element for a slip ring motor with a power output >1 MW. The female contact element is configured for engagement with a male contact element to make an electrical connection between the female contact element and the male contact element. The female contact element is made of a CuBe-alloy.

A female contact element for a slip ring motor with a power output >1 MW. The female contact element is configured for engagement with a male contact element to make an electrical connection between the female contact element and the male contact element. The female contact element is made of a CuBe-alloy.

A method and a device for protecting an electric motor in a pod unit for propulsion of marine vessels against shaft bending shocks when the blades of the pod propeller hit ice blocks or other hard objects, said motor having a drive shaft, a rotor and a stator, said shocks tending to momentarily bend the drive shaft (3) to such an extent that the rotor (41) will come into contact with the stator. The rotor is prevented from coming in detrimental contact with the stator by providing at least two members, which together form a radial plain bearing having mating arcuate bearing surfaces, which during normal operation of the motor are spaced from one another by a gap and come in contact with one another only at extreme loads with short durations.

Described herein is a rotating electrical machine, set of such machines, and associated boat and rolling mill. The rotating electrical machine includes a stator, a shaft centered in the stator, a first cylindrical magnetic mass and a second cylindrical magnetic mass, the first cylindrical magnetic mass and the second cylindrical magnetic mass enclosing the shaft and arranged in series on the shaft, the first cylindrical magnetic mass and the second cylindrical magnetic mass being separated by an air gap, the stator including coils, each coil being opposite to the two cylindrical magnetic masses. Each cylindrical magnetic mass includes a stack of compacted laminated magnetic sheets, first fastening means configured to fix the first cylindrical magnetic mass and the shaft, and second fastening means configured to fix the second cylindrical magnetic mass and the shaft.

A rotor of an asynchronous machine with a cage rotor includes a laminated core formed from a plurality of partial laminated cores. The laminated core has substantially axially extending conductors arranged in slots in the laminated core. The conductors include at least two materials of different electrical conductivities, such that a material with a higher electrical conductivity surrounds a material with a lower electrical conductivity by at least 65% in a circumferential direction.

A rotor of an asynchronous machine with a cage rotor includes a laminated core formed from a plurality of partial laminated cores. The laminated core has substantially axially extending conductors arranged in slots in the laminated core. The conductors include at least two materials of different electrical conductivities, such that a material with a higher electrical conductivity surrounds a material with a lower electrical conductivity by at least 65% in a circumferential direction.

A rotor of an asynchronous machine with a cage rotor includes a laminated core formed from a plurality of partial laminated cores. The laminated core has substantially axially extending conductors arranged in slots in the laminated core. The conductors include at least two materials of different electrical conductivities, such that a material with a higher electrical conductivity surrounds a material with a lower electrical conductivity by at least 65% in a circumferential direction.

A rotor of an asynchronous machine with a cage rotor includes a laminated core formed from a plurality of partial laminated cores. The laminated core has substantially axially extending conductors arranged in slots in the laminated core. The conductors include at least two materials of different electrical conductivities, such that a material with a higher electrical conductivity surrounds a material with a lower electrical conductivity by at least 65% in a circumferential direction.