METHOD FOR COOLING A STACK OF METAL SHEETS, STACK OF METAL SHEETS, ROTOR, STATOR AND ELECTRIC MACHINE

摘要

The invention relates to a laminated core (100), a rotor, a stator and an electric machine and a method for cooling a laminated core 100. The laminated core (100) consists of metal sheets (1) or sheet metal segments (1a). The sheets (1) or the sheet metal segments (1a) have recesses (3a, 5a, 11a, 12a, 13a), wherein the recesses (3a, 5a, 11a, 12a, 13a) after joining the sheets (1) or the sheet metal segments (1a) to form the laminated core (100) channels for the cooling medium (K). Characteristic of the channels (3, 5, 11, 12, 13) is that in a yoke region (9) of the laminated core (100) inlet channels (3) and return channels (5) from the recesses (3a, 5a, 11a, 12a, 13a) are formed, that further channels (11, 12, 13) parallel to the inlet and return channels (3, 5) extend and that the other channels (11, 12, 13) located in the teeth of the laminated core (100) are. By the invention, the inner region of the laminated core (100) can be cooled directly and by the construction of each same sheet metal (segments) (1, 1a), the production can be greatly reduced by the same sheet (segments) (1, 1a ) are rotationally offset to one another.