Cooling arrangement for an electrical machine
AssigneeABB AB
InventorsJouni Ikäheimo, Jere Kolehmainen, Jari Pekola, Tommi Ryyppö
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Abstract
A cooling arrangement is disclosed for an electrical machine in which the main cooling air circulation within the machine is arranged using a centrifugal blower in at least one of the ends of the machine, making the main cooling air circulation flow through at least an air space in the machine and the outer surface of the stator. A circulating fan is arranged in the immediate vicinity of the centrifugal fan for the purpose of generating a coil end circulation that circulates air at least in the area of the machine's coil ends.
Claims20
A cooling arrangement for an electrical machine in which the main cooling air circulation within the machine is arranged using a centrifugal fan at least in one of the ends of the machine, said electrical machine having a coil end extending out of the sheet pack and the main cooling air circulation flowing through at least an air space associated with the coil end and the outer surface of the stator, wherein the centrifugal fan is fitted into the air space associated with the coil end wherein a circulating fan is arranged in the immediate vicinity of the centrifugal fan for the purpose of generating a coil end circulation that circulates air at least in the area of the machine's coil ends.
Dependencies are inferred from the claim text.