US 7,411,323 B2 · Electrical machine having cooled laminated stator and rotor cores and windings

Abstract

High-power electric machines must be intensively cooled. At the same time, it is necessary to ensure a high level of immunity to impurities. For this purpose, the rotor and stator sheet packs (41, 42, 61, 62) are embodied in two parts, thereby making it possible to carry out a two-sided ventilation, said parts being maintained separately in the middle by a ring (5, 7). Said ring (5, 7) is provided with ribs (51, 52, 71, 72) in such a way that radial flow channels are formed between partial sheet stacks and ensure corresponding flow rate. In another embodiment, monoblock sheet stacks are provided with cooling channel extensions on either side of the sheet stack. Said cooling extensions alternate on the axial cooling channels in the peripheral direction and transport heated coolant outwards in respectively opposite directions.

Claims7

Dependent claims

An electrical machine, comprising:

a housing;
a laminated stator core arranged in the housing and terminating in an end winding area;
and
a laminated rotor core arranged in the housing and terminating in an end winding area,
wherein at least one member selected from the group consisting of the laminated stator core and the laminated rotor core has an axial cooling channel,
wherein at least one of the end winding areas accommodates an open-ended cooling channel protrusion fluidly extending the cooling channel of the member in axial prolongation for allowing a discharge of coolant in axial direction from the housing to the outside.

3 more elements

Dependencies are inferred from the claim text.

Electrical machine having cooled laminated stator and rotor cores and windings

Life of this patent

Electrical machine having cooled laminated stator and rotor cores and windings

Life of this patent

Abstract

Claims7