US 2026/0074575 A1 · Integrated Cooling Channels for Stators

Abstract

A cooling system includes cooling channels integrated into the laminations of a stator, where the laminations are stacked together to form the stator core. The stator has multiple stator slots, and multiple windings extending through the stator slots. The geometry of the cooling channels varies through different groups of the stator laminations. This facilitates the cooling channels being closer to the primary heat source, which are the stator windings, located in the stator slots. The coolant enters the stator geometry via one or multiple inlets on the outer surface of the electric motor, and the cooling channels are shaped such that the coolant is simultaneously distributed radially and axially. The coolant exits the cooling channels from both axial faces through one or multiple outlets, and makes contact with the end windings.

Claims25

Dependent claims

An apparatus, comprising:

a cooling system for a stator of an electric motor, the cooling system comprising:
a plurality of laminations stacked together to form a stator having an axis;
at least one circumferential channel integrally formed as part of a housing of the stator;
at least one distribution element connected to and in fluid communication with the at least one circumferential channel, the at least one distribution element further comprising:
a first inlet channel connected to and in fluid communication with the at least one circumferential channel such that the first inlet channel protrudes away from the at least one circumferential channel towards the axis of the stator;
and
a first distribution channel connected to and in fluid communication with the first inlet channel;
wherein the at least one distribution element is integrally formed as part of the plurality of laminations.

5 more elements

A cooling system for a stator of an electric motor, the cooling system comprising:

a plurality of laminations stacked together to form a stator having an axis;
an outer inlet channel;
a first circumferential channel in fluid communication with the outer inlet channel;
a transition channel in fluid communication with the first circumferential channel;
a second circumferential channel in fluid communication with the transition channel;
a first plurality of distribution elements, each of the first plurality of distribution elements connected to and in fluid communication with the second circumferential channel;
and
a second plurality of distribution elements, each of the second plurality of distribution elements connected to and in fluid communication with the second circumferential channel;
wherein the second circumferential channel, the first plurality of distribution elements, and the second plurality of distribution elements are integrally formed as part of the plurality of laminations.

6 more elements

Dependencies are inferred from the claim text.

Integrated Cooling Channels for Stators

Life of this patent

Integrated Cooling Channels for Stators

Life of this patent

Abstract

Claims25