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Title: Micro-channel heat exchanger integrated into stator core of electrical machine

Patent ·
OSTI ID:1532164

An electric machine has a stator that comprises a plurality of laminations with an outer periphery, and each of the laminations has teeth about a central opening such that when the laminations are stacked side-by side to form the stator core, the plurality of teeth of adjacent laminations cooperate to form slots disposed circumferentially about the central opening that are configured to receive a plurality of stator windings. Each of the laminations has a plurality of cooling apertures angularly spaced about the central opening. The cooling apertures of adjacent laminations cooperate to form cooling manifolds that extend along a length of the stator core. A portion of the laminations has their cooling apertures offset from other laminations in the stack in a manner to create a plurality of flow path transverse to the manifolds and angularly between laminations and adjacent manifolds.

Research Organization:
Baldor Electric Company, Fort Smith, AR (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AR0000191
Assignee:
Baldor Electric Company (Fort Smith, AR)
Patent Number(s):
9,362,788
Application Number:
13/827,560
OSTI ID:
1532164
Resource Relation:
Patent File Date: 2013-03-14
Country of Publication:
United States
Language:
English

References (10)

Motor/generator with equalized coolant distribution patent February 2003
Rotary Electric Machine with Improved Cooling Capability patent-application December 2011
Stator Assembly for Use in a Fluid-Cooled Motor and Method of Making the Same patent-application November 2008
Lamination cooling system formation method patent-application February 2006
Housing Attachment for an Electrical Machine to Ingress Protection Class IP 24W patent-application February 2011
Lamination stack cooling path patent-application January 2007
Stator cooling method and apparatus patent-application March 2005
Lamination cooling system formation method patent May 2009
Electric motor assemblies with coolant flow for concentrated windings patent May 2009
Coolant Channels for Electric Machine Stator patent-application April 2012