Unlock instant, AI-driven research and patent intelligence for your innovation.

Electric machine with in-slot stator cooling

A stator and coolant technology, which is used in motors, synchronous motors with stationary armatures and rotating magnets, and the arrangement of cooling combined power units, and can solve problems such as insulation degradation and heat generation.

Pending Publication Date: 2021-05-11
GM GLOBAL TECH OPERATIONS LLC
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aforementioned stator windings are sufficiently insulated to ensure galvanic isolation of the individual phase windings, however, heat is still generated during continuous high power operation
Heat generated by copper and iron losses in the stator may eventually degrade the insulation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric machine with in-slot stator cooling
  • Electric machine with in-slot stator cooling
  • Electric machine with in-slot stator cooling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] Referring to the drawings, an electric propulsion system 10 is schematically depicted in the several views in which like reference numerals designate the same or similar components. figure 1 middle. The electric propulsion system 10 includes a rotating electric machine 12 having a rotor assembly (“R”) 14 and a stator (“S”) 16 . The stator 16 generates heat during the continuous high power / high torque mode of operation of the electric machine 12 . Accordingly, the present teachings aim to achieve efficient real-time forced convection based cooling of the stator 16 using the coolant manifold 60A as set forth herein.

[0060] An application-appropriate coolant 21 (eg, automatic transmission fluid (“ATF”) or a diluted glycol blend) may be stored in a sump 22 and circulated using a coolant pump (“P”) 20 , producing F indicates the flow of coolant 21 . Coolant 21 is directed into coolant manifold 60A, which in turn seals against stator 16 . Coolant manifold 60A directs co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A rotary electric machine includes a rotor assembly, a stator, stator windings, and a coolant manifold. The rotor assembly includes a rotor and a rotor shaft. The stator is spaced apart from the rotor by a stator-rotor airgap and has stator teeth defining enclosed stator slots. Distal ends of adjacent stator teeth are joined together or integrally formed such that the enclosed stator slots are not contiguous with the airgap. The stator windings constructed from hairpin or bar-type conductors extend axially through the stator within the enclosed stator slots. The coolant manifold is in fluid communication with a coolant supply and configured to seal against an axial end surface of the stator to enclose a portion of the stator windings. The manifold receives and directs coolant from the coolant supply into the enclosed stator slots through the axial end surface to cool the stator via forced convection.

Description

technical field [0001] The present disclosure relates to an electric machine with in-slot stator cooling. Background technique [0002] Electric traction motors and motor generators, commonly referred to in the art as rotating electrical machines, are used to perform work in various electromechanical systems. Such machines include a rotating member, ie a rotor, spaced a short distance from a stationary member or stator. In a typical stator construction, a plurality of stator teeth are attached at one end to a cylindrical stator core to project radially towards the rotor. Adjacent stator teeth are separated from each other by respective stator slots, wherein the distal ends of adjacent stator teeth are spaced from each other by tooth gaps. Each stator slot is filled with wire or solid strip segments to form a set of stator windings. In a polyphase rotating electric machine, an alternating current ("AC") input voltage is applied to the stator windings to energize the stator...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/20H02K3/24
CPCH02K1/20H02K3/24H02K9/19B60L53/22Y02T10/64Y02T10/70Y02T10/7072Y02T90/14Y02T90/16B60L2240/425B60K1/00B60K11/02H02K1/16H02K1/276H02K7/006B60L2210/10H02K21/14H02K11/33
Inventor T·W·内尔F·萨米A·法特米D·F·拉尔T·R·胡夫曼
Owner GM GLOBAL TECH OPERATIONS LLC