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Squirrel-cage rotors and methods of manufacturing same

A squirrel-cage rotor and rotor guide bar technology is applied in the field of manufacturing squirrel-cage rotors of electric motors, which can solve the problems of mold wear, affecting the integrity of rotor guide bars and end rings, and expensive die-casting rotor bars and end rings.

Inactive Publication Date: 2010-01-13
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shrink holes affect the integrity of the rotor bars and end rings
Additionally, it is more expensive to die cast rotor bars and end rings in the same set of molds and there is generally die wear when the die cast rotor assembly is removed from the mold

Method used

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  • Squirrel-cage rotors and methods of manufacturing same
  • Squirrel-cage rotors and methods of manufacturing same
  • Squirrel-cage rotors and methods of manufacturing same

Examples

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Embodiment Construction

[0017] The ensuing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application or uses. For reasons of clarity, the same reference numbers will be used in the drawings to identify the same elements.

[0018] A method of manufacturing a squirrel cage rotor in accordance with the teachings of the present invention includes inserting a plurality of preformed rotor bars into a lamination, followed by die casting of the end rings. The rotor bars and end rings are manufactured by different manufacturing methods, resulting in a greater choice of suitable materials and reduced molding costs.

[0019] now refer to figure 1 and 2 An exemplary squirrel cage rotor 10 for an electric induction machine includes laminations 14 , a plurality of rotor bars 16 inserted into the laminations 14 , and a pair of end rings 18 provided at the longitudinal ends of the laminations 14 . Laminations 14 may be mounted around ...

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PUM

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Abstract

A method of manufacturing a squirrel-cage rotor includes: providing a laminated stack; attaching a plurality of rotor bars to the laminated stack, wherein the plurality of rotor bars each include opposite longitudinal ends; and die-casting a pair of end rings at the longitudinal ends of the plurality of rotor bars.

Description

[0001] Cross References to Related Applications [0001] This application claims the benefit of US Provisional Application No. 61 / 079,192, filed July 9, 2008. The disclosures of the aforementioned applications are hereby incorporated by reference. technical field [0002] This invention relates to electric induction machines, and more particularly to methods of making squirrel-cage rotors for electric motors. Background technique [0003] The background description given herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors that is described in the Background section, and that section of the Specification that may not have constituted prior art at the time of filing, is neither expressly nor impliedly admitted to be prior art to the present invention. [0004] The squirrel-cage rotor of an electro-induction machine may include laminations defining a plurality of elongated slots. A plurality of rotor bar...

Claims

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Application Information

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IPC IPC(8): H02K15/02H02K17/16
CPCB22D19/0054H02K15/0012Y10T29/49012
Inventor T·J·阿尔费尔曼A·L·小麦格鲁A·M·埃尔-安塔布利
Owner GM GLOBAL TECH OPERATIONS LLC