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Title: Dovetail spoke internal permanent magnet machine

Abstract

An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft. The rotor assembly further includes multiple pair of permanent magnets for generating a magnetic field, which magnetic field interacts with the stator magnetic field to produce a torque. The multiple pair of permanent magnets are disposed between the stacks. The rotor assembly also includes multiple middle wedges mounted between each pair of the multiple permanent magnets.

Inventors:
 [1];  [2];  [3];  [4];  [5]
+ Show Inventor Affiliations
  1. Ballston Lake, NY
  2. Niskayuna, NY
  3. Clifton Park, NY
  4. Latham, NY
  5. West Coxsackie, NY
Issue Date:
Research Org.:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1023935
Patent Number(s):
8004140
Application Number:
12/432,894
Assignee:
General Electric Company (Niskayuna, NY)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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DOE Contract Number:  
FC26-07NT43122
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Alexander, James Pellegrino, EL-Refaie, Ayman Mohamed Fawzi, Lokhandwalla, Murtuza, Shah, Manoj Ramprasad, and VanDam, Jeremy Daniel. Dovetail spoke internal permanent magnet machine. United States: N. p., 2011. Web.
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Alexander, James Pellegrino, EL-Refaie, Ayman Mohamed Fawzi, Lokhandwalla, Murtuza, Shah, Manoj Ramprasad, & VanDam, Jeremy Daniel. Dovetail spoke internal permanent magnet machine. United States.
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Alexander, James Pellegrino, EL-Refaie, Ayman Mohamed Fawzi, Lokhandwalla, Murtuza, Shah, Manoj Ramprasad, and VanDam, Jeremy Daniel. Tue . "Dovetail spoke internal permanent magnet machine". United States. https://www.osti.gov/servlets/purl/1023935.
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@article{osti_1023935,
title = {Dovetail spoke internal permanent magnet machine},
author = {Alexander, James Pellegrino and EL-Refaie, Ayman Mohamed Fawzi and Lokhandwalla, Murtuza and Shah, Manoj Ramprasad and VanDam, Jeremy Daniel},
abstractNote = {An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft. The rotor assembly further includes multiple pair of permanent magnets for generating a magnetic field, which magnetic field interacts with the stator magnetic field to produce a torque. The multiple pair of permanent magnets are disposed between the stacks. The rotor assembly also includes multiple middle wedges mounted between each pair of the multiple permanent magnets.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {8}
}
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Works referenced in this record:

High-Speed Generators for Power-Dense, Medium-Power, Gas Turbine Generator Sets
journal, October 2007

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