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Title: High speed internal permanent magnet machine and method of manufacturing the same

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 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 permanent magnets for generating a magnetic field, which interacts with the stator magnetic field to produce torque. The permanent magnets are disposed between the stacks. The rotor assembly also includes multiple bottom wedges disposed on the bottom structures of the shaft and configured to hold the multiple stacks and the multiple permanent magnets.

Inventors:
 [1];  [2];  [3];  [4];  [5]
  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:
1027262
Patent Number(s):
8018110
Application Number:
12/432,885
Assignee:
NETL
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
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. High speed internal permanent magnet machine and method of manufacturing the same. United States: N. p., 2011. Web.
Alexander, James Pellegrino, EL-Refaie, Ayman Mohamed Fawzi, Lokhandwalla, Murtuza, Shah, Manoj Ramprasad, & VanDam, Jeremy Daniel. High speed internal permanent magnet machine and method of manufacturing the same. United States.
Alexander, James Pellegrino, EL-Refaie, Ayman Mohamed Fawzi, Lokhandwalla, Murtuza, Shah, Manoj Ramprasad, and VanDam, Jeremy Daniel. Tue . "High speed internal permanent magnet machine and method of manufacturing the same". United States. https://www.osti.gov/servlets/purl/1027262.
@article{osti_1027262,
title = {High speed internal permanent magnet machine and method of manufacturing the same},
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 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 permanent magnets for generating a magnetic field, which interacts with the stator magnetic field to produce torque. The permanent magnets are disposed between the stacks. The rotor assembly also includes multiple bottom wedges disposed on the bottom structures of the shaft and configured to hold the multiple stacks and the multiple permanent magnets.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {9}
}

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Works referenced in this record:

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