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Title: High strength undiffused brushless machine and method

Abstract

A method and apparatus in which a rotor (11) and a stator (17) define a radial air gap (20) for receiving AC flux and at least one DC excitation coil (23, 24) positioned near the stator end turn to produce DC flux in axial air gaps (21, 22) additive to the AC flux. Side magnets (16) and flux-guiding magnets (14) are provided as boundaries separating the side poles (12a, 12b) of opposite polarity from other portions of the rotor (11) and from each other to define PM poles (12a, 12b) for conveying the DC flux to or from the primary air gap (20) and for inhibiting flux from leaking from said pole portions prior to reaching the primary air gap (20). Side magnets (16), side poles (12a and 12b), flux-guiding magnets (14), ferromagnetic end plates (11c), non-magnetic end plates (12c), and ring bands (37) are optionally provided for performance improvement.

Inventors:
 [1]
  1. Oak Ridge, TN
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
986577
Patent Number(s):
7,518,278
Application Number:
11/162,753; TRN: US201018%%44
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ELECTRIC MOTORS; MAGNETS; PERFORMANCE; PLATES; ROTORS; STATORS; DESIGN

Citation Formats

Hsu, John S. High strength undiffused brushless machine and method. United States: N. p., 2009. Web.
Hsu, John S. High strength undiffused brushless machine and method. United States.
Hsu, John S. Tue . "High strength undiffused brushless machine and method". United States. https://www.osti.gov/servlets/purl/986577.
@article{osti_986577,
title = {High strength undiffused brushless machine and method},
author = {Hsu, John S},
abstractNote = {A method and apparatus in which a rotor (11) and a stator (17) define a radial air gap (20) for receiving AC flux and at least one DC excitation coil (23, 24) positioned near the stator end turn to produce DC flux in axial air gaps (21, 22) additive to the AC flux. Side magnets (16) and flux-guiding magnets (14) are provided as boundaries separating the side poles (12a, 12b) of opposite polarity from other portions of the rotor (11) and from each other to define PM poles (12a, 12b) for conveying the DC flux to or from the primary air gap (20) and for inhibiting flux from leaking from said pole portions prior to reaching the primary air gap (20). Side magnets (16), side poles (12a and 12b), flux-guiding magnets (14), ferromagnetic end plates (11c), non-magnetic end plates (12c), and ring bands (37) are optionally provided for performance improvement.},
doi = {},
url = {https://www.osti.gov/biblio/986577}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {4}
}

Patent:

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