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Title: Permanent Magnet Machine And Method With Reluctance Poles For High Strength Undiffused Brushless Operation.

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, and preferably two, DC excitation assemblies (23, 24) are positioned at opposite ends of the rotor (20) to define secondary air gaps (21, 22). Portions of PM material (14a, 14b) are provided as boundaries separating the rotor pole portions (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 the pole portions prior to reaching the primary air gap (20). The portions of PM material (14a, 14b) are spaced from each other so as to include reluctance poles (15) of ferromagnetic material between the PM poles (12a, 12b) to interact with the AC flux in the primary-air gap (20).

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:
880729
Patent Number(s):
6,972,504
Application Number:
11/019075
Assignee:
UT-Battelle LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Hsu, John S. Permanent Magnet Machine And Method With Reluctance Poles For High Strength Undiffused Brushless Operation.. United States: N. p., 2005. Web.
Hsu, John S. Permanent Magnet Machine And Method With Reluctance Poles For High Strength Undiffused Brushless Operation.. United States.
Hsu, John S. Tue . "Permanent Magnet Machine And Method With Reluctance Poles For High Strength Undiffused Brushless Operation.". United States. https://www.osti.gov/servlets/purl/880729.
@article{osti_880729,
title = {Permanent Magnet Machine And Method With Reluctance Poles For High Strength Undiffused Brushless Operation.},
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, and preferably two, DC excitation assemblies (23, 24) are positioned at opposite ends of the rotor (20) to define secondary air gaps (21, 22). Portions of PM material (14a, 14b) are provided as boundaries separating the rotor pole portions (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 the pole portions prior to reaching the primary air gap (20). The portions of PM material (14a, 14b) are spaced from each other so as to include reluctance poles (15) of ferromagnetic material between the PM poles (12a, 12b) to interact with the AC flux in the primary-air gap (20).},
doi = {},
url = {https://www.osti.gov/biblio/880729}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {12}
}

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