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Title: Permanent magnet energy conversion machine with magnet mounting arrangement

Abstract

A hybrid permanent magnet dc motor includes three sets of permanent magnets supported by the rotor and three sets of corresponding stators fastened to the surrounding frame. One set of magnets operates across a radial gap with a surrounding radial gap stator, and the other two sets of magnets operate off the respective ends of the rotor across respective axial gaps.

Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Publication Date:
Research Org.:
LOCKHEED MARTIN ENERGY RES COR
OSTI Identifier:
872517
Patent Number(s):
US 5952756
Assignee:
Lockheed Martin Energy Research Corporation (Oak Ridge, TN) ORNL
DOE Contract Number:
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
permanent; magnet; energy; conversion; machine; mounting; arrangement; hybrid; dc; motor; sets; magnets; supported; rotor; corresponding; stators; fastened; surrounding; frame; set; operates; radial; gap; stator; operate; respective; axial; gaps; permanent magnet; permanent magnets; energy conversion; dc motor; radial gap; net energy; mounting arrangement; axial gap; /310/

Citation Formats

Hsu, John S., and Adams, Donald J.. Permanent magnet energy conversion machine with magnet mounting arrangement. United States: N. p., 1999. Web.
Hsu, John S., & Adams, Donald J.. Permanent magnet energy conversion machine with magnet mounting arrangement. United States.
Hsu, John S., and Adams, Donald J.. 1999. "Permanent magnet energy conversion machine with magnet mounting arrangement". United States. doi:. https://www.osti.gov/servlets/purl/872517.
@article{osti_872517,
title = {Permanent magnet energy conversion machine with magnet mounting arrangement},
author = {Hsu, John S. and Adams, Donald J.},
abstractNote = {A hybrid permanent magnet dc motor includes three sets of permanent magnets supported by the rotor and three sets of corresponding stators fastened to the surrounding frame. One set of magnets operates across a radial gap with a surrounding radial gap stator, and the other two sets of magnets operate off the respective ends of the rotor across respective axial gaps.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month = 1
}

Patent:

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  • A hybrid permanent magnet dc motor includes three sets of permanent magnets supported by the rotor and three sets of corresponding stators fastened to the surrounding frame. One set of magnets operates across a radial gap with a surrounding radial gap stator, and the other two sets of magnets operate off the respective ends of the rotor across respective axial gaps.
  • An electro-mechanical energy conversion system coupled between an energy source and an energy load comprising an energy converter device including a permanent magnet induction machine coupled between the energy source and the energy load to convert the energy from the energy source and to transfer the converted energy to the energy load and an energy transfer multiplexer to control the flow of power or energy through the permanent magnetic induction machine.
  • The present invention is directed to a mounting arrangement for the drive system of an air-bearing spindle utilized on a machine tool such as a lathe. The mounting arrangement of the present invention comprises a housing which is secured to the casing of the air bearing in such a manner that the housing position can be selectively adjusted to provide alignment of the air-bearing drive shaft supported by the housing and the air-bearing spindle. Once this alignment is achieved the air between spindle and the drive arrangement is maintained in permanent alignment so as to overcome misalignment problems encountered inmore » the operation of the machine tool between the air-bearing spindle and the shaft utilized for driving the air-bearing spindle.« less
  • This patent describes, in combination, a land vehicle having axially aligned ground engaging tractive wheels, and a drivetrain carried by the vehicle for the propulsion thereof. The drivetrain comprises: (a) a substantially fixed DC power source including at least one chemical battery, (b) transmission means including selectable multiple gear ratios, an input shaft and a mechanical differential operative to transfer torque to the wheels, (c) a single-phase self-synchronous permanent magnet motor including, (i) an elongated central shaft, (ii) a generally u-shaped frame assembly adapted for mechanical grounding the shaft to a relatively stationary portion of the vehicle, the shaft beingmore » secured to the frame proximate each end thereof, (iii) a stator assembly secured to the shaft and characterized by a plurality of outwardly directed integrally formed salient poles and associated bifilar-wound induction coils, and (iv) a rotor assembly rotatably disposed on the shaft and substantially enclosing the stator assembly, the rotor assembly comprising a cylindrical shell defining an inner surface.« less
  • 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 gapmore » (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).« less