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Title: Halbach array DC motor/generator

Abstract

A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.

Inventors:
 [1];  [1];  [2]
  1. Livermore, CA
  2. Walnut Creek, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871313
Patent Number(s):
5705902
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
halbach; array; dc; motor; generator; configuration; based; permanent; magnets; ferrous; materials; losses; winding; due; bearings; windage; inside-out; design; compared; conventional; rotating; portion; rotor; outside; machine; stationary; stator; formed; inside; contains; provide; uniform; field; windings; placed; switched; commutated; commutation; performed; mechanical; means; brushes; electronic; switching; circuits; useful; electric; vehicles; adjustable; speed; drives; stator windings; rotating portion; losses due; stator winding; electric vehicle; permanent magnet; permanent magnets; switching circuit; dc motor; electronic means; electric vehicles; mechanical means; stationary portion; adjustable speed; uniform field; halbach array; /318/310/

Citation Formats

Merritt, Bernard T, Dreifuerst, Gary R, and Post, Richard F. Halbach array DC motor/generator. United States: N. p., 1998. Web.
Merritt, Bernard T, Dreifuerst, Gary R, & Post, Richard F. Halbach array DC motor/generator. United States.
Merritt, Bernard T, Dreifuerst, Gary R, and Post, Richard F. Thu . "Halbach array DC motor/generator". United States. https://www.osti.gov/servlets/purl/871313.
@article{osti_871313,
title = {Halbach array DC motor/generator},
author = {Merritt, Bernard T and Dreifuerst, Gary R and Post, Richard F},
abstractNote = {A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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