Title:
MOTOR/GENERATOR
Document Type and Number:
WIPO Patent Application WO1998026495
Kind Code:
A3
Abstract:
An axial field motor/generator having a rotor that includes at least three annular discs magnetized to provide multiple sector-shaped poles. Each sector has a polarity opposite that of an adjacent sector, and each sector is polarized through the thickness of the disc. The poles of each magnet are aligned with opposite poles of each adjacent magnet. Metal members adjacent the outermost two magnets contain the flux. The motor/generator also has a stator that includes a stator assembly between each two adjacent magnets. Each stator assembly includes one or more conductors or windings. Although the conductors may be formed of wire having a round, uniform cross-section, they may alternatively be formed of conductors having a tapered cross-section that corresponds to the taper of the sectors in order to maximize the density of the conductor in the gap between axially adjacent poles. The conductors may also alternatively be formed of traces in a printed circuit, which may have one or more layers. Each stator assembly may be removably connectable to another stator assembly to provide modularity in manufacturing and to facilitate selection of the voltage at which the motor/generator is to operate. Electrical contacts, such as pins extending from the casing, may removably connect the conductors of adjacent stator assemblies. A magnet may be dynamically balanced on the shaft by hardening a thin ring-of cross-linked resin between the magnet and the shaft while the shaft is spun, using ultraviolet light to polymerize the resin.
Inventors:
SMITH STEPHEN H (US)
SHENKAL YUVAL (US)
SHENKAL YUVAL (US)
Application Number:
PCT/US1997/022555
Publication Date:
October 22, 1998
Filing Date:
December 08, 1997
Export Citation:
Assignee:
ADVANCED TECHNOLOGIES INTERNAT (BS)
SMITH STEPHEN H (BS)
SHENKAL YUVAL (BS)
SMITH STEPHEN H (BS)
SHENKAL YUVAL (BS)
International Classes:
H02K1/27; H02K3/04; H02K29/00; H02K3/26; H02K3/28; H02K3/34; H02K3/46; H02K3/47; H02K15/03; H02K15/16; H02K16/00; H02K21/24; H02K1/02; H02K29/08; (IPC1-7): H02K21/24; H02K3/26; H02K3/04
Domestic Patent References:
| WO1994009549A1 | 1994-04-28 |
Foreign References:
| GB2256091A | 1992-11-25 | |||
| US3219861A | 1965-11-23 | |||
| FR2639486A1 | 1990-05-25 | |||
| US3375386A | 1968-03-26 | |||
| GB2090478A | 1982-07-07 | |||
| FR2606951A1 | 1988-05-20 | |||
| EP0162927A1 | 1985-12-04 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 18, no. 271 (C - 1203) 24 May 1994 (1994-05-24)
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