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Title: US5436518: Motive power generating device
[ Derwent Title ]


Country: US United States of America

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29 pages

 
Inventor: Kawai, Teruo; Tokyo, Japan

Assignee: Nihon Riken Co., Ltd., Tokyo, Japan
Kawai; Teruo, Tokyo, Japan
other patents from NIHON RIKEN CO., LTD. (713203) (approx. 6)
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Published / Filed: 1995-07-25 / 1993-06-17

Application Number: US1993000079120

IPC Code: Advanced: H02K 21/20; H02K 29/10; H02K 41/02; H02K 41/06;
IPC-7: H02K 7/02; H02K 7/075;

ECLA Code: H02K21/20; H02K29/10; H02K41/02; H02K41/06;

U.S. Class: Current: 310/156.18; 310/068.B; 310/156.62; 310/156.64; 318/135;
Original: 310/156; 310/068.B; 318/135;

Field of Search: 310/68 R,68 B,70 R,152,156,184,12,81 318/498,135

Priority Number:
1993-06-17  US1993000079120
1992-01-03  US1992000816821

Abstract:     A motive power generating device comprises a permanent magnet disposed around a rotational output shaft for rotation therewith, the output shaft being mounted on a support member for rotation, a magnetic body disposed in concentric relationship with the permanent magnet for rotation with the rotational output shaft, the magnetic body being subjected to magnetic flux generated by the permanent magnet, a plurality of electromagnets fixedly mounted to the support member in such a manner that they are spaced at predetermined distances around the periphery of the magnetic body, each magnetic circuit of the electromagnets being adapted to be independent of one another, and excitation change-over means for the electromagnets, the excitation change-over means being adapted to sequentially magnetize one of the electromagnets which is positioned forwardly with regard to a rotational direction of the rotational output shaft, so as to impart to the particular electromagnet a magnetic polarity opposite to that of the magnetic pole of the permanent magnet, whereby magnetic flux passing through the magnetic body converges in one direction so as to apply a rotational torque to the rotational output shaft. No force opposing movement of a rotor or movable element is generated.

Attorney, Agent or Firm: Flynn, Thiel, Boutell & Tanis ;

Primary / Asst. Examiners: Dougherty, Thomas M.; Haszko, D. R.

Maintenance Status: E2 Expired  Check current status
CC Certificate of Correction issued

INPADOC Legal Status: Show legal status actions

       
Related Applications:
Application Number Filed Patent Pub. Date  Title
US1992000816821 1992-01-03       


       
Parent Case:     This application is a Continuation-in-Part of application Ser. No. 07/816,821 filed on Jan. 3, 1992, now abandoned.

Family: None

First Claim:
Show all 16 claims
What is claimed is:     1. A motive power generating device for transforming magnetic energy into motive power comprising:
  • a stationary support member;
  • an output shaft rotatably mounted on the support member;
  • a permanent magnet disposed around the rotational output shaft for rotation therewith;
  • a magnetic body disposed in concentric relationship with said permanent magnet for rotation with said rotational output shaft, said magnetic body being subjected to the magnetic flux of said permanent magnet;
  • a plurality of electromagnets fixedly mounted on said support member in such a manner that they are spaced a predetermined distance apart around the periphery of said magnetic body, each magnetic circuit of said electromagnets being adapted to be independent of one another;
  • said magnetic body including magnetic notches and teeth which are disposed alternately in an outer peripheral portion thereof, each said tooth having an outer corner which is forwardly positioned in the rotational direction and has an acute angle configuration so as to cause further convergence of the magnetic flux;
  • certain of said electromagnets being disposed at positions corresponding to boundary portions between said notches and said magnetic teeth; and
  • excitation change-over means for said electromagnets to sequentially magnetize one of said electromagnets which is positioned forwardly in the direction of rotation with regard to the outer corner of the tooth so as to give said particular electromagnet a magnetic polarity magnetically opposite to that of the magnetic pole of said permanent magnet, whereby magnetic flux passing through said magnetic body is converged in one direction so as to apply a rotational torque to said rotational output shaft.


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Description: Show description

Forward References: Show 22 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (22)   |   Backward references (24)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 5pp US3344325* 1967-09 Sklaroff    
Get PDF - 7pp US3411059  1968-11 Kaiwa   Pulse motor and control system therefor
Get PDF - 4pp US3473061  1969-10 Soehner et al.   IGNITION ARRANGEMENTS FOR INTERNAL COMBUSTION ENGINES
Get PDF - 8pp US3555380  1971-01 Hings   LINEAR ROLLING MOTOR
Get PDF - 5pp US3577053  1971-05 McGee  Sperry Rand Corporation BRUSHLESS DC MOTOR INCLUDING A VARIABLE ATTENUATOR FED COMMUTATOR
Get PDF - 8pp US3707638  1972-12 Nailen  Alumina Ferrite Corporation of America ELECTRIC MOTOR UTILIZING A FERRITE STATOR OF LOW COERCIVENESS, FERRITE ROTOR OF HIGH COERCIVENESS, AND PHOTO-ELECTRIC COMMUTATION
Get PDF - 23pp US4095161  1978-06 Heine et al.  Gerhard Berger GmbH & Co. Fabrik Elektrischer Messgerate Variable stepping-angle synchronous motor
Get PDF - 9pp US4306164  1981-12 Itoh et al.  Oki Electric Industry Co. Ltd. Pulse motor
Get PDF - 9pp US4347457  1982-08 Sakamoto  Japan Servo Co. Permanent magnet type stepping motor
Get PDF - 8pp US4357551  1982-11 Dulondel   D.C. Impulsion motor
Get PDF - 5pp US4406958  1983-09 Palmero et al.  The Superior Electric Company Stepping motors with disc magnet
Get PDF - 7pp US4633108  1986-12 von der Heide  Papst-Motoren GmbH & Co. KG Direct current linear motor
Get PDF - 14pp US4712028  1987-12 Horber  Sigma Instruments, Inc. Magnetically assisted stepping motor
Get PDF - 6pp US4719378  1988-01 Katsuma et al.  Kabushiki Kaisha Yaskawa Denki Seisakasho Brushless motor having permanent magnet rotor and salient pole stator
Get PDF - 41pp US4728837  1988-03 Bhadra  Combustion Engineering, Inc. Variable speed, variable motion, electrically operated vibrator for screening machinery
Get PDF - 42pp US4774440  1988-09 Bhadra  Combustion Engineering, Inc. Variable speed, variable motion, electrically operated vibrator for screening machinery
Get PDF - 13pp US4786834  1988-11 Grant et al.  REM Technologies, Inc. Stator assembly for dynamoelectric machine
Get PDF - 8pp US4870306  1989-09 Petersen  Polaroid Corporation Method and apparatus for precisely moving a motor armature
Get PDF - 19pp US5023495  1991-06 Ohsaka et al.  Hitachi Metals & Shicoh Engine Moving-magnet type linear d.c. brushless motor having plural moving elements
Get PDF - 8pp US5030866  1991-07 Kawai  Kabushiki Kaisha Big Electric motor
Get PDF - 15pp US5105111  1992-04 Luebke   Electrical machine especially a D-C motor
Get PDF - 16pp US5191255  1993-03 Kloosterhouse et al.  Magnetospheric Power Corp. Ltd. Electromagnetic motor
Get PDF - 9pp US5192899  1993-03 Simpson et al.   Electromagnetically powered rotary motor apparatus and method
Get PDF - 13pp US5258697  1993-11 Ford et al.  Varelux Motor Corp. Efficient permanent magnet electric motor
  * some details unavailable
       
Foreign References:
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Publication Date IPC Code Assignee   Title
Get PDF - 34pp EP0082356 1983-06  B65G 54/02 EMAG MASCHFAB GMBH Device for transporting ferromagnetic work pieces 
Get PDF - 19pp EP0411563A1 1991-02  H02K 21/00 TECHNICAL ASSOCIATE CO LTD Same polarity induction generator 


Other References:
  • IBM Technical Disclosure Bulletin, Wound Rotor Incremental Motor, P. J. Davies et al, vol. 12, No. 12, May 1970, p. 2130.


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