Switched reluctance machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 5, 1997
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Mar 28, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A reluctance machine comprises a rotor, defining rotor poles and a stator defining stator poles. Each stator pole pair, creating a flux path through the rotor includes only one winding mounted on one of the stator poles. The invention is particularly applicable to a machine having a four-pole field pattern and an odd number of phases. The coils are placed on alternate stator poles such that the space between stator poles can be used exclusively for a single winding. The single winding is made larger to compensate for the lack of a winding on its associated pole.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
NIDEC SR DRIVES LTD | EAST PARK HOUSE OTLEY ROAD HARROGATE NORTH YORKSHIRE HG3 1PR |
International Classification(s)

- 1995 Application Filing Year
- H02K Class
- 529 Applications Filed
- 227 Patents Issued To-Date
- 42.92 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Fulton, Norman Neilson | West Yorkshire, GB | 9 | 56 |
# of filed Patents : 9 Total Citations : 56 |
Cited Art Landscape
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Patent Citation Ranking
- 8 Citation Count
- H02K Class
- 1.69 % this patent is cited more than
- 28 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Feb 08, 2011 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:SWITCHED RELUCTANCE DRIVES LIMITED;REEL/FRAME:026064/0668 Owner name: NIDEC SR DRIVES LTD., UNITED KINGDOM Effective Date: Feb 08, 2011 |
Jan 07, 2009 | FPAY | FEE PAYMENT | year of fee payment: 12 |
Jan 11, 2005 | FPAY | FEE PAYMENT | year of fee payment: 8 |
Jan 18, 2001 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Jan 20, 1998 | CC | CERTIFICATE OF CORRECTION | |
Aug 05, 1997 | I | Issuance | |
Jul 24, 1997 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Jun 07, 1995 | F | Filing | |
Jun 05, 1995 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FULTON, NORMAN NEILSON;REEL/FRAME:007531/0775 Owner name: SWITCHED RELUCTANCE DRIVES, LTD., UNITED KINGDOM Effective Date: Jun 05, 1995 |
Mar 28, 1995 | PD | Priority Date |

Matter Detail

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