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Harrogate, United Kingdom

Switched Reluctance Drives Limited

USPTO Granted Patents = 119

% Expired Patents = 11.8

EPO Patents = 8

Trademarks = 1

Forward Citations = 1,690

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49 inventors (with patents filed for the assignee):

Michael James Turner (18 out of 21 patents)

Steven Paul Randall (13 out of 23 patents)

Norman Neilson Fulton (10 out of 11 patents)

4. Michael Leo McClelland (10 out of 13 patents)

5. David Mark Sugden (10 out of 10 patents)

6. Peter Richard Mayes (9 out of 10 patents)

7. Paul Donald Webster (7 out of 7 patents)

8. Rex Mountford Davis (7 out of 13 patents)

9. John M Stephenson (7 out of 7 patents)

10. Michael Paul Tankard (6 out of 8 patents)

11. Geoffrey Thomas Brown (6 out of 6 patents)

12. Howard James Slater (5 out of 5 patents)

13. William Frederick Ray (5 out of 14 patents)

14. Charles Richard Elliott (4 out of 6 patents)

15. Peter Mark Moriarty (4 out of 4 patents)

Core Competencies:

Rotor Position Detection

Control Strategy

Electrical Machines

Switched Reluctance Motors

Power Supply Circuit

Current Control Circuit

Variable Reluctance Generator

Electro-Mechanical Transmission

Noise Reduction

Winding Techniques

High Power Factor

Current Shaping

119 patents: Sort by Forward Citations

1. 7906931 - Control of a switched reluctance machine (2011-03-15),

2. 7888896 - Operating electrical machines from a DC link (2011-02-15),

3. 7880415 - Control of a brushless electrical machine (2011-02-01),

4. 7804269 - Control of an electrical machine (2010-09-28),

5. 7737646 - Operating electrical machines from a DC link (2010-06-15),

6. 7640128 - Rotor position detection in an electrical machine (2009-12-29),

7. 7560845 - Rotor for a switched reluctance machine (2009-07-14),

8. 7388345 - Rotor position detection in an electrical machine (2008-06-17),

9. 7370508 - Rotor position detection in an electrical machine (2008-05-13),

10. 7288915 - Rotor position detection of an electrical machine (2007-10-30),

11. 7268516 - Circuit for use with switched reluctance machines (2007-09-11),

12. 7233873 - Rotor position detection in an electrical machine (2007-06-19),

13. 7208906 - Excitation of switched reluctance motors (2007-04-24),

14. 7205694 - Control of a switched reluctance drive (2007-04-17),

15. 7176650 - Operation of an electrical machine (2007-02-13),

Company Overview

Switched Reluctance Drives Limited, based in Harrogate, GB, specializes in the development and manufacturing of advanced switched reluctance drive systems. The company focuses on innovative technologies such as rotor position detection, control strategies, and electrical machines, which are essential for efficient motor operation. Their expertise extends to switched reluctance motors, power supply circuits, current control circuits, and variable reluctance generators, positioning them as a key player in the electro-mechanical transmission sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

119 Patents

#1 in Harrogate

#144 in United Kingdom

#6,702 in the World

Harrogate, United Kingdom

Switched Reluctance Drives Limited

Forward Citations = 1,690

49 inventors:

Michael James Turner (18 out of 21 patents)

Steven Paul Randall (13 out of 23 patents)

Norman Neilson Fulton (10 out of 11 patents)

4. Michael Leo McClelland (10 out of 13 patents)

5. David Mark Sugden (10 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Switched Reluctance Drives Limited. Retrieved from https://idiyas.com/company/switched-reluctance-drives

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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