The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1999
Filed:
Dec. 05, 1997
Charles Richard Elliott, West Yorkshire, GB;
Switched Reluctance Drives Limited, North Yorkshire, GB;
Abstract
A hysteresis current controller includes a hysteresis current control device which has an adjustable hysteresis band. A feedback signal indicative of current in the load is compared with a current demand signal to produce an error signal which is received by the hysteresis control device. The switching output of the hysteresis control device is monitored to derive a signal indicative of its frequency which is used in a control loop to vary the hysteresis band to maintain the switching frequency output substantially constant.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile