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:
May. 18, 1999
Filed:
Nov. 25, 1996
Malcolm Philip Wilson, Crewkerne, GB;
Switched Reluctance Drives Limited, Harrogate, GB;
Abstract
An electrical machine system includes at least one electrical machine, such as a switched reluctance machine, that produces a magnetic field. According to one embodiment, the machine is a rotary machine with a rotor, a stator, and a sensor for indicating their relative movement. The sensor of the controller is powered by a power supply unit, the power output of the power supply unit being derived from the magnetic field of the machine. The power supply preferably is isolated electrically from the current running in the machine, and from the power supply for the machine, reducing the risk of voltage transience, noise, and other undesirable interference. A corresponding method provides similar advantages.