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:
Jul. 29, 1997
Filed:
Jun. 07, 1995
David Mark Sugden, Leeds, GB;
Switched Reluctance Drives, Ltd., Leeds, GB;
Abstract
A circuit and method for controlling a switched reluctance drive having at least one phase winding and a rotor position encoder that provides a set of signals corresponding to the absolute position of the rotor relative to the stator. The circuit monitors the set of signals and generates a high frequency clock signal having a frequency substantially proportional to the frequency at which the set of signals changes state. The high frequency clock signal comprises a number of digital pulses for each rotor revolution that is an integral multiple of the number of digital pulses from the rotor position transducer for each rotor revolution and corresponds to the incremental position of the rotor. The high frequency clock signal is applied to a counter that is reset upon each change in state of the set of signals. The output of the counter is compared to predetermined values and the at least one phase winding is energized and de-energized in response to the results of the comparison.