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:
Jan. 15, 2002
Filed:
Feb. 17, 2000
Christer Andersson, Helsingborg, SE;
Henrik Stendahl, Helsingborg, SE;
Emotron AB, Helsinborg, SE;
Abstract
The invention relates to a process for estimating an instantaneous resistance in a phase winding in a reluctance machine. The process comprises the steps of: receiving a signal (U ) indicating a voltage (U ) across at least one phase winding; receiving a signal (i ) indicating a current (i ) through the phase winding; estimating a magnetic flux in response to the voltage signal and the current signal; estimating an instantaneous resistance (R ) in the phase winging in accordance with a phase relation between the current signal (i ) and the magnetic flux signal (&PSgr; ). The invention also relates to a method for controlling an electrical machine and a drive system for performing the method.