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:
Jun. 20, 1995
Filed:
Nov. 15, 1994
James Bausch, West Linn, OR (US);
Synektron Corporation, Portland, OR (US);
Abstract
A control circuit and method for controlling an electric machine has a plurality of stator windings energized by current signals. The control circuit includes a driver circuit that generates three pulse width modulated current signals responsive to an error signal that is representative of a phase angle error, where each of the respective current signals is one phase of a three phase signal. The driver circuit also generates phase information associated with the current signals. The machine has three input terminals each of which receives a respective one of the three current signals generated by the driver circuit. A multiply circuit multiplies the terminal voltage of at least one of the three terminals with the phase information to generate the error signal.