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. 02, 1997
Filed:
May. 02, 1996
Geoffrey B Lansberry, Cambridge, MA (US);
Chrysler Corporation, Auburn Hills, MI (US);
Abstract
A time delay compensated synchronous reference frame controller for a drive motor having a rotor and using an alternating current having a phase angle includes a low pass filter electrically connected to the drive motor for eliminating high frequency components of the alternating current, a coordinate transformer electrically connected to the low pass filter for receiving the alternating current and for defining a moving reference frame based on the phase of the alternating current, a controller electrically connected to the coordinate transformer for driving the alternating current to a proper phase relative to a flux of the rotor of the motor, an inverse coordinate transformer electrically connected to the compensator for receiving the alternating current and for transforming the moving reference frame to a stationary reference frame, and a reference frame shifter operatively connected to this coordinate transformer and the inverse coordinate transformer wherein the reference frame shifter defines a shift in the moving reference frame based on time delays created by the low pass filter and the controller.