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:
Apr. 23, 2019
Filed:
Feb. 04, 2016
GM Global Technology Operations Llc, Detroit, MI (US);
Yo Chan Son, Rochester Hills, MI (US);
Rachel L. Hoener, Orion, MI (US);
Milan Ashok Vadera, Rochester Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A device for monitoring a resolver disposed on a rotatable member is described herein, and includes a controller including a microprocessor circuit and an interface circuit connected to the resolver, wherein the microprocessor circuit includes a dual-core central processing unit (CPU), a pulse generator, a sigma-delta analog-to-digital converter (SDADC), a global memory device, an internal communication bus and a direct memory access device (DMA). The microprocessor circuit is disposed to control the pulse generator to generate an excitation pulse transferable to the excitation winding of the resolver, and control the SDADC to capture data from the secondary windings of the resolver and store the captured data in the memory buffer. A control routine is executed to detect an envelope for the captured data, and a rotor position for the resolver is determined based upon the detected envelope.